Symptom Information: Sort according to HPO 

1
 (HPO:0002334) Abnormality of the cerebellar vermis Occasional [Orphanet] 137 / 7739
2
 (HPO:0002664) Neoplasm Occasional [Orphanet] 111 / 7739
3
 (HPO:0002435) Meningocele Occasional [Orphanet] 23 / 7739
4
 (HPO:0002383) Encephalitis Occasional [Orphanet] 41 / 7739
5
 (HPO:0001305) Dandy-Walker malformation Occasional [Orphanet] rare [HPO:skoehler] 79 / 7739
6
 (HPO:0000708) Behavioral abnormality Occasional [Orphanet] 212 / 7739
7
 (HPO:0002353) EEG abnormality Occasional [Orphanet] 188 / 7739
8
 (HPO:0002861) Melanoma Occasional [Orphanet] 18 / 7739
9
 (HPO:0006824) Cranial nerve paralysis Occasional [Orphanet] 81 / 7739
10
 (HPO:0002536) Abnormal cortical gyration Occasional [Orphanet] 72 / 7739
11
 (HPO:0002308) Arnold-Chiari malformation Occasional [Orphanet] 42 / 7739
12
 (HPO:0003396) Syringomyelia Occasional [Orphanet] rare [HPO:skoehler] 16 / 7739
13
 (HPO:0001072) Thickened skin Very frequent [Orphanet] 87 / 7739
14
 (HPO:0004374) Hemiplegia/hemiparesis Occasional [Orphanet] 158 / 7739
15
 (HPO:0001250) Seizures Very frequent [Orphanet] 1245 / 7739
16
 (HPO:0000995) Melanocytic nevus Very frequent [Orphanet] 63 / 7739
17
 (HPO:0004936) Venous thrombosis Occasional [Orphanet] 41 / 7739
18
 (HPO:0000953) Hyperpigmentation of the skin Very frequent [Orphanet] 75 / 7739
19
 (HPO:0002170) Intracranial hemorrhage Occasional [Orphanet] 40 / 7739
20
 (HPO:0000510) Rod-cone dystrophy Occasional [Orphanet] 266 / 7739
21
 (HPO:0002119) Ventriculomegaly Occasional [Orphanet] 253 / 7739
22
 (HPO:0001268) Mental deterioration 88 / 7739
23
 (HPO:0005603) Numerous congenital melanocytic nevi 1 / 7739
24
 (HPO:0008678) Renal hypoplasia/aplasia Occasional [Orphanet] 127 / 7739
25
 (OMIM) Giant pigmented nevi, often in lumbosacral distribution 1 / 7739
26
 (OMIM) Melanosis of pia-arachnoid 1 / 7739
27
 (OMIM) Leptomeningeal melanoma 1 / 7739
28
 (HPO:0001522) Death in infancy Occasional [Orphanet] 275 / 7739
29
 (HPO:0012758) Neurodevelopmental delay Very frequent [Orphanet] 949 / 7739
30
 (HPO:0000479) Abnormality of the retina Occasional [Orphanet] 74 / 7739
31
 (HPO:0011362) Abnormal hair quantity Very frequent [Orphanet] 92 / 7739
32
 (HPO:0001965) Abnormality of the scalp Very frequent [Orphanet] 10 / 7739
33
 (HPO:0000238) Hydrocephalus rare [HPO:skoehler] 278 / 7739
34
 (HPO:0001263) Global developmental delay rare [HPO:skoehler] 853 / 7739
35
 (HPO:0002858) Meningioma rare [HPO:skoehler] 22 / 7739
36
 (HPO:0003745) Sporadic 131 / 7739
37
 (HPO:0100702) Arachnoid cyst rare [HPO:skoehler] 15 / 7739
38
 (HPO:0200022) Choroid plexus papilloma rare [HPO:skoehler] 2 / 7739