A lethal skeletal dysplasia characterized by a cloverleaf skull anomaly, facial dysmorphism, limb shortness, splenic hypo/aplasia and radiological anomalies including thin tubular bones with flared metaphyses and deficient calvarial mineralization. The disease is MONDO_0011215 (osteocraniostenosis). Also known as: Osteocraniosplenic syndrome, gracile bone dysplasia.