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Health Conditions Starting With C — Research & Medical Insights

96 conditions. Research summaries and monthly AI-curated newsletters available for each.

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Carpal Tunnel Syndrome
Neurology

Compression of the median nerve at the wrist causing numbness and hand pain.

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Cataracts
Ophthalmology

Clouding of the eye lens causing blurred vision, correctable with surgery.

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Celiac Disease
Gastroenterology

An autoimmune reaction to gluten that damages the small intestine lining.

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Cervical Cancer
Oncology

Cancer of the cervix, largely preventable through HPV vaccination and screening.

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Chronic Fatigue Syndrome
Internal Medicine

Severe, persistent fatigue not improved by rest, often with neurological symptoms.

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Chronic Kidney Disease
Nephrology

Gradual loss of kidney function over months or years.

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COPD
Pulmonology

Chronic obstructive pulmonary disease — progressive lung obstruction, mainly from smoking.

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Cirrhosis
Hepatology

Late-stage liver scarring (fibrosis) from long-term liver damage.

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Colon Cancer
Oncology

Cancer of the large intestine, often beginning as polyps detectable by colonoscopy.

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Coronary Artery Disease
Cardiology

Blockage or narrowing of coronary arteries reducing blood flow to the heart.

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Crohn's Disease
Gastroenterology

Chronic inflammatory bowel disease that can affect any part of the GI tract.

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Cystic Fibrosis
Pulmonology

A genetic disorder causing thick mucus buildup in lungs, digestive tract, and organs.

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Calcific Tendonitis
Orthopedics

Calcium deposits inside a tendon causing pain and limited range of motion.

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Campylobacter Infection
Infectious Disease

A common bacterial cause of foodborne diarrheal illness worldwide.

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Candidiasis
Infectious Disease

Infection caused by Candida fungi, affecting skin, mouth, or vaginal areas.

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Canker Sores
Dentistry

Small, painful ulcers inside the mouth that typically heal within two weeks.

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Cardiac Arrest
Cardiology

Sudden cessation of effective heart function, requiring immediate resuscitation.

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Cardiomyopathy
Cardiology

Disease of the heart muscle that impairs its ability to pump blood effectively.

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Cauda Equina Syndrome
Neurosurgery

Compression of lower spinal nerves, a surgical emergency causing leg weakness and incontinence.

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Cellulitis
Infectious Disease

A bacterial skin infection causing redness, swelling, warmth, and pain.

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Cerebral Palsy
Neurology

A group of disorders affecting movement and posture from early brain development injury.

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Cervical Dysplasia
Gynecology

Precancerous changes in cervical cells detected on Pap smears, often from HPV.

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Cervical Spondylosis
Orthopedics

Age-related wear and tear of discs and joints in the cervical spine causing neck pain.

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Cervicitis
Gynecology

Inflammation of the cervix, often from sexually transmitted infection.

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Chagas Disease
Infectious Disease

A parasitic disease transmitted by triatomine bugs, endemic in Latin America.

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Charcot-Marie-Tooth Disease
Neurology

A group of inherited disorders damaging peripheral nerves, causing weakness and sensory loss.

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Chickenpox
Infectious Disease

A highly contagious viral infection caused by varicella-zoster with itchy blistering rash.

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Chikungunya
Infectious Disease

A mosquito-borne viral illness causing fever and severe joint pain.

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Chlamydia
Infectious Disease

A common sexually transmitted bacterial infection that is often asymptomatic.

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Cholangitis
Hepatology

Infection of the bile duct system, typically from stones obstructing bile flow.

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Cholecystitis
Gastroenterology

Inflammation of the gallbladder, most commonly from gallstones.

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Cholera
Infectious Disease

An acute diarrheal illness from Vibrio cholerae bacteria, causing rapid dehydration.

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Cholesteatoma
Otolaryngology

A destructive skin growth in the middle ear that can damage hearing bones.

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Chondrosarcoma
Oncology

A rare cancer arising from cartilage cells, most common in adults.

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Chronic Lymphocytic Leukemia
Oncology

A slow-growing blood cancer affecting mature lymphocytes, common in older adults.

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Chronic Myeloid Leukemia
Oncology

A cancer of blood-forming cells with a characteristic Philadelphia chromosome.

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Chronic Pain
Pain Medicine

Persistent pain lasting more than three months, affecting quality of life.

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Chronic Sinusitis
Otolaryngology

Long-term sinus inflammation causing nasal congestion and facial pressure.

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Chronic Traumatic Encephalopathy
Neurology

A progressive brain disease linked to repeated head injuries in contact sports.

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Cleft Lip and Palate
Plastic Surgery

A congenital opening in the upper lip or roof of the mouth, typically corrected surgically.

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Clostridium Difficile
Infectious Disease

A bacterial infection of the colon causing severe diarrhea, often after antibiotic use.

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Cluster Headache
Neurology

Severe one-sided headaches occurring in cyclical clusters with autonomic symptoms.

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Coarctation of the Aorta
Cardiology

A congenital narrowing of the aorta causing elevated blood pressure.

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Cold Sores
Infectious Disease

Fluid-filled blisters around the lips caused by herpes simplex virus type 1.

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Colic
Pediatrics

Prolonged unexplained crying in otherwise healthy infants, usually resolving by four months.

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Colitis
Gastroenterology

Inflammation of the colon from infection, inflammatory bowel disease, or ischemia.

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Color Blindness
Ophthalmology

A usually inherited inability to distinguish certain colors, most often red and green.

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Common Cold
Infectious Disease

A mild viral infection of the upper respiratory tract, usually self-limiting.

