title: [Hypogonadism despite of normal testosterone levels].
abstract: We report on a 19 year old patient with clinical signs of hypogonadism (small testicles, missing pollutions and diminished beard growth) despite of normal testosterone levels. Further diagnostic procedures revealed panhypopituitarism with insufficiency of the gonadotrope, somatotrope and corticotrope axis due to a beta-HCG-producing suprasellar germinoma with intracerebral metastases. Paraneoplastic production of beta-HCG resulted in sufficient stimulation of Leydig cells with normal production of testosterone, which had partly masked clinical symptoms of gonatrope insufficiency. The patient was treated by combined radiochemotherapy and is in remission since 7 years.
authors.affiliation: Medizinische Klinik und Poliklinik, Universitätsklinikum Charité Campus Mitte, Berlin. Juergen.Bauditz@charite.de
authors.forename: J
authors.initials: J
authors.lastname: Bauditz
authors.forename: M
authors.initials: M
authors.lastname: Ventz
authors.forename: F
authors.initials: F
authors.lastname: van Landeghem
authors.forename: H
authors.initials: H
authors.lastname: Lochs
mesh_terms: D000328:Adult; D000469:Alkaline Phosphatase; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D014408:Biomarkers, Tumor / Q000097:blood; D001706:Biopsy; D001932:Brain Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000556:secondary* / Q000628:therapy; D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood*; D003131:Combined Modality Therapy; D016371:Cranial Irradiation; D003919:Diabetes Insipidus / Q000097:blood / Q000209:etiology*; D003937:Diagnosis, Differential; D003952:Diagnostic Imaging; D005500:Follow-Up Studies; D058851:GPI-Linked Proteins; D018237:Germinoma / Q000175:diagnosis / Q000473:pathology / Q000556:secondary* / Q000628:therapy; D006801:Humans; D007006:Hypogonadism / Q000097:blood / Q000209:etiology*; D007018:Hypopituitarism / Q000097:blood / Q000209:etiology*; D007527:Isoenzymes / Q000097:blood; D008297:Male; D009384:Paraneoplastic Endocrine Syndromes / Q000097:blood / Q000209:etiology*; D010902:Pituitary Gland / Q000473:pathology; D010911:Pituitary Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy; D013739:Testosterone / Q000097:blood*
chemical_list: D014408:Biomarkers, Tumor; D018997:Chorionic Gonadotropin, beta Subunit, Human; D058851:GPI-Linked Proteins; D007527:Isoenzymes; D013739:Testosterone; D000469:Alkaline Phosphatase; C019839:alkaline phosphatase, placental