Background Spine surgery is associated with considerable postoperative pain and can be challenging to treat. A loco-regional technique suitable for spine surgery should cover the dorsal root of the spinal nerves at the levels where surgery is performed. The erector spinae block is a loco-regional technique with promising results and was recently described at the thoracic level. There are no randomized trials of this technique on a lumbar level. This study tests the hypothesis that the 24-h postoperative morphine consumption is significantly lower in patients undergoing posterior lumbar inter-body fusion surgery with a lumbar erector spinae (LUMBES) block when compared with a sham block. Methods This prospective randomized double-blind multicenter study will randomly allocate 80 adult patients undergoing elective posterior lumbar inter-body fusion surgery during general anesthesia to one of two groups as follows: (1) bilateral erector spinae block (20 mL 0.25% levobupivacaine) or (2) bilateral sham block (20 mL NaCl 0.9%). Our primary endpoint is 24-h postoperative morphine consumption. Secondary endpoints include 72-h morphine consumption, intraoperative sufentanil dosage, postoperative pain scores at regular time intervals both at rest and during movement, time to first postoperative mobilization, and the Quality of Recovery 40 survey score. Discussion The LUMBES trial is a pragmatic clinical study that will provide evidence of whether a bilateral lumbar erector spinae block is effective in reducing 24-h postoperative morphine consumption in patients undergoing lumbar inter-body fusion surgery. If this hypothesis is confirmed, this finding could contribute to more widespread implementation of this technique. Trial registration Local ethics committee B300201837508, ClinicalTrials.gov identifier: NCT03825198 . Registered on 31 Jan 2019. Electronic supplementary material The online version of this article (10.1186/s13063-019-3541-y) contains supplementary material, which is available to authorized users.

CSF-containing cysts at the level of the choroidal fissure may be of the arachnoid or the neuroepithelial type, but pathological confirmation of a CSF-containing cyst at this specific location has never been published. Very infrequently they are symptomatic, and surgical treatment is hardly ever necessary.

We present a case of swelling of the eyelid and supraorbital anesthesia caused by an intraorbital tumor. The differential diagnosis based on imaging consisted of aneurysmal bone cyst, schwannoma, neurofibroma, dermoid cyst, and cavernous hemangioma. The surgical and pathological diagnosis was an ancient schwannoma of the orbit, a rare entity.

Migration of a ventriculoperitoneal shunt catheter is a rare but well-recognised complication in hydrocephalus treatment. Perforation into different organs or through natural or artificial orifices has been described. In this case, the shunt catheter has extruded through a Mitrofanoff appendicovesicostomy.

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