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| Progressions | Progressions to advanced SM | P-value (ISM vs CM) | |||
|---|---|---|---|---|---|
| ISM (n = 1083) | Typical ISM (n = 653) | 4.9% | 4.1% | 2.9% <.001 | |
| BMM (n = 377) | 1.7% | ||||
| SMM (n = 53) | 9.4% | ||||
|
| |||||
| CM (n = 242) | 1.7% | 0 | |||
Abbreviations: BMM, bone marrow mastocytosis; CM, cutaneous mastocytosis; ISM, indolent systemic mastocytosis; SMM, smoldering systemic mastocytosis.
