Of 15 Smarcb11148del/1148del mice and 15 Smarcb1+/+ mice observed postnatally over a period of 50 days, 9 Smarcb11148del/1148del mice and 0 Smarcb1+/+ mice showed externally visible hydrocephalus (average observational time point: 32 days [15; 47 days]) (Online Resource 3c). The gene discussed is SMARCB1; the disease is Hydrocephalus.