1. Neurologic system : Dementia/Alzheimer ; Head injury ; Seizures ; Spinal cord injury ; Meningitis ; Parkinson's disease ; Multiple sclerosis ; Guillain-Barré syndrome -- 2. Respiratory system : Pneumonia ; Tuberculosis ; Pneumothorax ; Acute respiratory distress syndrome (ARDS) ; Asthma introduction ; Chronic obstructive pulmonary disease (COPD) ; Bronchitis, the blue bloater ; Emphysema, the pink puffer -- 3. Cardiovascular system : Myocardial infarction (MI) ; Hypertension ; Angina pectoris ; Atherosclerosis ; Congestive heart failure ; Rheumatic fever ; Valvular disorders ; Mitral valve disorders ; Aortic valve disorders -- 4. Gastrointestinal system : Appendicitis ; Diverticular disease ; Cholecystitis ; Peptic ulcers ; Gastroesophageal reflux disease (GERD) ; Overview: bowel diseases ; Ulcerative colitis ; Crohn's disease ; Overview: liver diseases ; Cirrhosis ; Hepatitis ; Liver failure -- 5. Endocrine system : Diabetes mellitus ; Thyroid function ; Hypothyroidism ; Hyperthyroidism ; Adrenal function ; Addison's disease ; Cushing's syndrome ; Pancreas function ; Pancreatitis -- 6. Genitourinary system : Nephrotic syndrome ; Renal dialysis ; Renal calculi ; Urinary tract infection ; Interstitial cystitis ; Glomerulonephritis ; Renal failure --

7. Musculoskeletal system : Osteomyelitis ; Osteoporosis ; Osteoarthritis ; Rheumatoid arthritis --8. Integumentary system : Cellulitis ; Psoriasis ; Scleroderma ; Burns -- 9. Sensory system : Cataracts ; Glaucoma ; Macular degeneration ; Ears ; Otitis externa ; Ménière disease -- 10. Hematologic system : Aplastic anemia ; Sickle cell anemia ; Folate deficiency ; Iron deficiency anemia ; Leukemia ; Hodgkin/non-hodgkin lymphoma ; Multiple myeloma -- 11. Cancer : Colon cancer ; Pancreatic cancer ; Prostate cancer ; Breast cancer ; Ovarian cancer ; Uterine cancer -- 12. Autoimmune system : Human immunodeficiency virus ; Acquired immune deficiency syndrome (AIDS) ; Systemic lupus erythematosus -- 13. Reproductive system : Overview: female reproductive system ; Overview: male reproductive system ; Women: menstrual irregularities ; Menopause ; Sexually transmitted diseases ; Polycystic ovarian syndrome ; Deep vein thrombosis ; Pregnancy-induced hypertension ; Disseminated intravascular coagulation ; Premenstrual syndrome and premenstrual dysphoric disorder ; Male: benign prostatic hyperplasia ; Erectile dysfunction ; Inflammatory disorders: urethritis ; Epididymitis ; Orchitis ; Prostatitis.