• Labyrinthitis
  • Lactase deficiency
  • Lactose intolerance
  • Lambert-Eaton myasthenic syndrome
  • Langerhans cell histiocytosis
  • Laparoschisis
  • Large bowel obstruction
  • Large cell carcinoma
  • Laryngeal cancer
  • Laryngeal dysphonia
  • Laryngitis
  • Laryngomalacia
  • Laryngotracheobronchitis
  • Lateral epicondylitis
  • Lazy eye
  • LBO [large bowel obstruction]
  • LBP [low back pain]
  • LCH [Langerhans cell histiocytosis]
  • LCIS [lobular carcinoma in situ]
  • LCPD [Legg-Calve-Perthes disease]
  • Lead toxicity
  • Leg cramps
  • Leg fracture
  • Leg torsion in children
  • Legg-Calve-Perthes disease
  • Legionella infection
  • Legionella pneumophila
  • Leiomyomata
  • Leiomyosarcoma
  • Leishmaniasis
  • LEMS [Lambert-Eaton myasthenic syndrome]
  • Leprosy
  • Leptospirosis
  • Leukocytosis (evaluation of)
  • Leukoderma
  • Leukopenia (evaluation of)
  • Leukorrhea (evaluation of)
  • LGIB [lower gastrointestinal bleeding] (evaluation of)
  • LGV [lymphogranuloma venereum]
  • Lice infestation
  • Lichen planus
  • Lichen simplex chronicus
  • Ligament injuries
  • Lightheadedness (evaluation of)
  • Lightning injury
  • Limb girdle muscular dystrophy
  • Limited cutaneous systemic sclerosis
  • Lip, angular cheilitis
  • Lipid disorders
  • Lipoid nephrosis (evaluation of)
  • Lipoma
  • Liposarcoma
  • Listeriosis
  • Liver abscess
  • Liver cirrhosis
  • Liver failure, cirrhosis
  • Lobular carcinoma in situ
  • LOC [loss of consciousness] (evaluation of)
  • Lock jaw
  • Long bone fractures
  • Long QT syndrome
  • Lou Gehrig disease
  • Low back pain
  • Low back pain (evaluation of)
  • LP [lichen planus]
  • LSC [lichen simplex chronicus]
  • LTB [laryngotracheobronchitis]
  • Lumbago
  • Lumbar spondylosis
  • Lumbosacral intervertebral disk disorders
  • Lumbosacral pain (evaluation of)
  • Lung abscess
  • Lung disease, obstructive (overview of)
  • Lupus anticoagulant syndrome
  • Lupus nephritis
  • Lyme disease
  • Lymphedema
  • Lymphogranuloma venereum
  • Lymphoma, MALT [mucosa-associated lymphoid tissue]
  • Lymphoma, thyroid
  • Lysosomal storage diseases