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t(8;22)(p11;q11) is a rare but recurrent genetic alteration in various hematological disorders. Patients with t(8;22)(p11;q11) may be misdiagnosed with chronic myelogenous leukemia (CML), due to the similar clinical features. Thus, the current study presents a patient with t(8;22)(p11;q11) who was previously misdiagnosed with CML in the chronic phase. The current patient was a 26-year-old woman who was 4-weeks pregnant and in whom an increased white blood cell count (4.0×10 10 /l) was found upon physical examination. The patient had no history of hematological disease. Although cytogenetics showed a normal karyotype and no breakpoint cluster region/Abelson murine leukemia viral oncogene homolog 1 (BCR/ABL) fusion gene was detected by reverse transcription-polymerase chain reaction, a diagnosis of chronic myelogenous leukemia (CML) was initially made according to the clinical and morphological features. Another 6 weeks later, t(8;22)(p11;q11) rearrangement was present in 9 out of 10 analyzed metaphases. Fluorescence in situ hybridization and reverse transcription-polymerase chain reaction indicated a negative result for the BCR/ABL fusion, but gave a positive result for the BCR-fibroblast growth factor receptor 1 fusion. A hematological diagnosis of atypical CML was again formed.

Chronic myelogenous leukemia-like hematological malignancy with t(8;22) in a 26-year-old pregnant woman: A case report