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Sclerotic primary cutaneous leiomyosarcoma

J E Karroum1, E G Zappi, C J Cockerell

  • 1Department of Dermatology, University of Texas, Southwestern Medical Center at Dallas 75235-9072, USA.

The American Journal of Dermatopathology
|June 1, 1995
PubMed
Summary
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A painful skin tumor, initially misdiagnosed, was identified as sclerotic cutaneous leiomyosarcoma. This rare variant presents diagnostic challenges due to extensive sclerosis, requiring consideration in differential diagnoses.

Area of Science:

  • Dermatopathology
  • Oncology
  • Surgical Pathology

Background:

  • Primary cutaneous leiomyosarcoma is a rare malignancy.
  • Diagnosis can be challenging due to varied presentations.
  • Sclerosis is an uncommon feature in cutaneous leiomyosarcomas.

Observation:

  • A 54-year-old male presented with a 6-year history of a painful back lesion.
  • Initial biopsy diagnosed cutaneous sclerosis.
  • Excisional biopsy revealed a diffuse spindle cell neoplasm with extensive sclerosis.

Findings:

  • Immunohistochemistry showed positive vimentin and smooth muscle actin, with negative desmin.
  • The tumor extended from the dermis into the subcutis.
  • Histology demonstrated sparse cellularity in sclerotic areas.

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Implications:

  • Sclerotic cutaneous leiomyosarcoma is a distinct, rare variant requiring recognition.
  • Extensive sclerosis can mimic benign conditions, complicating diagnosis.
  • Painful cutaneous neoplasms should include this entity in their differential diagnosis.