Lactose Intolerance@
Langer-Giedion Syndrome@
Laryngitis@
Larynx Cancer@
Laurence-Moon Syndrome@
Learning Disabilities@
Leber's Congenital Amaurosis@
Lebers Optic Neuropathy@
Legionnaires' Disease@
Leishmaniasis@
Leprosy@
Leptospirosis@

Lesch-Nyhan Syndrome@
Leukemia@
Leukodystrophy@
Lewy Body Disease@
Lice@
Lipoid Nephrosis@
Lissencephaly@
Listeriosis@
Liver Disorders@
Locomotor Ataxia@
Lou Gehrig's Disease@
Lowe Syndrome@

Lumbar Disk@
Lupus@
Lyell's Syndrome@
Lyme Disease@
Lymphangioma@
Lymphatic Filariasis@
Lymphedema@
Lymphogranuloma Venereum@
Lymphoma@
Lymphoreticulosis@