Background. The treatment of acute leukemia in childhood has been increasingly successful. Concurrently, severe leukemia-related gastrointestinal complications have become more common.
Methods. We evaluated the findings of the abdominal ultrasound (US) examinations of 52 children with acute lymphoblastic leukemia (ALL) who had severe clinical symptoms indicating infection or abdominal complication during chemotherapy treatment or after the cessation of such treatment and assessed the impact of these findings on patients' subsequent treatment and survival.
Results. Our study presents ten cases of typhlitis with a prevalence of 9%, all of which were rapidly diagnosed by US and had a favourable outcome. We also found focal intra-abdominal parenchymal lesions in six children, five of them due to fungal infection and one due to leukemic infiltration. Several other intraabdominal pathologies significant for the patients' treatment are also reported.
Discussion. We believe that abdominal US is a useful, rapid, safe, and accurate imaging method for children with ALL suspected to suffer from leukemia-or chemotherapy-related gastrointestinal complications. More invasive imaging methods are seldom needed.
Conclusions. According to our results, abdominal US gives the necessary information in most of the cases and provides prompt diagnosis, which may prevent possible fatal com-