{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T15:25:07Z","timestamp":1767626707311,"version":"3.41.2"},"reference-count":33,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2023,3,3]],"date-time":"2023-03-03T00:00:00Z","timestamp":1677801600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Pediatr."],"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>The clinical characteristics of Ulnar-mammary syndrome (UMS) caused by mutations in <jats:italic>TBX3<\/jats:italic> (T-Box transcription factor 3) were studied and the correlation between genotype and clinical phenotype were analyzed to improve awareness and early diagnosis of the disease.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The clinical data of a boy aged 13 years and 5 months with left forearm deformity and growth retardation as the main features were analyzed. Genomic exon detection was performed, and the results were verified by Sanger sequencing. Simultaneously, we performed literature review to analyze the correlation between clinical phenotypes and genotypes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The clinical manifestations in the child were short stature, ulnar hypoplasia of the forearm, hypohidrosis, retracted nipple, micropenis, and cryptorchidism. Laboratory examination revealed hyperthyroidism, growth hormone deficiency, and hypogonadotropic hypogonadism. Imaging results displayed delayed bone age, small pituitary gland, and persistence of Rathke's cleft cyst. The results of the exome sequencing revealed the deletion of AGA at positions 1121\u20131,124 of <jats:italic>TBX3<\/jats:italic>, which resulted in a frameshift mutation (c.1121\u20131124del AGAG; pGlu374fs). According to the American College of Medical Genetics (ACMG) assessment, the mutation is a pathogenic variant. A definitive diagnosis of UMS was made on the basis of the clinical phenotype of the patient. The Chinese and English literature were reviewed to analyze the correlation between <jats:italic>TBX3<\/jats:italic> genotype and clinical phenotype.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>UMS is a rare hereditary disease caused by mutations in <jats:italic>TBX3<\/jats:italic>. There is significant clinical heterogeneity associated with the variants of this gene. To our knowledge, this mutation site in <jats:italic>TBX3<\/jats:italic> has been reported for the first time, thereby expanding the mutation spectrum of this gene.<\/jats:p><\/jats:sec>","DOI":"10.3389\/fped.2023.1052931","type":"journal-article","created":{"date-parts":[[2023,3,3]],"date-time":"2023-03-03T05:28:24Z","timestamp":1677821304000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Literature review, report, and analysis of genotype and clinical phenotype of a rare case of ulnar-mammary 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