Extrarenal nephroblastomas in the inguinal region and paraspinal musculature with vertebral involvement and spinal cord compression in a 12‐year‐old dog

Abstract

AbstractA 12‐year‐old, entire, male shar‐pei was presented with a 1‐month history of depression, lumbar pain and progressive hindlimb weakness. In addition, the owners had noticed a mass in the right inguinal region. Computed tomography showed a contrast‐enhanced soft tissue mass located at the right paraspinal musculature, affecting the vertebral body of T13, invading the vertebral canal and compressing the spinal cord. The inguinal mass showed similar imaging characteristics. Due to the uncertain prognosis, euthanasia was recommended, and postmortem examination was requested. Microscopic and immunohistochemical findings were consistent with ectopic nephroblastomas. According to this case report, ectopic nephroblastomas should be considered within the differential diagnosis of masses affecting the paraspinal musculature, as well as the inguinal region, even in senior dogs. To the authors’ knowledge, this is the first report of two ectopic nephroblastomas presented in different locations in a dog.