Jejunogastric intussusception after pancreaticoduodenectomy: a case report.

Background: Jejunogastric intussusception (JGI) is a rare, but potentially fatal complication that can occur following gastric surgery, and the reported incidence of JGI is as low as 0.1%. Early diagnosis and treatment are critical for JGI to prevent major complications such as bowel necrosis and death.

Stoma creation is associated with a low incidence of midline incisional hernia after colorectal surgery: the "fighting over the fascia" theory concerning the incision and stoma hole.

Purpose: Parastomal hernia (PH) develops more frequently than incisional hernia (IH) after colorectal surgery with stoma. This study evaluated our hypothesis that inward traction of the fascia when closing a midline incision widens the stoma hole and increases the incidence of PH.

Methods: A total of 795 patients who underwent colorectal resection between 2006 and 2016 were retrospectively analyzed.

The carcinoembryonic antigen ratio is a potential predictor of survival in recurrent colorectal cancer.

Background: The carcinoembryonic antigen (CEA) "value" itself is often useless in patients with a normal CEA level at initial presentation and those with tumor-irrelevant elevated CEA. Although the unified marker using CEA has been desirable for recurrent tumor staging as well as for primary tumor staging, little is known concerning its relationship with the survival of patients with recurrent colorectal cancer in particular.

Methods: This retrospective historical study included patients who experienced disease relapse after curative surgery for stage I-III colorectal cancer between 2006 and 2018.

Indications for neoadjuvant treatment based on risk factors for poor prognosis before and after neoadjuvant chemotherapy alone in patients with locally advanced rectal cancer.

Introduction: The oncological benefit of neoadjuvant chemotherapy (NAC) alone for locally advanced rectal cancer (LARC) remains controversial. The aim of this study was to clarify the clinical risk factors for poor prognosis before and after NAC for decision making regarding additional treatment in patients with LARC.

Materials And Methods: We examined a total of 96 patients with MRI-defined poor-risk locally advanced mid-low rectal cancer treated by NAC alone between 2006 and 2018.

[A Case of Ascending Colon Cancer with Synchronous Unresectable Liver Metastasis Maintaining a Long-Term Stable Disease State after Discontinuing Chemotherapy].

A 73-year-old woman presenting with weight loss was diagnosed as having ascending colon cancer with synchronous liver metastasis. The liver metastasis was solitary but it occupied the medial and anterior segments. The size was over 9 cm in diameter and was located adjacent to the left, middle, and right hepatic veins, making it initially unresectable.

Theoretical Stable Hydraulic Section based on the Principle of Least Action.

Despite decades of effort, stable hydraulic geometry for an open channel water flow has hardly been established because of too many unknown variables for too few rational relationships. This article derives the most efficient channel cross section using calculus of variations for the given flow area at the minimum wetting perimeter length, which is equivalent to the principle of least action. Analysis indicates that water can most efficiently flow in a semi-ellipse section channel with minimum friction and erosion.