myelocystocele saccular spinal dysraphism with a stalk to the dome terminal myelocystocele https://www.malacards.org/card/terminal_myelocystocele UMLS:C5816718 MEDGEN:1853147 GARD:0027094 Orphanet:645337 MONDO:0970962 A rare closed spinal dysraphism characterized by a myelocystocele at the termination of the spinal cord. It may be an isolated anomaly or be associated with other defects, including sacral agenesis, anorectal and genitourinary anomalies. The conus is not identifiable. The myelocystocele sac may have a significant lipomatous component (terminal lipomyelocystocele).