Which Malignancy Is This Patient At Risk For?

A 62-year-old female presents with a new non-pruritic rash and muscle weakness. She mentions having trouble carrying her young grandchildren recently and getting up from the couch. Examination reveals an erythematous rash on her face, back, and neck, and violaceous papules on her eyelids and the joints of her fingers. Laboratory tests demonstrate positive antinuclear antibodies and an elevated serum creatinine kinase. This condition is associated with an increased risk of malignancy. With which of the following malignancies is this risk highest? 

A. Renal cell carcinoma
B. Leukemia
C. Ovarian cancer
D. Thyroid cancer

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