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In two cases, reflex sympathetic dystrophy (RSD) was due to herniated intervertebral disk at L4-5. In both cases, bone scanning with technetium 99m pyrophosphate was of value and its use is recommended in diagnosing mild or early cases of RSD. RSD may be the cause of persisting pain after disk surgery.

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To our knowledge the first case of an intrarenal pheochromocytoma is reported. It is important to realize that an intrarenal or apparent intrarenal mass in a hypertensive patient might be a pheochromocytoma so that appropriate precautions can be taken.