Nevus sebaceus in Child
Numerous benign neoplasms may arise within nevus sebaceus, most commonly after adolescence. Trichoblastomas are the most frequent benign tumors arising within nevus sebaceous, followed by syringocystadenoma papilliferum. Basal cell cancer is the commonest malignancy. Traditionally, the lifetime risk of malignant transformation (to basal cell carcinoma, squamous cell carcinoma, sebaceous carcinoma, etc) was estimated at 5%-15%, although more recent evidence indicates that this is an overestimation.
In cases with a large plaque or multiple plaques, a diagnosis of nevus sebaceus syndrome may be considered. This condition may manifest with neurologic, ocular, and musculoskeletal abnormalities.
Q85.9 – Phakomatosis, unspecified
707136009 – Nevus sebaceous
- Perinatal trauma to the scalp from forceps, scalp blood sampling, or monitor electrode placement may result in scarring with associated alopecia.
- Aplasia cutis congenita presents at birth as a focal erosion or ulceration in the scalp. Lesions eventually heal with atrophy and scarring with associated alopecia. A ring of long, coarse, dark hair (hair collar sign) suggests associated underlying neural tube closure defect.
- Linear epidermal nevus
- Seborrheic keratosis
- Epidermal nevus
- Solitary mastocytoma
- Juvenile xanthogranuloma
- Nevus comedonicus
Last Updated: 10/15/2019