Presentation of Case A 69-year-old man was admitted to the hospital because of numbness of the right hand and a mass in the right axilla. He was well until two months earlier, when he began to notice numbness over the palmar aspect of the right thumb and index, middle, and third fingers. Two weeks before admission he felt a right axillary mass and observed that the numbness was increasing and that the flexors of the right thumb, index finger, and wrist were weak. He was seen at another hospital, where examination of a stool specimen for occult blood was reported.
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