An 84-year-old man presented with fever, malaise, and discoloration and pain in his fingers and toes ongoing for 2 weeks. He had no history of smoking.
On physical examination, he was afebrile with blue-black discoloration on several fingers of his left hand and purpuric lesions on both hands and feet. He had palpable radial and dorsalis pedis pulses on both sides.
What is the most likely diagnosis?
