Tumoral calcinosis of the lumbar meninges: Case report

OBJECTIVE AND IMPORTANCE: Tumoral calcinosis is a rare disorder of unknown origin. Tumoral calcinosis involving the spine is extremely rare. This is t he first case of tumoral calcinosis localized in the dura mater of the lumb ar spine. CLINICAL PRESENTATION: This 55-year-old male patient presented with tumoral calcinosis of the lumbar meninges. T1-weighted, sagittal magnetic resonanc e imaging scans of the lumbar spine revealed a round mass of slightly incre ased intensity with high-intensity margins, located posterior to the cauda equina at the L4-L5 level. The cauda equina was severely compressed anterio rly. T2-weighted scans revealed that the mass was composed of a high-intens ity area with low-intensity margins. T1-weighted magnetic resonance imaging scans obtained after intravenous gadolinium administration revealed some e nhancement at the margins. INTERVENTION: The mass lesion was totally resected. Three years after surge ry, no recurrence was observed in follow-up magnetic resonance imaging scan s. CONCLUSION: Although tumoral calcinosis is a rare cause of mass lesions of the lumbar spine, it should be considered in differential diagnoses. If the lesion can be totally resected, the prognosis should be good, similar to t hat for general tumoral calcinosis.