نتایج جستجو برای: primary retroperitoneal

تعداد نتایج: 649921  

2009
Shingo Ukita Masafumi Koshiyama Megumi Ohnaka Naoyuki Miyagawa Yukio Yamanishi Fumitomo Nishimura Michikazu Nagura Tomoko Kim Masaya Hirose Tomoyuki Shirase Hisato Kobayashi Hiroshi Ozasa

Retroperitoneal benign lipomas are extremely rare and represent about 2.9% of all primary retroperitoneal tumors. About 80% of the tumors in the retroperitoneal cavities are malignant neoplasms. We experienced a case of a retroperitoneal lipoma simulating an ovarian mature cystic teratoma. A diagnosis was correctly made by magnetic resonance imaging (MRI) prior to surgery, and a total tumorecto...

Journal: :Archivos espanoles de urologia 2007
David Parada Karla B Peña Otto Moreira Iván Cohen Arelí M Parada Luis D Mejías

OBJECTIVE Primary extragonadal germ cell tumors are rare and their histogenetic origin is not clear. We describe two cases presenting as primary retroperitoneal germ cell tumors without clinical evidence of testicular tumor. METHODS A 21 and 18 years-old patients presented retroperitoneal choriocarcinoma and yolk sac tumor, respectively. In both cases, testicular palpation was not suspicious ...

Journal: :Journal of Evolution of Medical and Dental Sciences 2020

2015
Megumi Manrai Naoki Takesita Hiroaki Ishida Akiko Takashima Tomohiro Adachi Izumi Sasaki Kei Yokokawa Wataru Tokuyama Nobuyuki Hiruta Toshihiko Kinoshita

Primary retroperitoneal mucinous cystic tumors with borderline malignancy are rarely encountered. To date, only 12 cases have been reported in the literature. In this report, we present an additional case. A 65-year-old nulliparous woman complained of abdominal fullness. Her medical history included a hysterectomy and a single salpingo-oophorectomy performed 25 years prior to the present event....

2011
Hideo Soga Akihisa Yao Kei Matsushita Hiroyoshi Shimogaki Gaku Kawabata

BACKGROUND Inflammatory pseudotumors were mostly encountered in the lung. Retroperitoneal inflammatory pseudotumors are relatively rare. Although laparoscopic surgery with a modified flank position is widely performed for retroperitoneal tumors, we placed the patient in the supine position to maintain the normal anatomical view of the retroperitoneal space. We report a case of retroperitoneal i...

Journal: :JAMA: The Journal of the American Medical Association 1901

Journal: :ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo) 2014

2010
Guillermo Sangster Daniel Do Carlos Previgliano Benjamin Li Delecia LaFrance Maureen Heldmann

Paragangliomas are extra-adrenal tumors of the autonomic nervous system and may be found within the skull base, neck, chest, and abdomen. When presenting within the abdominal cavity, they may arise as a primary retroperitoneal neoplasm and can mimic vascular malformations or other conditions related to specific retroperitoneal organs such as the pancreas, kidneys, or adrenals. Retroperitoneal p...

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