Pitt-Hopkins-like syndrome (Monarch Disease Ontology entry MONDO_0016377) is a rare, genetic, syndromic intellectual disability disorder characterized by severe intellectual disability, lack of speech with normal, or mildly delayed, motor development, episodic breathing abnormalities, early-onset seizures and facial dysmorphism which only includes a wide mouth. Abnormal sleep-wake cycles, autistic behavior and stereotypic movements are commonly associated. Also known as: PTHSL.