- Kabuki Syndrome - 3 Studies
- Kallmann Syndrome - 19 Studies
- Kaposi Sarcoma - 27 Studies
- Kaposi Varicelliform Eruption - 6 Studies
- Kaposiform Hemangioendothelioma - 4 Studies
- Kartagener Syndrome - 22 Studies
- Kasabach-Merritt Syndrome - 4 Studies
- Kawasaki Disease - 25 Studies
- Kearns-Sayre Syndrome - 6 Studies
- Keloid - 27 Studies
- Kennedy Disease - 25 Studies
- Keratitis - 27 Studies
- Keratitis, Herpetic - 6 Studies
- Keratoconjunctivitis - 25 Studies
- Keratoconjunctivitis Sicca - 24 Studies
- Keratoconus - 30 Studies
- Keratoderma, Palmoplantar - 2 Studies
- Keratomalacia - 25 Studies
- Keratosis - 25 Studies
- Keratosis, Actinic - 27 Studies
- Keratosis, Seborrheic - 12 Studies
- Kernicterus - 4 Studies
- Ketosis - 29 Studies
- Kidney Calculi - 30 Studies
- Kidney Diseases, Cystic - 25 Studies
- Kidney Tubular Necrosis, Acute - 8 Studies
- Kikuchi Disease - 2 Studies
- Klatskin Tumor - 25 Studies
- Klebsiella Infections - 24 Studies
- Kleine-Levin Syndrome - 2 Studies
- Klinefelter Syndrome - 25 Studies
- Klippel-Trenaunay Syndrome - 13 Studies
- Klippel-Trenaunay-Weber Syndrome - 13 Studies
- Knee Dislocation - 3 Studies
- Knee Injuries - 28 Studies
- Korsakoff Syndrome - 3 Studies
- Krabbe Disease - 21 Studies
- Krukenberg Carcinoma - 3 Studies
- Krukenberg Tumor - 3 Studies
- Kwashiorkor - 17 Studies
- Kyphosis - 25 Studies