Image Quiz: A cat with a large tail mass

Image Quiz: A cat with a large tail mass



This two-year-old spayed female cat was presented for evaluation of a large (4- x 4.5- x 5.4-cm) tail mass. On palpation, the mass felt turgid and hot, appeared to be causing pain, and had serosanguineous discharge (see photo above). Radiographs revealed a large soft tissue swelling with lysis of caudal coccygeal vertebral bodies (see photo below).

An excisional biopsy, which was palliative, provided a large sample for histopathologic examination. Representative immunohistochemistry fields from the sample are shown below.


What's your diagnosis?

a) Abscess

b) Synovial cell sarcoma

c) Leiomyosarcoma

d) Rhabdomyosarcoma

More Image Quizzes

Equine Image Quiz: A large, ulcerated abdominal lesion

The itchy, growing wound also contains small, gritty masses. What is the most likely diagnosis?

Image Quiz: A recurrent, painful ear infection

Can you correctly identify the underlying invader in this dog’s smelly, painful ear? Take this image quiz (sponsored by Bayer) and find out.

Image Quiz: Are you a veterinary anatomy genius?

Test your memory of anatomical features with these fun, brightly colored study tools.