A 12-year-old domestic short-haired cat was referred for evaluation of periocular masses.
The tail had similar masses and was amputated previously by the referring veterinarian.
On examination, multiple pigmented nodules, 3–15 mm in diameter, were found in the
periocular skin, primarily involving the palpebral eyelid margin.Awedge excisional biopsy
revealed small cuboidal cells forming multiple tubular and cystic structures indicative
of apocrine cystadenomas, similar to apocrine hidrocystomas described in humans. The
nodules were lanced followed by liquid nitrogen cryofreezing.