[Hepatic echinococcosis that required 11 years for a definitive diagnosis: a case report].

A woman in her 80s underwent computed tomography that revealed a 22-mm-sized unilocular mass in segment 4 of her liver. The mass grew to 26mm at the 4-year follow-up and to 36mm at the 11-year follow-up, becoming a multilocular mass that invaded the bile duct. At this point, the patient was diagnosed with hepatic echinococcosis based on a serological examination and oral albendazole treatment was initiated.

[A case of systemic amyloidosis presenting with gastric emphysema].

The patient was an elderly woman in her 80s. Upper and lower gastrointestinal endoscopies were conducted as a thorough analysis for cardiac amyloidosis, revealing no abnormal findings. A mucosal biopsy, however, resulted in an amyloid AA-type amyloidosis diagnosis.

Nasal breathing is superior to oral breathing when performing and undergoing transnasal endoscopy: a randomized trial.

BACKGROUND : Transnasal endoscopy presents a technical difficulty when inserting the flexible endoscope. It is unclear whether a particular breathing method is useful for transnasal endoscopy. Therefore, we conducted a prospective randomized controlled trial to compare endoscopic operability and patient tolerance between patients assigned to nasal breathing or oral breathing groups.

Successful Treatment of Advanced Gastric Cancer with Brain Metastases through an Abscopal Effect by Radiation and Immune Checkpoint Inhibitor Therapy.

The abscopal effect refers to the phenomenon in which local radiotherapy is associated with the regression of metastatic cancer that is distantly located from the irradiated site. Here, we present a case of a patient with advanced gastric cancer and brain metastases who was successfully treated with brain radiotherapy and anti-programmed death-1 (PD-1) therapy-induced abscopal effect. Although anti-PD-1 therapy alone could not prevent disease progression, the metastatic lesions in the brain and also in the abdominal lymph node showed a drastic response after brain radiotherapy and anti-PD-1 therapy.

[Effect of adding X-ray examination to endoscopy in the assessment of the invasion depth of early gastric cancer].

In the assessment of invasion depth of early gastric cancer (EGC), the effect of adding X-ray examination to endoscopy was retrospectively investigated in 84 EGC lesions diagnosed at our hospital, including 62 differentiated and 22 undifferentiated lesions. Overall diagnostic accuracy was 75% with endoscopy and 82.1% when X-ray examination was performed in addition to endoscopy.

[A case of duodenal neuroendocrine carcinoma composed of small- and large-cell types].

A 78-year-old man underwent a detailed examination by upper gastrointestinal endoscopy for the complaint of epigastric pain. The examination revealed a hemicircumferential type 2 tumor in the descending duodenum. A subsequent biopsy led to a diagnosis of neuroendocrine carcinoma.

[A case of synchronous quintuple gastric cancer with large-cell endocrine carcinoma].

The patient was a 73-year-old man who visited our department with black stools as the chief complaint. Upper digestive tract endoscopy revealed three type 2 lesions in the lesser curvature of the gastric antrum and the gastric angle and the posterior wall of the upper gastric body, which were diagnosed by biopsy as tub2, por, and sig, respectively. Total gastrectomy was performed.

[A case of mixed adenoneuroendocrine carcinoma of the stomach].

A 71-year-old man who tested positive in a pepsinogen test also underwent upper gastrointestinal endoscopy. A 0-IIc lesion was identified at the posterior wall of the antrum. Biopsy findings indicated endocrine cell carcinoma.

Multiple Cancers of the Biliary Tract and Pancreatic Duct after Cholecystectomy for Gallbladder Cancer in a Patient with Pancreaticobiliary Maljunction.

We herein report the rare case of a 76-year-old woman who underwent cholecystectomy with bile duct resection for advanced gallbladder cancer associated with pancreaticobiliary maljunction (PBM) and subsequently developed multiple cancers of the pancreaticobiliary system (the distal bile duct, intrahepatic duct and pancreatic duct) after the operation. We performed conventional endoscopic retrograde cholangiopancreatography (ERCP) using a side-viewing scope to evaluate the masses in the distal bile duct and the pancreatic duct. We also performed ERCP using double-balloon enteroscopy (DBE) to observe the mass in the intrahepatic duct.

[A case of large cell neuroendocrine carcinoma of the rectum].

A 77-year-old woman was referred to our hospital because of blood in feces and anal pain. Colonoscopy revealed a villous semicircular tumor in the rectum. A biopsy showed well-differentiated adenocarcinoma.