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Complex Regional Pain Syndrome
Neurology

Chronic limb pain disproportionate to the original injury, with swelling and temperature changes.

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Concussion
Neurology

A mild traumatic brain injury causing temporary cognitive and physical symptoms.

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Congenital Heart Disease
Cardiology

Structural heart defects present at birth, ranging from mild to life-threatening.

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Conjunctivitis
Ophthalmology

Pink eye — inflammation of the conjunctiva from infection or allergy.

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Constipation
Gastroenterology

Infrequent or difficult bowel movements, often from low fiber, dehydration, or inactivity.

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Contact Dermatitis
Dermatology

Skin inflammation from direct contact with an irritant or allergen.

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Corneal Abrasion
Ophthalmology

A scratch on the clear front surface of the eye causing pain and tearing.

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Corneal Ulcer
Ophthalmology

An open sore on the cornea from infection or injury, threatening vision.

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Costochondritis
Rheumatology

Inflammation of the cartilage connecting ribs to the sternum, causing chest wall pain.

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COVID-19
Infectious Disease

Respiratory illness caused by SARS-CoV-2 with a wide range of severity.

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Cradle Cap
Dermatology

Scaly, greasy patches on an infant’s scalp, usually resolving on its own.

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Creutzfeldt-Jakob Disease
Neurology

A rare, fatal prion disease causing rapidly progressive dementia.

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Cryptococcosis
Infectious Disease

A fungal infection affecting lungs and brain, most severe in immunocompromised patients.

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Cryptorchidism
Urology

An undescended testicle, a common birth defect in male infants.

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Cushing's Syndrome
Endocrinology

A disorder caused by prolonged exposure to high cortisol levels.

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Cyclothymia
Psychiatry

A mood disorder with chronic fluctuations between mild depression and hypomania.

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Cystitis
Urology

Inflammation of the bladder, usually from bacterial infection.

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Cytomegalovirus
Infectious Disease

A common herpesvirus that can cause serious disease in newborns and immunocompromised patients.

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Carotid Artery Disease
Vascular Medicine

Narrowing of the neck arteries supplying the brain, increasing stroke risk.

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Cardiogenic Shock
Cardiology

Severe impairment of the heart to pump blood, often after major heart attack.

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Cataplexy
Sleep Medicine

Sudden muscle weakness triggered by emotion, often associated with narcolepsy.

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Central Sleep Apnea
Sleep Medicine

Pauses in breathing during sleep due to impaired brain respiratory drive.

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Chalazion
Ophthalmology

A painless lump in the eyelid from a blocked oil gland.

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Cholestasis
Hepatology

Reduced or blocked bile flow from the liver, leading to jaundice and itching.

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Chondromalacia Patella
Orthopedics

Softening of cartilage under the kneecap causing anterior knee pain.

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Chorea
Neurology

Involuntary, irregular, dance-like movements from basal ganglia dysfunction.

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Chronic Bronchitis
Pulmonology

Long-term airway inflammation with productive cough for at least three months yearly.

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Chronic Granulomatous Disease
Immunology

A rare inherited immune disorder with recurrent bacterial and fungal infections.

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Chronic Venous Insufficiency
Vascular Medicine

Impaired return of blood from leg veins, causing swelling and skin changes.

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Colorectal Polyps
Gastroenterology

Growths on the colon lining that can be precursors to colorectal cancer.

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Common Variable Immune Deficiency
Immunology

A primary immunodeficiency with low antibody levels and recurrent infections.

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Congenital Hypothyroidism
Pediatrics

An infant born with insufficient thyroid hormone, screened at birth to prevent developmental delays.

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Croup
Pediatrics

A viral upper airway infection in young children causing a barking cough.

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Cutaneous T-cell Lymphoma
Oncology

A rare lymphoma that primarily affects the skin, including mycosis fungoides.

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Cervical Radiculopathy
Orthopedics

Nerve root irritation in the neck, causing arm pain, tingling, or weakness.

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Chronic Obstructive Sleep Apnea
Sleep Medicine

Repeated upper airway blockages during sleep, linked to hypertension and fatigue.

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Cat Scratch Disease
Infectious Disease

A bacterial infection from Bartonella henselae transmitted via cat scratches.

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Carcinoid Syndrome
Oncology

Flushing and diarrhea caused by hormones released from neuroendocrine tumors.

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Central Nervous System Lymphoma
Oncology

A rare lymphoma confined to the brain, spinal cord, or eyes.

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Cerebellar Ataxia
Neurology

Impaired coordination and balance from cerebellar dysfunction.

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Cerebral Aneurysm
Neurosurgery

A bulge in a cerebral artery wall that can cause subarachnoid hemorrhage if ruptured.

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Cervical Cancer Screening Abnormality
Gynecology

Abnormal cervical cells detected on Pap smear requiring follow-up evaluation.

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Chronic Urticaria
Immunology

Hives lasting more than six weeks, often idiopathic or autoimmune.

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Clubfoot
Orthopedics

A congenital foot deformity in which the foot is twisted inward and downward.

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Colposcopy Abnormalities
Gynecology

Abnormal findings during magnified cervical examination, often following an abnormal Pap.

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Compartment Syndrome
Orthopedics

Dangerous pressure buildup within a muscle compartment, threatening tissue viability.

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Coronary Artery Spasm
Cardiology

Temporary narrowing of a coronary artery causing chest pain, often at rest.

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Chronic Hepatitis
Hepatology

Persistent liver inflammation lasting more than six months, often from viral infection.

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