Eight years ago (1937) I observed a patient suffering from excruciating low back pain so severe that she was unable to get out of bed. Examination revealed a small tumor in the left sacroiliac region; pressure on this tumor intensified the pain. A biopsy was suggested, but the patient refused to have it done. Injection of 1 per cent aqueous procaine solution around the tumor gave temporary relief. Since then the patient has had periodic attacks of the same type of pain, necessitating bed rest. Injections of metycaine, strapping and physical therapy produced temporary relief.
In October 1943 another patient, also a woman, was seen because of acute low back pain, and she also displayed a small palpable mass over the right side of the sacrum, which was extremely tender and painful. Circuminjection with 2 per cent metycaine gave immediate relief. The patient had a history of "lumbago" of several
HERZ R. HERNIATION OF FASCIAL FAT AS A CAUSE OF LOW BACK PAIN: WITH RELIEF BY SURGERY IN SIX CASES. JAMA. 1945;128(13):921–925. doi:10.1001/jama.1945.02860300011003
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