Spontaneous splenic rupture in atypical (Philadelphia chromosome negative) chronic myeloid leukaemia following blastic crisis

Philadelphia chromosome negative and bcr/abl negative chronic myeloid leukaemia (CML) is an uncommon atypical CML. We describe a patient with this disorder who experienced an acute blastic transformation that resulted in rapid splenic enlargement and subsequent atraumatic splenic rupture. Clinically, spontaneous splenic rupture may be a difficult diagnosis to make and this case highlights the importance of considering atraumatic splenic rupture as a cause for unexplained abdominal pain in a patient with a haematological malignancy.