Skin cytology in dogs

Report includes: Contact Info, Address, Photos, Court Records & Review Rub or impress a slide on moist, exuding or greasy surface of infected skin. Role a cotton bud on the skin surface or insert it in the ears and role cotton bud on the slide. Insert needle (25 - 27 ga.) into the pustule holding the needle parallel to the skin so that only the pustule is punctured, no deeper cells or blood are required, top is. Cytology in Dogs Cytology is the examination and study of blood or tissue cells under a microscope that can be done in dogs and other animals. Cytology can be used to detect inflammation, infection, bacteria, fungi, parasites and cancer. Cytology involves examination of a tissue or fluid sample RBCs are often present in cytology preparations, where they can be used as a comparative and absolute scale. RBCs vary slightly with species; in dogs, RBCs are ~7 microns in diameter. Medium and large lymphocytes, which have a slightly more open chromatin pattern and more cytoplasm, can also be seen in inflammatory processes

Finding eosinophils on skin cytology suggests the presence of parasites, fungi, or food allergies. Eosinophils are rarely found in dogs with atopic dermatitis, although they are common in cats. FIGURE 7 Cytology provides a quick and minimally invasive way to evaluate cutaneous tumors in dogs and cats. It may provide a definitive diagnosis and can, thus, help the clinician to determine whether further staging tests, such as lymph node aspiration or chest radiography, are indicated The textbooks on skin cytology and dermatology in dogs and cats use a hybrid cytological classification of skin cancers; indeed, although for certain cancers a definition based on the origin of the cells and/or their architectural arrangement (e.g. epithelial and mesenchymal tumours) is used, other tumours are grouped based exclusively on their morphology (e.g. round cell tumours) 6 Nestlé PURINA Interpretation of Canine and Feline Cytology tivity testing. Analysis of cell count, protein concentra - tion, and specific gravity will determine if the fluid is a transudate, a modified transudate, or an exudate (see thetable Guidelines to Distinguishing Transudates and Exudates, Part IV).Cells should be enumerated manually or by elec

Skin Cytology Collection. Cytology from the skin can be collected by direct or tape techniques.. Clinical lesions that should be considered as excellent sites for sampling include but are not limited to the following: pustules, papules, vesicles, bulla, erythema, alopecia, crusts, waxy scale, hyperpigmentation, lichenification, keratosebaceous debris, draining tracts, erosions and ulcerations Cytology is a quick, simple-to-perform method to achieve useful information about the possible etiology of cutaneous lesions. This reference guide was created as a source of step-by-step recommendations to assist the veterinary team in proper collection and preparation of appropriate cytological samples. Dechra's goal is to allow you to confidently diagnose and prescribe utilizing cytology

Background Profile Found - Skin Do

Skin cytology can help identify bacterial or Malassezia infection, as well as characterize inflammatory infiltrate What Is Skin Cytology? Skin cytology is a test done by a veterinarian during which he or she collects a sample of cells from a dog's skin and examines them under a microscope to aid in a diagnosis. To collect the cells, the veterinarian rolls a swab firmly over some affected skin and then over a clean microscope slide to transfer cells was supported by subsequent histologic examination. In some instances cytology was consid- ered essential in rendering a diagnostic opinion even though histology was available. In the dog, skin and subcutis are the most common sites for neoplasms, accounting for 67.5% of the neoplasms in one survey [3]. We have found that round cell tumor Skin. Keratin bars (rapid stain) Collagen. Emperipolesis in squames (rapid stain) Degenerating squames (rapid stain) Emperipolesis in squames. Emperipolesis in squames. Emperipolesis in squames. Emperipolesis & keratinaceous debris This cytological aspect is very important in canine skin cytology, because the failure to see bacteria in samples from deep pyogranulomatous lesions does not authorise us to rule out a pyoderma. In chronic lesions, cytological samples enriched with lymphocytes and plasma cells indicate continuous antigenic stimulation. Fig. 3.2

Color Atlas of Canine Cutaneous Round Cell Tumors • MSPCA

The lesions vary from alopecia, broken hair shafts, crusts, scales, and erythema to raised nodules on the head, feet, and tail of dogs and cats. Cytologic specimens reveal a pyogranulomatous inflammation with degenerate neutrophils and large epithelioid macrophages Cytology is the microscopic examination of cells that have been collected from the body. There are different methods for collecting cells from body surfaces including skin scrapings, impression smears, swabs, and flushes. Once the cells are collected, they are examined under a microscope. Sometimes examination of surface cells does not provide a definitive diagnosis and additional samples must. Papules may develop into pustules and crusts, and any dog with an acute papular rash may eventually show pustules or crusts Malassezia (broad-based budding yeasts) and degenerate neutrophils on impression smear cytology from a dog with Malassezia pododermatitis secondary to allergic dermatitis (immersion oil - 100x objective). Sample collection technique is based on the location and type of skin lesions. Impression smears or swabs can be used for greasy lesions

