Treatment of ECL cell carcinoids with octreotide LAR

Scandinavian Journal of Gastroenterology
Vidar FykseH L Waldum

Abstract

Patients with chronic atrophic gastritis (CAG) and hypergastrinaemia are at risk of developing hyperplasia of the enterochromaffin-like (ECL) cells and ECL-cell-derived tumours. The effect of the somatostatin analogue octreotide on ECL cell carcinoids is examined. Five patients with hypergastrinaemia and ECL cell carcinoids were enrolled in a 1-year study of octreotide LAR (long-acting release) 20 mg given at monthly intervals. Biopsies from tumours and from flat oxyntic mucosa were done at the start and 3, 6 and 12 months thereafter. Sections were stained with haematoxylin-erythrosin, immunostained with chromogranin A (CgA) and doublestained with CgA and Ki-67. Serum gastrin and CgA were measured. The number of visible tumours was reduced by more than 50 %. Sections from both tumours and flat mucosa showed a reduced number of CgA immunoreactive cells. Mean serum gastrin decreased from 421 to 186 pM (normal <40 pM); P > 0.05, and serum CgA from 73 to 25 ng/ml (normal < 30 ng/ml); P < 0.001. During treatment the patients were still markedly hypergastrinaemic, whereas the serum CgA showed normalization. A diminished tumour load and reduced ECL cell density were found, indicating an antiproliferative effect of octreotide directly ...Continue Reading

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