| Abbreviations | Meaning |
 | CHS | Congenital Hypoventilation Syndrome |
 | TORCH | Toxoplasmosis, Other [congenital Syphilis And Viruses], Rubella, Cytomegalovirus, And Herpes Simplex Virus |
 | CROME | Congenital Cataracts-epileptic Fits-mental Retardation [syndrome] |
 | CHD | Congenital Or Congestive Heart Disease |
 | CAR | Congenital Articular Rigidity |
 | CPCL | Congenital Pulmonary Cystic Lymphangiectasia |
 | CIE | Congenital Ichthyosiform Erythroderma |
 | CRB | Chemical, Radiological, And Biological; Congenital Retinal Blindness; Cramer-Rao Bound |
 | CLAH | Congenital Lipoid Adrenal Hyperplasia |
 | CET | Capital Expenditure Threshold; Cholesterol-ester Transfer; Collaborative Eclampsia Trial; Congenital Eyelid Tetrad |
 | CEP | Congenital Erythropoietic Porphyria |
 | CC | Congenital Cataract |
 | CMK | Chloromethyl Ketone; Congenital Multicystic Kidney |
 | CLAS | Congenital Localized Absence Of Skin |
 | CHBHA | Congenital Heinz Body Hemolytic Anemia |