arsenical keratosis

ar·sen·i·cal ker·a·to·sis

multiple punctate keratoses, most commonly of the palms and soles but also of the fingers and proximal portions of the extremities, resulting from long-term arsenic ingestion; they resemble Bowen disease microscopically and may become squamous cell or basal cell carcinoma.
References in periodicals archive ?
Arsenical keratosis appears as diffuse thickening involving palms and soles, alone or in combination with nodules usually symmetrically distributed.