An appendiceal mucocele associated with inverted epithelium and submucosal hyperplasia at the appendiceal root: a rare case report.

A 54-year-old woman was referred to our hospital because of abnormal colonoscopic findings, including a submucosal protuberance at the appendiceal root. A biopsy showed no malignant findings. Computed tomography revealed a 20-mm cystic lesion with thick walls at the appendiceal root, suggestive of an appendiceal mucocele.

Appendiceal adenocarcinoma associated with Amyand's hernia: a case report.

We encountered a rare case of appendiceal carcinoma associated with Amyand's hernia, which was difficult to diagnose preoperatively. A 74-year-old man presented to our hospital with right lower abdominal pain. A hard mass was palpable in the right lower abdomen, and blood tests showed a slightly elevated inflammatory response.

Predictors of 1-year mortality after gastrectomy for gastric cancer.

Purpose: One-year mortality is important for referrals to specialist palliative care or advance care planning (ACP). This helps optimize comfort for those who cannot be cured or have a lower life expectancy. Few studies have investigated the risk factors for 1-year mortality after gastrectomy for gastric cancer (GC).

Genome sequence of sp. strain 10N, an ulvan-degrading bacterium isolated from coastal seawater collected at Ise Bay, Japan.

Genome sequence of an ulvan-degrading bacterium, sp. strain 10N, is presented. The genome is 5,358,550 bp with a G + C content of 46.

Clinical features and risk factors for appendiceal diverticulitis: a comparative study with acute appendicitis.

Purpose: Despite their similar clinical characteristics, appendiceal diverticulitis (AD) and acute appendicitis (AA) are pathologically distinct. This study compared the clinical features of AD and AA and identified relevant risk factors.

Methods: Patients who underwent appendectomy with a preoperative diagnosis of either AD or AA were categorized based on histopathological findings.

Significance of Preoperative Pulmonary Function on Short- and Long-Term Outcomes Following Gastrectomy for Gastric Cancer.

Background: Preoperative pulmonary function assessment is useful for selecting surgical candidates and operative methods and assessing the risk of postoperative pulmonary complications. However, few studies have investigated the relationship between preoperative pulmonary function and short- and long-term outcomes in patients who underwent gastrectomy for gastric cancer.

Methods: Of the 1040 patients with gastric cancer (stages I-III) who had undergone R0 gastrectomy between 2009 and 2020, 750 who underwent preoperative spirometry were included.

Long-term survivor who underwent surgical resections of repeated peritoneal oligometastases from colon cancer : a rare case report.

A 74-year-old woman underwent right hemicolectomy and partial ileal resection for ascending colon cancer with synchronous peritoneal metastasis. Histopathological examination showed moderately differentiated adenocarcinoma with mucinous component, pT4b N3 M1, and Stage IV. Postoperative chemotherapy comprising 36 courses of mFOLFOX6 with bevacizumab was administered.

Diagnosis and clinical implication of collision gastric adenocarcinomas: a case report.

Background: Collision tumors are a subtype of simultaneous tumors wherein two unrelated tumors collide or infiltrate each other. Collision gastric adenocarcinomas (CGA) are rare and difficult to diagnose, and their clinical implications remain unclear. Herein, we aimed to reveal diagnostic methods for CGA and provide insight into its implications.

Non-tumor forming and diffusely spreading invasive pancreatic cancer.

A 78-year-old man presented to our hospital with loss of appetite and epigastric discomfort. Computed tomography (CT) revealed dilation of the main pancreatic duct and three cystic lesions in the pancreatic neck, body, and tail. Endoscopic ultrasonography showed a mural nodule > 5 mm enhanced with Sonazoid in a cyst.

Isolation, Diversity and Characterization of Ulvan-Degrading Bacteria Isolated from Marine Environments.

In this study, we aimed to isolate bacteria capable of degrading the polysaccharide ulvan from the green algae sp. (Chlorophyta, Ulvales, Ulvaceae) in marine environments. We isolated 13 ulvan-degrading bacteria and observed high diversity at the genus level.

Portal vein leiomyosarcoma invading the pancreatic head.

We encountered a rare case of a pancreatic head tumor protruding into the portal vein, later diagnosed histopathologically as primary leiomyosarcoma of the portal vein. A 59-year-old woman visited our hospital because of an elevated amylase level during a medical checkup. Computed tomography showed a moderately contrasted, well-defined mass of 35-mm diameter in the pancreatic head with protrusion into the portal vein.

Superficial spreading type of early gastric cancer with diagnostic difficulty and positive surgical margin: a case report.

An 83-year-old man visited our hospital because of difficulty swallowing. Gastroscopy revealed multiple ulcers and a reddish depression in the lesser curvature of the middle stomach. The initial biopsy showed regenerative atypia, so a gastroscopy was repeated every 3 months thereafter because of suspected malignancy.

