with a 2to 3-month history of increasing discomfort in the left anterior hip and pelvic area. She had also noted a decrease in her stride length, as well as a nontender mass in the thigh. There was some dysesthesia in the leg with long periods of sitting. She denied suffering any associated injury. Her medical history included a protein-S deficiency, a recent atypical Papanicolaou smear that pr...