Primary Ewing sarcoma/primitive neuroectodermal tumor of the lung.

Area of Science:

• Oncology
• Pulmonology
• Pathology

Background:

• Ewing sarcoma is a rare bone and soft tissue cancer.
• Primary lung Ewing sarcoma is exceptionally rare, often presenting with aggressive symptoms.

Observation:

• A 42-year-old male presented with acute respiratory distress, fever, and chest pain.
• Imaging revealed a large unilateral lung mass causing tracheal deviation and superior vena cava obstruction.
• Despite two biopsy attempts suggesting malignancy, the patient experienced rapid deterioration.

Findings:

• Autopsy demonstrated complete replacement of the right lung by a necrotic tumor.
• Histopathology confirmed primary Ewing sarcoma of the lung.
• Other visceral organs were grossly unremarkable.

Implications:

• Highlights the importance of considering rare diagnoses in aggressive respiratory conditions.
• Underscores the diagnostic challenges and poor prognosis of primary lung Ewing sarcoma.
• Emphasizes the role of autopsy in diagnosing rare and rapidly fatal conditions.