Table 1 UK case details—human dura mater.

Case	Surgical procedure	Dura	Year of surgery	Year of death	Incubation period (Months)	Duration of illness (Months)
I, Esmonde et al12	Suboccipital craniotomy and C1/2 laminectomy for cerebellar ectopia and syringomyelia	?	1969	1979	104*	6
II, Esmonde et al12	Excision of a left temporal cortex meningioma	L	1983	1991	93*	5*
III	Repair surgical leak after acoustic neuroma excision	L	1985	1989	51	2
IV, Willison et al13	Posterior fossa decompression and cervical laminectomy for cerebellar ectopia or syringomyelia	L	1985	1989	45*	4
V	Excision of a left parietal cortex meningioma	1:L	1985	1993	1:86	11
		2:L	1986		2:79
VI	Excision of a cerebellar astrocytoma	L	1986	1997	103	33
VII	Excision of an eosinophilic granuloma right frontal region skull	L	1987	2003	177	5
Porcine dura graft:
VIII	Excision of a right frontoparietal meningioma	P	1988	2000	134	3

*Revised from previously published figures.

L, Lyodura; P, Porcine dura.