Peripheral Primitive Neuroectodermal Tumor: A Rare Case in Pediatrics.

Area of Science:

• Oncology
• Pediatric Pathology
• Medical Imaging

Background:

• Primitive neuroectodermal tumors (PNETs) are aggressive malignancies originating from neuroectodermal cells, affecting both soft tissues and bone.
• PNETs represent approximately 4% of all diagnosed cancers in pediatric and adolescent populations.
• The clinical presentation and histology of PNETs can vary significantly based on tumor location.

Observation:

• A five-year-old boy presented with acute gastrointestinal symptoms including vomiting, hematemesis, abdominal pain, and distention.
• Physical examination revealed hepatomegaly, and imaging studies demonstrated a massively enlarged liver with heterogeneous echotexture.
• Bone marrow aspiration and biopsy indicated heavy infiltration by monomorphic cells, suggestive of metastatic disease.

Findings:

• Liver biopsy confirmed metastatic undifferentiated neuroblastoma, a type of peripheral primitive neuroectodermal tumor (pPNET).
• Despite initial investigations, the patient experienced rapid clinical deterioration.
• The case underscores the challenge in diagnosing pPNETs, particularly when presenting as primary liver masses in children.

Implications:

• Peripheral primitive neuroectodermal tumors (pPNETs) should be included in the differential diagnosis for pediatric liver masses.
• Early and accurate diagnosis of pPNETs is crucial for timely intervention and potentially improving patient survival rates.
• This case emphasizes the importance of comprehensive diagnostic workup for unexplained abdominal symptoms and hepatomegaly in children.