A patient presents for evaluation of a solitary painful lesion on the shin. She feels well and denies any systemic symptoms. A recent fasting blood glucose was within normal limits. Which of the following is the most likely diagnosis?

A. Pretibial myxedema

B. Morphea

C. Lipodermatosclerosis

D. Necrobiotic xanthogranuloma

E. Necrobiosis lipoidica

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