PMID: 686900Sep 1, 1978Paper

Medullary thyroid carcinoma: relationship of method of diagnosis to pathologic staging

Annals of Surgery
S A WellsC W Cooper


Medullary thyroid carcinoma (MTC) develops in virtually all patients affected with multiple endocrine neoplasia type II (MEN II), a disease inherited as an autosomal dominant trait. The thyroid tumor cells secrete calcitonin (CT) and the detection of elevated plasma levels (>300 pg/ml) of this hormone in MEN II kindred members strongly suggests the presence of MTC even though it may not be evident clinically. Intravenously administered calcium ion (Ca(++)) and pentagastrin (Pg) are potent CT secretagogues which are of particular value in establishing the early diagnosis of MTC. In evaluating seven kindreds with MEN II, we detected 90 patients with MTC. Depending on the method of diagnosis, they could be divided into three categories: Group 1; patients with no clinical evidence of MTC whose undetectable basal plasma calcitonin levels became elevated following intravenous Ca(++) or Pg, Group II; patients with no clinical evidence of MTC who had elevated basal plasma CT levels, and Group III; patients with clinically evident MTC. At the time of diagnosis of MTC, the patients in Group I were younger (20.5 +/- 1.9 years) than the patients in Group II (32.5 +/- 4.7 years, p < 0.005) and Group III (34.3 +/- 2.0, p < 0.00005). The inci...Continue Reading


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