Ball-Valve Syndrome Secondary to Large Fundic Adenoma.

Gastroduodenal intussusception is a rare presentation in adults. A mass lesion in the stomach typically acts as a lead point that invaginates into the pylorus and duodenum causing intussusception. In a subset of these cases, episodic symptoms of obstruction occur because of intermittent prolapse of the lesion, termed "ball-valve syndrome.

Nonresolving Axillary Lymphadenopathy: An Unexpected Case of Metastatic Jejunal Adenocarcinoma in a Small-Bowel Transplant Recipient Masquerading as Posttransplant Lymphoproliferative Disorder.

Intestinal transplant is an uncommon treatment of intestinal failure that has provided many patients with reduced morbidity and mortality. However, there are associated risks, including an increased risk of cancer, such as posttransplant lymphoproliferative disorder and solid-organ malignancy. Here, we report a unique case of primary jejunal adenocarcinoma presenting initially only with axillary lymphadenopathy in a patient with recurrent posttransplant lymphoproliferative disorder after multiple solid-organ transplants, including small intestine and 2 renal transplants.

Code Stroke Postendoscopy: A Case of Pneumocephalus From a Spinal-Esophageal Fistula.

Esophageal fistula to the respiratory tract and mediastinum is a well-described complication from esophageal malignancies. Spinal-esophageal fistula (SEF) on the other hand is a much rarer complication that has only been reported in few instances. Here, we report a unique case of fatal spinal-esophageal fistula with an associated pneumocephalus in an 83-year-old woman with metastatic esophageal squamous cell carcinoma.

Spray coagulation with snare-tip versus argon plasma coagulation: An ex vivo study evaluating tissue effects.

Argon plasma coagulation (APC) is an effective and safe modality for many gastrointestinal conditions requiring hemostasis and/or ablation. However, it can be quite costly. A potentially more cost-effective alternative is snare-tip spray coagulation (SC).

Distinct Temporal Regulation of RET Isoform Internalization: Roles of Clathrin and AP2.

The RET receptor tyrosine kinase (RTK) contributes to kidney and nervous system development, and is implicated in a number of human cancers. RET is expressed as two protein isoforms, RET9 and RET51, with distinct interactions and signaling properties that contribute to these processes. RET isoforms are internalized from the cell surface into endosomal compartments in response to glial cell line-derived neurotropic factor (GDNF) ligand stimulation but the specific mechanisms of RET trafficking remain to be elucidated.