“…Nevertheless, no relevant consideration has been reported about diagnostic proof of ongoing PTH ( Table 2 ). Yan et al (2022) reported the ventricular/biparietal (V/Bp) ratio >0.26 as an assessment of the degree of hydrocephalus and to drive surgery. The authors reported the one-staged operation conducive to early recovery, especially with ipsilateral VPS ( Table 2 ) ( Yan et al, 2022 ).…”