Seborrheic Keratosis - Classification

Classification

Seborrheic keratoses may be divided into the following types:

• Common seborrheic keratosis (Basal cell papilloma, Solid seborrheic keratosis)
• Reticulated seborrheic keratosis (Adenoid seborrheic keratosis)
• Stucco keratosis (Digitate seborrheic keratosis, Hyperkeratotic seborrheic keratosis, Serrated seborrheic keratosis, Verrucous seborrheic keratosis)
• Clonal seborrheic keratosis
• Irritated seborrheic keratosis (Basosquamous cell acanthoma, Inflamed seborrheic keratosis)
• Seborrheic keratosis with squamous atypia
• Melanoacanthoma (Pigmented seborrheic keratosis)
• Dermatosis papulosa nigra
• Inverted follicular keratosis

Also see:

• The sign of Leser-Trélat