title: Multiple endocrine syndrome type IIb in early childhood.
abstract: A 3-week-old girl who was born with club feet had signs of failure to thrive. On physical examination the child appeared normal; she had no abnormalities in the mucous membranes of the mouth, the eyelids, or in the neck, and her other systems, including heart, chest, abdomen, and neurologic systems, were clinically normal. Radiologically, the gastrointestinal tract was normal, but rectal biopsy showed neuromas. Her serum calcitonin level was measured both at basal and after pentagastrin stimulation at 5 weeks of age and found to be high, but whether it was consistent with the normal level at this early age or was caused by medullary thyroid carcinoma was not clear. At 3 months, the corneal nerves of both eyes were examined and showed considerable thickening, and multiple endocrine syndrome type IIb was suspected. The serum calcitonin level at 8 and 14 months was increased. A total thyroidectomy was done, and C-cell nodular hyperplasia and adenomatosis was found in the isthmus. The postoperative serum calcitonin level decreased to low normal and did not increase after pentagastrin stimulation. To the authors' knowledge, this case represents the youngest patient diagnosed with multiple endocrine syndrome type IIb in the absence of family history of the disease.
authors.affiliation: Section of Endocrinology, University of Texas M. D. Anderson Cancer Center, Houston 77030.
authors.forename: N A
authors.initials: NA
authors.lastname: Samaan
authors.forename: M B
authors.initials: MB
authors.lastname: Draznin
authors.forename: R E
authors.initials: RE
authors.lastname: Halpin
authors.forename: R S
authors.initials: RS
authors.lastname: Bloss
authors.forename: E
authors.initials: E
authors.lastname: Hawkins
authors.forename: R A
authors.initials: RA
authors.lastname: Lewis
mesh_terms: D002116:Calcitonin / Q000378:metabolism*; D002277:Carcinoma / Q000378:metabolism*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D009384:Paraneoplastic Endocrine Syndromes / Q000175:diagnosis*; D013964:Thyroid Neoplasms / Q000378:metabolism*
chemical_list: D002116:Calcitonin