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Occupation-related pigmented macules on the sole with parallel-ridge pattern on dermatoscopy
M Tanioka1, Y Matsumura, A Utani
1Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan. mtanioka@kuhp.kyoto-u.ac.jp
Clinical and Experimental Dermatology
|June 11, 2009
Summary
A chemical worker
Area of Science:
- Dermatology
- Occupational Health
Background:
- Pigmented macules on the sole can mimic melanoma.
- Dermatoscopy is crucial for diagnosing skin lesions.
Observation:
- A patient presented with macules on his sole exhibiting a parallel-ridge pattern.
- The patient handled para-phenylenediamine (PPD) at a chemical company.
- Histology ruled out atypical melanocytes.
Findings:
- Shaving the lesions' cornified layer resolved the macules.
- PPD exposure is hypothesized to cause this reaction.
- This suggests a novel occupation-related differential diagnosis.
Implications:
- Highlights PPD as a potential cause of sole macules.
- Emphasizes considering occupational exposures in dermatological diagnosis.
- Adds to the differential diagnosis of parallel-ridge patterns in dermatoscopy.
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