Endoscopic and ultrasound image of an ileocolic intussusception. An unusual finding in adult patients.

We present the case of a 63-year-old woman in whom the clinical and ultrasound imaging initially suspected the existence of colon neoplasia, which finally turned out to be an ileocolic invagination, with the prognostic change that this entails. The contribution of this article is to bring readers closer to clinical cases that, although infrequent, should be taken into account. In this way, it allows the reader to suspect it in clinical practice in patients who meet the clinical characteristics mentioned.

Rescue with echoendoscopy-guided cholecystogastrostomy in a patient with rectal melanoma metastasis. A diagnostic and therapeutic challenge.

We present the case of a 70-year-old woman with a history of transanal resection of rectal melanoma who presented with obstructive jaundice. She underwent complementary tests and was diagnosed with metastasis of melanoma at ampullary level. We consider this to be an interesting case given its unusual nature, as well as its difficult diagnostic and therapeutic management.

Colonic duplication cyst, a diagnosis to consider in young patients with abdominal pain.

We present the case of a 22-year-old woman with cesarean section 11 days before with abdominal pain in the left flank of one week of evolution associated with self-limited liquid stools. In the analytical control, leukocytes at the expense of neutrophils, as well as CRP 147 gr/L were highlighted. An abdominal CT scan was requested without contrast iv, which showed inflammatory changes in the pericolonic fat adjacent to the descending colon associated with concentric mural thickening with oval lesion. Due to the characteristics of the patient continuing with abdominal pain and the CT findings, abdominal MRI was requested in which concentric mural thickening of a segment of descending colon with longitudinal diameter of approximately 6 cm, associated with infiltration-rarefaction of the pericolonic fat, and cystic image that protrudes on the left lateral wall of the colon of approximately 3.7x5 cm was observed.

Upper gastrointestinal bleeding secondary to toxicity by anthracyclines, cytarabine and methotrexate in a patient with acute lymphoblastic leukemia.

A 60-year-old male patient with no medical history but acute lymphoblastic leukemia was admitted in the hematology ward for chemotherapy treatment (methotrexate, cytarabine, fludarabine and idarubicin). Approximately six days after finishing this chemotherapy, the patient began with symptoms of upper gastrointestinal bleeding (hematemesis and melena). Gastroscopy revealed erosive esophagitis, gastritis and duodenitis, as well as Forrest III ulcers in the duodenal bulb and multiple Forrest IIb ulcers in the second portion of the duodenum. Given the multiplicity of lesions, medical treatment with high doses of folinic acid, intravenous omeprazole, and transfusion of blood products was decided, with favorable evolution of the gastrointestinal bleeding. However, the patient died of respiratory infection.

"Omental Cake" in a Patient With Asbestosis Leading to the Diagnosis of Malignant Peritoneal Mesothelioma.

We report a case of a 68-year-old man with medical history of pleural asbestosis and diagnosed with malignant peritoneal mesothelioma. This neoplasm is rare, has a poor prognosis, and is associated with asbestosis in many cases. It manifests clinically insidiously and in relation to the intra-abdominal locoregional effect. Radiological findings are variable, although the finding of "omental cake" by CT scan is characteristic but not pathognomonic, as seen in our case. A biopsy is required for the diagnosis, which can be guided by radiology or surgery. Treatment options available are cytoreductive surgery with intraperitoneal hyperthermic chemotherapy or systemic chemotherapy. However, new therapeutic options are emerging, which are still under development and research.