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Health Conditions Starting With L — Research & Medical Insights

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

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Leukemia
Oncology

Cancer of blood-forming cells in the bone marrow, affecting white blood cells.

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Liver Disease
Hepatology

A broad term for conditions damaging liver structure or function.

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Lupus
Rheumatology

Systemic lupus erythematosus — an autoimmune disease attacking multiple organ systems.

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Lyme Disease
Infectious Disease

A tick-borne bacterial infection causing rash, fatigue, and joint pain.

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Lung Cancer
Oncology

The leading cause of cancer death globally, strongly linked to smoking.

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Labyrinthitis
Otolaryngology

Inner ear inflammation causing vertigo, hearing loss, and nausea.

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Lactose Intolerance
Gastroenterology

Difficulty digesting lactose from deficient lactase enzyme, causing bloating and diarrhea.

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Laryngeal Cancer
Oncology

Cancer of the voice box, strongly linked to smoking and alcohol use.

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Laryngitis
Otolaryngology

Inflammation of the voice box causing hoarseness or loss of voice.

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Lazy Eye
Ophthalmology

Amblyopia — reduced vision in one eye from abnormal development in early childhood.

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Lead Poisoning
Internal Medicine

Toxic effects from environmental lead exposure, most dangerous to children.

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Legg-Calvé-Perthes Disease
Orthopedics

A childhood hip disorder where blood supply to the femoral head is disrupted.

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Legionnaires' Disease
Infectious Disease

A severe form of pneumonia caused by Legionella bacteria in contaminated water.

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Leishmaniasis
Infectious Disease

A parasitic disease transmitted by sandflies, ranging from skin lesions to fatal organ disease.

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Leprosy
Infectious Disease

Hansen disease — a chronic bacterial infection affecting skin, nerves, and mucous membranes.

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Leptospirosis
Infectious Disease

A bacterial disease spread through contact with infected animal urine.

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Leriche Syndrome
Vascular Medicine

Blockage of the aorta at its lower end, causing hip pain and sexual dysfunction.

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Leukoplakia
Dentistry

White patches in the mouth that may be precancerous.

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Lichen Planus
Dermatology

An inflammatory condition causing purplish itchy bumps on skin or mucous membranes.

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Lichen Sclerosus
Dermatology

A chronic skin condition causing thin, white patches, often in the genital area.

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Listeriosis
Infectious Disease

A foodborne bacterial infection especially dangerous in pregnancy and immunocompromised patients.

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Liver Cirrhosis
Hepatology

Advanced scarring of the liver from chronic damage, impairing function.

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Liver Failure
Hepatology

Loss of the liver’s ability to function, requiring urgent care or transplant.

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Long QT Syndrome
Cardiology

A heart rhythm disorder that can cause fainting, seizures, or sudden death.

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Low Back Pain
Orthopedics

One of the most common pain complaints, often from muscle strain or disc problems.

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Low Blood Pressure
Cardiology

Hypotension — blood pressure below the normal range, sometimes causing dizziness.

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Low Testosterone
Endocrinology

Reduced testosterone levels causing fatigue, low libido, and muscle loss.

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Lumbar Disc Herniation
Orthopedics

A disc in the lower spine bulges out, often causing sciatica.

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Lumbar Spinal Stenosis
Orthopedics

Narrowing of the lower spinal canal causing back and leg pain with walking.

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Lung Abscess
Pulmonology

A pus-filled cavity in the lung from severe infection.

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Lymphedema
Vascular Medicine

Swelling from impaired lymphatic drainage, often after cancer treatment.

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Lymphoma
Oncology

A group of blood cancers originating in the lymphatic system.

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Lynch Syndrome
Genetics

An inherited disorder that increases risk of colorectal and other cancers.

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Laryngopharyngeal Reflux
Otolaryngology

Stomach acid reaching the throat and voice box, causing hoarseness and cough.

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Latex Allergy
Immunology

An allergic reaction to proteins in natural rubber latex.

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Liver Abscess
Hepatology

A pus-filled cavity in the liver from bacterial or parasitic infection.

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Lichen Simplex Chronicus
Dermatology

Thick, leathery skin from chronic scratching or rubbing.

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Labral Tear
Orthopedics

A tear in the cartilage rim of the shoulder or hip joint.

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Laxative Dependence
Gastroenterology

Reliance on laxatives for bowel movements, with risk of worsening constipation.

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Lymphedema-Distichiasis Syndrome
Genetics

A rare inherited condition combining leg swelling with extra eyelashes.

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Lentigo Maligna
Oncology

An early form of melanoma appearing on sun-exposed skin of older adults.

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Lumbar Radiculopathy
Neurology

Nerve root irritation in the lower spine causing leg pain and tingling.

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