The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Tsuyoshi Arita - One of the best experts on this subject based on the ideXlab platform.

  • gastrointestinal stromal tumor of the Lesser Omentum a case report and review of the literature
    Journal of Surgical Case Reports, 2019
    Co-Authors: Shigeo Ninomiya, Kazuaki Hiroishi, Akio Shiromizu, Yoshitake Ueda, Norio Shiraishi, Masafumi Inomata, Tsuyoshi Arita
    Abstract:

    A 72-year-old woman visited our hospital for a routine health examination and underwent abdominal ultrasonography, which revealed an intra-abdominal tumor. Abdominal computed tomography and magnetic resonance imaging showed a well-defined solid mass of ~3 cm in diameter lying adjacent to the stomach. The mass was preoperatively diagnosed as gastrointestinal stromal tumor of the stomach. At laparotomy, a well-encapsulated tumor was found in the Lesser Omentum. It was slightly adherent to the stomach wall but was removed without difficulty. Therefore, only enucleation of the tumor was performed. The excised tumor, which was 35 × 30 × 25 mm3 in size, had a white cut surface without necrosis or hemorrhage. According to the pathological findings, the tumor was classified as a very low-risk gastrointestinal stromal tumor originating in the Lesser Omentum. Gastrointestinal stromal tumor of the Lesser Omentum is very rare, and surgical resection is the only effective treatment modality.

Shaihong Zhu - One of the best experts on this subject based on the ideXlab platform.

Shigeo Ninomiya - One of the best experts on this subject based on the ideXlab platform.

  • gastrointestinal stromal tumor of the Lesser Omentum a case report and review of the literature
    Journal of Surgical Case Reports, 2019
    Co-Authors: Shigeo Ninomiya, Kazuaki Hiroishi, Akio Shiromizu, Yoshitake Ueda, Norio Shiraishi, Masafumi Inomata, Tsuyoshi Arita
    Abstract:

    A 72-year-old woman visited our hospital for a routine health examination and underwent abdominal ultrasonography, which revealed an intra-abdominal tumor. Abdominal computed tomography and magnetic resonance imaging showed a well-defined solid mass of ~3 cm in diameter lying adjacent to the stomach. The mass was preoperatively diagnosed as gastrointestinal stromal tumor of the stomach. At laparotomy, a well-encapsulated tumor was found in the Lesser Omentum. It was slightly adherent to the stomach wall but was removed without difficulty. Therefore, only enucleation of the tumor was performed. The excised tumor, which was 35 × 30 × 25 mm3 in size, had a white cut surface without necrosis or hemorrhage. According to the pathological findings, the tumor was classified as a very low-risk gastrointestinal stromal tumor originating in the Lesser Omentum. Gastrointestinal stromal tumor of the Lesser Omentum is very rare, and surgical resection is the only effective treatment modality.

Akira Kakita - One of the best experts on this subject based on the ideXlab platform.

  • a primary solitary tumor of the Lesser Omentum with immunohistochemical features of gastrointestinal stromal tumors
    The American Journal of Gastroenterology, 1998
    Co-Authors: Tsuyoshi Takahashi, Sadahito Kuwao, Masatomo Yanagihara, Akira Kakita
    Abstract:

    We here present a primary solitary tumor of the Lesser Omentum that was found in a 71-yr-old woman. Differential diagnosis could not be made preoperatively; therefore, histopathological examination including immunohistochemical studies were performed to determine the nature of the tumor. The resected specimen, measuring 17 cm at the largest point, consisted of the outer solid part and the inner multiloculated cysts. Microscopically, the tumor was characterized by interlacing bundles of elongated spindle cells, with the nuclei focally showing a palisading pattern. However, skeinoid fibers were not observed anywhere. One to three mitoses per 50 high power fields were observed. Immunohistochemically, the tumor was negative for S-100 protein and smooth muscle-specific actin, but stained positive for CD34. The microscopic features were consistent with those of potentially malignant gastrointestinal stromal tumors. Stromal tumors that represent the differentiation toward neither typical leiomyomas or schwannomas rarely occur in the Lesser Omentum with only one such instance having been reported to date. Due to this rarity, it is difficult to make the differential diagnosis preoperatively, even with existing imaging techniques, and predicting the clinical behavior of such omental tumors is also often difficult. Therefore, complete resection should be performed when such tumors are encountered in daily practice.

Toshiyuki Kitai - One of the best experts on this subject based on the ideXlab platform.

  • laparoscopic resection of abdominal cystic lymphangioma derived from Lesser Omentum case report
    Medicine, 2020
    Co-Authors: Yuhei Hamaguchi, So Arita, Naoko Sugimoto, Osamu Inamoto, Hidekazu Takagi, Masafumi Kogire, Toshiyuki Kitai
    Abstract:

    Rationale Cystic lymphangiomas are uncommon congenital malformations that originate from lymphatic channels. Lymphangiomas frequently appear in the head, neck, and axillary regions of children. Abdominal cystic lymphangiomas are extremely rare, having a reported incidence of 1 in 20,000 to 250,000. Patient concerns A 50-year-old female patient was admitted to our hospital with a cough that had persisted for several weeks. Abdominal ultrasonography incidentally revealed a multilocular cystic lesion in the Lesser curvature of the stomach. Diagnosis Preoperative findings indicated that the lesion was cystic lymphangioma. However, the possibility of a pancreatic tumor could not be completely excluded. Interventions Laparoscopy revealed a multilocular cyst in the Lesser curvature of the stomach. The gastrocolic ligament was divided, and the body and tail of the pancreas was exposed in the omental bursa, showing that the cystic lesion was not derived from the pancreas but from the Lesser Omentum. Although it was located directly beside the left gastric artery, the cyst was enucleated and totally resected laparoscopically without sacrificing the artery. Outcomes The cystic lesion was histopathologically diagnosed as an abdominal cystic lymphangioma originating from the Lesser Omentum. The patient was discharged on the postoperative day 4 without complications. Lessons Preoperative imaging cannot completely distinguish abdominal cystic lymphangiomas from other types of cystic tumors. Because cystic lymphangiomas have the potential to grow, invade vital structures, and develop life-threatening complications, laparoscopic assessment followed by total resection is considered a useful treatment strategy for peripancreatic cystic lesions.