Multiple trichoblastomas in a dog.
BACKGROUND
Hair follicle tumours generally present as benign, solitary masses and have a good prognosis following surgical resection.


OBJECTIVE
This report describes a case of multiple trichoblastomas in a dog.


METHODS
A 2-year-old crossbred dog presented with multiple soft cutaneous periocular, perilabial, submandibular and nasal nodules, between 2 and 9 cm in diameter, located on the right side of the face. New nodules were observed on the same side of the face at a second consultation 3 weeks later.


METHODS
Surgical resection of all nodules was performed in two procedures. Three nodules were initially resected and submitted for histolopathology and immunohistochemistry. The diagnosis was trichoblastoma for all three. At the time of the second consultation, new and remaining nodules were biopsied and the diagnosis of trichoblastoma confirmed. The dog was treated with doxorubicin and piroxicam for 30 days prior to the second surgical procedure in an attempt to reduce new tumour growth and the size of present tumours. All nodules were resected and the defects closed using rotation flaps.


RESULTS
No recurrence of the neoplasm was noted within 10 months after surgery.


CONCLUSIONS
Trichoblastomas are generally benign but can present as multiple neoplasms that may require surgical resection and may respond to chemotherapy. To the authors' knowledge, this is the first report of multiple trichoblastomas in a dog.
Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil.
Andressa G
AG
Campos
Bruno
B
Cogliati
Juliana M
JM
Guerra
Julia M
JM
Matera
D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use; D000903:Antibiotics, Antineoplastic / Q000627:therapeutic use; D004283:Dog Diseases / Q000175:diagnosis / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D004285:Dogs; D004317:Doxorubicin / Q000627:therapeutic use; D018859:Hair Follicle / Q000473:pathology*; D008297:Male; D010894:Piroxicam / Q000627:therapeutic use; D012878:Skin Neoplasms / Q000188:drug therapy / Q000473:pathology / Q000601:surgery / Q000662:veterinary*
D000894:Anti-Inflammatory Agents, Non-Steroidal; D000903:Antibiotics, Antineoplastic; D010894:Piroxicam; D004317:Doxorubicin