Sclerosing hemangioma mandibular in Paralichthys orbignyanus: case report

ABSTRACT In this study, we described the first case of sclerosing haemangioma in an adult Brazilian flounder Paralichthys orbignyanus. Produced by artificial reproduction, the fish was approximately 10 years old and was maintained at a breeding stock. When removed from the tank, mandibular lesion with excoriations and hemorrhagic foci were noted. Tumor samples were collected from the mandible for histopathological analysis. Proliferation of numerous blood vessels surrounded by dense connective stroma was observed microscopically. The etiology of this neoplasia is unknown, but the fact that the specimen remained in captivity for many years, may have contributed to the appearance of this type of lesion, due to sporadic mechanical shocks to the tank wall.

摘要 本研究首次报道了1例发生于成年巴西奥氏牙鲆（Paralichthys orbignyanus）体内的硬化性血管瘤（sclerosing haemangioma）病例。该个体为人工繁育所得，年龄约10岁，饲养于种鱼种群中。当其从养殖缸中移出时，可见其下颌存在伴有表皮剥脱与出血灶的病变。研究人员从其下颌部位采集肿瘤样本以开展组织病理学分析（histopathological analysis）。显微镜下可见大量血管增生，周围环绕致密结缔组织间质（dense connective stroma）。目前该肿瘤的病因尚未明确，但该样本长期处于圈养环境，且可能因频繁遭受养殖缸壁产生的零星机械冲击，或为该类病变发生的诱因。