Junzo Hamanishi

Ovarian clear cell carcinoma (CCC) is an aggressive subtype of ovarian cancer that is resistant to conventional chemotherapy, resulting in poor prognosis. CCC develops from endometriosis, which exposes tumor cells to a hypoxic microenvironm…

[Introduction] Recent studies have revealed pervasive mutations affecting cancer-related genes in many normal tissues, including the endometrium, suggesting their role in cancer development. Endometriosis-associated ovarian cancer (EAOC) is…

A well-differentiated endometrioid carcinoma at the site of extra-uterine/ovarian endometriosis complicates the differentiation between an uncommon metastatic pattern from a corpus cancer and a synchronous primary tumor originating from adj…

OBJECTIVE: Endometriosis is associated with various symptoms, but their severity varies from case to case. In this study, we investigated the reality of symptoms presented by patients with clinically early-stage endometriosis-associated ova…

Primary peritoneal cancer has characteristics similar to high-grade serous carcinomas of ovarian and fallopian tube origin. However, the relationship between endometriosis and primary peritoneal cancer is not well understood. This study foc…

Abstract Introduction: The epithelial cells of the endometrium undergo rapid proliferation and shedding each month under the influence of estrogen and progesterone. Recent studies have demonstrated pervasive driver mutations in the endometr…

Supplementary Figure S5. Significance of STAT1-MYC activity in tumorigenesis.

Supplementary Figure S5. Significance of STAT1-MYC activity in tumorigenesis.

Clear cell carcinoma (CCC) of the ovary exhibits a unique morphology and clinically malignant behavior. The eosinophilic cytoplasm includes abundant glycogen. Although the growth is slow, the prognosis is poor owing to resistance to convent…

Polypoid endometriosis (PE) is a rare distinctive variant of endometriosis with morphological features resembling malignant tumors. Although a surgical procedure is usually performed for the treatment and diagnosis of PE, fertility preserva…

Ovarian clear cell carcinoma (CCC) exhibits an association with endometriosis, resistance to oxidative stress, and poor prognosis owing to its resistance to conventional platinum-based chemotherapy. A greater understanding of the molecular …

Ovarian seromucinous carcinoma (SMC) is an uncommon neoplasia and is composed predominantly of serous and endocervical-type mucinous epithelium. Due to its low frequency and difficult diagnosis, the natural history, characteristic imaging f…

Low-grade endometrial stromal sarcoma (LG-ESS) is a rare malignant disease and demonstrates various patterns in preoperative imaging. Therefore, accurate diagnosis is important. Given its unique form, we report a case of LG-ESS with a nodul…

Ovarian clear cell carcinoma (OCCC) is distinctive from other histological types of epithelial ovarian cancer, with genetic/epigenetic alterations, a specific immune-related molecular profile, and epidemiologic associations with ethnicity a…

Ovarian clear cell carcinoma (OCCC) is a morphologically and biologically distinct subtype of ovarian carcinomas that often arises in ovarian endometriosis. We previously reported that a unique carcinogenic environment, especially iron-indu…

PURPOSE: Endometriotic cysts are known to transform into ovarian cancers, such as clear cell and endometrioid carcinomas. We hypothesized that an iron-rich environment produced by the repetition of hemorrhage in the endometriotic cysts duri…