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Retrorectal or presacral space is occupied during embryological stem cell development and therefore may contain a heterogeneous group of tumors.We report the case of a 22-year-old male with a pilonidal cyst operated due to recurrent pilonidal sinus cyst. Final diagnosis after pelvic computed tomography is large retrorectal cystic tumor and magnetic resonance diagnosis of a presacral cystic compatible wtih germ cell tumor. The tumor was removed surgically through the abdomen and diagnosis of cystic teratoma was established.Retrorectal tumors are rare lesions whose presence must be ruled out in case of recurrent sinus.Antecedentes: durante el desarrollo embriológico, el espacio retrorrectal o presacro está ocupado por células pluripotenciales y, por tanto, puede contener un grupo heterogéneo de tumores. Caso clínico: se comunica el caso de un paciente masculino de 22 años de edad, intervenido de sinus pilonidal recidivado. Con estudios de tomografía computada de pelvis y resonancia magnética nuclear se sospechó la existencia de un tumor quístico presacro compatible con tumor germinal; la lesión se extirpó quirúrgicamente por vía abdominal y se estableció el diagnóstico definitivo de teratoma quístico. Conclusiones: los tumores retrorrectales son lesiones poco habituales que es necesario descartar en caso de sinus recidivantes.

Bouveret syndrome is a rare entity consisting of duodenal obstruction due to a gallstone from the gallbladder.We present two patients with very different ages and comorbidities whose conditions were resolved in two different ways: a 41-year-old female with right upper quadrant pain and vomiting who underwent surgical correction of obstruction and fistula, and an 81-year-old female with a high bowel obstruction, only treating the obstruction without intervention of the fistula.It is important to include high gastrointestinal obstruction in the differential diagnosis. Diagnosis can be made either by radiological or endoscopic techniques and therapeutic options are diverse, ranging from endoscopic removal to surgery (with the resolution of obstruction and fistula in the same surgical procedure). This condition usually affects elderly patients with high comorbidities and high surgical risk; therefore, most authors recommend using the most conservative possible treatment.