spinal cord disorder obsolete disorder of medulla oblongata syringomyelia https://rarediseases.info.nih.gov/diseases/7725/syringomyelia https://www.malacards.org/card/syringomyelia NORD:1755 Orphanet:3280 MEDGEN:21449 GARD:0007725 NCIT:C85179 MESH:D013595 Syringomyelia is characterized by cerebrospinal fluid (CSF)-filled cavities (syrinx) inside the spinal cord, either as a result of a known cause (secondary syringomyelia, SS) or, more rarely, due to an unknown cause (primary syringomyelia, PS). icd11.foundation:1161887622 UMLS:C0039144 SCTID:111496009 NANDO:1200506 NANDO:1200507 hydromyelia DOID:327 MedDRA:10042928 MONDO:0017987