The following information may help to address your question:
Linear nevus sebaceus of Jadassohn is characterized by single or multiple skin lesions. The lesions can form extensive hairless plaques, slightly elevated, circumscribed, with a soft velvety surface, yellowish in white individuals and hyperpigmented in black individuals. During puberty, the lesions grow and become more evident, warty, and sometimes nodular. During adulthood, patients have an increased risk for developing skin tumors within the lesion.
Eye symptoms may include abnormally small eyes, lipodermoid scleral tumors (yellowish-white, fatty, non-cancerous scleral tumors), corneal opacity (cloudiness of the front part of the eye), eye calcifications, and coloboma (a structural defect of the eye). Click here to view an interactive diagram of the eye.
People with linear nevus sebaceous syndrome may be at an increased risk for developing certain cancers such as skin, breast, salivary gland, stomach, ameloblastoma, esophageal, and bladder cancer.
Linear nevus sebaceous syndrome is associated with vitamin D-resistant rickets due to secretions from the linear sebaceous nevus of Jadassohn (skin lesion).