PMC5491812_01
The color of the urine was brown but not dark.
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A urinalysis revealed light brown urine (Fig. 1), with 3+ occult blood, 2+ protein, a specific gravity of 1.026, a pH of 6.0, and a myoglobin level of 160,000 ng/mL (reference value, <=10).
An anterior Tc-99m pyrophosphate scintigraphy image (left panel) showing the increased uptake in the pectoralis major muscle and the right and left biceps brachii muscles. The uptake of the radioisotope was found to be increased in the triceps brachii muscles of both sides on the posterior image (right panel).
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Tc-99m pyrophosphate, performed the day after admission, showed the increased uptake of the radioisotope in the pectoralis major muscle and the biceps and triceps brachii muscles on both sides (Fig. 2). The myalgia gradually improved with a steady decrease in the serum level of CK.