Abstract
We report that patients with nevoid basal cell carcinoma syndrome (Gorlin syndrome) are at risk for developing neoplasms, especially basal cell carcinomas and rarely medulloblastoma. A case report is presented of a 5-year-old child with medulloblastoma and multiple basal cell carcinomas who was diagnosed with nevoid basal cell carcinoma syndrome. Genetic analyses were performed on tumor DNA from the patient's medulloblastoma and basal cell carcinoma as well as germline DNA from the patient and unaffected family members. After radiation therapy for medulloblastoma, the patient developed thousands of additional basal cell carcinomas. Analysis of tumor DNA revealed the characteristic defect of nevoid basal cell carcinoma syndrome, loss of heterozygosity at 9q22. Photodynamic therapy was successfully used to control the majority of her cutaneous tumors. DNA analysis confirmed the presence of the distinctive genetic lesion of nevoid basal cell carcinoma syndrome in both medulloblastoma and basal cell carcinoma. Omitting or limiting radiation therapy for children with nevoid basal cell carcinoma syndrome and medulloblastoma should be considered.
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