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Acute fibrinous and organizing pneumonia (AFOP) is an unusual pathological pattern which is characterized by intra-alveolar deposition of fibrin (fibrin ball) and organizing pneumonia in a scattered distribution, and the pathological diagnosis plays an irreplaceable role in the diagnosis. Most Patients cannot confirm etiology, till now, known etiology included connective tissue disease, infection, environmental and occupational exposure, drugs, organ transplant, and tumor. It can be divided into acute and subacute subtype according to the extent of progress. The most common symptoms of AFOP were fever, cough, and dyspnea. Bilateral consolidations and ground-glass opacities (GGO) usually can be seen on chest CT images. At present, the treatment protocol for AFOP has not reached a consensus Glucocorticoid, immunosuppressants, stem cell transplantation or lung transplantation may contribute to improved clinical outcome. Here, we report a case of AFOP with myelodysplastic syndrome and pneumocystis jiroveci pneumonia (PJP). After treatments of glucocorticoid, immunosuppressant, chemotherapy, antibiotics and blood transfusion, the patient's clinical symptoms, peripheral blood test, and imaging findings were obviously improved. In this case, we consider the AFOP was caused by MDS and the immunodeficiency after chemotherapy lead to secondary PJP. This typical case highlights the importance of appropriate therapy for coexisted diseases of those patients with refractory AFOP.

Acute fibrinous and organizing pneumonia with myelodysplastic syndrome and pneumocystis jiroveci pneumonia: a case report