Trichogranuloma is characterized by a foreign body-type granulomatous inflammatory process resulting from the presence of hair fragments in the dermis. We report a case of a two-year-old male cat, presenting pain and an increase in volume in the right pelvic limb. Physical examination revealed a nodular lesion that drained a purulent secretion. The diagnosis of trichogranuloma was made based on clinical findings and histological changes. Trichogranulomas are rare in animals and humans; they are usually an occupational disease of hairdressers. Therefore, this condition must enter into the differential diagnosis of other granulomatous diseases in cats, such as infection by Mycobacterium spp. and Nocardia spp., among others.
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