SMARCA4-deficient rectal carcinoma with a sarcomatoid component: a case report.

A new classification of SMARCA4-deficient tumors was proposed recently for thoracic malignancies, and the tumors have some histopathological characteristics similar to those of carcinosarcoma. We encountered a case of SMARCA4-deficient rectal carcinoma with a sarcomatoid component. A 46-year-old man presented to our hospital with a prolapsing anal mass.

Appendix-preserving elective herniorrhaphy for de Garengeot hernia: two case reports.

Background: Emergency appendectomy is often performed for de Garengeot hernia. However, in some cases, there may be a chance to perform an appendix-preserving elective surgery.

Case Description: A 76-year-old woman presented to our hospital with complaints of a right inguinal swelling, which we diagnosed as a de Garengeot hernia using computed tomography (CT).

Strangulating bowel obstruction due to a small intestinal knot in a case of parastomal hernia.

An intestinal knot is a rare cause of intestinal obstruction. We report a rare case of strangulating bowel obstruction due to a small intestinal knot. A 69-year-old man who had an end colostomy was admitted with severe abdominal pain and vomiting.

Optimal cutoff value of preoperative CEA and CA19-9 for prognostic significance in patients with stage II/III colon cancer.

Purpose: This unicentric, retrospective cohort study aimed to identify the optimal cutoff values of preoperative serum carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA19-9) for the prognosis in patients with stage II/III colon cancer.

Methods: After excluding 43 patients with CA19-9 levels < 0.2 U/mL, 588 were included.

Superficial spreading type of early gastric cancer coexisting with multiple hyperplastic polyps.

We encountered a rare case that involved the superficial spreading type of early gastric cancer coexisting with multiple hyperplastic polyps. An 81-year-old Japanese woman with a history of Helicobacter pylori infection was diagnosed with gastric cancer (cT1bN0M0), which presented as a wide, nodular, aggregated protrusion that was associated with multiple pedunculated and sessile polyps. Distal gastrectomy was performed, and the resected specimen involved an 8 cm × 4 cm nodular aggregated protruding lesion and 15 polyps that were 2-20 mm in size.

Mucosal prolapse syndrome-like inflammatory polyp protruding from the appendiceal orifice masquerading as an appendiceal neoplasm: A rare case report.

We describe a case of a mucosal prolapse syndrome (MPS)-like inflammatory polyp protruding from the appendiceal orifice, mimicking an appendiceal neoplasm. A 48-year-old man presented with lower abdominal pain and elevated white blood cell count and C-reactive protein level. Computed tomography showed a swollen appendix with multiple small saccular lesions and periappendiceal fat stranding and small saccular lesions in the ascending colon and cecum.

CA19-9 is a significant prognostic marker of patients with stage III gastric cancer.

Background: Due to prognostic heterogeneity within a stage of gastric cancer (GC), identification of patients with a high risk for recurrence after resection is important. We aimed to identify the prognostic significance of preoperative serum carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA19-9) levels in patients with Stage I, II, and III GC who underwent R0 gastrectomy.

Methods: A total of 794 patients were included in this study after excluding 72 patients with CA19-9 <1.

Chronological Changes in Appendiceal Pathology Among Patients Who Underwent Appendectomy for Suspected Acute Appendicitis.

Background: Given recent advances in imaging and the development of diagnostic parameters, the rate of unnecessary appendectomy (i.e., negative appendectomy) has been decreasing.

Diagnosis of appendiceal diverticulitis by multidetector computed tomography.

Purpose: Because appendiceal diverticulitis (AD) has a high risk of perforation, precise diagnosis is important for patients with suspected acute appendicitis (AA). In this study, we aimed to reveal the characteristics of computed tomography (CT) images of AD.

Methods: CT images were comparatively analyzed in patients who underwent appendectomy and had histopathologically proved AD (n = 23) or AA (n = 365) to reveal specific findings of CT image for AD and determine sensitivity and specificity of CT for AD.

Successful management of extensive bowel resection without intestinal continuity: a case report.

Patients with intestinal ischemia associated with acute aortic dissection often require emergent bowel resection, which results in serious complications. We present a case of successful surgical management of extensive bowel necrosis caused by acute aortic dissection. A 42-year-old man underwent emergent subtotal resection of the small intestine, right colectomy, tube gastrostomy, and transverse colostomy; however, intestinal continuity was not restored.

Incarcerated sigmoid colon cancer in an inguinal hernia sac associated with an abdominal wall abscess: a case report.

Background: An inguinal hernia is a common disease; however, a malignant tumor within the inguinal hernia sac is rare, and perforated colon cancer in the hernia sac is extremely rare.

Case Presentation: A 73-year-old man presented to our hospital with high fever and painful bulging of the lower abdomen. Computed tomography showed air-containing fluid in the abdominal wall, as well as localized wall thickness of the sigmoid colon in the left groin.