Monarch Disease Ontology entry MONDO_0011715 (Seckel syndrome 2) is any Seckel syndrome in which the cause of the disease is a mutation in the RBBP8 gene. Also known as: RBBP8 Seckel syndrome, SCKL2, Seckel syndrome caused by mutation in RBBP8, Seckel syndrome type 2, Seckel-type dwarfism 2, microcephalic primordial dwarfism 2.