Table 4: Orphan diseases among a cohort of 175 Patients with an Intracranial Aneurysm: Unruptured intracranial aneurysm (UIA); SAH: Sub arachnoidal haemorrhage; FPP: French population prevalence; F: Female; M: Male.
| N° | Diagnosis | FPP | Sex | Group |
| 9 | Lupus erythematosus disease | 1/2000 | F | UIA |
| 37 | Ehler danlos syndrome | 1/10000 | F | UIA |
| 41 | Klinefelter syndrome | 1/1500 | M | UIA |
| 68 | Distilben induced uterine hypoplasia | 4/100000 | F | SAH |
| 94 | Recklinghausen's disease | 1/10000 | F | SAH |
| 113 | Narcolepsy | 1/M | F | SAH |
| 131 | Charcot marie tooth disease | 1/10000 | M | SAH |
| 132 | Moya Moya disease | 1/32000 | M | SAH |
| 141 | Alzheimer's disease < 50 yrs | 1/200000 | M | SAH |
| 152 | Mesencephalic angioma | 1/1000 | M | SAH |
| 153 | Hemophilia A | 1/10000 | M | SAH |
| 159 | Rare congenital thrombophilia | 1/50000 | M | SAH |
| 169 | Double orifice right ventricle plus pulmonary atresia | 1/10000 | M | SAH |