Prostatic Adenocarcinoma Metastatic to Pleomorphic Liposarcoma, a “Collision Phenomenon”: Report of a Case with Review of Pelvic Collision Tumors
Figure 3
Image Plate I. (a) Gross image of the pelvic mass resection. The mass was large, well circumscribed, nonencapsulated and yellow-pink with an attached segment of large intestine. (b) Cellular area of the tumor, comprised of large cells with enlarged, highly pleomorphic, and vesicular nuclei with distinct nucleoli and abundant, clear to eosinophilic cytoplasm, with scattered bizarre multinucleated tumor giant cells. The stroma appears hyalinized with delicate branching capillary network. (Hematoxylin & eosin, original magnification ×200.) (c) Scattered lipoblasts in a variably cellular background. (Hematoxylin & eosin, original magnification ×400.) (d) Highly cellular area of tumor showing plexiform network of delicate capillaries, admixed tumor cells, and rare lipoblast. (Hematoxylin & eosin, original magnification ×200.) (e) Glandular tumor aggregate comprised of variably sized acini (left), scattered in a hyalinized stroma. Interface with the liposarcoma component (right) is clearly seen. (Hematoxylin & eosin, original magnification ×40.) (f) Close-up view of the prostatic carcinoma showing well formed acini and inspissated eosinophilic luminal secretion. The acini are intricately admixed with the bizarre tumor giant cells of the liposarcoma in a myxoid to hyalinized stroma.
