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Updated: Jun 8, 2026

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Published on: August 9, 2024
Sclerotic epithelioid dermatofibroma.
Christina Mitteldorf1, Bernhard Zelger, Michael Tronnier
1Department of Dermatology, Venerology and Allergology, Klinikum Hildesheim GmbH, Germany. christina.mitteldorf@klinikum-hildesheim.de
Dermatofibroma, a common skin lesion, presents with diverse patterns that can complicate diagnosis. This case highlights an unusual solitary sclerotic and epithelioid dermatofibroma, offering insights into its varied presentations.
Area of Science:
- Dermatopathology
- Soft Tissue Tumors
- Oncology
Background:
- Dermatofibroma, also known as fibrous histiocytoma, is a frequent benign soft tissue neoplasm.
- It exhibits significant heterogeneity in architectural patterns, cellular morphology, and stromal responses.
- Diagnosing dermatofibroma can be challenging due to the frequent coexistence of multiple histological variants within a single lesion.
Observation:
- This report details an atypical case of a solitary dermatofibroma.
- The lesion presented with a unique combination of sclerotic and epithelioid features.
- The patient was a 48-year-old woman.
Findings:
- The observed histological presentation was unusual for a dermatofibroma.
- The sclerotic and epithelioid components coexisted within the solitary lesion.
- This specific combination posed diagnostic considerations.
Implications:
- Understanding rare histological variants of dermatofibroma is crucial for accurate diagnosis.
- This case expands the spectrum of known dermatofibroma presentations.
- Recognition of unusual patterns aids in differentiating from malignant soft tissue tumors.
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