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Multiple endocrine neoplasia
D R Caruso1, T M O'Dorisio, E L Mazzaferri
1Ohio State University School of Medicine, Columbus.
Abstract:
The multiple endocrine neoplasia (MEN) syndromes are well-defined disorders characterized by familial inheritance of specific endocrine tumors. The parathyroid, endocrine, pancreas, and pituitary tumors of MEN-1 are described by frequency and symptomatology. The effectiveness of surgery, symptomatic therapy, and panendocrine suppression by the somatostatin congener octreotide are discussed. Evidence indicates that the MEN-1 gene is located on chromosome 11 and tightly linked markers can help identify family members at risk for inheriting the gene. In MEN-2, the effectiveness of biochemical screening for thyroidal C-cell neoplasms and early thyroidectomy are described. New imaging techniques have been developed to identify medullary thyroid carcinoma and pheochromocytoma in MEN-2. Genetic analysis has identified markers on chromosome 10 closely linked to the MEN-2a gene, allowing better identification of family members likely to develop the syndrome.
Insights
Multiple endocrine neoplasia (MEN) syndromes involve inherited endocrine tumors. Genetic markers on chromosomes 11 (MEN-1) and 10 (MEN-2) aid in identifying at-risk individuals for these rare genetic disorders.
Area of Science:
- Endocrinology
- Genetics
- Oncology
Background:
- Multiple endocrine neoplasia (MEN) syndromes are inherited disorders characterized by the development of tumors in endocrine glands.
- MEN syndromes have distinct subtypes, MEN-1 and MEN-2, each associated with specific tumor profiles and genetic loci.
Purpose of the Study:
- To review the clinical presentation, diagnostic approaches, and management strategies for MEN-1 and MEN-2 syndromes.
- To highlight advancements in genetic analysis for identifying at-risk family members.
Main Methods:
- Review of clinical data on tumor frequency and symptomatology in MEN-1.
- Discussion of surgical and medical treatment efficacy, including octreotide for MEN-1.
- Description of biochemical screening and imaging techniques for MEN-2 neoplasms.
- Analysis of genetic linkage studies for MEN-1 and MEN-2 genes.
Main Results:
- MEN-1 involves parathyroid, pituitary, and pancreatic tumors, with genetic linkage to chromosome 11.
- MEN-2 is characterized by medullary thyroid carcinoma and pheochromocytoma, with genetic linkage to chromosome 10.
- Effective management strategies include surgery, symptomatic therapy, and genetic screening.
Conclusions:
- Early identification and intervention are crucial for managing MEN syndromes.
- Genetic markers significantly improve the ability to identify at-risk individuals for MEN-1 and MEN-2.
- Advancements in screening and genetic analysis enhance patient outcomes for these familial endocrine tumor syndromes.