Background: Mesenteric cysts are intra-abdominal masses of congenital origin, which most frequently occur in children, with an incidence of approximately 1 case per 20,000 pediatric admissions. Its progression can be asymptomatic, and its diagnosis can be incidental. However, it usually occurs with symptoms such as nausea, vomiting, constipation, sensation of a mass, and/or diarrhea. The diagnostic imaging method of choice is abdominal ultrasound. Case presentation: Below, we present the case of a previously healthy 1-year-old male patient with nonspecific symptoms, who was referred to a tertiary hospital. The presence of a mesenteric cyst was detected at the end of the diagnostic approach. Conclusion: It is important to know these pathologies even though they are infrequent, because although they are benign masses by definition, they can lead to complications such as intestinal torsion, intestinal obstruction, and even peritonitis.

Presentación de casos clínicos RESUMENLa pancreatitis consiste en la inflamación aguda del páncreas, que se caracteriza, clínicamente, por dolor abdominal. Para realizar el diagnóstico, es necesario que se presente la elevación de marcadores bioquímicos, como amilasa o lipasa pancreáticas. Esta afección es la enfermedad pancreática más frecuente tanto en niños como en adultos. Su presentación en la población pediátrica está en aumento y tiene varias etiologías, como infecciones, trauma, intoxicación y enfermedades metabólicas. Entre los mecanismos de trauma, se han descrito maltrato infantil, caídas, trauma con el manubrio de la bicicleta y accidentes de tránsito. En este artículo, se presenta un caso de pancreatitis secundaria a un trauma abdominal con el manubrio de una bicicleta en una paciente de 7 años. Palabras clave: niño, pancreatitis aguda, trauma, pancreatitis, traumatismos abdominales. ABSTRACTPancreatitis consists in acute inflammation of the pancreas that is clinically characterized by abdominal pain. To make the diagnosis it is necessary the elevation of biochemical markers like pancreatic amylase or lipase. It is the most frequent pancreatic disease in both children and adults. Its presentation in the pediatric population is increasing and has several etiologies such as: infections, trauma, intoxication and metabolic diseases. Trauma mechanisms have been described: child maltreatment, falls, trauma with the bicycle handle and traffic accidents. In this article, we present a case of pancreatitis secondary to an abdominal trauma with the handle of a bicycle in a patient of 7 years.

Severe skin reactions include Stevens-Johnson Syndrome, toxic epidermal necrolysis and Drug reaction with Eosinophilia and Systemic Symptoms (DRESS) syndrome, which are uncommon in the pediatric population (incidence 1/1000- 10 000 children), but they have bad prognosis. Drug-sensitive Syndrome with eosinophilia and systemic symptoms consists in rash, hematological abnormalities, lymphadenopathy and organ involvement. We report the case of a 12-year-old male patient who developed this pathology after initiating anticonvulsant therapy with carbamazepine. We consider that it is important to be aware of this disease and to include it among the differential diagnoses in patients with similar conditions because this syndrome is life-threatening.