Department of Obstetrics & Gynecology, Kizawa Memorial Hospital, Minokamo City, Japan - Articles

Primary Small Cell Neuroendocrine Carcinoma of the Endometrium: A Cytologically Diagnosed Case with Immunocytochemical, Immunohistochemical, and Electron Microscopic Features (Articles)

Kentaro Nagata, Kenji Niwa, Sakae Mori, Keigo Kuwabara, Motoki Takenaka, Yoshio Yamaguchi, Kentaro Niwa, Takuji Tanaka

Open Journal of Pathology Vol.10 No.4，September 14, 2020

DOI: 10.4236/ojpathology.2020.104011 706 Downloads 2,790 Views Citations
Primary Serous Cystadenocarcinoma of Broad Ligament: A Case Report with Laparoscopic, Histopathologic and Immunohistochemical Findings (Articles)

Kenji Niwa, Motoki Takenaka, Takeaki Saitake, Tiger Koike, Kentaro Nagata, Kentaro Niwa, Kohjiro Niwa, Sakae Mori, Keigo Kuwabara, Akane Onogi, Takuji Tanaka

Open Journal of Pathology Vol.12 No.1，December 13, 2021

DOI: 10.4236/ojpathology.2022.121003 236 Downloads 1,475 Views Citations
Asymptomatic Anisakiasis of the Colon Diagnosed and Treated by Colonoscopy (Articles)

Tomoshi Takeda, Kenji Niwa, Akie Sano, Atsunori Kodama, Kuninori Hatasa, Yasunari Matsuno, Masao Kagami, Motoki Takenaka, Kohjiro Niwa, Takuji Tanaka

Case Reports in Clinical Medicine Vol.9 No.9，September 21, 2020

DOI: 10.4236/crcm.2020.99041 558 Downloads 1,922 Views Citations
Primary Endometrial High Grade Neuroendocrine Carcinoma: A Case Report with Cytological, Histopathological and Immunohistochemical Features (Articles)

Kazuhiro Kobayashi, Masashi Matsuyama, Fumimasa Etori, Naomi Kawaguchi, Kyoko Nambu, Asuka Sekiya, Yuka Hiraku, Kazushige Yamamoto, Naoki Watanabe, Tetsuya Yamada, Takuji Tanaka

Open Journal of Pathology Vol.5 No.1，January 9, 2015

DOI: 10.4236/ojpathology.2015.51001 4,370 Downloads 5,629 Views Citations
Extensive Subcutaneous Emphysema and Ventilatory Failure during Gynecologic Laparoscopic Surgery: A Case Report (Articles)

Kentaro Niwa, Kenji Niwa, Hirokazu Yamada, Yuzu Iwakaki, Yusuke Amaya, Sayaka Fujiwara, Hideaki Tsuyoshi, Makoto Orisaka, Yoshio Yoshida

Case Reports in Clinical Medicine Vol.14 No.7，July 16, 2025

DOI: 10.4236/crcm.2025.147044 22 Downloads 127 Views Citations
Follow-Up of HPV Clearance after LEEP Conization and Vaporization for CIN2⁺, and Vaporization for VaIN2 (Articles)

Kenji Niwa, Saki Tsurue, Rui Kyogoku, Masanori Isobe, Yoh Hayasaki, Sakae Mori, Keigo Kuwabara, Kentaro Niwa, Takuji Tanaka

Open Journal of Pathology Vol.15 No.3，July 8, 2025

DOI: 10.4236/ojpathology.2025.153013 21 Downloads 104 Views Citations
Surgical strategy in case with co-existence of malignant oligodendroglioma and arteriovenous malformation: A case report (Articles)

Hirohito Yano, Noriyuki Nakayama, Naoyuki Ohe, Toshinori Takagi, Jun Shinoda, Toru Iwama

Case Reports in Clinical Medicine Vol.2 No.8，November 14, 2013

DOI: 10.4236/crcm.2013.28125 3,606 Downloads 5,542 Views Citations
Antenatal Diagnosis of Uterine Incarceration: Surgical Role of MRI and Intraoperative Transmyometrium Ultrasound (Articles)

Masahito Mizuuchi, Sakura Takada, Masahiro Suzuki, Shin-ichi Ishioka, Toshiaki Endo, Tsuyoshi Saito

Open Journal of Obstetrics and Gynecology Vol.4 No.16，December 23, 2014

DOI: 10.4236/ojog.2014.416149 3,402 Downloads 4,361 Views Citations
Lumbar Disc Herniation with End-Plate Fracture and Secondary Ossification Mimicking an Epidural Tumor: A Case Report (Articles)

Koun Yamauchi, Akira Hioki, Kazunari Fushimi, Kei Miyamoto, Katsuji Shimizu

Open Journal of Orthopedics Vol.3 No.2，June 6, 2013

DOI: 10.4236/ojo.2013.32020 4,345 Downloads 6,308 Views Citations
Hidden renal disease in a female patient with long-lasting isolated gestational proteinuria followed by hypertension (Articles)

Kosuke Kawabata, Rina Akaishi, Ayako Nozaki, Osamu Sato, Kaoru Hanatani, Hisanori Minakami

