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Thoracic SMARCA4-deficient undifferentiated tumor.
Yukina Izumi1, Yuko Sano1, Kaori Yamada1
1Department of Diagnostic Radiology, Japanese Red Cross Kyoto Daiichi Hospital, Kyoto, Japan.
Radiology Case Reports
|April 11, 2025
Summary
Thoracic SMARCA4-deficient undifferentiated tumor (SMARCA4-UT) is a rare cancer. Early diagnosis and understanding its aggressive nature are vital for patient outcomes.
Area of Science:
- Oncology
- Pathology
- Genetics
Background:
- Thoracic SMARCA4-deficient undifferentiated tumor (SMARCA4-UT) is defined by undifferentiated rhabdoid morphology and SMARCA4 gene deficiency.
- Classified as an epithelial tumor in the 2021 WHO update due to genetic links with smoking-related lung cancer.
Observation:
- A case study of a 44-year-old male presenting with a rapidly growing mediastinal mass.
- Imaging via chest radiography and CT confirmed the presence of the tumor.
Findings:
- The SMARCA4-UT demonstrated resistance to standard treatments including radiation therapy, chemotherapy, and immune checkpoint inhibitors.
- The patient's prognosis was poor, with a survival time of approximately 5 months.
Implications:
- Highlights the aggressive nature and limited treatment options for thoracic SMARCA4-UT.
- Emphasizes the critical need for increased awareness of clinical and imaging features for timely diagnosis and treatment planning.
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