Detection of the JAK2V617F mutation with the Ipsogen MutaScreen kit: absence of JAK2V617F does not mean absence of myeloproliferative neoplasm

To the editor: We have analyzed with great interest the recent correspondence by Warshawsky et al describing 2 cases of myeloproliferative neoplasms (MPNs) where the Ipsogen MutaScreen kit failed to identify JAK2 V617F mutations when another variant was present.[1][1] These variants were, however,