INTRA-ORAL SQUAMOUS CELL CARCINOMA IN A PATIENT WITH XERODERMA PIGMENTOSUM: A CASE REPORT WITH UNPREDICTABLE OUTCOME

We report a case of a 23-year-old woman with xeroderma pigmentosum (XP) and a painless endophytic ulcer on the mouth floor, measuring approximately 2 cm, with 8 months of evolution. She had a family history of a brother with XP who underwent lower lip resection and denied neurologic disturbances or prior surgical procedures. Weak photophobia and numerous hyperpigmented ephelides throughout the body were observed. Histopathologic examination of the incisional biopsy confirmed the diagnosis of squamous cell carcinoma. It is known that intra-oral carcinomas are uncommon in XP individuals and, when present, are located mainly at the tongue tip. The patient was referred to the oncologist and 2 months after surgical resection underwent a single chemotherapy and radiotherapy session. However, she died in less than 72 hours after this procedure. Considering the unexpected outcome of this case, we also investigated possible exacerbated adverse effects of antineoplastic treatments in XP patients.