Cutaneous Cytology Zoetis C

  1. e the next diagnostic steps. Skin cytology is often needed to microscopically exa
  2. Skin Cytology in Dogs and Cats Kinga Gortel DVM, MS, Diplomate ACVD Why do skin cytology? Skin cytology is a very high-yield procedure for patients with skin disease. It tells us more about what is going on with the skin, more quickly, compared to most other diagnostic tests. It is also inexpensive to perform
  3. The aim of this course is to gain a better understanding of the correct implementation and interpretation of cytology as an essential technique in diagnosing..

Cytology in Dogs - PetPlac

Melanocytic neoplasms are common in dogs and frequently occur within the oral cavity or in haired skin. The behavior of melanocytic neoplasms is variable and depends on tumor location, size, and histopathologic features. This study compared cytopathology and histopathology of 32 lymph nodes from 27 Ear cytology (ear swab check): $30; Skin cytology (skin cell check): $30; Fine needle aspirate (lump check): $30; X-ray (per issue - no limit on views): $120; Urine and Fecal: Urinalysis (including sample collection): $60; Urine Culture: $114; Fecal: $33 for an in-house test. Fecals sent to the outside lab are typically around $60 Dry skin on dogs is frustrating for dogs and owners alike. There are many potential causes for dry skin, which can make diagnosing skin conditions in dogs tricky. If dry, itchy, or flaky skin is. Cytology is the microscopic examination of cell samples. Cytology can be used to diagnose growths or masses found on the surface of the body, and also to assess bodily fluids, internal organs, and abnormal fluids that may accumulate, especially in the chest and abdomen. Cells can be collected using various methods including fine needle aspiration, skin scraping, impression smear, cotton-tipped.

Cytology - Clinical Pathology and Procedures - Merck

Skin cytology forms an important part of any dermatological investigation and lends itself well to input from the veterinary nurse. Basic diagnostic procedures such as acetate tape impression smears, direct and indirect impression smears and fine needle aspirates can be undertaken with only a minimal amount of equipment and will produce clinical information that can contribute hugely to the. Basal cell tumor is the most common skin tumor of cats, also common in dogs. It is usually benign and typically presents as a solitary intradermal mass. The cells are arranged in tight clusters, sheets or rows and have a uniform cuboidal shape with scant amounts of deeply basophilic cytoplasm that may be pigmented Cytology is a quick, relatively easy diagnostic technique for identification of tumors. This method can be used as a rapid diagnostic method but should be accompanied with additional methods for conformation. Few studies have investigated the accuracy of cytology in diagnosing cutaneous and subcutaneous tumors in dogs (Krithiga et al., 2005)

inflammatory cells are not found on normal skin cytology. On otic cytology, >3 yeast/OIF in dogs and >1 yeast organism/OIF in cats may be considered abnormal. For bacteria, > 5 cocci/OIF and > 1 rod/OIF is considered abnormal on otic cytology, as are any inflammatory cells. A recent paper describes a semiquantitative way t 3. Dhaliwal RS, Kitchell BE, Marretta SM: Oral tumors in dogs and cats. Part II. Prognosis and treatment. Comp Cont Edu 20:1109-1119, 1998. 4. Dhaliwal RS, Kitchell BE, Marretta SM: Oral tumors in dogs and cats. Part I. Prognosis and treatment. Comp Cont Edu 20:1011-1021, 1998. 5. Rogers KR, Barton CL, Habron JM: Cytology during surgery. Com

Dermatology Diagnostics: Cutaneous Cytology Today's

Skin scrapings performed with a n. 10 or 20 blade on greasy seborrhoeic material may be smeared on a glass slide, in order to look for Malassezia or very superficial bacteria. Material for cytology can be collected with a swab from fistulas, deep pyoderma, ears or, with a moistened swab, from a greasy skin surface Dog with a skin problem = Do a skin scraping cytology exam. The dermatologists harp on this, and for good reason. When a dog has a skin problem, you frequently see a very non-specific outward appearance. If he's been scratching it, it just looks like it's been scratched a lot. You will probably see hair loss, flaking skin, redness, crusts.

