What underlying condition is most likely?
A 62-year-old female presents with fatigue and innumerable pruritic, keratotic lesions on her back and neck which she says developed quite suddenly two months ago. A blood test reveals a microcytic anemia with hemoglobin of 9.1 g/dL. What is the most likely underlying condition?
A. Diabetes mellitus
B. Gastrointestinal malignancy
C. Hematologic malignancy
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