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Malignant proliferating trichilemmal cyst

J Weiss1, M Heine, M Grimmel

  • 1Department of Dermatology, Mannheim Medical School, University of Heidelberg, Germany.

Journal of the American Academy of Dermatology
|May 1, 1995
PubMed
Summary
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A rare proliferating trichilemmal cyst metastasized to lymph nodes in a 78-year-old man. Despite surgical removal, the malignant tumor rapidly spread, highlighting diagnostic and treatment challenges for these unpredictable tumors.

Area of Science:

  • Dermatology
  • Oncology
  • Pathology

Background:

  • Proliferating trichilemmal cysts (PTCs) are uncommon skin neoplasms.
  • While typically benign, malignant transformation can occur.
  • Metastasis from PTCs is exceptionally rare.

Observation:

  • A 78-year-old male presented with multiple common and two PTCs.
  • One PTC exhibited malignant transformation with lymph node metastasis.
  • The patient had a history of multiple skin lesions.

Findings:

  • Surgical excision of the malignant PTC was performed.
  • Despite surgery, rapid and extensive metastatic disease developed.
  • The case underscores the aggressive potential of transformed PTCs.

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Implications:

  • Accurate diagnosis of malignant PTCs is challenging.
  • Treatment strategies for metastasizing PTCs require careful consideration.
  • The unpredictable clinical course necessitates vigilant patient monitoring.