[A case of poorly differentiated mucinous carcinoma of the gallbladder that exhibited a peculiar morphology].

A 65-year-old female presented with an elevated lesion that was identified in the gallbladder fundus via abdominal ultrasound during a medical checkup. The tumor was a pedunculated lesion, measuring 30mm in diameter, that exhibited a blood flow pattern with gradual dense staining throughout the equilibrium phase on the abdominal contrast computed tomography and a high signal intensity on T2-weighted magnetic resonance imaging. Histopathological findings revealed the proliferation of poorly differentiated adenocarcinoma, including signet ring cells, throughout the tumor along with the formation of a mucous lake.

Endoscopic ultrasonography is valuable for identifying early gastric cancers meeting expanded-indication criteria for endoscopic submucosal dissection.

Background: Endoscopic ultrasonography (EUS) has become a reliable method for predicting the invasion depth of early gastric cancer (EGC). This study evaluated the accuracy of EUS in identifying lesions meeting expanded-indication criteria for endoscopic submucosal dissection (ESD) and analyzed clinicopathologic factors influencing the diagnostic accuracy of EUS in assessing tumor invasion depth.

Methods: This study investigated 542 EGCs of 515 patients who underwent EUS pretreatment.

Therapeutic outcomes of endoscopic submucosal dissection of undifferentiated-type intramucosal gastric cancer without ulceration and preoperatively diagnosed as 20 millimetres or less in diameter.

Aim: The aim of the present study was to examine therapeutic outcomes of endoscopic submucosal dissection (ESD) of undifferentiated-type intramucosal gastric cancer and the problems of diagnosis.

Methods: We reviewed 58 patients with preoperatively diagnosed undifferentiated-type intramucosal early gastric cancer (EGC) without ulceration with a diameter of 20 mm or smaller (expanded-indication lesion) who underwent ESD at the Cancer Institute Hospital between September 2003 and August 2008.

Results: The overall rates of one-piece resection and complete resection were 98% and 90% respectively, and the median operation time was 70 min.

Significance of (18)F-2-deoxy-2-fluoro-glucose accumulation in the stomach on positron emission tomography.

Objective: To explain the accumulation of (18)F-2-deoxy-2-fluoro-glucose ((18)FDG) on positron emission tomography (PET) in the stomach and differences in its pattern, we focus on the accumulation pattern in association with endoscopic findings of the gastric mucosa and Helicobacter pylori (Hp) infection.

Methods: Of 599 cases undergoing (18)FDG-PET examinations, we retrospectively analyzed the pattern of (18)FDG accumulation in the stomach, findings of upper gastrointestinal endoscopy, and Hp infection. The pattern of (18)FDG accumulation was classified into three groups: localized accumulation only in the fornix (Group A, 32 patients), diffuse accumulation throughout the entire stomach (Group B, 49 patients), and no accumulation (Group C, 191 patients).

[A case of splenic inflammatory pseudotumor].

A 51-year-old woman who had undergone gastrectomy for advanced gastric cancer was found to have a splenic tumor during the postoperative clinical observation. Abdominal computed tomography (CT) demonstrated solitary splenic tumor 15mm in diameter with delayed contrast enhancement. Abdominal ultrasonography (US) revealed low echoic mass with enhancement at vascular and perfusion image.

[Transcatheter arterial chemoembolization (TACE) using degradable starch microspheres (DSM) (DSM-TACE) for primary and metastatic liver neuroendocrine tumors from gastrointestinal neuroendocrine tumors].

We reviewed the efficacy and complications of transcatheter arterial chemoembolization using degradable starch microspheres (DSM) for primary neuroendocrine tumors of the liver or liver metastases from gastrointestinal neuroendocrine tumors in ten patients. The rate of complete and partial response was 70.0%.