What are the acquired causes of pulmonary embolism?

OCPs with 3rd generation progestins are most important cause of thrombosis in young women (increases within 4 months of using, and decreases 3 months after the cessation) Contraceptive transdermal patches and rings as well Immobilization, congestive failure, medications (tamoxifen, bevaczumab, thalidomide...), antiphospholipid antibody syndrome, myeloproliferative disorder, polycythemia vera...) IBD, nephrotic disease, macroglobulinemia, multiple myeloma leukocytosis, SCA, HIV