Cytology: Common Neoplastic Skin Lesions in Dogs & Cat

  1. transmissible cancer that affects dogs. It is spread by the transfer of living cancer cells between dogs, usually during mating. In male dogs, it affects the penis and foreskin whereas in female dogs, it affects the vulva. The tumor mostly has cauliflower like growth. Cytology : TVT is a round cell tumor. The cells will be large round with.
  2. Cytology is also used to diagnose yeast on the skin. Treatments for yeast infections on the skin can include topical antifungal creams, wipes, sprays, and shampoos. Topical ingredients that are effective in treating yeast include chlorhexidine, miconazole, and ketoconazole
  3. Gross, TL, et al: Skin Diseases of the Dog and Cat—Clinical and histopathological Diagnosis, 2 nd Ames, Iowa: Blackwell, 2005, pp. 581-582 Cowell RL, et al: Diagnostic Cytology and Hematology of the Dog and Cat, 3 rd St. Louis, Missouri: Mosby Elsevier, 2008, pp. 100-101
  4. Atlas » Cytology Cytology . Facebook. Twitter. Linkedin. Pinterest. StumbleUpon. Artifacts (cytology) Skin . 110 Photos Glandular tissue . 39 Photos Lymph node . 107 Photos (dog, cat) 19 Photos Synovial fluid (large animal) 16 Photos Eye . 30 Photos.
  5. However, there is another, less common fatty tumor-like mass known as xanthoma that should be considered, especially when evaluating birds with one or more skin masses. In this brief article, xanthomas in birds, cats and dogs will be reviewed with a special focus on the use of cytology and histopathology to diagnose this unique entity
  6. e the cause of your pet's skin problem. Below is an example of a skin scraping from a pet with a demodex (mite) infection. Skin culture: Resistant skin infections are beco
  7. Clinical findings. Malassezia dermatitis (Figure 1) is common in dogs and affected sites include lip margins, ear canals, axillae, groin, ventral neck, interdigital skin, facial folds or tail folds, perivulvar skin, and perianal skin ().Lesions may be localized or generalized. Pruritus, a major sign, is usually severe and is accompanied by unpleasant odor

Cytology of Skin Tumours Veterian Ke

Fine needle aspiration (FNA) cytology is a non-invasive technique that does. not require anesthesia and very rarely requires sedation (determined by patient's level of cooperation and the location and. size of the nodule). In one study, after samples not containing adequate cells for evaluation were excluded, this technique was described as in ten dogs, the external ear (pinna, seven; ear canal, three). Tumors occurred at a variety of other sites in ten dogs, including the skin of the perianal region in two, the dorsum of the head in two, and one each in the skin of the lateral cervical region, forelimb, ven- trolateral thorax, ventral abdomen, lateral thigh, and lateral stifle

Next, a sample of the skin will be taken, initially this is done by rubbing the infected skin on a microscope slide to look for bacteria. This is called a skin cytology. This may be enough for your veterinarian to diagnose what is going on. In other cases, the skin may be biopsied and/or cultured to confirm the diagnosis Some types of skin cancer. Scabies and Demodex mites can be directly identified on a skin scraping. Bacterial and yeast infections may be diagnosed this way or by skin cytology, which is a test in which a swab is run firmly over the skin and then over a microscope slide Seborrhea is a skin condition that occurs in humans and animals, including dogs. It is a common cause of flaky skin and oily coat in dogs. Your veterinarian will perform skin tests like skin scrapes, cytology, biopsy, and/or culture to determine if an infection is present (bacterial, fungal/yeast, or parasitic).. Skin Cytology This is a microscopic examination of the material found on the surface of the skin. Similar to the ear cytology, this test can be helpful in determining whether bacteria, pus, or yeast is complicating your pet's situation

Dermatitis is a skin condition that causes itching, redness, and lesions on the skin of dogs. It is often a chronic condition that many dogs suffer from and can occur year-round, seasonally, or situationally depending on the underlying cause of the problem. A skin scrape and cytology may be collected to look for mites, bacteria, and yeast. Dr. Louis N. Gotthelf. Bacterial folliculitis is the most common type of bacterial skin infection in the dog. The Staphylococcus pseudintermedius bacteria, which is a normal resident bacteria of canine skin, can cause infection of the skin in some dogs. Current theories indicate that most dogs who develop the In dogs, superficial pyoderma is the most common form of pyoderma, and it is also the most common reason for antimicrobial use in small animal practice. Performing skin cytology is key for the identification of bacteria and inflammatory cells, with cocci and neutrophils being the most common findings Systemic lupus affects multiple organs, including the skin for 40% to 50% of affected dogs. Systemic lupus is characterized by production of a variety of autoantibodies that form circulating immune complexes ( FIGURE 10 ). These complexes can become stuck in different parts of the body, including organs

