title: Gynaecomastia as a presenting feature of thyrotoxicosis.
abstract: The association between gynaecomastia and thyrotoxicosis is well recognised. However, the reported frequency of the association is variable, partly depending upon the defining criteria used. Here we report two patients with thyrotoxicosis in whom gynaecomastia was the presenting feature. Both patients had other contributing factors, which are assumed to have predisposed to gynaecomastia. In both patients, the gynaecomastia resolved with successful treatment of the thyrotoxicosis. When gynaecomastia is a presenting, or prominent feature of thyrotoxicosis, the possibility of additional underlying pathology should be considered.
authors.affiliation: Department of Medicine and Therapeutics, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, NT, Hong Kong.
authors.forename: W B
authors.initials: WB
authors.lastname: Chan
authors.forename: V T
authors.initials: VT
authors.lastname: Yeung
authors.forename: C C
authors.initials: CC
authors.lastname: Chow
authors.forename: W Y
authors.initials: WY
authors.lastname: So
authors.forename: C S
authors.initials: CS
authors.lastname: Cockram
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D012739:Gonadal Steroid Hormones / Q000097:blood; D006177:Gynecomastia / Q000097:blood / Q000188:drug therapy / Q000209:etiology*; D006801:Humans; D008297:Male; D013971:Thyrotoxicosis / Q000097:blood / Q000150:complications*
chemical_list: D015415:Biomarkers; D012739:Gonadal Steroid Hormones