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We report two very unusual observations in which gas and fluid effusions were transiently and unexpectedly found in the extravertebral spaces of patients presenting with painful necrotic vertebral collapse containing a vacuum cleft. We hypothesize that gas and/or fluid which progressively may replace vacuum in vertebral compression fractures could be secondarily pumped through extravertebral and retroperitoneal spaces. Although being rare, these observations may represent a potential missing link in the imaging snapshots of the cyclic and dynamic vacuum phenomenon.

jbr-btr

Extravertebral gas and fluid effusions associated with vertebral collapse containing a vacuum cleft possibly result from a pumping phenomenon: a new evidence of the dynamic hydro-pneumatical nature of the so-called vacuum phenomenon