Table 2 Annual hemorrhage rates per patient with CM.

From: Natural course of cerebral and spinal cavernous malformations: a complete ten-year follow-up study

Parameter

Total person-years

No. of events

Annual bleeding rate (%)

All patients

910

32

3.5

Bleeding at diagnosis

490

22

4.5

DVA

260

10

3.8

BSCM

270

11

4.1

ISCM

60

4

6.7

FD

260

10

3.8

Asymptomatic

220

0

0

  1. BSCM brainstem cavernous malformation; CM cavernous malformation; DVA developmental venous anomaly; ISCM intramedullary spinal cavernous malformation.