title: Can the early reduction of tumour markers predict outcome in surgically treated sporadic medullary thyroid carcinoma?
abstract: OBJECTIVE
  Patients with sporadic medullary thyroid carcinoma (MTC) have a variable clinical course. Our aim was to analyse the reduction of tumour markers after thyroidectomy with meticulous dissection and relate it to clinical outcome.
  
  
  METHODS
  Twenty consecutive patients with palpable sporadic MTC underwent thyroidectomy with central and uni- or bilateral modified radical neck dissection; three were subjected to mediastinal dissection. Basal (b-) and stimulated (s-) calcitonin (CT) and carcinoembryonic antigen (CEA)-levels were measured before and 6-8 weeks after primary surgery, and the reduction of these tumour markers was determined.
  
  
  RESULTS
  Median CT (b- and s-) were markedly reduced after surgery (98.5% and 99.1%, respectively), and CEA decreased 11 times. CT (b-) fell >99% in seven patients after surgery; in these and four additional patients, CT (s-) showed a similar reduction. During follow-up (median 52.5 months), two patients (stages IV B and C) died of MTC; they had <95% reduction of CT. Four patients (stage IV A) are alive with verified metastases. Eight patients (one stage III, seven stage IV A) are alive with hypercalcitoninemia. Five stages I-III patients and one stage IV A patient are disease-free.
  
  
  CONCLUSIONS
  Thyroidectomy and meticulous dissection caused a pronounced reduction of tumour markers. A postoperative reduction of CT (s-) >or=97% seems to be associated with less aggressive clinical course, while CEA had lower predictive value.
authors.affiliation: Department of Surgery, Sahlgrenska University Hospital, 41345, Gothenburg, Sweden. per.bumming@surgery.gu.se
authors.forename: Per
authors.initials: P
authors.lastname: Bümming
authors.forename: Håkan
authors.initials: H
authors.lastname: Ahlman
authors.forename: Bengt
authors.initials: B
authors.lastname: Nilsson
authors.forename: Ola
authors.initials: O
authors.lastname: Nilsson
authors.forename: Bo
authors.initials: B
authors.lastname: Wängberg
authors.forename: Svante
authors.initials: S
authors.lastname: Jansson
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000097:blood*; D001707:Biopsy, Needle; D002116:Calcitonin / Q000097:blood*; D002272:Carcinoembryonic Antigen / Q000097:blood*; D018276:Carcinoma, Medullary / Q000097:blood / Q000473:pathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D008207:Lymphatic Metastasis / Q000473:pathology; D008297:Male; D008875:Middle Aged; D037981:Neck Dissection; D009364:Neoplasm Recurrence, Local / Q000097:blood / Q000175:diagnosis; D009367:Neoplasm Staging; D018365:Neoplasm, Residual / Q000097:blood / Q000175:diagnosis; D009378:Neoplasms, Multiple Primary / Q000097:blood / Q000473:pathology / Q000601:surgery*; D011183:Postoperative Complications / Q000097:blood*; D011379:Prognosis; D013961:Thyroid Gland / Q000473:pathology; D013964:Thyroid Neoplasms / Q000097:blood / Q000473:pathology / Q000601:surgery*; D013965:Thyroidectomy
chemical_list: D014408:Biomarkers, Tumor; D002272:Carcinoembryonic Antigen; D002116:Calcitonin