A rare multiple congenital anomalies/dysmorphic syndrome due to CHD4 gene mutations. It is characterized by developmental delay, speech delay and variable degree of intellectual disability (mostly mid-to-moderate but some patients may also have normal intelligence). Even though clinical manifestations are significantly variable among patients, most patients manifest dysmorphic facial features (could sometimes include macrocephaly), congenital heart defects, hypotonia and opthalmologic abnormalities. Other clinical features may include brain structure anomalies, skeletal anomalies, hearing impairment and hypogonadism (only in males). The disease is Sifrim-Hitz-Weiss syndrome (Monarch Disease Ontology id MONDO_0014946). Also known as: CHD4-related neurodevelopmental disorder, SIHIWES, Sifrim-Hitz-Weiss syndrome; SIHIWES.