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Genetic approaches are therefore required in order to detect sex chromossomes abnormalities as variations in the number and structure of chromosomes, or the presence of a second cell line as mosaicim or chimerism.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Case presentation<\/jats:title>\n                <jats:p>A male Shorthair cryptorchid cat was presented with clinical signs of anorexia, tenesmus and hyperthermia. Ultrasonography revealed a fluid-filled structure, with approximately 1\u00a0cm in diameter, adjacent to the descending colon. Computed tomography evidenced a tubular structure, ventral to the descending colon and caudal to the bladder, which extended cranially, through two branches. Histopathological evaluation confirmed the presence of two atrophic uterine horns and one hypoplastic testicle with epididymis at the end of one of the uterine horns. The end of the other uterine horn was attached to a structure composed by a mass of adipocytes. Cytogenetic analysis revealed a mosaic 37,X\/38,XY karyotype. The two cell lines were found in 15% and 85% of the lymphocytes, respectively. Genetic analysis confirmed the presence of <jats:italic>SRY<\/jats:italic> and <jats:italic>ZFY<\/jats:italic> genes in blood and hair bulbs, and revealed a marked reduction in <jats:italic>SRY<\/jats:italic> expression in the testicle. Additionally, this case presented exceptionally rare features, such as a Leydig\u2019 cell tumour and a chronic endometritis in both uterine horns.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Complete imaging workup, cytogenetic analysis and <jats:italic>SRY<\/jats:italic> gene expression should be systematically realized, in order to properly classify disorders of sexual development (DSD) in cats.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12917-024-04164-y","type":"journal-article","created":{"date-parts":[[2024,7,6]],"date-time":"2024-07-06T06:01:59Z","timestamp":1720245719000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Unusual sex chromosomal DSD in a domestic Shorthair cat with a 37,X\/38,XY mosaic karyotype"],"prefix":"10.1186","volume":"20","author":[{"given":"L.","family":"Montenegro","sequence":"first","affiliation":[]},{"given":"I.","family":"Costa","sequence":"additional","affiliation":[]},{"given":"L.","family":"Maltez","sequence":"additional","affiliation":[]},{"given":"V.","family":"Evaristo","sequence":"additional","affiliation":[]},{"given":"I. 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