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Macroscopic and Microscopic study of mucocutaneous papilloma in gold spot plecostomus (Pterygoplichthys joselimaianus)
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Hooman Rahmati-Holasoo *   , Sara Shokrpoor , Samansa Salehi |
| Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran |
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Abstract: (211 Views) |
| Papillomas are among the most frequently reported benign epidermal tumors in fish and are characterized by proliferative epithelial growth. This study describes the clinical, macroscopic, and histopathological features of a mucocutaneous papilloma in a gold spot plecostomus (Pterygoplichthys joselimaianus). The fish was referred to a veterinary clinic due to the presence of a raised, cauliflower-like mass located at the mucocutaneous junction of the upper lip. Following anesthesia, clinical examination and parasitological assessment of the skin and gills were performed, and no parasitic infection was detected. The mass was surgically excised and fixed in 10% neutral buffered formalin for histopathological evaluation. Microscopic examination revealed papillary epithelial hyperplasia with proliferative epidermal projections supported by connective tissue stroma, consistent with papilloma. According to follow-up information provided by the owner, no recurrence was observed during the 4-month postoperative period, and the fish remained in good general condition. Although the etiology of papillomas in fish remains unclear, viral agents, environmental stressors, and water quality disturbances have been proposed as possible contributing factors. This report adds to the limited documentation of neoplastic diseases in ornamental catfish species. |
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| Keywords: Pterygoplichthys joselimaianus, Papilloma, Ornamental fish, Histopathology, Fish neoplasia. |
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Full-Text [PDF 550 kb]
(68 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2026/01/4 | Accepted: 2026/03/30 | Published: 2026/05/30
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