ABSTRACT
Diagnosis of a subcutaneous mass in a rabbit. Case report. A 3-years-old female mixed shorthair black and white rabbit. The rabbit was referred to the Small Animal Clinic, Faculty of Veterinary Medicine, University of Tehran, with a 1-month history of a cutaneous mass. Clinical examinations, radiography of thorax and ultrasonography of abdominal cavity was carried out. The mass was removed surgically. Clinical examinations revealed a well circumscribed subcutaneous mass on left gluteal region. Macroscopically the mass was solid, ovoid [1.6x1.3 x 0.6 cm] with reddish cut surface and flesh-like consistency. Histopathologic examination revealed prominent, oval, basophilic nuclei, with single scant nucleolus and eosinophilic cytoplasm. The tumor cells morphologically resembled the normal basal cells of the epidermis and showed no epidermal or adenexal differentiation. This is the firstreport of rabbit trichoblastoma from Iran, [basal cell tumor]