To the Editor, Tyberghein and colleagues reported a case of polyneuropathy with conduction blocks in a patient with colorectal cancer receiving FOLFOX (oxaliplatin, 5-fluorouracil, folinic acid) chemotherapy [1]. The authors diagnosed the patient with axonal Guillain-Barré syndrome (GBS). They proposed three possible physiopathological interpretations, among which GBS due to Campylobacter jejuni infection is the more likely. We agree that paraneoplastic polyneuropathy should be considered a differential diagnosis in this case. However, the original report did not describe the neurological examination in detail, e.g., as to whether there was a weakened tendon reflex or not. No pathological results were available to support a definite diagnosis of GBS as well. The authors seem to equate GBS with polyneuropathy.