The incidence of PTH is 7.9%‐54% in patients with TBI after DC depending on the inclusion criteria and the definitions of hydrocephalus that were used (Fotakopoulos, Tsianaka, Siasios, Vagkopoulos, & Fountas, 2016; Ki et al., 2015; Kim, Lee, Ahn, Park, & Huh, 2017; Su, Lee, Huang, Su, & Chen, 2011). Here, PTH is linked to Hydrocephalus.