Arch Iran Med
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Pigmented Bowen's disease is an uncommon in situ squamous cell carcinoma of the skin, which has been rarely reported on the finger. Herein, we report an unusual case of pigmented Bowen's disease of the pulp of the fourth finger in a 20-year-old white woman, which was clinically presented as a superficial, spreading malignant melanoma. Physical examination revealed a solitary hyperpigmented patch, measuring 1 cm in its greatest diameter. ⋯ Histological examination was compatible with the diagnosis of pigmented Bowen's disease. Surgical treatment was then considered and the patient underwent complete excision of the lesion. In spite of its rarity, Bowen's disease should be considered in the differential diagnosis of pigmented lesions, particularly malignant melanoma.