An extremely rare genetic multisystemic disorder with characteristics of chronic recurrent multifocal osteomyelitis, congenital dyserythropoietic anemia, which may be accompanied by neutrophilic dermatosis. The disease can be associated with fever, joint pain, delayed bone age, growth failure, short adult stature, and development of flexion contractures. Other reported manifestations include failure to thrive, hepatomegaly, neutropenia, and transient cholestatic jaundice. The clinical course is chronic. Caused by a mutation in LPIN2 (18p11.31), which encodes phosphatidate phosphatase LPIN2 (Lipin-2), important in lipid metabolism. Follows an autosomal recessive pattern of inheritance.