Pneumosinus Dilatans and Hypercalcification of the Falx and Ligamentum Petroclinoideum in Myotonic Dystrophy 1

This case shows that PSD may occur together with MD1. Whether this association is causal or coincidental remains to be elucidated. It also remains speculative whether PSD contributes to the facial dysmorphism frequently present in MD1 patients. If PSD becomes symptomatic surgical intervention should be considered.