“…The intracompartmental septum reportedly occurs in 44% to 91% of patients with de Quervain's disease [3,5,6,9,13,16,18,19] although it is seen in only 20% to 40% of cadavers [3,4,6,[8][9][10][11]13]. Two previous studies have directly compared the prevalences of an intracompartmental septum in cadavers and patients with de Quervain's disease, and both reported a higher prevalence of an intracompartmental septum in patients [6,9]. Furthermore, several studies have suggested those with a separate septum are at higher risk for nonoperative treatment failure [5,9,18,19] and even surgical failure [12,14].…”