Neuroblastoma: a specific sonographic tissue pattern.

Area of Science:

• Pediatric Radiology
• Oncology

Background:

• Diagnosing neuroblastoma in children often relies on imaging, but characteristic sonographic findings have been inconsistent.
• Previous studies yielded diverse results regarding specific ultrasound features for neuroblastoma.

Purpose of the Study:

• To identify a distinctive sonographic appearance that could be characteristic of neuroblastoma in pediatric abdominal masses.
• To evaluate the specificity of a unique sonographic finding in differentiating neuroblastoma from other neoplasms.

Main Methods:

• Retrospective review of sonograms from 53 abdominal tumors, including 10 neuroblastomas, imaged between 1982 and 1986.
• Correlation with computed tomography (CT) scans in select cases.
• Histopathological analysis of tumor tissues.

Main Results:

• A distinctive sonographic "lobule" of increased echogenicity was observed in 4 out of 10 neuroblastoma cases.
• This lobule was attributed to the tumor's growth pattern, not specific cell type, and was not differentiated by CT.
• Histologically, the lobule comprised uniform neuroblastoma cells without hemorrhage, necrosis, or calcification, a pattern not seen in other analyzed neoplasms like Wilms' tumors.

Conclusions:

• The identified sonographic "lobule" appears to be a specific indicator for neuroblastoma when detected in pediatric abdominal masses.
• This sonographic sign offers a valuable diagnostic clue for neuroblastoma in children presenting with abdominal tumors.