A pseudocystic lipoma in the European eel (Anguilla anguilla)

Abstract

This is the first report of lipoma in the European eel Angudla an udla. In a single eel that was obtained from a polyculture fish farm in northern Egypt, a yellowish swelfing (10 mm in diameter) was observed near the ti of the lower lip. The tumor was composed of mature Iipocytes that occasionally fused into an unlinelcystic space. Resume Une Lipome Pseudocystique chez l'anguille europeine (Anguilla anguilkz)C'est le premier rapport d'un lipome chez I'anguille europetne Anguilla anguilla. Dans une seule anguille qui fut obtenut dam une ferme polyculture de poisson en kgypte du nord, une masse jeune (10 mm de diametre) fut o b s e d e pres de l'extrtmite de la levre inftrieure. La tumuear A t composte de lipocite mature qui occasionellement out fait fusion avec un espace cysrique a c e h e .

Invasion of melanoma to angiolipoma in a male Siamese fighting fish, Betta splendens, Regan

“…Capillaries were observed between the fat cells of hypodermal lipoma in a striped mullet, M. cephalus , and multicentric lipoma in a molly, P. velifera , but vascularization were not prominent to be diagnosed as a angiolipoma (Easa et al . ; Stefano et al . ).…”

“…), European eel, Anguilla anguilla (L.) (Easa, Harshbarger & Hetrick ; Easa et al . ), striped mullet, Mugil cephalus (L.) (Easa et al . ,b), common dab, Limanda limanda (L.) (Bruno, McVicar & Fraser ), striped seabream, Lithognathus mormyrus (L.) (Volpatti et al .…”

“…), striped mullet, Mugil cephalus (L.) (Easa et al . ,b), common dab, Limanda limanda (L.) (Bruno, McVicar & Fraser ), striped seabream, Lithognathus mormyrus (L.) (Volpatti et al . ), northern bluefin tuna, Thunnus thynnus (L.) (Marino et al .…”

“…The aetiology of lipoma development is unknown, and errors in fat metabolism, endocrine or neurological disorders (Easa et al . ,b) and dysraphic status of bone as a possible predisposing factor in fish (when lipomas arise close to the bone) (Marino et al . ) have been proposed as possible causes.…”

“…Lipomas are mesenchymal and benign neoplasms arising of mature adipocytes. Lipomas have been reported from a number of fish species including bream, Abramis brama (L.) (Mawdesley-Thomas & Bucke 1968), largemouth bass, Micropterus salmoides (Lacep ede), (Mawdesley-Thomas 1972), black crappie, Pomoxis nigromaculatus (Lesueur) (Harshbarger 1972), southern bluefin tuna, Thunnus maccoyii (Castelnau) (Lester & Kelly 1983;Johnston et al 2008), channel catfish, Ictalurus punctatus (Rafinesque) (McCoy et al 1985), European eel, Anguilla anguilla (L.) (Easa, Harshbarger & Hetrick 1989b;Easa et al 1989a), striped mullet, Mugil cephalus (L.) (Easa et al 1989a,b), common dab, Limanda limanda (L.) (Bruno, McVicar & Fraser 1991), striped seabream, Lithognathus mormyrus (L.) (Volpatti et al 1998), northern bluefin tuna, Thunnus thynnus (L.) (Marino et al 2006), European seabass, Dicentrarchus labrax (L.), (Marino et al 2011) and molly, Poecilia velifera (Regan), (Stefano et al 2012). Chromatophoromas or pigment cell tumours are common tumours in fish, and outbreaks have been reported in both marine and freshwater fish throughout the world (Okihiro et al 1993;Ramos, Victor & Branco 2013).…”