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Verrucous pseudonevoid melanoma.

S Suster1, M Ronnen, J J Bubis

  • 1Department of Pathology, Chaim Sheba Medical Center, Tel-Hashomer, Israel.

Journal of Surgical Oncology
|October 1, 1987
PubMed
Summary
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This case highlights a rare malignant melanoma variant mimicking a benign papillomatous nevus. Early and accurate diagnosis is crucial to prevent recurrence and potential metastasis.

Area of Science:

  • Dermatopathology
  • Oncology

Background:

  • Malignant melanoma can present with varied morphology, sometimes mimicking benign lesions.
  • Spitz nevi are often difficult to distinguish from melanoma, posing diagnostic challenges.

Observation:

  • A case is presented of a malignant melanoma variant with papillomatous features, initially misdiagnosed as a Spitz nevus.
  • The lesion exhibited architectural atypia with single-cell proliferation and cytologic atypia, including hyperchromatic nuclei and mitoses.

Findings:

  • The unusual melanoma variant recurred locally five months post-excision, underscoring the importance of accurate diagnosis.
  • Histopathological features differentiating this low-grade melanoma from benign nevi include atypical melanocyte architecture and cytology.

Implications:

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  • Distinguishing this low-grade melanoma variant from benign dermal nevi is critical for patient management.
  • Accurate diagnosis can prevent recurrence and the potential for metastatic spread of malignant melanoma.