| Mild DM1 | 50-150 repeats |
| Classic DM1 | 100-500 repeats |
| Congenital/Childhood DM1 | 750-2000+ repeats[@nih] |
| Normal | < 26 CCTG repeats |
| Affected | 75-11,000+ repeats[@biomedical] |
| Proximal muscle weakness | Quadriceps and hip flexors primarily affected[@biomedical] |
| Myotonia | Less prominent, often subclinical[@biomedical] |
| Less severe cardiac involvement | Compared to DM1[@biomedical] |
| Later onset | Typically fourth decade or later[@biomedical] |
| Minimal cognitive impairment | Compared to DM1[@biomedical] |
| Painless myalgias | Muscle pain, especially in thighs[@biomedical]### Inheritance |
| Databases | OMIMOrphanetClinicalTrialsPubMed |
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