Pythiosis is an infectious disease caused by a fungus-like organism, Pythiuminsidiosum, that naturally inhabits wetlands, ponds, and swamps. In dogs, the disease usually is manifested by gastroenteritis or dermatitis. Presumably dogs become infected by ingesting, or swimming in contaminated water A 2-tiered histologic grading scheme for canine cutaneous mast cell tumors (MCTs) is based on morphologic characteristics of neoplastic cells, including karyomegaly, multinucleation, nuclear pleomorphism, and mitotic figures. Aspirates from MCTs may provide the same information more quickly, inexpen Any disruption of the normal pH balance of a dog's skin (about 7.5 on the standard pH balance scale of 0 - 14) can cause too much sebum (oily skin) or not enough sebum (dry skin). These benign growths are common in dogs, especially middle-aged and older dogs. Sebaceous adenomas in dogs are simply benign (not cancerous) tumors


Goal Two: Skin and Ear Cytology - OSU CVM Veterinary

Folliculitis in dogs is most commonly caused by bacteria, but other culprits include parasitism, fungal infections, systemic disease, immune system disorders, endocrine issues, and local trauma. Your dog's folliculitis may be caused by the following conditions: Canine acne. Skin-fold pyoderma. Interdigital pododermatitis, or cysts For example, in dogs, an average of >25 bacteria per 40× field may be reported as marked; in cats, a marked number may be >15 bacteria per 40× field. 3. An alternative reporting scheme grades ear cytology samples based on the presence of bacteria, yeast, and inflammatory cells by semi-quantitative methods:

On average, a mild case of pyoderma in dogs can be diagnosed and treated for $200 to $400. This includes exam costs ($50 to $80), skin cytology ($50), culture ($150-$200), and treatment ($30-$70), says Collier. However, the cost of treatment can vary vastly depending on other health conditions your dog may have and where you live and are. In most dogs, this procedure can be performed quickly and without the need for sedation or anesthesia. The tumor cells are deposited onto a microscope slide and submitted to a veterinary clinical pathologist for microscopic evaluation (cytology). Most skin tumors are readily diagnosed with this procedure This book discusses canine and feline skin cytology and the importance of this diagnostic tool in interpreting skin lesions. With more than 600 clinical and cytological color pictures, it explains the cytological patterns observed in all cutaneous inflammatory and neoplastic lesions in cats and dogs, as well as cutaneous metastasis of non.

Performing skin surface cytology - DVM 36

  1. Pruritus is the medical term for itching and is a common clinical sign of many skin disorders. It is often accompanied by red, inflamed areas of skin and may lead to skin infection called pyoderma. Flea allergy dermatitis, seasonal allergies, atopy, food allergies, contact dermatitis, and sarcoptic mange are some of the most common causes of pruritus in dogs
  2. Aspirating skin masses does not typically require sedation, but sampling from an oral often requires sedation. The aspirated cells should be evaluated by a board-certified veterinary clinical pathologist to obtain a definitive diagnosis. The evaluation of the aspirated cells is called cytology. Occasionally, cytology is not diagnostic
  3. A sebaceous cyst typically appears as a small, raised, well-defined round structure in the skin. Usually these cysts are solitary, but some dogs may be prone to getting several cysts in the same area of the body. A sebaceous cyst may be firm or it may feel like it is filled with fluid. If the cyst is infected, it may be red, inflamed, and painful
  4. ation of samples taken from the skin; your vet will often use clear adhesive tape to take these samples. Treatment options include shampoos, sprays and wipes
Clinpath Cytology Images: Cutaneous Cytology at Tufts

