The cohort was composed of 32 pediatric patients.

Cerebrovascular complications were observed in 20% of patients with cerebral MRI scans. These included microinfarcts, and intracranial artery stenosis, which was primarily detected in major and proximal cerebral vessels.

Skeletal complications included 46% of bone infarctions. These were most commonly observed in long bones, including the femur, humerus, and tibia. MRI findings often showed serpiginous sclerotic regions and subperiosteal hemorrhages, highlighting the extent of damage (Fig. 1). Osteomyelitis was detected in 22% of patients, affecting similar regions.

Abdominal organ complications included splenic and hepatic sequestration. Splenic sequestration was identified in 18.8% of patients using ultrasound and CT, which showed characteristic findings such as sudden splenomegaly, hypo- or iso-echoic infarcted regions, and areas of reduced vascular perfusion.(Fig.2) Hepatic sequestration, observed in some cases, was characterized by a "starry sky" appearance on ultrasound, attributed to hypoechoic parenchyma and hyperechoic bile ducts. Additionally, hepatic infarctions and fibrosis were detected using MRI, which revealed parenchymal changes suggestive of chronic liver damage.

ACS was diagnosed in 31.3% of patients through CT imaging. It presented with radiographic findings including ground-glass opacities, pleural effusions, and areas of consolidation predominantly in the lower lung lobes (Fig.3). This condition was associated with hypoxemia and a significant increase in hospitalization rates.

The main causes for hospitalization were, in order of frequence, skeletal complications, cerebrovascular complications and ACS.