Crisis de llanto, irritabilidad y masa en el hemiabdomen derecho no siempre son sinónimos de invaginación intestinal

acute urinary retention in children is seldom described in medical literature. there is no predominance of sex, and their median age is four years. it can be primary (nephrourological diseases) or secondary to different conditions (surgery, immobility, chronic neurological disorders, mental retardation, drugs abuse, anticholinergics, constipation). it can simulate an intussusception, with severe abdominal pain and irritability. the treatment is the evacuation of urine by catheterization. it should be done in stages if the bladder volume is very high, to avoid ex-vacuo hematuria.