Unusual presentation of a metastatic uveal melanoma in a cat

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A 10 year-old, spayed female Domestic Short-Haired (DSH) cats was diagnosed with a large primary uveal melanoma and exenteration was recommended. Thoracic radiographs, abdominal ultrasonography, and complete blood count and serum biochemistry panel did not reveal any abnormality compatible with metastatic disease and surgery was performed. Histopathologic study of the eye confirmed a diffuse iris melanoma. Five months later, the cat presented with a lameness of the right anterior extremity. On physical exam the right elbow was swollen and painful. Radiographs showed a severe osteolysis of the radial head and proximal diaphysis. Fine needle aspiration of the radius head identified a round cell neoplasm with scattered cells containing intracytoplasmatic pigmented granules, compatible with metastatic melanoma. The owners decided not to treat the patient with chemotherapy and declined a biopsy. Two months later, the cat died and necropsy was performed confirming bone metastasis of the uveal melanoma. A diagnosis of generalized metastasis from primary diffuse iris melanoma was made. This report describes, for the first time, long bone metastasis from an uveal melanoma in a cat. © 2010 American College of Veterinary Ophthalmologists.
Original languageEnglish
Pages (from-to)391-394
JournalVeterinary Ophthalmology
Issue number6
Publication statusPublished - 1 Nov 2010


  • Bone
  • Exenteration
  • Feline
  • Metastasis
  • Ocular tumor
  • Uvea


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