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World Health Organization Classification of Side Effects After the Treatment with 131I
| Leukopenia | WBC |
|---|---|
| Grade 1 | Lower normal laboratory limit |
| Grade 2 | 2000–3000/μL |
| Grade 3 | 1000–2000/μL |
| Grade 4 | Below 1000/μL |
| Grade 5 | Death |
| Thrombocytopenia | PLT |
|---|---|
| Grade 1 | 75,000–150,000/μL |
| Grade 2 | 50,000–75,000/μL |
| Grade 3 | 25,000–50,000/μL |
| Grade 4 | Below 25,000/μL |
| Grade 5 | Death |
Source: Van Nostrand and Freitas (13).
