Africa 
China 
Japan 
MENA 
- Lower segment caesarean section
- Lower subscapular nerve
- Lower urinary tract symptoms
- Loxapine
- Loxoprofen
- Loxoscelism
- Lozenges
- Lp-LpA2
- Lubiprostone
- Lubrication
- Lucid dreams
- Lucid interval
- Lucifer yellow
- Luciferase
- Luciferin
- Lucigenin
- Lucinactant
- Lugol's iodine
- Lujan-Fryns syndrome
- Luliconazole
- Lumbar arteries
- Lumbar artery
- Lumbar enlargement
- Lumbar lordosis
- Lumbar lymph nodes
- Lumbar nerve
- Lumbar plexus
- Lumbar puncture
- Lumbar region
- Lumbar spinal stenosis
- Lumbar spine
- Lumbar splanchnic nerves
- Lumbar triangle
- Lumbar vein
- Lumbar vertebrae
- Lumbosacral joint
- Lumbosacral plexus
- Lumbosacral trunk
- Lumbricals
- Lumbrokinase
- Lumefantrine
- Lumen
- Lumican
- Luminol
- Lumiracoxib
- Lumpectomy
- Lumpy jaw
- Lunasin
- Lunate
- Lund and Browder chart
- Lung
- Lung abscess
- Lung allocation score
- Lung biopsy
- Lung bud
- Lung cancer
- Lung cancer screening
- Lung cancer susceptibility
- Lung cavity
- Lung compliance
- Lung diseases
- Lung fields
- Lung hemorrhage
- Lung infarction
- Lung infection
- Lung lobectomy
- Lung microbiota
- Lung nodules
- Lung parenchyma
- Lung transplant
- Lung transplantation
- Lung ventilation
- Lung volumes
- Lung-on-a-chip
- Lupeol
- Lupus
- Lupus anticoagulant
- Lupus erythematosus
- Lupus erythematosus panniculitis
- Lupus nephritis
- Lupus pernio
- Lupus vulgaris
- Lurasidone
- Lurbinectedin
- Lusitropy
- Luspatercept
- Lutathera
- Luteal insufficiency
- Luteal phase
- Luteal support
- Lutein
- Luteinization
- Lutembacher's syndrome
- Luteolin
- Luteoma
- Lutidine
- Lutzomyia
- Luxol fast blue stain
- Luxturna
- Ly49
- Ly6
- Lycium barbarum
- Lycium chinense
- Lycopene
- Lycopodium clavatum
- Lycorine
- Lye
- Lying-in
- Lyl1
- Lyme disease
- Lymecycline
- Lymph
- Lymph duct
- Lymph fluid
- Lymph node biopsy
- Lymph node metastasis
- Lymph nodes
- Lymph sacs
- Lymph vessels
- Lymphadenectomy
- Lymphadenitis
- Lymphadenopathy
- Lymphangiectasia
- Lymphangiectasis
- Lymphangiogenesis
- Lymphangiography
- Lymphangioleiomyomatosis
- Lymphangioma circumscriptum
- Lymphangiomas
- Lymphangiomatosis
- Lymphangion
- Lymphangiosarcoma
- Lymphangitis
- Lymphangitis carcinomatosa
- Lymphatic capillary
- Lymphatic disease
- Lymphatic drainage
- Lymphatic endothelium
- Lymphatic filariasis
- Lymphatic system
- Lymphatic tissue
- Lymphatic tissues
- Lymphatic vessels
- Lymphedema
- Lymphedema-distichiasis syndrome
- Lymphedema–distichiasis syndrome
- Lymphoblasts
- Lymphocele
- Lymphocryptovirus
- Lymphocyte