Primary Synovial Sarcoma of the Lung

Area of Science:

• Oncology
• Pulmonary Medicine
• Pathology

Background:

• Primary pulmonary sarcomas are rare, with synovial sarcoma being an exceptionally uncommon subtype.
• Early diagnosis and characterization are crucial for effective management of thoracic malignancies.

Observation:

• A 19-year-old male presented with constitutional symptoms and chest pain, exhibiting a large perihilar lung mass on imaging.
• Radiological evaluation including CT and MRI revealed a heterogeneous mass with specific signal characteristics.
• Biopsy confirmed monophasic synovial sarcoma, a spindle cell sarcoma with characteristic genetic translocations (X;18).

Findings:

• The tumor demonstrated a significant response to neoadjuvant chemotherapy, evidenced by decreased size and metabolic activity on 18F FDG PET/CT.
• Histopathological examination post-resection confirmed high-grade spindle cell sarcoma consistent with monophasic synovial sarcoma.
• Cytogenetic analysis identified the specific X;18 translocation, confirming the diagnosis.

Implications:

• This case highlights the importance of a multidisciplinary approach in diagnosing and managing rare thoracic tumors.
• Effective treatment strategies combining chemotherapy, advanced imaging, and surgical resection can yield positive outcomes.
• Understanding the imaging and pathological features is vital for accurate diagnosis and prognosis of pulmonary synovial sarcoma.