Osteoblastoma in the Distal Humerus of a Cat

A 7-year-old neutered male domestic shorthair cat was presented with chronic lameness in the right forelimb. A cystic bony lesion was identified in the distal right humerus and amputation was performed. The epiphyseal trabecular bones of the capitulum and trochlea was replaced by a tan to pink, expa...

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Bibliographic Details
Published in:Journal of comparative pathology 2019-10, Vol.172, p.27-30
Main Authors: Kirk, N.M., Vieson, M.D., Sullivan, D.R., Pool, R.R.
Format: Article
Language:English
Subjects:
Animals
benign bone tumour
cat
Cat Diseases - pathology
Cat Diseases - surgery
Cats
Diagnosis, Differential
Humerus - pathology
Humerus - surgery
Male
Neoplasms, Bone Tissue - diagnosis
Neoplasms, Bone Tissue - surgery
Neoplasms, Bone Tissue - veterinary
osteoblastoma
Osteoblastoma - diagnosis
Osteoblastoma - pathology
Osteoblastoma - surgery
osteoid osteoma
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Description
Summary:A 7-year-old neutered male domestic shorthair cat was presented with chronic lameness in the right forelimb. A cystic bony lesion was identified in the distal right humerus and amputation was performed. The epiphyseal trabecular bones of the capitulum and trochlea was replaced by a tan to pink, expansile mass that was surrounded by a thin rim of cortical bone. Microscopically, the tumour was composed of a bland, osteoid producing spindle cell population within a well-vascularized fibrous stroma. Radiographical and histological features were consistent with osteoblastoma. Osteoblastoma and the related osteoid osteoma are uncommon, benign osteoblastic tumours that are reported rarely in animals. These tumours should be considered as differential diagnoses for slow growing, cystic bony lesions in cats.
ISSN:0021-9975
1532-3129
DOI:10.1016/j.jcpa.2019.08.007