See Rare Diseases by First Letter (K)
- Kabuki Syndrome
- Kallmann Syndrome
- Kallmann Syndrome 3
- Kaposiform Hemangioendothelioma
- Kartagener Syndrome
- Kawasaki Syndrome
- Kennedy Disease
- Keratoconus
- Keratomalacia
- Keratosis, Seborrheic
- Kernicterus
- Kidney Cancer
- Kikuchi Disease
- Klatskin Tumor
- Klebsiella
- Klinefelter Syndrome
- Klippel-Trenaunay Syndrome
- Krabbe Leukodystrophy
- Krukenberg Carcinoma
- KSHV Inflammatory Cytokine Syndrome
