• extreme pain or pressure in the neck, head, or back
• tingling or sensation loss in the hands, fingers, feet, or toes
• partial or complete loss of control over any body part
• urinary or bowel urgency, incontinence, or retention
• difficulty with balance and walking
• impaired breathing
• abnormal bandlike sensations in the thorax, with pain and pressure
• unusual lumps on the head or spine.