Hodhod A, et al. - Authors sought to assess the feasibility and value of renal pyramidal thickness (PT) as a predictor of pyeloplasty in high-grade postnatal hydronephrosis. As PT was a slowly growing part of the parenchyma, it could be a good measurable parameter for predicting pyeloplasty. In hydronephrosis, measurement of PT was reliable. Pyeloplasty could be predicted by PT ≤ 3 mm with 98.1% sensitivity and 89.7% specificity.