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Cancer registries are important tools for cancer surveillance. Brazil created the first Animal Cancer Registry in South America in 2013.[3] In Portugal, a system for collecting data was recently created: the Vet-OncoNet.[4] In Spain, the first national pet cancer registry project is currently being constructed at the School of Veterinary Sciences of the University of Las Palmas de Gran Canaria. 8 Boo G, Leyk S, Fabrikant SI, Pospischil A. Graf R Assessing effects of structural zeros on models of canine cancer incidence: a case study of the Swiss Canine Cancer Registry. [Extracted from the article]

Thyroid tissue in teleosts is located mainly in the pharyngeal region, usually reaching other adjacent anatomical locations. Herein, a nodular lesion located in the left operculum of a Senegal seabream (Diplodus bellottii) was surgically excised and sent for microscopical evaluation. Microscopically, the lesion presented irregular borders and consisted in columnar epithelial cells arranged in a tubulopapillary pattern, surrounding a central lumen filled with acellular, acidophilic and homogeneous, material (‘colloid’). To determine the lesion's histogenesis, immunohistochemistry was performed employing antibodies for AE1/AE3, CK7, thyroglobulin and vimentin. The neoplastic cells presented low mitotic index and positive immunolabelling for CK7 and thyroglobulin. Therefore, a diagnosis of ectopic thyroid adenoma was made. Herein, the successful employment of antibodies classically used in mammals for accurate diagnosis of thyroid disorders is described. Proliferation of thyroid tissue in fish may reflect environmental and physiological imbalances, making the study and correct diagnosis of these tumours in this species important. [ABSTRACT FROM AUTHOR]