PT - JOURNAL ARTICLE AU - Fahad M. Al-Hameed TI - Saddle pulmonary embolus and bronchiolitis obliterans with organizing pneumonia develop simultaneously after first cyclophosphamide, methotrexate, 5FU chemotherapy for breast cancer AID - 10.15537/smj.2015.6.11305 DP - 2015 Jun 01 TA - Saudi Medical Journal PG - 747--750 VI - 36 IP - 6 4099 - http://smj.org.sa/content/36/6/747.short 4100 - http://smj.org.sa/content/36/6/747.full SO - Saudi Med J2015 Jun 01; 36 AB - A 62-year-old woman underwent a right mastectomy with axillary node dissection for a poorly differentiated ductal carcinoma. One month later, she underwent a left nephrectomy for a renal cell carcinoma. Two weeks after, she received her first cycle of cyclophosphamide, methotrexate, and 5FU (CMF) as a part of her breast cancer treatment. We describe an unusual case of non-occlusive saddle pulmonary embolus with extensive bilateral deep vein thrombosis and severe bronchiolitis obliterans with organizing pneumonia developing simultaneously after the first CMF chemotherapy for breast cancer.