Sarcomatoid carcinoma arising in the pulmonary artery

Background Sarcomatoid carcinoma is a rare and aggressive malignancy with a poor prognosis, capable of arising in diverse tissues. Pulmonary artery sarcomatoid carcinoma is particularly uncommon and highly invasive. Case Presentation We present the case of a 40‐year‐old male who experienced dry cough and dyspnea, and was subsequently diagnosed with a mass obstructing the bilateral main pulmonary artery, predominantly involving the left main branch shortly after contracting COVID‐19. Histopathological analysis of a lung biopsy and positron emission tomography (PET) scan confirmed the diagnosis of sarcomatoid carcinoma involving the bilateral main pulmonary artery. Following six cycles of combined chemotherapy and immunotherapy, the patient's condition remained relatively stable. Conclusion This case report aims to discuss the clinical presentation, diagnostic approach, and therapeutic management of this rare condition, thereby contributing to the broader understanding of sarcomatoid carcinoma.