SCREENING FOR MULTIPLE ENDOCRINE NEOPLASIA SYNDROME (TYPE 1) IN PATIENTS WITH PRIMARY HYPERPARATHYROIDISM

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Abstract
In 63 consecutive patients with primary hyperparathyroidism (HPT) a prospective screening study was undertaken for coexistent multiple endocrine neoplasma‐(MEN)‐syndrome type 1. The screening consisted of a clinical examination, a radiological examination of the sella turcica with skeletal tomography (and in equivocal cases computed tomography), visual field examination by perimetry and a hormonal evaluation including measurements of the serum levels of prolactin, gastrin, pancreatic polypeptide (PP) and subunits of human chorionic gonadotrophin (HCG‐α and β). Clinical examination did not reveal any signs of endocrine disease suggestive of a MEN‐1 syndrome. In only one case there was a radiological abnormality of the sella turcica; this patient had an empty sella syndrome and a raised serum prolactin value. All other prolactin values were within the normal range. In 41% of the patients raised serum gastrin levels were found; these tended to normalize after parathyroidectomy. As a group, patients with raised gastrin values were older than the others and generally they had hypo‐ or achlorhydria. The serum PP levels were raised in 28% of the patients but there was no clinical evidence of a pancreatic tumour in any of these cases, and the serum HCG‐α and β levels were within the normal range in all patients but two. We conclude that the incidence of MEN‐1 syndrome in unselected patients with primary HPT must be low, and that investigations for this syndrome are justified only in HPT patients with specific symptoms or with a positive family history.