Clinicopathological characteristics of colon cancer diagnosed at primary health care institutions.

Background/aims: The purpose of this study was to evaluate the clinicopathologic characteristics of colon cancers detected at the SOK Sokpeynhan Internal Medical Network, a nationwide system of primary health care institutions.

Methods: We analyzed 579 colon cancer patients diagnosed using colonoscopy at the SOK network from January 2011 through December 2012. Cancers from the rectum to the splenic flexure were classified as left colon cancer.

[Clinicopathologic characteristics of superficial gastric cancer diagnosed at primary health care institutions in 2011].

Background/aims: Stomach cancer is prevalent in Korea. The purpose of this study was to evaluate the characteristics of superficial gastric cancers detected at SOK Sokpeynhan Internal Medical Network, the nationwide primary health care institutions.

Methods: We prospectively analysed the clinicopathologic and endoscopic characteristics of 218 superficial gastric cancer patients diagnosed using gastric endoscopy at SOK network from January 2011 through December 2011.

The importance of vascular endothelial growth factor in the healing of acute tympanic membrane perforation.

Purpose: The purpose of this study was to determine the more important growth factor expression between basic fibroblast growth factor (bFGF) and vascular endothelial growth factor (VEGF) in the healing of acute tympanic membrane (TM) perforation.

Materials And Methods: Bilateral perforations of the TM were created in 12 rats. The TM perforations in the right ears were treated with dexamethasone, and left ears were designated as the control group.

[A case of an intraluminal duodenal diverticulum managed with endoscopic incision and ligation using needle-knife and detachable snare].

An intraluminal duodenal diverticulum (IDD) is a rare congenital anomaly consisted of a sac-like mucosal projection within the second portion of the duodenum. Even though most of cases are asymptomatic, patients may develop recurrent abdominal pain, pancreatitis, and gastrointestinal bleeding. We report a case of symptomatic IDD which presented as acute pancreatitis and obscure gastrointestinal bleeding.

Gastrointestinal stromal tumors of the stomach: endosonographic differentiation in relation to histological risk.

Background And Aim: The aim of this study was to determine the endosonographic characteristics of gastrointestinal stromal tumors (GISTs) of the stomach according to histological risk classification.

Methods: Twenty-four cases of histologically proven c-kit positive GISTs were divided into three groups according to histological risk: low risk (n = 14), intermediate risk (n = 7) and high risk (n = 3). Endoscopic ultrasonography (EUS) features recorded were: size, ulceration, regularity of marginal border, lobulation, shape of tumor, marginal halo, homogeneity, internal echogenic or cystic foci, and the presence of exophytic development.

[The factors related to the prognosis of solitary hepatocellular carcinoma after radiofrequency ablation].

Background/aims: Several risk factors, such as size and location, are related to local recurrence after radiofrequency ablation (RFA) in the treatment of hepatocellular carcinoma (HCC). The objectives of this study were to clarify factors related to prognosis.

Methods: From October 1999 to December 2002, we performed RFA for 107 consecutive patients with solitary HCC.

N-nitration of secondary amines with 4-chloro-5-methoxy-2-nitropyridazin-3-one.

N-Nitration of 4-chloro-5-substituted-pyridazin-3-one with copper nitrate trihydrate in acetic anhydride gave the corresponding 4-chloro-2-nitro-5-substituted-pyridazin-3-one. 4-Chloro-5-alkoxy-2-nitropyridazin-3-ones such as 5-methoxy (2b) and 5-ethoxy (2d) derivatives showed excellent nitro group transfer potentiality. N-Nitration of some secondary amines with 2b gave the corresponding N-nitramines under mild neutral condition in good yields.