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Updated: Jun 5, 2026

A Modified Co-Culture System for Understanding Granulosa-Theca Cell Interactions in the Bovine Ovary
Published on: September 19, 2025
Granulosa theca cell tumor with erythrocytosis in a llama
David E Anderson1, C Guillermo Couto, Michael Oglesbee
1Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, 43210, USA. danderso@vet.k-state.edu
Abstract:
A 2.5-year-old, female llama with weight loss and lethargy had a packed cell volume (PCV) of 45% which increased to 57% over 3 wk. Transrectal ultrasonography revealed a mass of mixed echogenicity involving the right ovary, which was removed. A histopathological diagnosis of granulosa theca cell tumor was made. This is the first report of its kind in a llama.
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