Labyrinthitis
Lack of intrinsic factor
Lacrimal gland tumor
Lactase deficiency
Lactic acidosis
Lactose intolerance
Laennec's cirrhosis
Lambert-Eaton Syndrome
Lamellar ichthyosis
Lancefield group B streptococcus
Landouzy-Dejerine muscular dystrophy
Landry-Guillain-Barre syndrome
Langerhans cell histiocytosis
Language disorder - expressive
Larva migrans visceralis
Laryngeal cancer
Laryngeal nerve damage
Laryngitis
Laryngotracheobronchitis - acute
Late persistent Lyme disease
Late syphilis
Lateral epicondylitis
Lateral rectus palsy
Latrogenic Cushing syndrome
Laxative colitis
Lazy eye
LeFort injuries
Left-sided heart failure
Legg-Calve-Perthes disease
Legionella pneumonia
Legionnaire's disease
Leiomyoma
Leiomyoma - intestine
Leiomyosarcoma
Leishmaniasis
Lens opacity
Leopard syndrome
Leprosy
Leptospirosis
Lesch-Nyhan syndrome
Letterer-Siwe disease
Leukemia
Leukemia - acute childhood (ALL)
Leukemia - acute granulocytic
Leukemia - acute myeloid (AML)
Leukemia - chronic granulocytic (CML)
Leukemia - chronic lymphocytic (CLL)
Leukemia - hairy cell
Leukemia - nonlymphocytic (ANLL)
Leukemic reticuloendotheliosis
Leukemoid reaction
Leukodystrophy - metachromatic
Leukoplakia
Lewy body dementia
Leydig cell tumor
LGV
Lice - body
Lice - head
Lice - pubic
Lichen planus
Lichen simplex chronicus
Limb-girdle muscular dystrophies
Lipid disorders
Lipofuscinoses
Lipoid nephrosis
Listeriosis
Little stroke
Livedo reticularis
Liver abscess
Liver cancer
Liver cirrhosis
Liver disease
Liver disease due to alcohol
Liver hemangioma
Liver metastases
Liver spots
Lobar intracerebral hemorrhage
Lobular capillary hemangioma
Lobular GN
Localized lymphadenopathy
Lockjaw
Loeffler syndrome
Lou Gehrig's disease
Louis-Bar syndrome
Low blood magnesium
Low blood phosphate
Low blood potassium
Low blood pressure
Low blood sugar
Low density lipoprotein receptor mutation
Low-grade chronic hyperbilirubinemia
Lower esophageal ring (Schatzki)
Lower urinary tract obstruction
Loxia
Lucey-Driscol syndrome
Ludwig’s angina
Lues
Lumbar radiculopathy
Lump in the rectum
Lumps in the breasts
Lumpy jaw
Lung blood clot
Lung cancer
Lung cancer - non-small cell
Lung cancer - small cell
Lung collapse - spontaneous
Lung disease
Lung disease - rheumatoid arthritis
Lung metastases
Lung water
Lung/pulmonary congestion
Lupoid hepatitis
Lupus
Lupus anticoagulants
Lupus erythematosus
Lupus glomerular disease
Lupus nephritis
Luteal phase defect
Lyell's syndrome
Lyme borreliosis
Lyme disease
Lyme disease - chronic persistent
Lyme disease - early disseminated
Lyme disease - primary
Lyme disease - secondary or stage 2
Lymph follicular hypertrophy
Lymph gland infection
Lymph node infection
Lymphadenitis and lymphangitis
Lymphadenoid goiter
Lymphadenopathy
lymphangioma
Lymphatic obstruction
Lymphedema
Lymphoblastic lymphoma
Lymphocytic lymphoma
Lymphocytic thyroiditis
Lymphogranuloma inguinale
Lymphogranuloma venereum
Lymphoid hyperplasia
Lymphoid hypertrophy
Lymphoma - brain
Lymphoma - Hodgkin's
Lymphoma - mediastinal
Lymphoma - non-Hodgkin's
Lymphopathia venereum
Lymphoplasmacytic lymphoma