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Oxaliplatin, a platinum-based chemotherapeutic agent, is responsible for induced peripheral sensory neuropathy. Only a few cases of ophthalmologic toxicity have been reported. We report here two cases of sudden transient vision loss after oxaliplatin administration, in one case intraperitoneally. These symptoms likely reflect optic neuritis that could be included in the spectrum of oxaliplatin-induced neuropathy., Competing Interests: The authors have no conflicts of interest to declare., (Copyright © 2021 by S. Karger AG, Basel.)

We report the case of a 57-year-old woman who presented with local invasion of the anal canal by mucinous adenocarcinoma, the malignant transformation of a long-term preexisting retrorectal tailgut cyst. This progression is infrequent and justifies preemptive surgical treatment of retrorectal cysts., Competing Interests: All the authors declare that there is no conflict of interest that could be perceived as prejudicing the impartiality of the research reported., (Copyright © 2021 by S. Karger AG, Basel.)

We report the case of a 32-year-old man with a caecal adenocarcinoma with major lymph node extension and peritoneal carcinomatosis, presenting a BRAF-K601E mutation. A triplet (5FU plus oxaliplatin plus irinotecan) combination with bevacizumab achieved tumor control but the disease progressed immediately after cessation and the patient died 8 months after the diagnosis. A short review of BRAF non-V600E mutations shows that outcome and clinical features depend on the mutation.