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Lichenoid Keratosis: A Skin Cancer Mimic
Biopsy of the 3 red “spots” in close proximity showed lichenoid keratosis-a benign lesion, probably related to seborrheic keratosis, which often mimics skin cancer.
A 57-year-old woman complained about a cluster of “sores” on her chest. Her past history included treatment for a small number of actinic keratoses and a single basal cell carcinoma of the face.
Key point: There are 3 red “spots” in close proximity. The differential diagnosis is quite wide, and includes folliculitis, seborrheic keratoses (inflamed), actinic keratoses, small superficial basal cell carcinomas, or small squamous cell carcinomas in-situ. This morphology is simply too nondescript to suggest a definitive diagnosis. Biopsy of all lesions showed lichenoid keratosis- a benign lesion, probably related to seborrheic keratosis, which often mimics skin cancer.
Treatment: No therapy is indicated for lichenoid keratosis. Light liquid nitrogen cryosurgery can be done to remove larger, cosmetically objectionable lesions.
Note: Lichenoid keratoses favor the upper arms, shoulders and chest.
Atopic Dermatitis: The Pipeline and Clinical Approaches That Could Transform the Standard of Care
September 24th 2025Patient Care tapped the rich trove of research and expert perspectives from the Revolutionizing Atopic Dermatitis 2025 conference to create a snapshot of the AD care of the future.
