Epidermal nevi and basal cell carcinoma

Collision tumor of Basal cell carcinoma with

Epidermal nevi.

F. Peral Rubio, M.D.Department of DermatologyHospital Universitario Virgen MacarenaSeville, Spain

Collision tumor of Basal cell carcinoma with Epidermal

nevi

A 65-years-old women. The patient was referred to us for

the assessment of a congenital lesion on the back.

The patient has experienced changes 2 years previously.

Collision tumor of Basal cell carcinoma with Epidermal nevi

These are two different lesions:Basal cell carcinomaEpidermal nevi

Collision tumor of Basal cell carcinoma with Epidermal nevi

The dermoscopic features of this pigmented basal cell carcinoma include:

Absence of pigment network Linear and arborising (branch-like)

telangiectasia Leaf-like areas Large blue-grey ovoid nests. Multiple blue-grey globules.

Linear and arborising (branch-like) telangiectasia

Leaf-like areas

Large blue-grey ovoid nests

Multiple blue-grey globules.

Collision tumor of Basal cell carcinoma with Epidermal nevi

An epidermal nevi resembles a seborrhoeic keratosis or viral wart, with fissures, crypts and milia.

Collision tumor of Basal cell carcinoma with Epidermal nevi

The dermoscopic features of this epidermal nevi include:Milia-like cysts Irregular crypts Fissures/ridges

Irregular crypts

Fissures/ridges

Milia-like cysts

Collision tumor

Collision tumor of Basal cell carcinoma with

Epidermal nevi.

F. Peral Rubio, M.D.Department of DermatologyHospital Universitario Virgen MacarenaSeville, Spain