Seven hours after undergoing left hip arthroplasty for chronic hip pain, a 67-year-old woman reports a prickling sensation in her left anteromedial thigh and lower leg. Neurologic examination shows left leg strength 3/5 on hip flexion and 2/5 on knee extension. Patellar reflex is decreased on the left. Sensation to pinprick and light touch are decreased on the anteromedial left thigh as well as medial lower leg. Which of the following is the most likely underlying cause of this patient's symptoms?
AFemoral nerve injury
BL5 radiculopathy
CSural nerve injury
DS1 radiculopathy
EFibular nerve injury
A 76-year-old hypertensive man who used to smoke 20 cigarettes a day for 40 years but quit 5 years ago presents to his family physician with a painless ulcer on the sole of his left foot, located at the base of his 1st toe. He has a history of pain in his left leg that awakens him at night and is relieved by dangling his foot off the side of the bed. His wife discovered the ulcer last week while doing his usual monthly toenail trimming. On physical exam, palpation of the patient’s pulses reveals the following: Right foot Femoral 4+ Popliteal 3+ Dorsalis Pedis 2+ Posterior Tibial 1+ Left foot Femoral 4+ Popliteal 2+ Dorsalis Pedis 0 Posterior Tibial 0 Pulse detection by Doppler ultrasound revealed decreased flow in the left posterior tibial artery, but no flow could be detected in the dorsalis pedis. What is the most likely principal cause of this patient’s ulcer?
AAn occluded posterior tibial artery on the left foot
BAn occlusion of the first dorsal metatarsal artery
CA narrowing of the superficial femoral artery
DAn occlusion of the deep plantar artery
EAn absent dorsalis pedis pulse with an absent posterior tibial pulse in the left foot
A 38-year-old man is brought to the emergency department after suffering a motor vehicle accident as the passenger. He had no obvious injuries, but he complains of excruciating right hip pain. His right leg is externally rotated, abducted, and extended at the hip and the femoral head can be palpated anterior to the pelvis. Plain radiographs of the pelvis reveal a right anterior hip dislocation and femoral head fracture. Which sensory and motor deficits are most likely in this patient's right lower extremity?
ALoss of sensation laterally below the knee, weak thigh extension and knee flexion
BNumbness of the ipsilateral scrotum and upper medial thigh
CSensory loss to the dorsal surface of the foot and part of the anterior lower and lateral leg and foot drop
DParesis and numbness of the medial thigh and medial side of the calf, weak hip flexion and knee extension
ENumbness of the medial side of the thigh and inability to adduct the thigh
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