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Related Experiment Video

Updated: May 11, 2026

Identifying, Diagnosing, and Grading Malignant Peripheral Nerve Sheath Tumors in Genetically Engineered Mouse Models
08:57

Identifying, Diagnosing, and Grading Malignant Peripheral Nerve Sheath Tumors in Genetically Engineered Mouse Models

Published on: May 17, 2024

Multiple endocrine neoplasia type 4.

Misu Lee1, Natalia S Pellegata

  • 1Institute of Pathology, Helmholtz Zentrum München, Neuherberg, Germany.

Frontiers of Hormone Research
|May 9, 2013
PubMed
Summary
This summary is machine-generated.

Multiple Endocrine Neoplasia type 4 (MEN4) is caused by mutations in the CDKN1B gene, which encodes the tumor suppressor p27Kip1. This discovery reveals a new role for CDKN1B in neuroendocrine tumor susceptibility.

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Last Updated: May 11, 2026

Identifying, Diagnosing, and Grading Malignant Peripheral Nerve Sheath Tumors in Genetically Engineered Mouse Models
08:57

Identifying, Diagnosing, and Grading Malignant Peripheral Nerve Sheath Tumors in Genetically Engineered Mouse Models

Published on: May 17, 2024

Area of Science:

  • Endocrinology
  • Oncology
  • Genetics

Background:

  • Multiple Endocrine Neoplasia type 4 (MEN4) is a rare syndrome linked to germline mutations in the CDKN1B gene.
  • The CDKN1B gene encodes p27Kip1, a protein crucial for regulating cell cycle progression and acting as a tumor suppressor.

Purpose of the Study:

  • To review the clinical features of MEN4 syndrome.
  • To analyze the molecular characteristics of p27Kip1 mutations associated with MEN4.
  • To highlight the role of CDKN1B as a tumor susceptibility gene for neuroendocrine tumors.

Main Methods:

  • Review of clinical data from MEN4 patients.
  • Analysis of germline mutations in the CDKN1B gene.
  • In vitro functional studies of p27Kip1 variants.

Main Results:

  • MEN4 patients typically present with parathyroid and pituitary adenomas, resembling MEN1.
  • Germline CDKN1B mutations are also found in sporadic parathyroid disease.
  • Functional analyses show impaired tumor suppressor activity of mutated p27Kip1 variants.

Conclusions:

  • CDKN1B is a tumor susceptibility gene for neuroendocrine tumors.
  • Understanding p27Kip1 function is critical for MEN4 pathogenesis.
  • MEN4 expands the spectrum of multiple endocrine neoplasia syndromes.