Nevus Comedonicus Clinical Presentation
- Author: Rossitza Lazova, MD; Chief Editor: William D James, MD more...
History
The lesions are typically present at birth or develop in early childhood. They are usually asymptomatic. However, one case report described itching as an accompanying symptom. Patients usually seek help for cosmetic reasons. The lesions grow as the patient does and often grow faster at puberty. Patients may be able to express keratinaceous material from the pores.
With the inflammatory form, repeated bacterial infections, drainage, cysts, fistula and abscess formation, and scarring may develop.[7, 8, 9]
Physical
The lesion appears as a collection of discrete, dilated follicular ostia plugged with pigmented keratinaceous material.[10, 11] They can be single or multiple, usually unilateral, and range in size from a few centimeters to involving half of the entire body.
Nevus comedonicus is typically found on the face, trunk, neck, and upper extremities.[12, 13, 14, 15] Rarely, it has been described on the palms[16] and soles or penis.[17] When it occurs on the elbows and knees, it can appear as verrucous nodules.
Nevus comedonicus may be linear, interrupted, unilateral, bilateral, present in a dermatomal distribution, following the lines of Blaschko, or segmental.[9, 18, 19, 20, 21, 22, 23]
Nevus comedonicus syndrome is the association of nevus comedonicus with abnormalities in the central nervous system, skeletal system, skin, and eyes, as follows:
- Central nervous system - Epilepsy, electroencephalogram abnormalities, transverse myelitis, microcephaly
- Skeletal system - Scoliosis, hemivertebrae, spina bifida occulta, foot deformities, absent fifth finger, syndactyly, supernumerary digits
- Skin - Ichthyosis, trichilemmal cysts, leukoderma, white hairs, Sturge-Weber syndrome, hemangiomas, linear basal cell nevus
- Eye - Congenital cataracts (unilateral and bilateral)[24]
- Other - Bilateral oligodontia,[25] multiple basal cell carcinomas, rare systemic malignancies
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