Final answer:
In scleroderma with acute renal failure and malignant hypertension, the urinalysis may show red cell casts and the blood smear may indicate microangiopathic hemolytic anemia with schistocytes.
Step-by-step explanation:
In a patient with scleroderma who is experiencing acute renal failure and malignant hypertension, one might expect to see findings consistent with microangiopathic hemolytic anemia on a blood smear. Specifically, this could be evidenced by the presence of schistocytes, which are fragmented red blood cells indicative of a microangiopathic process. The urinalysis (UA) may show red cell casts suggesting glomerular disease. Thus, the correct answer would be UA: Red cell casts; Blood smear: Microangiopathic hemolytic anemia. Red cell casts in the urine point towards an underlying renal condition such as glomerulonephritis, which could be secondary to scleroderma renal crisis.