II. Causes: Endocrine Causes
- Hyperparathyroidism
- Grave's Disease or Hyperthyroidism
- Cushing's Disease
- Hyperprolactinemia (Prolactinoma)
-
Hypogonadism
- Women: Menopause
- Men: "Male Menopause"
- Declining Testosterone and Estradiol
- Orchiectomy in Prostate Cancer
III. Causes: Nutrition
-
Vitamin D Deficiency (very common in elderly)
- Community-dwelling elderly: 36% men, 47% women
- Long-term Care Residents: 80-100% Prevalence
- Alcoholism or Alcohol use more than 2 drinks per day
- Tobacco Abuse
- Gastric Bypass Surgery
- Low Body Weight or Body Mass Index
- Malabsorption syndromes (esp. Celiac Sprue)
- Malnutrition
- Vitamin A Excess
- Anorexia Nervosa (and Female Athlete Triad)
- Bulimia Nervosa
- Calcium deficiency (e.g. Hypercalciuria)
IV. Causes: Miscellaneous Chronic Disease
V. Causes: Malignancy
- Multiple Myeloma
- Leukemia
- Lymphoma
- Ectopic ACTH Syndrome
VI. Causes: Genetic Syndromes
- Osteogenesis imperfecta
- Marfan Syndrome
- Ehlers-Danlos Syndrome
- Homocystinuria
- Glycogen Storage Diseases
- Hypophosphatasia