Furthermore, histology revealed differences in the androgen receptors in the prostate and emboli, with significantly greater Ki-67 expression in the emboli than in the prostate.<h4>Conclusion</h4>Prostate cancer proliferated in the pulmonary artery after hematogenous metastasis, caused vascular occlusion, and formed microscopic pulmonary tumor embolisms. This evidence concerns the gene MKI67 and prostate carcinoma.