Clinical Features:

• Presents around adolescence
• More common in blacks, with a female predominance
• Presents with small papules on the chest, back and upper arms
• The papules enlarge and eventually become confuent and reticulated.

Histologic Features:

• The epidermis shows papillomatosis with hyperparakeratosis and often acanthosis.
• Downgrowths of the epidermis between the rete ridges
• Mild increase or sometimes decrease in basal layer pigmentation
• Dermal vascular dilatation with a mild perivascular lymphohistiocytic infiltrate
• There is sometimes fragmentation of upper dermal elastic fibers and mild papillary dermal edema.

Cases associated with this book:

Confluent and reticulated papillomatosis
Author: Stephen Lyle, M.D., Ph.D.

Conference: DermatopathologyConsultations.com Teaching Collection