Syndromes and Chromosomal Anomalies

Chapter 79


Syndromes and Chromosomal Anomalies



A large number of syndromes, dysplasias, and chromosomal anomalies are associated with congenital or acquired cardiac and vascular disease. This chapter discusses the cardiovascular features of some commonly encountered lesions. A more extensive list is provided in Tables 79-1 to 79-3.



Table 79-1


Syndromes, Dysplasias, and Their Associated Cardiovascular Anomalies































































































































































Syndrome Cardiovascular Anomalies
Achondrogenesis PDA, ASD, VSD, COA
Alagille syndrome (arteriohepatic dysplasia)
(see e-Fig. 79-13)
PS, PPS, ASD, VSD, TOF, PDA, PAT, PAPVR, dysplastic AV valves, COA
Apert syndrome (acrocephalosyndactyly) ASD, PDA, VSD, PS, TOF, EFE, DEXTRO, COA
Arthrogryposis CMY
Beckwith-Wiedemann syndrome (EMG syndrome) CM, CMY, ASD, PDA, TOF, HPLH, subvalvular AS, cardiac fibromas
Cardioauditory syndromes LVH, RVH
Cantrell syndrome (pentalogy of Cantrell) (see e-Fig. 79-14) Combined sternal, pericardial, intracardiac, diaphragmatic, and anterior abdominal wall defects
Radiographic findings: sternal defect, ectopia cordis, CHD, ASD, VSD, PS, TOF, APVR, DEXTRO, ventricular diverticulum, intrapericardial herniation of abdominal organs; associated with Turner, trisomy 18, sirenomelia, and amniotic band syndromes
Cardiosplenic (heterotaxy) syndromes (see Figs. 79-1 and 79-2)  
 Right isomerism (see Fig. 79-1) TAPVR, AVSD, pulmonary outflow obstruction or PAT, DORV, TGA, single atrium (R), single common ventricle, DEXTRO, TAT, TRU (rare), AO-IVC juxtaposition, bilateral right PAs, bilateral SVC, interrupted IVC
 Left isomerism (see Fig. 79-2) Cardiac malposition, single atrium (L), single ventricle, VSD, AVSD, DORV, APVR, interrupted IVC, bilateral left PAs, bilateral SVC
Cayler syndrome (cardiofacial syndrome) ASD, PDA, VSD, AVSD, TOF, RAA, COA
CHARGE association ASD, VSD, conotruncal malformations, PDA, TOF, parachute mitral valve
Degos syndrome (malignant atrophic papulosis) MI, pericarditis, constrictive pericarditis, myocardial fibrosis, and renal, cerebral, coronary, visceral, and peripheral arteriopathy
Diamond-Blackfan syndrome (congenital red cell aplasia) VSD, ASD, mitral valve dysplasia
Ehlers-Danlos syndrome (see Fig. 79-3) MVP, dilated AO root, coronary and aortic aneurysms, dissection or rupture, AS, AR, TR, PS, ASD, VSD, TOF, DEXTRO, LV rupture, arteriovenous fistula
Ellis–van Creveld syndrome (chondroectodermal dysplasia) Common atrium, ASD, AVSD
Fryns syndrome Septal defects, arch anomalies, TOF, cystic hygroma
Hallermann-Streiff syndrome (oculomandibulofacial syndrome) PS, TOF, ASD, VSD
Holt-Oram syndrome (heart-hand syndrome) (see e-Fig. 79-10) ASD, VSD, MVP, PDA, HPLH, TAPVR, TRU, conduction disorder, hypoplastic peripheral vessels
Jeune syndrome (asphyxiating thoracic dystrophy) CHF
Kartagener syndrome (primary ciliary dyskinesia) (see e-Fig. 79-11) DEXTRO, CHD
Klippel-Trénaunay-Weber syndrome (angioosteohypertrophy syndrome) CHF, pericardial effusion, superficial varices, telangiectatic nevi, organ hemangiomas, lymphatic obstruction
LEOPARD syndrome (cardiomyopathic lentiginosis) (see e-Fig 79-8) CMY, conduction defect, PS, sub-AS
Loeys-Dietz syndrome (see Fig. 79-5) Congenital heart defects include patent ductus arteriosus, bicuspid aortic valve, bicuspid pulmonary valve, mitral valve prolapse, and atrial septal defect; arterial tortuosity, stenoses, aneurysms, dissection, diffuse arterial involvement; spontaneous rupture of viscera
Marfan syndrome (see Fig. 79-4) MVP, MR, dilation of AO root, AR, CHF, aneurysms (AO, pulmonary, ductus), AO dissection, MI, arrhythmia, TR, ASD, TOF
MELAS syndrome CMY, CHF, conduction abnormalities
Mucolipidosis III AR
Mucopolysaccharidoses  
 IH (Hurler syndrome) Acute CMY associated with EFE, AR, MR, MS, arteriopathy (coronary, renal, AO, mesenteric)
 IS (Scheie syndrome) AS, MS
 II (Hunter syndrome) AR, CHF, valve thickening, CMY
 III (Sanfilippo syndrome) CMY, MR, AR
 IV (Morquio syndrome) AR, CMY, AS, MR, CAD
 VI (Maroteaux-Lamy syndrome) AS, MS, CMY
Neurofibromatosis type 1 (see Fig. 79-6) PS, COA, ASD, VSD, CMY, MVP, AS, TOF, PDA, vasculopathy (coronary, pulmonary, renal, systemic), cardiac neurofibroma, arteriovenous fistula, lymphatic abnormality
Noonan syndrome (Turner phenotype with normal karyotype) PS, dysplastic pulmonic valve, hypertrophic CMY, lymphatic abnormalities, PDA, ASD, COA, mitral valve abnormalities, AS, pericarditis, APVR, coronary anomalies
Oculoauriculovertebral dysplasia (Goldenhar syndrome) TOF, VSD, DORV, PAT, TAPVR, RAA, COA, asplenia
PHACES Arch atresia, aberrant subclavian origins, hypoplasia of the descending thoracic aorta, double aortic arch, COA, stenosis and aneurysm formation of the aorta and the cervical arteries, stroke
Progeria (Hutchinson-Gilford syndrome) Accelerated atherosclerosis, CM, MI, CHF, stroke
Proteus syndrome CHD, CMY, myocardial mass, conduction abnormality, venous dilation, hemangioma, lymphangioma
Ravitch syndrome (thoracoabdominal wall defect) Ectopia cordis, pentalogy of Cantrell, TGA, PDA, ASD, VSD, PS, TOF
Robinow syndrome (fetal face syndrome) CHD (right heart lesions)
Rubinstein-Taybi syndrome ASD, VSD, PDA, COA, PS, bicuspid AO valve
Silver-Russell syndrome CHD
Smith-Lemli-Opitz syndrome ASD, complex cardiac anomalies
Thrombocytopenia–absent radius (TAR) syndrome COA, ASD, VSD, PDA, AVSD, TOF
Tuberous sclerosis (Bourneville-Pringle syndrome) (see Fig. 79-7) Rhabdomyoma, hamartoma, CHF, CMY, COA, arrhythmia, arterial aneurysm and stenosis (AO, cerebral, renal, peripheral)
VATER/VACTERL association (see Fig. 79-9) VSD, ASD, PDA, TOF, TGA, single ventricle
Velocardiofacial syndrome (Shprintzen syndrome) TOF, TRU, PA, VSD, absent pulmonary valve, TGA, AS, interrupted AO arch, RAA
Williams syndrome (e-Fig. 79-12) Supravalvular AS, PPS, MR, ASD, VSD, TOF, MI, COA, interrupted arch, hypoplastic AO, aneurysm or stenosis (AO, systemic, renal, cerebral arteries)
Zellweger syndrome (cerebrohepatorenal syndrome) CHD, PDA, VSD, DiGeorge

