A woman in her late forties experienced severe pain and numbness in the left anterior knee while kneeling and stretching to tend a fireplace. She had no swelling, but the numbness persisted, and the area is now devoid of sensation to pinprick and vibration. Six months later she had acute pain and subsequent numbness of the lateral aspect of the right leg. There are no vasomotor changes or discoloration of the skin; the area is devoid of sensation to pinprick and vibration. A similar area of numbness developed overlying the left Achilles tendon, subsequent to stretching.

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