brain disorder intracranial hypotension https://github.com/monarch-initiative/mondo/issues/9097 https://www.malacards.org/card/intracranial_hypotension MedDRA:10049977 ICD9:349.89 EFO:1000993 UMLS:C0524812 MESH:D019585 SCTID:433691000124104 MEDGEN:141851 MONDO:0006811 ICD10CM:G96.81 icd11.foundation:363695674 DOID:4723 Reduction of cerebrospinal fluid pressure characterized clinically by headache which is maximal in an upright posture and occasionally by an abducens nerve palsy (see abducens nerve diseases), neck stiffness, hearing loss (see deafness); nausea; and other symptoms. This condition may be spontaneous or secondary to spinal puncture; neurosurgical procedures; dehydration; uremia; trauma (see also craniocerebral trauma); and other processes. Chronic hypotension may be associated with subdural hematomas (see hematoma, subdural) or hygromas. (From Semin Neurol 1996 Mar;16(1):5-10; Adams et al., Principles of Neurology, 6th ed, pp637-8)