Somatic PTPN11 Mutation in a Child With Neuroblastoma and Protein Losing Enteropathy

Area of Science:

• Oncology
• Gastroenterology
• Genetics

Background:

• Neuroblastoma is a common childhood cancer.
• Protein losing enteropathy (PLE) is a gastrointestinal disorder characterized by excessive protein loss.
• The co-occurrence of neuroblastoma and PLE is rare and poorly understood.

Observation:

• This report details the sixth known case of PLE in a pediatric patient diagnosed with neuroblastoma.
• This is the first documented instance where genetic information was available for a patient with both conditions.
• Tumor DNA analysis identified a mutation in the PTPN11 gene.

Findings:

• The PTPN11 gene mutation is recognized in both neuroblastoma and Noonan syndrome.
• Noonan syndrome is a genetic disorder where neuroblastoma and PLE have been independently reported.
• Constitutional DNA in this patient was found to be normal, indicating the mutation was likely specific to the tumor.

Implications:

• This case provides a potential genetic link between neuroblastoma and protein losing enteropathy.
• Further genetic studies in similar patients are necessary to confirm the association.
• Understanding this link may improve diagnostic and therapeutic strategies for affected children.