Open Journal of Obstetrics and Gynecology Vol.3 No.9，November 27, 2013

DOI: 10.4236/ojog.2013.39124 4,166 Downloads 5,787 Views Citations
Primary Fallopian Tube Adenocarcinoma Discovered with the Vaginal Cytology: A Case Report with Pathological and Immunohistochemical Investigation (Case Report)

Tomoko Honda, Yuka Hiraku, Ryogo Aoki, Kenji Niwa, Naoki Watanabe, Takuji Tanaka

Open Journal of Pathology Vol.8 No.3，July 13, 2018

DOI: 10.4236/ojpathology.2018.83010 1,229 Downloads 2,610 Views Citations
Actual Use of Rigid Hysteroscope Intrauterine BIGATTI Shaver (IBS^®) with a Morcellator System (Articles)

Toshiyuki Kakinuma, Kaoru Kakinuma, Ayano Shimizu, Takahum Okusa, Eri Suizu, Masataka Kagimoto, Masaki Abe, Koyomi Saito, Michitaka Ohwada, Nobuhiro Takeshima, Kaoru Yanagida

Open Journal of Obstetrics and Gynecology Vol.11 No.11，November 17, 2021

DOI: 10.4236/ojog.2021.1111140 183 Downloads 1,684 Views Citations
A case of a patient positive for anti-cardiolipin antibodies with recurrent fetal wastage and cerebral infarction who was successfully treated with Sairei-to, low dose aspirin, and heparin (Articles)

Taro Nonaka, Makoto Chihara, Izumi Ooki, Masaki Tamura, Takumi Kurabayashi, Koichi Takakuwa

Open Journal of Obstetrics and Gynecology Vol.2 No.4，November 20, 2012

DOI: 10.4236/ojog.2012.24082 4,269 Downloads 6,594 Views Citations
Primary Ovarian Carcinosarcoma: Cytological, Pathological, Immunocytochemical, and Immunohistochemical Features (Articles)

Kenji Niwa, Sakae Mori, Keigo Kuwabara, Kentaro Nagata, Motoki Takenaka, Tomomi Shiga, Yoshio Yamaguchi, Kentaro Niwa, Takuji Tanaka

Open Journal of Pathology Vol.11 No.1，January 21, 2021

DOI: 10.4236/ojpathology.2021.111003 665 Downloads 1,925 Views Citations
Congenital Dysfibrinogenemia Presented with Massive Hematomas Formed after Hysterectomy (Articles)

Kenji Niwa, Kentaro Nagata, Takefumi Nakagami, Ryuichiro Shimaoka, Kentaro Niwa, Motoki Takenaka, Takuji Tanaka, Nobuo Okumura

Case Reports in Clinical Medicine Vol.10 No.4，April 22, 2021

DOI: 10.4236/crcm.2021.104013 387 Downloads 1,243 Views Citations
Primary Urethral Malignant Melanoma in an Elder Woman Diagnosed by Urine Cytology (Case Report)

Kenji Niwa, Tsuneo Ishihara, Sakae Mori, Keigo Kuwabara, Saki Murase, Motoki Takenaka, Yoshio Yamaguchi, Takuji Tanaka

Open Journal of Pathology Vol.10 No.1，December 31, 2019

DOI: 10.4236/ojpathology.2020.101002 655 Downloads 1,715 Views Citations
Umbilical Endometriosis without Pelvic Surgery (Articles)

Kenji Niwa, Yusuke Mizuno, Ryuichiro Yano, Yoko Ueda, Nozomi Narikawa, Takuji Tanaka

Open Journal of Pathology Vol.4 No.4，October 10, 2014

DOI: 10.4236/ojpathology.2014.44022 2,937 Downloads 3,864 Views Citations
Metastatic Carcinoma of the Uterine Cervix from Rectal Carcinoma: A Case Report and Review of the Literature (Articles)

Motoki Matsuura, Masato Tamate, Masahiro Suzuki, Tasuku Mariya, Sakura Takada, Yuta Tabuchi, Mizue Teramoto, Seiro Satohisa, Ryoichi Tanaka, Masahiro Iwasaki, Kaori Fukunaka, Noriyoshi Fukunaka, Satoshi Tanaka, Tsuyoshi Saito

Open Journal of Obstetrics and Gynecology Vol.4 No.10，July 15, 2014

DOI: 10.4236/ojog.2014.410085 2,895 Downloads 4,269 Views Citations
Uterotonic drugs use for post partum hemorrhage: An audit of the third stage of labor management (Articles)

Etedafe P. Gharoro, Ehigha J. Enabudoso, Edafe E. Gharoro, Abieyuwa P. Osemwenkha

Open Journal of Obstetrics and Gynecology Vol.3 No.3，May 8, 2013

DOI: 10.4236/ojog.2013.33065 4,061 Downloads 7,168 Views Citations
Evaluation of ovarian cysts in adolescents (Articles)

Jessica R. Zolton, Priya B. Maseelall

Open Journal of Obstetrics and Gynecology Vol.3 No.7A，September 16, 2013

DOI: 10.4236/ojog.2013.37A1004 9,974 Downloads 14,188 Views Citations
This article belongs to the Special Issue on Current Diagnosis and Management of Ovarian Cysts

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