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Familial pulmonary carcinoid tumors
A M Oliveira1, H D Tazelaar, K A Wentzlaff
1Department of Laboratory Medicine and Pathology, Division of Anatomic Pathology, Mayo Clinic and Mayo Foundation, Rochester, Minnesota, USA.
Cancer
|June 8, 2001
Summary
Familial pulmonary carcinoid tumors, rare lung cancers, were identified in families without Multiple Endocrine Neoplasia type 1 (MEN1). This suggests a new genetic cause for these rare tumors, distinct from MEN1.
Area of Science:
- Pulmonary oncology
- Genetics of neuroendocrine tumors
Background:
- Pulmonary carcinoid tumors are rare neuroendocrine neoplasms of the lung.
- They typically occur sporadically, with infrequent association with Multiple Endocrine Neoplasia type 1 (MEN1).
- Familial occurrence of pulmonary carcinoid tumors unrelated to MEN1 has not been previously documented.
Observation:
- Two families presented with multiple first-degree relatives diagnosed with primary pulmonary carcinoid tumors.
- Affected individuals in these families showed no clinical manifestations of MEN1.
- Genetic analysis of the MEN1 gene in affected family members did not reveal any germline mutations.
Findings:
- Histopathological and immunohistochemical analyses confirmed carcinoid tumor diagnoses.
- Absence of MEN1 features and MEN1 gene mutations in affected families.
- Identified familial pulmonary carcinoid tumors independent of MEN1.
Implications:
- Suggests a novel, rare germline mutation predisposing to pulmonary carcinoid tumors.
- Highlights a potential new genetic pathway for pulmonary carcinoid development.
- Warrants further investigation into non-MEN1 genetic factors in familial lung carcinoids.