By the time a hemangiosarcoma is seen in the skin, the cancer has usually spread to the dog's organs. A veterinarian will not be able to tell you if the growth is a hemangioma or a hemangiosarcoma just by examining it; a biopsy, or at least a cytology, is required. To be completely sure which type of tumor you are dealing with, a biopsy is. Additionally, dogs can also suffer from secondary seborrhea, which is usually a sign of an underlying disease. Symptoms of secondary seborrhea include excessively scaly skin, crusty scabs, or oiliness, and sometimes pus-filled inflammations, infections, and hair loss. Hair loss is always a good cue that something might be wrong Diagnosing the Secondary Skin Infections in Dogs. There is often a secondary infection that develops on a dog's skin with FAD. Your vet can use cytology to diagnose any secondary skin infections. Cutaneous cytology is a valuable diagnostic tool

If the more common causes of other canine skin problems have been ruled out, a skin cytology can give your vet a better look at the surface skin cells and a skin biopsy can look at the deeper. He or she will perform cytology, i.e. take a sample from the pup's infected skin or ear and review it under a microscope to confirm if there's a yeast infection. Your vet will also analyze the sample for other immune system issues because canines with yeast infections usually also have skin mites or bacterial infections Although cytology is useful in the provisional diagnosis of cutaneous lymphoma, histologic confirmation is recommended . Melanoma. Melanomas are relatively common in dogs and rare in cats. In dogs, melanomas occur most often in middle-aged to older animals, especially in dogs with heavily pigmented skin

Skin Cytology Test in Dogs - dog healt

Dog, Skin, Cytology, FNA: Squamous Cell Carcinoma. Squamous cell carcinomas may occur anywhere in the skin in dogs and cats as well as other species. They are often ulcerated and secondarily and superficially infected Skin Cytology. Skin cytology is the best diagnostic test to assess infection on your pet's skin; various methods are used, ranging from tape sampling to swabbing of the skin. The skin lesion is sampled and then microscopically examined. The test can be done at the time of the visit and results are available within 15-20 minutes

About Book. This book discusses canine and feline skin cytology and the importance of this diagnostic tool in interpreting skin lesions. With more than 600 clinical and cytological color pictures, it explains the cytological patterns observed in all cutaneous inflammatory and neoplastic lesions in cats and dogs, as well as cutaneous metastasis of non-primary skin neoplasms in dogs, the appendages are the hair, claws, footpads, and sebaceous, sweat and mammary glands. Few studies report the initial formation of these structures in domestic species. Süsskind-Schwendi et al. [4] reported the formation of claws in dogs. The skin and its appendages were studied in pigs b

Cytology of Canine Cutaneous Round Cell Tumor

The histiocytoma is a tumor originating from what is called a Langerhans cell. This cell lives in the skin and serves as part of the immune system by processing incoming antigens and presenting them to other immunologic cells Skin cytology also includes the inspection of a skin sample under a microscope; however, unlike a skin scraping, a skin cytology is done to identify a bacterial infection. then only a topical medication may be prescribed. If the infection is more advanced and covers a lot of your dog's skin, a topical medication may prescribed in. Epidermal collarettes in dogs most often indicate bacterial folliculitis. Other signs that may occur in conjunction with epidermal collarettes are the presence of pustules and hair loss along with or without intense itching. Dogs with chronic conditions may develop a thickening of the skin and hyperpigmentation, which is a darkening of the skin. 1. Deep skin scrapings were performed to evaluate the dog for demodex. No demodex mites were found. Demodex was ruled out as the cause of the adult-onset patchy hair loss. 2. Skin surface cytology specimens were collected and evaluated. There were no bacteria or yeast recovered. Diagnostic tests submitted to the laboratory during the initial.

2) Skin Cytology: Cutaneous cytology is used to identify bacteria or yeast, the presence of cells, neoplasia, or cells that may suggest immune disease (such as acantholytic cells seen in cases of pemphigus). Impression smear: Used for more superficial lesions such as moist areas, pustules, draining tracts, etc. It can also be helpful on. Skin cytology: let the lesion morphology guide your technique. Posted on April 28, 2012 by skinvet. When it comes to taking samples for skin cytology, there is no one technique that is best in every situation. Here are my favorite techniques, and when I find them most useful: 1. Cellophane tape stripping is the technique that I now use most often

