Papillomatous nevus

Papillomatous nevus is an uncommon melanocytic lesion.

General

• Rare.
• Predominantly in females - thought to be estrogen-related.

Microscopic

Features:

• Benign nevus - intradermal or compound.
• Finger-like projection from the epidermis.
• Pseudohorn cysts.

DDx:

• Seborrheic keratosis and nevus - lesions should be distinct and collide.

Sign out

SKIN LESION, BACK, EXCISION:
- PAPILLOMATOUS COMPOUND NEVUS.

Micro

The sections show melanocytes in the dermis and epidermis. There is no pagetoid spread of melanocytes in the epidermis. Superficially, melanocytes are in nests. Melanocytes mature with depth. No melanocytic proliferative activity is seen. No significant melanocyte atypia is apparent.

Fine strands of benign basaloid epidermal cells extending from the epidermis (reticulated pattern). Pseudohorn cysts are present.

See also

• Seborrheic keratosis.
• Melanocytic lesions.