May Be Caused by

 Common

Cervical rib

Congenital rib hypoplasia

Hypotonia

Idiopathic

Intrauterine growth retardation

Myotonic dystrophy

Myotubular myopathy

Neurofibromatosis type 1

Regenerated rib after resection

Severe osteoporosis

Werdnig-Hoffmann disease

 Uncommon

3-M syndrome

Achondrogenesis type 1

Aminopterin fetopathy

Angiomatosis

Antley-Bixler syndrome

Campomelic dysplasia

Cockayne syndrome

Contractural arachnodactyly

Diaphanospondylodysostosis

Gorlin syndrome

Hallermann-Streiff syndrome

Hyperparathyroidism

Larsen syndrome

Melnick-Needles osteodysplasty

Metaphyseal chondrodysplasia Jansen type

Morquio syndrome

Osteogenesis imperfecta type 1

Osteogenesis imperfecta type 3

Osteogenesis imperfecta type 4

Otopalatodigital syndrome type 2

Paraplegia

Poliomyelitis

Progeria

Rheumatoid arthritis

Scleroderma

Spondylocostal dysostosis

Spondylothoracic dysplasia

Trisomy 13

Trisomy 18

Trisomy 21

Trisomy 8

Turner syndrome