Quantitative Ultrasound of Proximal Phalanxes in Childhood Acute Lymphoblastic Leukemia Survivors

Area of Science:

• Pediatric Oncology
• Bone Metabolism
• Medical Imaging

Background:

• Reduced bone mineral density (BMD) is a significant complication in survivors of childhood acute lymphoblastic leukemia (ALL).
• The optimal method for assessing BMD in this population remains under investigation.
• Childhood ALL survivors may experience long-term skeletal health issues.

Purpose of the Study:

• To evaluate the utility of quantitative ultrasound (QUS) for assessing BMD in childhood ALL survivors.
• To explore correlations between BMD measurements and treatment variables (steroids, cytotoxic agents).
• To identify factors influencing bone health in long-term survivors of childhood ALL.

Main Methods:

• A cohort of 72 childhood ALL survivors underwent BMD assessment using QUS.
• Quantitative ultrasound parameters, specifically amplitude-dependent speed of sound z-score, were analyzed.
• Statistical analysis was performed to correlate QUS z-scores with age at diagnosis, follow-up duration, and cumulative doses of treatment agents.

Main Results:

• The mean amplitude-dependent speed of sound z-score was -1.22±1.19, with 13.8% of survivors having a z-score below -2 SD.
• A negative correlation was observed between QUS z-score and age at diagnosis (P=0.01).
• A positive correlation was found between QUS z-score and the length of follow-up (P=0.01); no correlation with cytotoxic drugs was found.

Conclusions:

• Quantitative ultrasound (QUS) is a radiation-free and effective method for assessing bone mineral density (BMD) in pediatric patients, including survivors of childhood ALL.
• Bone impairment in childhood ALL survivors is influenced by the disease itself and the timing of diagnosis during critical bone growth phases.
• Increased awareness and improved monitoring strategies are crucial for managing skeletal complications in childhood ALL survivors.