What question did this study set out to answer?

To determine the frequency and location of MEN1 gene mutations in sporadic gastrinomas and correlate them with clinical presentation, tumor location, disease extent, and postoperative growth.

January 1, 2000The Journal of Clinical Endocrinology & Metabolism

Genotype/Phenotype Correlation of Multiple Endocrine Neoplasia Type 1 Gene Mutations in Sporadic Gastrinomas

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To determine the frequency and location of MEN1 gene mutations in sporadic gastrinomas and correlate them with clinical presentation, tumor location, disease extent, and postoperative growth.
Extracted DNA from frozen gastrinoma specimens from 51 patients without familial MEN1 syndrome (N=51).
Screened the 9 coding exons and splice junctions of the MEN1 gene via dideoxyfinger-printing followed by direct DNA sequencing.
Tracked postoperative tumor growth using serial imaging and correlated genetic mutations with clinical manifestations and surgical outcomes.
Identified 16 distinct MEN1 mutations in 31% (16/51) of tumors, with mutations clustered significantly in exon 2 (9/16 vs 7/16 across remaining exons; P=0.005 per nucleotide).
Pancreatic and lymph node gastrinomas harbored exclusively exon 2 mutations compared to duodenal tumors (P=0.011), and small tumors (<1 cm) more frequently harbored non-exon 2 mutations (P=0.02).
Patients with and without mutations showed no differences in clinical features, disease extent, or postoperative disease-free rates, with only a nonsignificant trend toward more aggressive postoperative growth (P=0.09).

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Implication

Cohort study uncovers MEN1 gene mutations in 31% of sporadic gastrinomas, indicating that mutation status does not drive clinical tumor growth or outcomes.

Cite This Study

Goebel et al. (2000) studied this question.

synapsesocial.com/papers/6a7142858031ec7bb1dcdb22 https://doi.org/10.1210/jcem.85.1.6260

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Implication

Cohort study uncovers MEN1 gene mutations in 31% of sporadic gastrinomas, indicating that mutation status does not drive clinical tumor growth or outcomes.

Genotype/Phenotype Correlation of Multiple Endocrine Neoplasia Type 1 Gene Mutations in Sporadic Gastrinomas

Key Points

Discussion

Implication

Cite This Study

Genotype/Phenotype Correlation of Multiple Endocrine Neoplasia Type 1 Gene Mutations in Sporadic Gastrinomas

Key Points

Discussion

Implication

Cite This Study

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