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Peer-reviewed veterinary case report

Horse with heart mass - what is an infiltrative lipoma?

By Baker, D & Kreeger, J·Published in The Cornell veterinarian·1987·Department of Veterinary Pathology·View original on PubMed

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Original publication title: Infiltrative lipoma in the heart of a horse.

Species:
horse

Plain-English summary

A 3-year-old male Morgan horse was found to have a large, soft, yellow mass in the wall of the right side of its heart during a post-mortem examination. This mass was made up of fat cells that were growing in a way that invaded the surrounding heart muscle, causing some damage to the muscle fibers. The condition was diagnosed as an infiltrative lipoma, which is a type of fatty tumor that can spread into nearby tissues. Unfortunately, since this was discovered after the horse had passed away, there was no treatment or outcome to report.

Abstract

An expansile, yellow, soft mass was observed in the free wall of the right ventricle of a 3-year-old, male, Morgan, horse at necropsy. The mass was composed of well differentiated adipocytes in solid sheets or infiltrating between muscle fibers with associated myofiber degeneration. The mass was interpreted to be an infiltrative lipoma of the heart.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/3677709/