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Peer-reviewed veterinary case report

Chronic expanding blood clot in a cat's hind leg after injection

By Togni, Andrea et al.·Published in Journal of feline medicine and surgery·2015·Clinic for Small Animal Surgery·View original on PubMed

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Original publication title: Chronic expanding haematoma in a cat.

Species:
cat

Plain-English summary

A 5-year-old cat developed a recurring swelling in the right hind leg after getting an injection. The owner tried using cold packs and a bandage, but the swelling kept coming back. After further testing, a large abnormal growth was found and surgically removed. Thankfully, the cat did not have any more issues during a five-month follow-up, and the growth was identified as a chronic expanding haematoma, which is a type of blood-filled swelling.

People also search for: cat leg swelling after injection · cat haematoma treatment · why does my cat have a lump on its leg

Abstract

A 5-year-old cat developed a recurrent haematoma in the right hindlimb after receiving an intramuscular injection. Cold packs and a compressive bandage were applied without success. The haematoma resolved initially but recurred twice within a week after conservative treatment. Contrast computed tomography was performed after the second recurrence. A large cavernous lesion was found craniolateral to the right stifle. The lesion was removed surgically. No recurrence occurred during a 5 month follow-up. On histopathology the lesion was characterised as a chronic expansive haematoma. To our knowledge, this type of lesion has not previously been described in a small animal.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/25228168/