Background In terms of gynaecological laparoscopic surgery, major complications affecting great vessels, and especially the retroperitoneal ones, are unusual. Case presentation We introduce a case of a retroperitoneal haematoma associated with psoas muscle pseudoaneurysm, as a side effect of Veress needle insertion, during laparoscopic surgery. Such complication was managed conservatively at first, requiring finally arterial embolisation. Conclusion Even though potential complications associated with laparoscopic surgery are infrequent, they must not be underestimated, and in some cases might need a multidisciplinary management.