Presacral tumor as a differential diagnosis of recurrent pilonidal sinus

: Antecedentes: durante el desarrollo embriologico, el espacio retrorrectal o presacro esta ocupado por celulas pluripotenciales y, por tanto, puede contener un grupo heterogeneo de tumores. Caso clinico: se comunica el caso de un paciente masculino de 22 anos de edad, intervenido de sinus pilonidal recidivado. Con estudios de tomografia computada de pelvis y resonancia magnetica nuclear se sospecho la existencia de un tumor quistico presacro compatible con tumor germinal; la lesion se extirpo quirurgicamente por via abdominal y se establecio el diagnostico definitivo de teratoma quistico. Conclusiones: los tumores retrorrectales son lesiones poco habituales que es necesario descartar en caso de sinus recidivantes. CLINICAL CASE: 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. CONCLUSION: Retrorectal tumors are rare lesions whose presence must be ruled out in case of recurrent sinus.