In the case report by Sónia Barros^a, Joana Roseira^a, Paulo Caldeira^a, Ana Margarid Vaz^a, Horácio Guerreiro^a, Oscar Condon^b entitled “Rectal Perforation by a Balloonspacer - A Rare Cause of Rectal Perforation Addressed Endoscopically” [GE Port J Gastroenterol., DOI: 10.1159/000511647] six corrections are necessary.

The first correction is on page 1, 2 and 3. In the published version, the name of the last author reads: “Codon.” The correct version should read: “Condon.”

The second correction is on the page 2, “Introduction,” line 34. The published version reads: “Few and rare complications have been documented in addition to perianal discomfort during placement [7].” The reference is incorrect, and the sentence and reference should be disregarded.

The third correction is on page 2, “Case Presentation,” line 5. The published version reads: “In order to minimize rectal irradiation, an ultrasound-guided balloon spacer (BioProtect®) was implanted using blunt dissection.” The correct version should read: “In order to minimize rectal irradiation, an ultrasound-guided balloon spacer (BioProtect®) was implanted using needle dissection, this technique is no longer used to reduce risk of rectal injury. The hydrodissection is now carried out using a beveled tip dilator implantation technique with reduced risk of perforation of the rectal wall.”

The fourth correction is on page 2, “Discussion/Conclusion,” line 7. The published version reads: “In our case report, an expert radiologist performed the balloon spacer placement manoeuvres without detectable immediate complications.” The correct version should read: “In our case report, an expert radiation oncologist performed the balloon spacer placement manoeuvres without detectable immediate complications.”

The fifth correction is on page 3, “Discussion/Conclusion,” lines 7-8. The published version reads: “Schörghofer et al. [9] stated that the balloons’ rigid structure and size may make them more prone to cause rectal lesions.” The correct version should read: “Schörghofer et al. [9] stated that the most likely cause of rectum perforations was an unprecise placement of the needle in the retroprostatic space behind the Denovillier fascia prior to hydrodissection.”

The sixth correction is on page 4, “Author Contributions,” line 3: The published version reads: “O.C.: radiotherapist involved in the patient management; …” The correct version should read: “O.C.: radiation oncologist involved in the patient management; …”