Bilateral ulnar retained cartilage cores causing thoracic angular limb deformities in a cat

Abstract

A 6‐month‐old, female, neutered, Bengal‐cross cat presented for bilateral thoracic angular limb deformity. Radiographs and computed tomography revealed well‐defined, flame‐shaped radiolucent and hypoattenuating defects within the medullary cavity of the distal ulnar metaphyses, surrounded by a thin rim of sclerosis. Surgical correction of initially the right angular limb deformity involved radial and ulnar ostectomies, and a bone biopsy of the distal ulnar metaphysis was submitted for histopathology. The morphological diagnosis was consistent with retained cartilage core, never previously reported in a cat.