Phosphoglyceride crystal deposition disease in the spine: a case report.

The authors report phosphoglyceride crystal deposition disease in the spine after a lumbar anesthetic given at the time of appendectomy. A 76-year-old Japanese woman with increasing lumbar pain was transported to our hospital in an ambulance. She had tumor-like lesions that had repeatedly appeared in injured soft tissues for >20 years. Osteolytic changes were detected by x-ray in the 12th thoracic vertebra and the 4th lumbar vertebra. Compression of the left L4 nerve root was detected by myelography, and a tumor corresponding to the left L3-L4 intervertebral foramen was determined by computed tomography. An operation to achieve posterior decompression and fusion was performed. The histopathologic tests on this coarse matter revealed a radial deposition of needle crystals and a strong foreign matter reaction in the periphery. Based on the above analyses, the deposited crystals were regarded as phosphoglyceride. Phosphoglyceride crystal deposition disease is characterized by the deposition of crystals of the phospholipid called phosphoglyceride in sites especially susceptible to invasion, such as surgical sites. To our best knowledge, only three cases of phosphoglyceride crystal deposition disease, including this one, have been reported.