system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 63-year-old woman comes to the office because of a 2-year history of upper and lower extremity weakness and neck pain that is worse with sneezing. She has had difficulty swallowing and speaking for the past 8 months. Musculoskeletal examination shows spasticity and decreased muscle strength in all extremities. There is bilateral atrophy of the trapezius and sternocleidomastoid muscles. Neurologic examination shows an ataxic gait and dysarthria. Deep tendon reflexes are 4+ bilaterally. Babinski sign is positive. Sensation is decreased below the C5 dermatome bilaterally. An MRI of the neck and base of the skull is shown. Which of the following is the most likely cause of this patient's symptoms?
assistant
Foramen magnum meningioma