Symptom Information: Sort according to HPO 

1
 (HPO:0001332) Dystonia Occasional [Orphanet] 197 / 7739
2
 (HPO:0000597) Ophthalmoparesis Occasional [Orphanet] 71 / 7739
3
 (HPO:0002486) Myotonia Very frequent [Orphanet] 29 / 7739
4
 (HPO:0003198) Myopathy Occasional [Orphanet] 151 / 7739
5
 (HPO:0003326) Myalgia Occasional [Orphanet] 143 / 7739
6
 (HPO:0002093) Respiratory insufficiency Occasional [Orphanet] 410 / 7739
7
 (HPO:0001288) Gait disturbance Frequent [Orphanet] 318 / 7739
8
 (HPO:0001276) Hypertonia Very frequent [Orphanet] 317 / 7739
9
 (HPO:0002015) Dysphagia Frequent [Orphanet] 301 / 7739
10
 (HPO:0001324) Muscle weakness Occasional [Orphanet] 859 / 7739
11
 (HPO:0002153) Hyperkalemia Occasional [Orphanet] 25 / 7739
12
 (HPO:0003712) Skeletal muscle hypertrophy Occasional [Orphanet] 42 / 7739
13
 (HPO:0003457) EMG abnormality Very frequent [Orphanet] 78 / 7739
14
 (HPO:0100748) Muscular edema Occasional [Orphanet] 2 / 7739
15
 (HPO:0100749) Chest pain Occasional [Orphanet] 92 / 7739
16
 (HPO:0003394) Muscle cramps Very frequent [Orphanet] 106 / 7739
17
 (HPO:0003552) Muscle stiffness 23 / 7739
18
 (HPO:0010307) Stridor 19 / 7739
19
 (OMIM) Apnea, episodic, neonatal 6 / 7739
20
 (OMIM) Laryngospasm, neonatal 4 / 7739
21
 (OMIM) Myotonia, potassium-sensitive (may be responsive to acetazolamide) 4 / 7739
22
 (OMIM) Muscle weakness usually does not occur 4 / 7739
23
 (OMIM) Cold sensitivity has been reported 4 / 7739
24
 (OMIM) EMG in myotonia permanens shows continuous myotonic activity 4 / 7739
25
 (OMIM) Serum creatine kinase may be increased 6 / 7739
26
 (HPO:0000763) Sensory neuropathy Occasional [Orphanet] 78 / 7739
27
 (HPO:0030089) Abnormal muscle fiber protein expression Occasional [Orphanet] 64 / 7739