Spontaneous multi-cystic peripheral ameloblastoma in the freshwater angelfish, from the Brazilian state of Pará

Videira, Marcela Nunes; Velasco, Michele; Tortelly, Rogério; Clemente, S.C. São; Matos, Patrícia; Sanches, Osimar de Carvalho; Matos, Edílson

doi:10.1590/1678-4162-7736

Cited by 2 publications

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References 7 publications

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“…Studies on oral tumours in fish are very scarce (Schlumberger & Lucke 1948, Gopalakrishnan et al 2011, Vijayakumar et al 2014, although some spontaneous oral tumours have been reported (Honma et al 2003, Grim et al 2009, Coffee et al 2013, Videira et al 2015. Gopalakrishnan et al (2011) and Vijayakumar et al (2014) reported intra-oral sarcomas and compound odontomas in Sphyraena barracuda and S. jello in India.…”

Section: Discussionmentioning

confidence: 99%

“…In fish, oral tumours (i.e. odontomas, ameloblastomas, papillomas and fibromas) have been reported in Melanogrammus aeglefinus (Thomas 1926), Oncorhynchus tsha wyt scha (Schlumberger & Katz 1956, Stolk 1957, Stock ley 1975, Grim et al 2009), Sparus aurata (Harshbarger 1974, Easa & Faisal 1987, Tautogolabrus adsphersus (Harsh barger 1974), Cyprinodon variegatus variegatus (Martineau et al 1990), Alcichthys elongatus (Honma et al 2003), Carcharias taurus, Prionace glauca (Boru cins ka et al 2004), Sphyraena barracuda (Gopalakrishnan et al 2011), Sander vitreus (Coffee et al 2013), Sphyraena jello (Vijayakumar et al 2014), Pterophyllum scalare (Videira et al 2015) and Carcharodon carcharias (Huveneers et al 2016). However, odontomas, myxomas and psammomatoid ossifying fibromas are rare tumours in fish.…”

Section: Introductionmentioning

confidence: 99%

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Oral neoplasms in pickhandle barracuda Sphyraena jello from India

Singaravel

Gopalakrishnan²,

Raja³

et al. 2017

Dis. Aquat. Org.

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We report the spontaneous occurrence of oral neoplasms in pickhandle barracuda Sphyraena jello Cuvier, 1829 from Parangipettai, on the southeast coast of India. A total of 11736 fish were examined, of which 43 were affected with oral tumours, with an overall prevalence of 0.37%. Gross and clinical symptoms included reddish to grayish-white distended tumourous growths on the gingiva, intra-oral bones and tongue. The tumours exhibited delayed eruption and intra-or extra-oral swelling, varied in consistency from extremely firm to fleshy and released mucinous material. The majority of tumours consisted of numerous clumped toothlets, but some included hardened tissues. Local area invasion/transmission was observed in most cases; however, necropsy examination revealed no gross evidence of distant metastasis into visceral organs. Radiographic examination of compound odontomas revealed distinct unilocular radio-opaque minitoothlets surrounded by defined radiolucency, whereas complex odontomas exhibited unilocular and indistinct radio-opaque masses within a much more extensive radiolucent zone. Histopathologically, the intra-oral tumour lesions were characterized by numerous imperfect (germ) toothlets consisting of a disorganized combination of dental tissues: pulp tissues with manifested and predominantly mixed hard dental tissues of immature dentine and enamel, numerous small to large and round to polyhedral ossicles embedded in hypocellular fibrous stromal tissues and sparsely spaced bland spindloid cells with cleft-like spaces of loose mucoid stroma. Histochemically, the neoplastic lesions stained positive for periodic acid-Schiff and Masson's trichrome. Based on the clinical and histological findings, the tumours were diagnosed as compound odontomas, complex odontomas, odontogenic myxomas, lingual myxomas and psammomatoid ossifying fibromas.

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