SA Skin Tumors Flashcards
(25 cards)
What is this cell?
Mitotic figure; dividing cell
Benign neoplasm of Langerhans cells that usually occurs in young dogs that is classically called “button” tumors because of its smooth, pink, raised button appearance
Canine Cutaneous Histiocytoma
Cutaneous Tumors
Epithelial
Mesenchymal
Round cell
Melanocytic
Other
Round Cell Neoplasms
Lymphoma
Plasma cell
Mast Cell
TVT
Histiosarcoma
Components of the Epidermis
Keratinocytes
Langerhans
Melanocytes
Components of the Dermis
Mesenchymal tissue
Round Cells
Epithelial cells
Components of the Subcutis
Mesenchymal tissue
- aidpose tissue, collagen, blood vessels, lymphatics
Neoplamsa of Epidermal Keratinocytes
Papillomas
Squamous Cell Carcinomas
Common, benign, exophytic, verrucous appearance in young dogs typically. Spontaneous regression or excision;
Viral Papilloma
Polyploid-smooth to papillate surfaces that are potentially due to chronic irritation
Squamous (non-viral) papilloma
Malignant neoplasm of keratinocytes that can be UV associated/induced and often presents on sparsely haired skin and/or skin areas of light pigmentation. It is invasive, destructive, and can metastasize to regional lymph nodes +/- lungs
Squamous Cell Carcinoma
What is this neoplasm
SCC in a cat
Old cat with multiple pigmented plaques; Bowen’s like disease; not related to UV exposure but can be a result of papillomavirus
Multicentric SCC
Neoplasm in dogs that can affect a single or multiple digits; +/- the loss of the nail with secondary infection of the nail bed; lysis of P3; potential local LN metastasis with dDx of keratoacanthoma subungual malignant melanoma onychitis and osteomyelitis
Subungual squamous Cell Carcinoma
Common Hair follicle neoplasms in dogs
-Infundibular keratinizing acanthoma
-Trichoepithelioma
-Pilomatricoma
-Trichoblastoma
Rare hair follicle neoplasms in dogs
-malignant trichoepithelioma
-malignant pilomatricoma
What are these
Keratinocytes
Benign cystic neoplasm with differentiation to the squamous epithelium of the follicular isthmus.
Infundibular Keratinizing Acanthoma (IKA)
Sebaceous/modified sebaceous tumors
- Sebaceous gland
-Meibomian gland
-Hepatoid glands
senile nodular sebaceous hyperplasia that is very common in poodles and cocker spaniels. Not a papilloma but looks similar to one
Sebaceous gland Hyperplasia
A dog only neoplasm of adenomas often androgen mediated and presents more commonly in intact male dogs. Castration is recommended to prevent de-novo neoplasms
Hepatoid Gland Adenoma
Why are they called hepatoid glands?
Because the cells resemble hepatocytes
Apocrine adenomas form from what kind of glands?
Tubular glands
What are considered soft tissue sarcomas in dogs?
- Perivascular wall tumor
-Fibrosarcoma
-Liposarcoma
-Myxosarcoma
-Peripheral nerve sheath tumor
