clinical quiz:A 42-year-old woman presents with pins and needles in her hands and feet. She incidentally describes weight loss and offensive smelling stool. She has a history of diverticular disease and anaemia. She is a non-smoker and non-drinker. She eats red meat. On examination, the power and tone in her legs are normal. There are exaggerated knee jerks and absent ankle jerks. Joint position and vibration sense are absent below her ankles. The plantar responses are extensor. Investigation…See More