title: Subclinical hypothyroidism following hemithyroidectomy: a simple risk-scoring system using age and preoperative thyrotropin level.
abstract: Hypothyroidism can be a complication after a hemithyroidectomy. The aim of this study was to determine the incidence and risk factors of hypothyroidism after a hemithyroidectomy. We also recommend a risk-scoring system that can predict post-hemithyroidectomy hypothyroidism before surgery. Among 260 patients who underwent hemithyroidectomy from January to June 2005, a total of 233 were euthryoid preoperatively and were followed for more than 3 years. Biochemical subclinical hypothyroidism developed in 57 patients (24.4%). Patients who developed postoperative hypothyroidism showed higher preoperative thyroid stimulation hormone (TSH) levels and older age. A risk-scoring system was calculated by summing the score of these 2 factors (preoperative TSH level and age). The incidences of hypothyroidism were 3, 20, 39, and 70% according to the risk scores of 0, 1, 2 and 3, respectively. Potential risk of postoperative hypothyroidism should be discussed with patients before surgery.
authors.affiliation: Kuma Hospital, Kobe, Japan. tomoda@kuma-h.or.jp
authors.forename: Chisato
authors.initials: C
authors.lastname: Tomoda
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Ito
authors.forename: Kaoru
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Akihiro
authors.initials: A
authors.lastname: Miya
authors.forename: Akira
authors.initials: A
authors.lastname: Miyauchi
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007037:Hypothyroidism / Q000097:blood / Q000175:diagnosis / Q000453:epidemiology*; D015994:Incidence; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000097:blood / Q000175:diagnosis / Q000453:epidemiology*; D011300:Preoperative Care; D012189:Retrospective Studies; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D013965:Thyroidectomy / Q000009:adverse effects* / Q000379:methods*; D013972:Thyrotropin / Q000097:blood*
chemical_list: D013972:Thyrotropin