Table 5.
Frequency of mutations in genes involved in alternative mRNA splicing recurrently found in systemic mastocytosis.
| Gene | SM Prognostic Subgroup | Mutated Cases/ Total Cases (%) |
Overall Frequency |
WHO Subtype |
Mutated Cases/ Total Cases (%) |
Overall Frequency |
|
|---|---|---|---|---|---|---|---|
| SF3B1 | Non-AdvSM | 2/309 (0.6) [12] 0/10 (0) [13] 0/44 (0) [29] 0/26 (0) [68] 0/6 (0) [85] |
0.5% | BMM | 1/90 (1) [12] | 1% | |
| ISM | 1/211 (0.5) [12] 0/44 (0) [29] 10/4 (0) [85] |
0/3 (0) [13] 0/26 (0) [68] | 0.3% | ||||
| SSM | 0/8 (0) [12] 0/2 (0) [85] |
0/7 (0) [13] | 0% | ||||
| AdvSM | 0/13 (0) [12] 3/24 (13) [13] 9/106 (9) [29] 18/305 (6) [32] 2/83 (2) [68] 1/13 (8) [85] |
7% | ASM | 0/9 (0) [12] 1/25 (4) [29] 0/1 (0) [85] |
2/11 (18) [13] 0/3 (0) [68] |
6% | |
| SM-AHN | 0/4 (0) [12] 7/80 (9) [29] 1/12 (8) [85] | 1/13 (8) [13] 2/72 (3) [68] |
6% | ||||
| MCL | 1/1 (100) [29] | 0/8 (0) [68] | 13% | ||||
| SRSF2 | Non-AdvSM | 0/12 (0) [10] 0/309 (0) [12] 0/10 (0) [13] 0/44 (0) [29] 0/1 (0) [50] 0/26 (0) [68] 0/6 (0) [85] 7/530 (1) [97] |
0.7% | BMM | 0/90 (0) [12] | 0% | |
| ISM | 0/10 (0) [10] 0/3 (0) [13] 0/1 (0) [50] 0/4 (0) [85] | 0/211 (0) [12] 0/44 (0) [29] 0/26 (0) [68] | 0% | ||||
| SSM | 0/2 (0) [10] 0/7 (0) [13] |
0/8 (0) [12] 0/2 (0) [85] |
0% | ||||
| AdvSM | 14/27 (52) [10] 2/13 (15) [12] 3/24 (13) [13] 1/106 (1) [29] 120/329 (37) [32] 8/25 (32) [50] 31/83 (37) [68] 4/13 (31) [85] 79/210 (38) [97] |
32% | ASM | 0/1 (0) [10] 0/11 (0) [13] 1/2 (50) [50] 0/1 (0) [85] |
1/9 (11) [12] 0/25 (0) [29] 0/3 (0) [68] |
4% | |
| SM-AHN | 13/23 (57) [10] 3/13 (23) [13] 7/21 (33) [50] 4/12 (33) [85] |
1/4 (25) [12] 1/80 (1) [29] 31/72 (43) [68] |
27% | ||||
| MCL | 1/3 (33) [10] 0/2 (0) [50] | 0/1 (0) [29] 0/8 (0) [68] | 7% | ||||
Overall frequencies represent the weighted average of the percentage of patients with at least one mutation in that gene out of the total number of patients studied within the different cohorts for each subgroup of SM. Abbreviations: AdvSM: advanced systemic mastocytosis (SM); ASM: aggressive SM; BMM: bone marrow mastocytosis; ISM: indolent SM; MCL: mast cell leukaemia; Non-AdvSM: non-advanced SM; SM-AHN: SM with an associated haematological neoplasm; SSM: smouldering SM.