Complex sentence: Firstly it is hard to get an overview with nasoendoscopy with a rigid scope in small children, especially when there are abnormalities or obstructions in the nasal cavity, which are frequently found in children with a history of cleft palate.
Split into simpler sentences: Firstly it is hard to get an overview with nasoendoscopy with a rigid scope in small kids. Especially when there are abnormalities or obstructions in the nasal cavity, which are frequently found in children with a history of cleft palate.