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Congenital hearing loss
Congenital hearing loss is deafness present at birth, about half genetic and half environmental; congenital CMV is the leading nongenetic cause, detected through universal newborn hearing screening.
Congenital heart block
Congenital heart block: fetal/neonatal AV conduction disorder, usually autoimmune from maternal anti-SSA/Ro and anti-SSB/La antibodies (neonatal lupus), detected 16-24 weeks, ~20% mortality, most survivors need pacemakers.
Congenital heart defect
A congenital heart defect is a structural abnormality of the heart or great vessels present at birth, affecting nearly 1% of live births and leading causes of infant mortality.
Congenital hereditary endothelial dystrophy type II
Congenital hereditary endothelial dystrophy type II (CHED2, Maumenee corneal dystrophy, OMIM 217700) is a rare autosomal recessive corneal dystrophy caused by SLC4A11 mutations on 20p13, causing bilateral corneal clouding from birth, treated by keratoplasty.
Congenital herpes simplex virus infection
Congenital herpes simplex virus infection (neonatal HSV, HSV-1/HSV-2): in-utero HSV infection of newborns, about 5% of neonatal herpes; classified as SEM, CNS, or disseminated disease; treated with IV acyclovir.
Congenital hiatus hernia
Congenital hiatus hernia (congenital hiatal hernia, ICD-11 LB13.1): herniation of abdominal contents, usually the stomach, through the esophageal hiatus into the mediastinum from disordered diaphragm development; rare in children, treated with repair plus fundoplication.
Congenital high airway obstruction syndrome
Congenital high airway obstruction syndrome (CHAOS) is a rare fetal blockage of the larynx or trachea causing overdistended lungs and hydrops; delivery via EXIT-to-tracheostomy enables survival.
Congenital Horner syndrome
Congenital Horner syndrome is a rare condition present from birth in which oculosympathetic nerve damage causes a constricted pupil, drooping eyelid, and often a lighter-colored iris.
Congenital human immunodeficiency virus infection
Congenital human immunodeficiency virus infection (ICD-11 KA62.6, congenital AIDS) is HIV acquired in utero via vertical transmission, confirmed by virologic NAT in the neonate; preventable with maternal ART, which has cut perinatal transmission to 1% or less.
Congenital hydrocele
Congenital hydrocele (ICD-11 KC00) is fluid around a newborn's testicle(s) from failed obliteration of the processus vaginalis; communicating or noncommunicating, it usually resolves within the first year, with surgery reserved for persistence or hernia.
Congenital hydrocephalus
Congenital hydrocephalus (ORPHA:2185, ICD-10 Q03) is in-utero ventricular enlargement from impaired CSF circulation, occurring in 0.3-2.5 per 1,000 live births, treated by shunt or ETV.
Congenital hydronephrosis
Congenital hydronephrosis, also called antenatal hydronephrosis or fetal urinary tract dilation, is prenatal dilation of the renal pelvis found in 1-2% of pregnancies, usually transient, most often from ureteropelvic junction obstruction, graded by SFU or UTD systems.
Congenital hypertonia
Congenital hypertonia (ICD-10 P94.1; ICD-11 KB08.1) is abnormally high muscle tone present from birth, less common than hypotonia in newborns, caused by central, spinal, or peripheral disorders and treated with therapy, botulinum toxin, and muscle relaxants.
Congenital hypoplastic anaemia
Congenital hypoplastic anaemia, the original name for Diamond-Blackfan anemia (DBA), is a rare inherited ribosomopathy causing macrocytic anemia in infancy, congenital anomalies, ribosomal protein gene mutations, and elevated leukemia and osteosarcoma risk; distinct from ICD-11 KA8C neonatal blood-loss anemia.
Congenital hypothyroidism due to iodine deficiency
Congenital hypothyroidism due to iodine deficiency (endemic cretinism, ICD-10 E00): thyroid hormone deficiency at birth from inadequate maternal or neonatal iodine, usually transient, preventable by universal salt iodization.
Congenital hypotonia
Congenital hypotonia (floppy baby syndrome, ICD-11 KB08.2) is abnormally decreased muscle tone present at birth, mostly central (60-80%) in origin; rapid exome/genome sequencing diagnoses over 50% of NICU cases.
