Coniunctivitis vernalis syn — Crises vago-vagales Gowers syn
- coniunctivitis vernalis syn. syndr. Angelucci
- conjugate gaze paralysis syndrome (англ.) syn. syndr. Cogan (II)
- constrictive pericarditis of pulmonary artery (англ.) syn. syndr. Gouley
- contergan-baby syndrome (англ.) syn. syndr. Wiedemann (I)
- contractura Dupuytren syn. syndr. Dupuytren
- contractura Ledderhose syn. syndr. Ledderhose
- corkscrew esophagus (англ.) syn. syndr. Barsony-Teschendorf
- cornea farinata syn. syndr. Vogt
- cornea guttata senilis et praesenilis syn. syndr. Vogt
- cornea verticillata syn. syndr. Fleischer (II)
- corneal dystrophy-lattice type (англ.) syn. syndr. Haab-Dimmer
- corona venosa Sahli syn. syndr. Sahli
- coxa plana syn. syndr. Calve-Legg-Perthes
- craniopathia metabolica syn. syndr. Morgagni
- craniopathia neuroendocrinica syn. syndr. Morgagni
- craniopharyngeoma syn. syndr. Erdheim (I)
- craniosynosteosis — radial aplasia syndrome (англ.) syn. syndr. Bailer-Gerold
- cranium bifidum occultum frontale hereditarium syn. syndr. de Myer
- cretinismus hypoparathyreoidicus syn. syndr. Martin-Albright
- crises vago-vagales Gowers syn. syndr. Gowers (II)
