Gastric cancer of unusual presentation, the importance of differential diagnosis.

We present the case of a 67-year-old male smoker with no medical history of interest. Admitted to Neurology for frontal headache, unsteady gait, temporospatial disorientation and vomiting. Laboratory tests (including vitamin B12, folic acid, lues) and cranial CT scan were normal, encephalogram compatible with diffuse encephalopathy and lumbar puncture with a finding of leptomeningeal carcinomatosis.

with Gastroduodenal Involvement and Complicated with SIADH: An Unusual Diagnosis to Consider in Immunosuppressed Patients with Hyperemesis and Eosinophilia.

is an intestinal nematode that colonizes and reproduces in the upper small intestinal mucosa. Infection in immunocompetent hosts is self-limited but in immunocompromised patients it can be complicated and cause hyperinfection. We present a 60-year-old female who was admitted due to an exacerbation of acquired thrombotic thrombocytopenic purpura requiring high doses of corticosteroids.

Proctitis in men having sex with men: anything else you can think of?

We report two cases of proctitis in men having sex with men.

Endothelin-1 as a Mediator of Heme Oxygenase-1-Induced Stemness in Colorectal Cancer: Influence of p53.

Heme oxygenase-1 (HO-1) is an antioxidant protein implicated in tumor progression, metastasis, and resistance to therapy. Elevated HO-1 expression is associated with stemness in several types of cancer, although this aspect has not yet been studied in colorectal cancer (CRC). Using an in vitro model, we demonstrated that HO-1 overexpression regulates stemness and resistance to 5-FU treatment, regardless of p53.

Lemmel syndrome: an uncommon complication of periampular duodenal diverticulum.

Lemmel's syndrome consists of obstructive jaundice due to compression of a periampular duodenal diverticulum (DDP), in the absence of choledocholithiasis or tumor. DDP are pseudodiverticula without a muscle layer within a radius of 2-3 centimeters from the ampulla of Vater. They rarely cause obstructive jaundice, although the prevalence is estimated at up to 22 % according to the sensitivity of the diagnostic test.

Intestinal spirochetosis: normal intestinal flora or etiology of diarrhea?

A 22-year-old male began with up to 12 loose stools per day, with mucus and no blood. They were present for two months, even during the night. Moreover, he complained of abdominal pain and weight loss.

It seems like cholangiocarcinoma but it is not: discovering the choledochal cyst.

A 52-year-old female was referred for a study of a left intrahepatic bile duct dilation with an initial suspicion of Klatskin. Analytically, there was no cholestasis and tumor markers were negative. On echoendoscopy, there was dilation of the intrahepatic bile duct to the confluence at the level of the left hepatic lobe, with no evidence of a lesion that could be biopsied by fine needle aspiration (FNA).

Splenic rupture as an endoscopic complication: as rare as it appears?

The case was an 86-year-old male with multiple cardiovascular comorbidites, including anticoagulated atrial fibrillation, who underwent a colonoscopy due to acute lower gastrointestinal bleeding and anemia. Colonoscopy only showed some small angiodysplasias in the cecum. A few hours later, the patient presented with abdominal pain and hemodynamic instability.

Gastroparesis secondary to pulmonary vein cryoablation: a factor to consider.

We present a patient who underwent cryoballoon ablation for symptomatic atrial fibrillation, with gastroparesis five days later. The case was resolved with conservative measures such as prokinetics. The case was a 72-year-old female with a history of symptomatic paroxysmal atrial fibrillation treated with edoxaban.

Subcapsular hepatic hematoma as a complication of ERCP: what do we know about its etiology?

We present the case of a 79-year-old male who underwent endoscopic retrograde cholangiopancreatography (ERCP) after cholangitis. The papilla was rigid and the biliary tract was dilated with sharpening of the distal bile duct, with no obvious cause. There was no bile flow after sphincterotomy, no stone after sweeping the duct with a balloon and the brush did not expand properly when trying to obtain cytologic material.

Gastrointestinal tuberculosis, the great simulator. From inflammatory disease to a tumor.

A 52-year-old Senegalese male presented due to abdominal pain and fever, with findings suggestive of a stenosing tumor of the right colon. Biopsies during colonoscopy were compatible with adenocarcinoma and infiltration into neighboring organs was observed during the surgery. New biopsies were taken that did not show dysplasia but granulomatous foci that were suggestive of a non-filiated infection.

Digestive involvement in a patient with Lambert-Eaton syndrome.

We present the case of a 50-year-old male diagnosed with myasthenia gravis, secondary to thymoma or Lambert-Eaton syndrome during the study of repeated vomiting. Gastrointestinal symptoms persisted despite the treatment of the thymoma. He suffered from sigma volvulus that required sigmoidectomy 9 years after diagnosis.

Apropos of a case of pancreatic lymphoepithelial cyst: importance of the preoperative diagnosis by ecoendoscopy.

The case was a 75-year-old female with dyspeptic symptoms of a 2 month duration. There was a polycystic lesion at the level of the uncinate pancreatic process of 44 x 42 x 34 mm on abdominal ultrasound and MRI, which caused a slight dilation of the main pancreatic duct. EUS was performed that identified a multicystic formation of 25x36 mm in the pancreatic body and FNA was performed of the lesion.

Enteroscopic diagnosis of intestinal malabsorption of a rare etiology: diaphragm disease.

We present the case of a 59-year-old patient with malabsorption syndrome which started with polyneuropathy. Capsule endoscopy and enteroscopy show villous denudation. Histological study confirms diaphragm disease of the small bowel.

Enteroscopy in the diagnosis of melanoma metastases.

We present abdominal computed tomography and enteroscopy images of a 48-year-old male patient with a previous melanoma who presented with epigastric pain. The pain was not controlled with medical management. Abdominal computed tomography and a histological study of biopsies form enteroscopy confirmed the diagnosis of metastatic melanoma.

Atrophic enteropathy refractory to a gluten-free diet: what should we consider?

Olmesartan is an angiotensin II receptor antagonist used for the treatment of blood hypertension. Long-term use has been associated with diarrhea and sometimes intestinal involvement may mimic enteropathies such as celiac disease. Clinicians should consider drugs within the differential diagnosis of enteropathies.

A positive clinical experience of a long-term treatment pattern with leukocyte apheresis and Adacolumn in ulcerative proctitis.

Ulcerative proctitis (UP) is often involved in the diagnosis of inflammatory bowel disease (IBD). The increase of leukocytes and pro-inflammatory factors in peripheral blood and in the active forms, as well as the infiltration of neutrophils and monocytes/macrophages in the intestinal mucosa is known to occur in this entity. This infiltration of cells damages the mucosa due to the liberation of proteases, oxidation radicals and cytokines, among others.