[Wunderlich syndrome caused by the rupture of a simple cyst in a patient treated with acetyl salicylic acid]. / Síndrome de Wunderlich por rotura de quiste simple en paciente tratada con ácido acetil salicílico.

Report case of a Wunderlich syndrome due to spontaneous rupture of a simple renal cyst. The patient is a 77-year old, hypertensive female who was on routine treatment with Aspirin. The rarity of retroperitoneal haemorrhage with this origin is documented; also the influence of aspirin as predisposing factor for this condition is ruled out. Brief evaluation of the various diagnostic means available. An accurate evaluation that may allow to adopt a conservative aptitude is recommended.