Diagnostic Radiology/Musculoskeletal Imaging/Metabolic Basic

Osteoporosis

1.  Disuse 
2.  Related to aging (postmenopausal, senile)
3.  Idiopathic juvenile 
4.  Transient 
5.  Reflex sympathetic dystrophy

Osteomalacia

1.  Dietary
2.  Gastrointestinal malabsorption 
 a.    Liver disease 
 b.    Anticonvulsant therapy 
3.  Tumor induced 
4.  Renal osteodystrophy
5.  Vitamin D dependent rickets
6.  Milk-alkali syndrome

Parathyroid disorder

1.  Primary hyperparathyroidism 
 a.    Subperiosteal resorption
 b.    Brown tumor
2.  Secondary hyperparathyroidism

Pituitary disorder

1.  Gigantism 
2.  Acromegaly

Intoxication, poisoning

1.  Heavy metal (lead) 
2.  Fluorine 
3.  Hypervitaminosis A 
4.  Hypervitaminosis D

Complication of drug use

1.  Prostaglandin (periostitis)

Osteonecrosis

1.  Causes 
2.  Bone infarction 
3.  Legg-Calve-Perthes disease   
4.  Freiberg infraction 
5.  Kienböck's disease
6.  Kohler disease 
7.  Spontaneous osteonecrosis of the knee

Hematologic disorder

1.  Sickle cell disease or variant
2.  Thalassemia or variant 
3.  Iron deficiency anemia 
4.  Hemophilia
5.  Idiopathic myelofibrosis 
6.  Extramedullary hematopoiesis 
7.  Fatty marrow reconversion

Miscellaneous

1.  Hemochromatosis 
2.  Alkaptonuria 
3.  Amyloidosis 
4.  Paget's disease 
5.  Calcification/ossification secondary to venous stasis 
6.  Calcification/ossification secondary to paraplegia 
7.  Hypertrophic osteoarthropathy 
 a.    Primary (pachydermoperiostosis) 
 b.    Secondary (pulmonary, etc.) 
8.  Infantile cortical hyperostosis (Caffey disease)

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