[A case of peripheral T-cell lymphoma with lung involvement]

Peripheral T-cell lymphoma (PTCL) is a rare tumor that originates in mature T cells or NK cells. PTCL is extremely rare in the lungs, either as a primary or secondary lesion, and the clinical course usually progresses rapidly, resulting in a poor prognosis. This article reported a case of a 35-year-old young female patient who was diagnosed with PTCL by percutaneous lung puncture pathology. The patient was admitted to the hospital due to cough and sputum. Chest CT scan revealed multiple patchy, high-density shadows and scattered nodules of varying sizes in both lungs. The patient was admitted to the hospital for suspected tuberculosis. The patient underwent enhanced chest CT scan and a percutaneous lung puncture biopsy. According to the results of histopathology and immunohistochemistry, the patient was finally diagnosed with PTCL. The patient eventually died of septic shock after chemotherapy. This result revealed the complexity of lung lesions. PTCL is difficult to diagnose in the early stage and is prone to misdiagnosis and missed diagnosis.