Diseases

Here are the various diseases which are the causes of symptoms addressed in Diagnosis123, arranged by organ systems. Some of them are cross-referenced (duplicated). Feel free to comment if you have any questions about them.

Abdomen
Abdominal Aortic Aneurysm (AAA)
Abdominal Muscle Strain
Acute Gastroenteritis
Anal Fissure
Appendicitis
Ascites
Bowel Ischemia
Bowel Obstruction
Celiac Disease
Cirrhosis
Colon Cancer
Constipation (as cause of abdominal xxxxxpain)
Crohn’s Disease
Dyspepsia
Fatty Liver
Fecal Impaction
Gallbladder Disease
Gastric Cancer
Gastritis
Gastro-Esophageal Reflux
Hemorrhoids
Hepatitis, Acute
Hepatitis — Differences Among the xxxxxViruses
Inflammatory Bowel Disease
Irritable Bowel Syndrome (IBS)
Ischemic Bowel
Lactose Intolerance
Liver Diseases (Chronic)
Liver Failure – Acute
Malabsorption Syndromes
Mesenteric Venous Thrombosis
Peritonitis
Ovarian Disease (as cause of xxxxxabdominal pain)
Pancreatitis
Polyps (bowel)
Post-Cholecystectomy Syndrome
Pyelonephritis
Staphylococcal Food Poisoning
Stomach Cancer
Stomach Ulcer
Ulcer
Ulcerative Colitis

Cancers
Cancer (in general)
Colon Cancer
Endometrial Cancer (Uterus)
Leukemia
Lung Cancer
Lymphoma
Multiple Myeloma
Myelodysplasia (pre-cancer of blood)
Prostate Cancer
Stomach (Gastric) Cancer

Circulatory — see Hematology below

Ear-Nose-Throat
Adenoid Enlargement
Allergies (“Hay Fever”)
Common Cold
Covid-19
Eustachian Tube Dysfunction
Foreign Body — Nose
Mastoiditis
Nasal Furuncle
Nasal Septum Problems
Oral Infections (deep)
Peritonsillar Abscess
Otitis Externa
Otitis Media (middle ear infection)
Polyps (Nasal)
Rhinitis Medicamentosa
Sinusitis
Strep Throat
Tinnitus
TMJ Disorder
Tularemia
Upper Airway Obstruction
Viral Sore Throat (Pharyngitis)

Endocrine
Adrenal Insufficiency (Addison’s Disease)
Congenital Adrenal Hyperplasia (CAH)
Diabetes
Diabetic Autonomic Neuropathy
Diabetic Ketoacidosis
Hyperthyroidism
Hypothyroidism
Pheochromocytoma
Pituitary Insufficiency
Polycystic Ovarian Syndrome (PCOS)
Thyroid Diseases

Eye
“Pink Eye” — Conjunctivitis
— Allergic Conjunctivitis (airborne)
— Allergic Conjunctivitis (contact)
— Bacterial Conjunctivitis
— Chlamydial Conjunctivitis
— Gonorrheal Conjunctivitis
— Herpes Conjunctivitis
— Viral Conjunctivitis
Corneal Abrasion / Foreign Body
Episcleritis
Foreign Body — Conjunctiva
Glaucoma
Iritis / Uveitis
Keratitis
Optic Neuritis
Pterygium
Scleritis
Subconjunctival Hemorrhage
Uveitis

Gastrointestinal — See Abdomen above

Genitals
Male: See Kidney & Urology
Female: See Gynecology

Gynecology
Adenomyosis
Amenorrhea – Functional
Breast Diseases
Cervicitis
Chronic Pelvic Pain
Ectopic Pregnancy
Endometrial Cancer
Endometritis (uterine infection)
Fibroids (of the Uterus)
Genital Warts
Menopause – Premature
Miscarriage
Mittelschmerz / Dysmenorrhea xxxxx(menstrual pains)
Ovarian Disease (as cause of abdominal pain)
Pelvic Inflammatory Disease (P.I.D.)
Pubic Lice
Tubal Infection (PID)
Uterine Infection (Endometritis)

Hair (see Skin)

Heart
Angina Pectoris
Arrhythmias
Atherosclerosis
Atrial Fibrillation (“A. Fib”)
Chest Wall Pain
Coronary Artery Disease
Endocarditis
Fainting (Syncope)
Heart Attack (Myocardial Infarction)
Heart Failure
Hypertension (High Blood Pressure)
Myocarditis
Pericarditis
Rib Fracture (without trauma)
Shock
Spontaneous Coronary Artery xxxxxDissection (SCAD)
Thoracic Aortic Aneurysm

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Hematology (Blood / Circulatory)
Anemia
Anemia – Acute
Atherosclerosis
Deep Venous Thrombosis
Fainting (Syncope)
Folic Acid Deficiency
Hypertension (High Blood Pressure)
Iron Deficiency
Neutropenia
Sepsis
Shock
Thrombophlebitis
Venous Thrombosis
Vitamin B12 Deficiency
Von Willebrand Disease