Idiopathic sterile nodular panniculitis may affect any sex of dog. Young dogs are over-represented, as are certain breeds, including: This disease is characterized by bumps or nodules in the fatty tissue under the skin. Nodules and ulcerated lesions are most commonly found on the trunk. The nodules often ulcerate or erupt, causing open wounds. dermatitis, dermatophytosis, etc.). Cytology should be performed in the case of a patient that has non-responsive pyoderma. If rods are seen on cytology in addition to cocci, then the staphylococcal pyoderma may be complicated by a gram-negative infection. In any event, culture and sensitivity should be performed to aid in antibiotic selection Dogs with multiple skin mast cell tumors may not have a worse prognosis than a dog with one if they are all low grade and can all be adequately removed. Active surveillance for any new lump or bump is essential in such cases, and early evaluation is recommended any dog with a skin mass Book Description: This book discusses canine and feline skin cytology and the importance of this diagnostic tool in interpreting skin lesions. With more than 600 clinical and cytological color pictures, it explains the cytological patterns observed in all cutaneous inflammatory and neoplastic lesions in cats and dogs, as well as cutaneous metastasis of non-primary skin neoplasms

Diagnosis is accomplished via dermatologic examination, skin scrapings, cytology, culture, and dermatohistopathology. The potential for this infection is the reason to perform tissue fungal cultures and special stains on biopsy samples when working to diagnose diseases of the nasal planum Cytology by fine-needle aspiration, directing a needle into an enlarged lymph node or skin lesions to obtain cells for evaluation, is another possible test. If your vet can feel an enlarged spleen or liver, they can even obtain cytology samples of these organs with ultrasound guidance Skin cysts on dogs are sacs that are lined with secretory cells and which are found on the skin. Once the sacs form, there is a buildup of fluid resulting in swollen bumps on the skin. While some of the cysts will retain the fluids, others will dry out and thus the cyst will end up with firm material inside Cryptococcus can affect a dog's brain, eyes, lymph nodes, and skin. Symptoms include coughing, imbalanced gait, circling, seizures, inflammation of the eyes, blindness, and swollen lymph nodes. Cryptococcus is treated using imidazole-based medicines like miconazole or clotrimazole. Blastomycosis —Blastomycosis is a regional systemic fungal.

Mast Cell Tumors. Description- Mast cell tumors (MCTs) or mastocytomas are the most common cutaneous tumor found in dogs.It accounts for 16-21% of all cutaneous tumors. Older dogs of mixed breeds have a high propensity for the disease. It has been reported in breeds like Boxers, Boston Terriers, Labrador Retrievers, Beagles and Schnauzers Group 2 (dogs with first-time Staph skin infections): Dogs between 1 and <10 years old. Physical examination, bloodwork, and urine samples are within normal parameters. First time skin and/or ear infections. Evidence of clinical signs representative of pyoderma (bacterial skin infections) with a clinical lesion score of >0 The histiocytoma is an unsightly but benign skin tumor that tends to arise on the skin of young dogs. While young dogs (under three years of age) are more likely to get these (especially on the face and extremities), they can happen to dogs of any age in just about any location. Cytology can be very helpful for initial diagnosis, but isn't. Mast cell tumors (MCT) represent a cancer of mast cells, which are a type of white blood cell involved in allergy and inflammation. Mast cell tumors are the most common skin tumor in dogs. Older dogs are most commonly affected. Some predisposed breeds of dogs include Boxers, Boston terriers, Bulldogs, pugs, Labrador retrievers, golden retrievers, Weimaraners, Rhodesian Ridgebacks, cocker.

Interdigital Cyst Syndrome in dogs – Vet360Cytology of microbial skin diseases in dogs and cats - YouTubeBlastomycosis Outbreak: Source Of Fungal Infection CasesCanine Bacterial Pyoderma: Indications and Skin Sampling

To determine if the dog has folliculitis, a vet will identify the symptoms and will often do a diagnostic test including skin scrapings for mites, skin cytology, fungal culture, ringworm testing. Content. This book discusses canine and feline skin cytology and the importance of this diagnostic tool in interpreting skin lesions. With more than 600 clinical and cytological color pictures, it explains the cytological patterns observed in all cutaneous inflammatory and neoplastic lesions in cats and dogs, as well as cutaneous metastasis of non-primary skin neoplasms This video explains more about skin cytology in dogs. Histology or Skin Biopsy. If the results of the cytology aren't sufficient, your veterinarian may have your dog undergo histology. Histology is the microscopic examination of tissue. To do this, the sample must be collected surgically Cutaneous Melanoma: appears on the skin Ocular Melanoma: found on a dog's eyelids or directly on the eye Oral Melanoma: appears anywhere around the mouth or oral cavity (accounts for 80% of all melanomas in dogs) Subungual Melanoma: found in between the toes and the toenail bed Melanomas are categorized as either benign or malignant. Benign melanomas, also called melanocytomas, are typically.