Table 1

Clinical features and site of lesions in 18 patients with NF1 with 23 symptomatic plexiform neurofibromas

No	Sex	Age	Site of lesion	Pain	Increase in size	Neurological deficit (sensory and motor impairment)
1	F	49	Prevertebral at L1	Yes	Not visible^1-150	Yes
2	M	37	Pelvis	Yes	Not visible^1-150	No
3	F	19	L brachial plexus	Yes	Not visible^1-150	Yes
4	F	23	L thigh	Yes	Yes	Yes
			R lower limb	Yes	Yes	No
5	F	41	L thigh	Yes	Yes	No
			L axilla	Yes	Yes	No
6	M	62	R thigh	Yes	Yes	Yes
7	M	22	L thigh (medial)	Yes	Yes	Yes
			L thigh (post.)	Yes	Yes	Yes
8	F	26	L supraclavicular fossa	Yes	Yes	Yes
9	F	35	L buttock	Yes	Yes	No
10	F	34	R lower limb	Yes	Yes	No
11	F	12	R thigh	No	Yes	No
12	F	27	L popliteal fossa	Yes	Yes	Yes
13	M	14	R cervical region	Yes	Yes	No
14	M	24	Pelvis	No	Yes	Yes
15	M	14	L popliteal fossa	Yes	Yes	Yes
16	M	26	Retroperitoneum,	No	not visible^1-150	Yes
			R popliteal fossa	No	Yes	Yes
			L popliteal fossa	No	Yes	Yes
17	F	22	L upper limb	Yes	Yes	No
18	M	15	R lower limb	No	Yes	Yes

↵1-150 Indicates plexiform neurofibromas not visible on the body surface.
Pain was a feature in 17 of 23 tumours;. increase in size was present in 19 of 19 visible tumours; neurological deficit was present in 14 out of 23 tumours.