Case 17-2021: An 82-Year-Old Woman With Pain, Swelling, And Ecchymosis Of The Left Arm

A Woman with Pain, Swelling, and Ecchymosis of the Left Arm An 82-year-old woman was admitted with pain, swelling, and discoloration of the left arm. CT revealed hematoma involving the brachioradialis muscle. The prothrombin time was 13.3 seconds (normal range, 11.5 to 14.5) and the activated partial-thromboplastin time 72.4 seconds (normal range, 22 to 36). A diagnostic test was performed.