Congenital ichthyosiform erythroderma
Congenital ichthyosiform erythroderma (CIE, NBCIE, nonbullous congenital ichthyosiform erythroderma) is a rare autosomal recessive congenital ichthyosis with generalized fine white scaling, erythroderma, collodion membrane at birth, and ABCA12, ALOX12B, or ALOXE3 mutations.
Congenital ichthyosis-intellectual disability-spastic quadriplegia syndrome
A rare autosomal recessive syndrome, also known as ELOVL4-related neuro-ichthyosis, caused by mutations in the ELOVL4 gene and combining congenital ichthyosis with intellectual disability, infantile-onset seizures, and spastic tetraplegia.
Congenital infiltrating lipomatosis of the face
Congenital infiltrating lipomatosis of the face (CIL-F, facial infiltrating lipomatosis) is a rare PIK3CA-related overgrowth disorder causing unilateral facial fat infiltration, bony hypertrophy, early tooth eruption, and high surgical recurrence.
Congenital insensitivity to pain
Congenital insensitivity to pain (CIP, congenital analgesia) is an extremely rare genetic inability to feel pain from birth, caused by genes such as NTRK1, SCN9A, and PRDM12, leading to self-mutilation, fractures, and, in CIPA/HSAN IV, anhidrosis.
Congenital insensitivity to pain syndrome, Marsili type
Marsili syndrome (MARSIS, OMIM 147430), congenital insensitivity to pain syndrome, Marsili type: rare autosomal dominant ZFHX2 (14q11.2) disorder with lowered pain, temperature, and sweat sensing; painless fractures and burns, preserved touch and visceral pain.
Congenital insensitivity to pain with anhidrosis
Congenital insensitivity to pain with anhidrosis (CIPA, HSAN type IV) is a rare autosomal recessive NTRK1 disorder causing inability to feel pain and temperature, absent sweating, recurrent fevers, self-mutilation, and intellectual disability.
Congenital intestinal motility disorders
Congenital intestinal motility disorders (ICD-11 DA90.2) are congenital small-intestinal disorders with severely impaired bowel movement and malabsorption, including chronic idiopathic intestinal pseudo-obstruction, familial visceral myopathy, and MMIHS-related conditions.
Congenital intrahepatic arterioportal fistula
Congenital intrahepatic arterioportal fistula is a rare vascular malformation of the liver, present from birth, in which an abnormal connection links the hepatic artery to the portal vein.
Congenital isolated ACTH deficiency
Congenital isolated ACTH deficiency (IAD, OMIM 201400) is a rare neonatal endocrine disease with severe hypoglycemia, cholestatic jaundice, and seizures, caused mainly by TBX19 mutations and treated with hydrocortisone.
Congenital knee dislocation
Congenital knee dislocation (CKD), congenital dislocation of the knee, is a rare birth defect with knee hyperextension and anterior tibial displacement, incidence about 1 in 100,000, often linked to Larsen syndrome or arthrogryposis, treated first with early serial casting.
Congenital lactase deficiency
Congenital lactase deficiency (alactasia, OMIM 223000) is a rare autosomal recessive LCT-gene disorder, mainly Finnish, causing severe watery diarrhea from breast milk within days of birth; treated with lifelong lactose-free formula.
Congenital lactic acidosis, Saguenay-Lac-Saint-Jean type
Congenital lactic acidosis, Saguenay-Lac-Saint-Jean type, also known as Leigh syndrome, French-Canadian type, is a rare autosomal recessive mitochondrial disease caused by LRPPRC mutations, affecting about 1 in 2,000 births in the Saguenay–Lac-Saint-Jean region of Quebec.
Congenital laryngeal cyst
Congenital laryngeal cyst (ICD-10 Q31.8), a rare neonatal larynx or supraglottic cyst causing stridor and airway obstruction; saccular or ductal; treated by endoscopic marsupialization or excision.
Congenital laryngeal palsy
Congenital laryngeal palsy, or congenital vocal cord paralysis (ORPHA:137932, ICD-10 J38.0), is a rare neonatal larynx anomaly with unilateral or bilateral vocal cord paralysis causing stridor and feeding difficulty; most cases resolve in 6-12 months.