Một phụ nữ 69 tuổi bị tăng huyết áp và viêm xương khớp đã được thừa nhận đến bệnh viện với TIA crescendo bao gồm hemiparesis trái và hemianesthesia. Cô đã không có tiền sử đau đầu. Noncontrasted MRI đã được ra lệnh, nhưng khi nhìn thấy hình ảnh bên trái, độ tương phản được tiêm. | IMAGING QUESTIONS 223 437. The vessel indicated by the arrow is the A. Left superior cerebellar artery. B. Left pCa. C. Anterior cerebral artery. D. Anterior spinal artery. 438. The delta sign or the empty delta sign is most commonly associated with A. Airline strikes. B. Bilateral paramedian hemorrhages. C. Subdural hematoma. D. Transverse sinus thrombosis. 224 IMAGING QUESTIONS 439. A 69-year-old woman with hypertension and osteoarthritis was admitted to the hospital with crescendo TIAs consisting of left hemiparesis and hemianesthesia. She had no history of headaches. Noncontrasted MRI was ordered but when the image on the left was seen contrast was injected. The findings on this MRI are most consistent with A. Developmental venous anomaly DVA previously referred to as venous angioma along with a cavernous malformation. B. Cavernous malformation alone. C. A DVA alone. D. Sturge-Weber syndrome. E. Acute right cerebellar hemorrhage. 440. A 39-year-old white woman presented with a history of migraine-type headaches accompanied by numbness in the left arm. An MRI was obtained. The structure indicated by the arrow is most likely A. Basilar aneurysm. B. Pineal cyst. C. Artifact of MRI. D. Colloid cyst. IMAGING QUESTIONS 225 441. A 77-year-old man with atrial fibrillation presented with a 30-minute episode of moderate aphasia. He had a past history of trauma years prior that left him blind in the left eye. His medications included aspirin and two antihypertensive medications. His MRI showed multiple small strokes. He was treated with warfarin. Two years later he went to his eye doctor complaining about his vision in the right eye. No visual fields were done and new glasses were prescribed. Two weeks later he presented in the neurology clinic for evaluation of worsening visual loss. The INR was . The MRI obtained suggests A. Hemorrhagic transformation of a cardioembolic infarct. B. Abscess. C. Primary brain tumor. D. Lobar hemorrhage. 442. This MRA illustrates a A. .
