Nevus sebaceus of Jadassohn

Area of Science:

• Dermatology
• Pathology
• Plastic Surgery

Background:

• Nevus sebaceus of Jadassohn (SNJ) is an organoid nevus commonly affecting the face and scalp.
• Adult patients with SNJ face a 10-20% risk of developing cutaneous or adnexal neoplasia.
• Prophylactic excision before puberty is often recommended, with tissue expansion as a primary reconstructive approach.

Observation:

• This study reviews histopathologic findings in SNJ and presents two cases in young females.
• Case 1 involved intraoperative expander-assisted reduction and scalp grafting.
• Case 2 utilized primary closure with adjacent tissue.

Findings:

• Most lesions previously diagnosed as basal cell carcinoma (BCC) in SNJ are actually primitive follicular induction or trichoblastomas.
• Both cases showed no signs of malignant degeneration or residual pathology post-treatment.
• Intraoperative tissue expansion followed by scalp grafting is effective for large lesions when preoperative expansion isn't feasible.
• Primary closure with adjacent tissue is adequate for smaller SNJ lesions.

Implications:

• Accurate histopathologic diagnosis is crucial for managing SNJ, distinguishing benign proliferations from true malignancies.
• Surgical management strategies, including tissue expansion and grafting, should be tailored to lesion size.
• Early intervention for SNJ can mitigate risks associated with neoplastic transformation and improve reconstructive outcomes.