A 40-year-old female began to develop tumors in childhood and continued to form them in adulthood. The tumors arose from the proximal or lateral nail fold and occurred most commonly around the toenails. She developed subungual tumors that originated under the nail plate and longitudinal red streaks with proximal narrowing in the fingernails. Over time, the lesions led to longitudinal grooving and distortion of the nail plate without a visible tumor. Which of the following is the most likely diagnosis?
C. Tuberous sclerosis
D. Multiple endocrine neoplasia, type I
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