<unk>  of the renal pelvis was first described in 1960 by Hasebe et al.<unk>  is one of the most aggressive forms of cancer. KRAS mutations are found in<unk>  carcinomas. The organs involved in pathogenesis of<unk>  are ovary, appendix, pancreas, colon, rectum, retroperitoneal organs, testes, salivary gland, lung, bladder, and breast. On gross pathology, multiloculated, smooth grey surface, and multilocular mass with thin walls and<unk>  material are characteristic findings of<unk> . On microscopic histopathological analysis,<unk>  differentiation, nuclear atypia, and necrosis are characteristic findings of<unk> .<unk>  commonly affects individuals older than forty years of age. Females are more commonly affected with<unk>  of pancreas than males. Common risk factors in the development of<unk>  are obesity and post-menopausal women on hormone replacement therapy. According to the American Joint Committee on Cancer (AJCC), there are 4 stages of<unk>  based on the clinical features and findings on imaging. Each stage is assigned a letter and a number that designate the tumor size, number of involved lymph node regions, and metastasis. Findings on CT suggestive of<unk>  include rounded or ovoid tumor, internal septations, and calcification. The main mode of treatment of<unk>  is chemotherapy and radiation. The most effective treatment for<unk>  is surgical resection.
Mucinous cystadenocarcinoma
Fibroadenolipoma
Mature cystic teratoma
Ovarian fibroma
Seminoma
Signet ring cell carcinoma
Adrenolipoma
Adamantinoma