Immune System
Acquired Immunodeficiency Syndrome xxxxx(AIDS)
Acute (Primary) HIV
Allergies (“Hay Fever”)
Anaphylaxis
Chronic Fatigue Syndrome
HIV Disease
HIV — Acute
HIV — Asymptomatic (Latent) Phase
Lupus (SLE)
Sarcoidosis
Scleroderma
Systemic Lupus Erythematosus (SLE, xxxLupus)

Infections
Abscesses
Acquired Immunodeficiency Syndrome xxxxx(AIDS)
Acute HIV
Brain Infections
Bronchitis — Acute
Cellulitis
Chlamydia
Common Cold
Covid-19
Diphtheria
Endocarditis
Genital Warts
Gonorrhea
Herpes Simplex (Types 1 and 2)
Herpes Zoster (Shingles)
HIV Disease
HIV — Acute
Influenza (& other viruses)
Lyme Disease
Mononucleosis
Rabies
Rubella
Sepsis
Septic Arthritis
Shingles (Herpes Zoster)
Staphylococcal Food Poisoning
Syphilis
Syphilis — Some Pictures
Tularemia
Tuberculosis (TB)
Viruses
Zoster (Shingles)

Kidney & Urinary
Benign Prostatic Hypertrophy (BPH)
Cystitis (UTI)
Genital Warts
Interstitial Cystitis / Bladder Pain Syndrome
Kidney (Renal) Failure
Kidney Infarction
Kidney Infection
Kidney Stones
Prostate Cancer
Prostatitis — Acute
Prostatitis — Chronic
Pyelonephritis
Testicular Disease
Urethritis
Urinary Tract infection (UTI; Cystitis)

Lungs
Asthma
Bronchitis — Acute
COPD
Covid-19
Foreign Body Aspiration
Hypersensitivity Pneumonitis
Influenza (& other viruses)
Interstitial Lung Disease (ILD)
Lung Cancer
Pertussis (“Whooping Cough”)
Pleurisy / Pleuritis
Pneumonia
Pneumothorax
Pulmonary Embolism
Shortness of Breath – Uncommon xxxxxCauses
Sleep Apnea
Tracheitis (“Croup” in children < 3 y.o.)
Tuberculosis (TB)
Upper Airway Obstruction

Musculoskeletal & Rheumatology
Abdominal Muscle Strain
Avascular Necrosis (Hip)
Behçet’s Syndrome
Bone Disease
Chest Wall Pain
Fibromyalgia
Gout
Herniated Disk
Leg Cramps
Lupus (SLE)
Multiple Myeloma
Neck Fracture
Neck Muscle Spasm
Osteoarthritis
Pseudogout
Psoriatic Arthritis
Raynaud’s Phenomenon
Reactive Arthritis
Rheumatic Fever
Rheumatoid Arthritis
Rheumatologic Conditions (rare)
Rib Fracture (without trauma)
Scleroderma
Scoliosis
Septic Arthritis
Sjögren’s Syndrome
SLE (Lupus)
Spinal Cord Diseases
Spinal Stenosis
Strains / Sprains
Systemic Lupus Erythematosus (SLE, xxxLupus)

Neurology
AIDS-Related Brain Diseases
AIDS-Related Dementia
Bell’s Palsy (Facial Palsy)
Brain Infections
Cluster Headache
Concussion / Post-Concussive xxxSyndrome
Delirium
Dementia
Diabetic Autonomic Neuropathy
Epidural Hematoma
Epilepsy
Fainting (Syncope)
Head Trauma (Minor)
Idiopathic Intracranial Hypertension xxx(I.I.H.)
Increased Intracranial Pressure
Medication Overuse Headache
Meningitis
Migraine Headache
Mild Cognitive Impairment
Multiple Sclerosis
Parkinson’s Disease
Seizures
Stroke and TIA
Tension Headache
Transient Global Amnesia
Vitamin B12 Deficiency

Oncology — see Cancer

Psychiatry
Anxiety
Bulimia
Bipolar Disorder
Conversion Reaction
Depression
Dementia
Dissociative State
Psychosis
Schizophrenia
Somatization Disorder

Skin & Hair
Alopecia Areata
Discoid Lupus
Female Pattern Hair Loss
Folliculitis
Male Pattern Hair Loss
Psoriasis
Seborrheic Dermatitis
Telogen Effluvium
Tinea Capitis (scalp ringworm)
Traction Alopecia
Trichotillomania
Some Pictures of Hair Loss

Various
Carbon Monoxide Poisoning
Chronic Fatigue Syndrome
Folic Acid Deficiency
Sarcoidosis
Sleep Apnea
Vitamin B12 Deficiency
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