Select the best answer. A 40-year-old perimenopausal adult p…
Select the best answer. A 40-year-old perimenopausal adult presents to a primary care nurse practitioner with complaints of a recent onset of numbness in the left arm and lower extremity spasms. The patient experienced a similar bout of symptoms 1 year ago. On physical exam, the NP finds a clonus in the ankles and knees and increased tone. The primary care nurse practitioner plans to refer the patient for specialty care with which of the following most-likely differential diagnoses?