Fig. 7

A 45-day-old male infant presented with lower back wide deep cutaneous dimple (crater) with small, discolored swelling mildly enlarging with straining shown in A. B, C Axial and Sagittal T2WI showing left para midline subcutaneous cystic lesion (Asterix) at level of S1/S2 vertebrae with a fibrous tract seen extending deeply passing though S2 spinal bifida into spinal canal. D Sagittal T2WI showing termination of conus medullaris at level of mid L4 vertebral body, hypointense tract is seen traceable in CSF space and separately identified till its attachment in dorsal aspect of conus medullaris (white arrow). E Sagittal T1WI showing tiny hyperintense focus on left side of conus medullaris representing intradural lipoma (white arrow). F Axial USG image at level of tip of conus medullaris showing small echogenic well defined fatty lesion representing intradural lipoma (white arrow). G Sagittal USG image at level of upper S1/S2 vertebral level showing subcutaneous cystic lesion with hypoechoic fibrous tract extending deeply into spinal canal. H Sagittal USG image showing level of termination of conus medullaris at mid L4 vertebral body level. I M mode USG image at level of L5 showing absence of oscillation of cauda equina nerve roots denoting tethered cord. Type of spinal dysraphism: Transitional form of LDM with tethered cord and intradural lipoma