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Angiosarcoma with dermal melanocytosis.

M Akiyama1, W Naka, T Harada

  • 1Department of Dermatology, Keio University School of Medicine, Tokyo, Japan.

Journal of Cutaneous Pathology
|June 1, 1989
PubMed
Summary
This summary is machine-generated.

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This study details a rare case of simultaneous angiosarcoma and dermal melanocytosis in a single lesion. The findings highlight distinct cellular characteristics and no intermediate forms, prompting discussion on etiological links.

Area of Science:

  • Dermatopathology
  • Oncology
  • Vascular Neoplasms

Background:

  • Angiosarcoma is a rare malignant vascular tumor.
  • Dermal melanocytosis refers to the presence of melanocytes in the dermis.
  • Simultaneous occurrence in a single lesion is exceptionally rare.

Observation:

  • Histopathological examination revealed anaplastic angiosarcoma cells forming irregular cavities.
  • Immunohistochemistry showed strong reactivity of angiosarcoma cells with Ulex europaeus agglutinin (UEAI).
  • Spindle or elongated melanocytes containing melanin were identified in the dermis, positive for S-100 protein.

Findings:

  • Ultrastructural analysis of angiosarcoma cells showed pinocytotic vesicles, filaments, and Weibel-Palade body-like granules.
  • Dermal melanocytes exhibited external lamina and melanosomes, distinct from tumor cells.

Related Experiment Videos

  • No cellular similarity or intermediate forms were observed between angiosarcoma and melanocytes.

    • Implications:

    • The distinct nature of both cell types suggests independent origins.
    • Discusses potential etiological factors linking dermal melanocytosis with vascular tumors.
    • Highlights the importance of comprehensive histopathological and ultrastructural analysis in rare cutaneous lesions.