Eponyms beginning with C
- Christ-Siemens-Weech syndrome
- Christensen's disease
- Christensen-Krabbe disease
- Christian's brachydactyly syndrome
- Christian's syndrome I
- Christian's syndrome II
- Christian-Andrews-Conneally-Muller syndrome
- Christian-Opitz syndrome
- Christian-Schüller disease
- Christian’s syndrome
- Christmas disease
- Christmas' factor
- Chrobak's operation
- Chrobak's symptom
- Churg-Strauss disease
- Churg-Strauss syndrome
- Churg-Strauss vasculitis
- Chvostek's sign (František Chvostek)
- Chvostek's sign II (Franz Chvostek)
- Chvostek's symptom (Franz Chvostek)
- Chvostek's tremor
- Chwechweechwe (African name)
- Cinderella complex
- Cinderella dermatosis
- Cinderella stepmother syndrome