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Updated: Jan 3, 2026

A 3D Organotypic Melanoma Spheroid Skin Model
Published on: May 18, 2018
Sebaceoma on the scalp simulating a malignant pigmented neoplasia
Bárbara Catojo Poggi1, Daniel Fernandes Melo2, Juliana Marques-da-Costa3
1Department of Dermatology, Hospital Naval Marcílio Dias, Rio de Janeiro, RJ, Brazil.
Diagnosing scalp lesions is difficult, even with dermoscopy. This case highlights a sebaceoma that appeared as a malignant pigmented neoplasm, confirmed by histopathology.
Area of Science:
- Dermatology
- Oncology
- Pathology
Background:
- Accurate diagnosis of pigmented nodular scalp lesions is challenging.
- Clinical patterns and dermoscopy are valuable but sometimes ambiguous diagnostic tools.
Observation:
- A case is presented where a sebaceoma mimicked a malignant pigmented neoplasm.
- The lesion's presentation posed diagnostic difficulties.
Findings:
- Histopathology provided a conclusive diagnosis of sebaceoma.
- The study underscores the importance of histopathology in differentiating benign from malignant lesions.
Implications:
- This case emphasizes the need for careful histopathological evaluation of ambiguous scalp lesions.
- Understanding sebaceoma's potential to mimic malignancy is crucial for appropriate patient management.
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