Small Animal Dermatology, 3rd edition

CHAPTER 6 SYMPTOM CHECKER (LESIONAL AND REGIONAL DERMATOSES) 69

Nodular dermatofibrosis of German shepherd dogs

Benign nodular sebaceous hyperplasia

Skin tag/acrochordon

Nevi/hamartoma (collagenous, vascular, follicular, sebaceous)

Fibroadnexal dysplasia

Dermoid cyst/sinus

Cysts (follicular, epidermal, inclusion)

Lipomatosis

Apocrine cystomatosis.

 Neoplasm:
Round cell tumors: mast cell tumors, plasmacytomas, lymphomas, histiocy-

tomas, malignant histiocytosis, histiocytic sarcomas, transmissable venereal

tumors

Melanocytic tumors: benign dermal melanocytoma, malignant melanoma

Epithelial origin: squamous cell carcinoma, squamous papillomas, Bowenoid

carcinomain situ, basal cell tumor, keratoacanthoma, intracutaneous cornify-

ing epithelioma, trichoepithelioma, pilomatrixoma, sebaceous gland/hepatoid/

apocrine/ceruminous adenomas and carcinomas

Mesenchymal: hemangiopericytomas, schwannomas, fibroma/fibrosarcomas,

myxosarcoma, hemangioma/hemangiosarcomas, lymphangiomas/lymphangio-

sarcomas, lipomas/liposarcomas, fibropapilloma (feline sarcoid), leiomyosar-

coma, dermatofibroma.

Fig. 6.1.Demodicosis characterized by multifocal patches of partial to complete alopecia.