Journal
REPRODUCTION IN DOMESTIC ANIMALS
Volume 58, Issue 3, Pages 459-464Publisher
WILEY
DOI: 10.1111/rda.14296
Keywords
granulosa cell tumour; llama; ovary
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This case report describes a llama with a granulosa cell tumor, which is hormonally active in camelids and presents with clinical features similar to other large animal species.
Hormonally active tumours are characterized by production and secretion of hormones, irrespective of endogenous feedback mechanisms. An adult llama had exuberant oestrous behaviour, infertility, elevated concentrations of oestradiol and a large ovarian mass. Necropsy revealed the presence of two large abdominal masses, one effacing the right ovary and one in the mesocolon. Considering the clinical and histopathological findings, we conclude that the llama was affected by a granulosa cell tumour. The case suggests that granulosa cell tumours in camelids are hormonally active, and the clinical presentation resembles that of other large animal species. To our knowledge, this is the first case report of an oestrogen-producing, metastatic granulosa cell tumour in a llama.
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