Case No | Age (y)—sex | Test situation | Clinical examination | Repeat size |
1 | 19—M | Normal | 350 | |
2 | 23—M | Percussion and grip myotonia | 300 | |
3 | 29—M | Equivocal clinical features | 150 | |
4 | 33—F | Mother of affected child | Grip and percussion myotonia, mild facial and hand weakness | 150 |
5 | 33—F | Mother of affected child | Grip myotonia, slight facial weakness | 150 |
6 | 37—F | Mother of affected child | Delayed relaxation of grip | Smear: 300–400 |
7 | 37—M | Normal | 200 | |
8 | 39—M | Normal | 60 | |
9 | 47—F | Mother of affected child | Normal | 80 |
10 | 48—F | Mother of affected child | Weakness at wrists | 150 |
11 | 52—M | Normal | 80 | |
12 | 61—M | Grandparent | Diabetes, cataract, some stiffness in hands | 65 |
13 | 65—M | Father of affected adult son | Bilateral cataract | 100 |
14 | 69—F | Grandparent | Normal | 67 |
15 | 75—F | Grandparent | Normal | 80 |
16 | 84—F | Grandparent | Cataract | 75 |
M = male, F = female.