The mandibular molars are more prone to aberrations of canals. They include bifurcation and trifurcation of canals, fusion of roots, extreme canal curvatures and c shaped canals which makes it difficult to diagnose and manage. The failure to treat them leads to reinfection and persistence of infection in the tooth. Hence, it is of utmost importance for the clinician to know the morphologic variations. The present case report is aimed to give a clinical insight of such aberrations. The two cases presents with mandibular second molar with “c” shaped root canal system, which was diagnosed with CBCT. Both the cases were treated endodontically and successfully managed.