title: A case of TSH-producing adenoma treated with octreotide in combination with thiamazole for the control of TSH and thyroid hormones after trans-sphenoidal neurosurgery.
abstract: While TSH-producing adenoma (TSHoma) is rare, the diagnosis is often delayed because the clinical features are heterogeneous. The patient was a 69-year-old woman who had been referred to the Yachiyo Medical Center in August 2008, because of dyspnea, loss of appetite, weight loss of 10 kg, and diarrhea that lasted 4 years. We diagnosed this patient with pituitary TSH-producing macroadenoma. Thyroid hormone concentration was increasing although the serum TSH level was within a normal range after trans-sphenoidal surgery. We considered that because of enlargement of the thyroid gland due to long-term stimulation by TSH, a low concentration of TSH could stimulate the thyroid gland to produce excess T3 or T4. The somatostatin analogue, octreotide was used to control the TSHoma and serum TSH concentration but not thyroid hormone. The octreotide in combination with thiamazole treatment for 14 months controlled thyroid hormone concentration and decreased the thyroid mass, and ultimately, the thiamazole could be stopped. To date, the use of combination therapy of octreotide with thiamazole in patients with remaining TSH-producing adenoma without Basedow's disease is rare, and we suggest that this treatment is one of the therapeutic means to treat recurrence of TSH-producing adenoma after surgery with progressive complications or large thyroid gland.
authors.affiliation: Department of Diabetes, Endocrine and Metabolic Diseases, Tokyo Women's Medical University, Yachiyo Medical Center, Yachiyo 276-8524, Japan.
authors.forename: Sayaka
authors.initials: S
authors.lastname: Fukushima
authors.forename: Masaki
authors.initials: M
authors.lastname: Takahashi
authors.forename: Chihiro
authors.initials: C
authors.lastname: Yoneda
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Matsuura
authors.forename: Takenori
authors.initials: T
authors.lastname: Haruki
authors.forename: Jun
authors.initials: J
authors.lastname: Ogino
authors.forename: Minako
authors.initials: M
authors.lastname: Koike
authors.forename: Osami
authors.initials: O
authors.lastname: Kubo
authors.forename: Takakazu
authors.initials: T
authors.lastname: Kawamata
authors.forename: Naotake
authors.initials: N
authors.lastname: Hashimoto
mesh_terms: D000236:Adenoma / Q000175:diagnosis* / Q000188:drug therapy; D000368:Aged; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D008713:Methimazole / Q000008:administration & dosage*; D015282:Octreotide / Q000008:administration & dosage*; D010911:Pituitary Neoplasms / Q000175:diagnosis* / Q000188:drug therapy; D013972:Thyrotropin / Q000096:biosynthesis* / Q000097:blood
chemical_list: D008713:Methimazole; D013972:Thyrotropin; D015282:Octreotide