- Congenital
- Congenital abnormalities
- Congenital absence of the vas deferens
- Congenital adrenal hyperplasia
- Congenital adrenal hyperplasia due to 21-hydroxylase deficiency
- Congenital afibrinogenemia
- Congenital amegakaryocytic thrombocytopenia
- Congenital amputation
- Congenital analgesia
- Congenital anomaly
- Congenital blindness
- Congenital cataract
- Congenital central hypoventilation syndrome
- Congenital chloride diarrhea
- Congenital chloride diarrhoea
- Congenital contractural arachnodactyly
- Congenital cystic adenomatoid malformation
- Congenital cytomegalovirus infection
- Congenital deafness
- Congenital diaphragmatic hernia
- Congenital disorder
- Congenital disorder of glycosylation
- Congenital disorders
- Congenital dyserythropoietic anemia
- Congenital epulis
- Congenital erythropoietic porphyria
- Congenital fiber type disproportion
- Congenital fibrosis of the extraocular muscles
- Congenital fourth nerve palsy
- Congenital glaucoma
- Congenital hearing loss
- Congenital heart block
- Congenital heart defects
- Congenital heart disease
- Congenital hemolytic anemia
- Congenital hepatic fibrosis
- Congenital hip dislocation
- Congenital hydrocephalus
- Congenital hyperinsulinism
- Congenital hypothyroidism
- Congenital ichthyosiform erythroderma
- Congenital ichthyosis
- Congenital infection
- Congenital insensitivity to pain
- Congenital insensitivity to pain with anhidrosis
- Congenital lymphedema
- Congenital malformations
- Congenital melanocytic nevi
- Congenital muscular dystrophy
- Congenital myasthenic syndrome
- Congenital myopathy
- Congenital nephrotic syndrome
- Congenital nevus
- Congenital nystagmus
- Congenital pulmonary airway malformation
- Congenital rubella syndrome
- Congenital stationary night blindness
- Congenital syphilis
- Congenital toxoplasmosis
- Congestive cardiomyopathy
- Congestive heart failure
- Congestive hepatopathy
- Congo red
- Conidiobolomycosis
- Coniferyl aldehyde
- Coniine
- Conium
- Conivaptan
- Conization
- Conjoined twins
- Conjoint analysis
- Conjoint tendon
- Conjugate
- Conjugate eye deviation
- Conjugate gaze palsy
- Conjugate vaccine
- Conjugated estrogen
- Conjugated estrogens
- Conjugated fatty acids
- Conjugated linoleic acid
- Conjunctiva
- Conjunctival diseases
- Conjunctival flap
- Conjunctival hyperemia
- Conjunctival squamous cell carcinoma
- Conjunctival suffusion
- Conjunctivitis
- Conjunctivochalasis
- Conn's syndrome
- Connected health
- Connecting stalk
- Connectionism
- Connective tissue
- Connective tissue cells
- Connective tissue disease
- Connective tissue diseases
- Connective tissues
- Connectome
- Connectomics
- Connexin
- Connexin 32
- Connexin 43
- Connexins
- Connexons
- Connor-Davidson Resilience Scale
- Conophylline
- Conotoxin
- Consanguinity
- Conscience
- Conscientiousness
- Conscious awareness
- Conscious mind
- Conscious sedation
- Consciousness
- Consensus sequences
- Consent
- Conservative treatment
- Conserved Domain Database
- Conserved sequence
- Consideration of future consequences
- Consolidation
- Consonant
- Consonant clusters
- Conspicuous consumption
- Constant Routine Protocol
- Constipation
- Constipation in children
- Constitutional growth delay
- Constitutional symptoms
- Constitutive heterochromatin
- Constraint induced movement therapy
- Constraint-induced movement therapy
- Constraints
- Constriction
- Constrictive pericarditis
- Constructional apraxia
- Constructivism
- Constructs
- Consultant pharmacists
- Consumer
- Contact allergen
- Contact allergy
- Contact dermatitis
- Contact inhibition
- Contact lenses
- Contact order
- Contact tracing
- Contact urticaria
- Contact-dependent growth inhibition
- Contagious disease