AO, Aorta or aortic; APVR, anomalous pulmonary venous return; AR, aortic regurgitation; AS, aortic stenosis; ASD, atrial septal defect; AV, atrioventricular; AVSD, atrioventricular septal defect; CAD, coronary artery disease; CHARGE, coloboma, heart defects, atresia choanae, retardation of growth and development, genitourinary problems, ear abnormalities; CHD, congenital heart disease; CHF, congestive heart failure; CM, cardiomegaly; CMY, cardiomyopathy; COA, coarctation of the aorta; DEXTRO, dextrocardia; DORV, double-outlet right ventricle; EFE, endocardial fibroelastosis; EMG, exomphalos, macroglossia, gigantism; HPLH, hypoplastic left heart; IVC, inferior vena cava; L, left; LEOPARD, lentigines, electrocardiographic conduction abnormalities, ocular hypertelorism, pulmonary stenosis, abnormal genitalia, retardation of growth, deafness; LV, left ventricle; LVH, left ventricular hypertrophy; MELAS, mitochondrial myopathy, encephalopathy, lactic acidosis, stroke; MI, myocardial infarction; MR, mitral regurgitation; MS, mitral stenosis; MVP, mitral valve prolapse; PA, pulmonary artery; PAPVR, partial anomalous pulmonary venous return; PAT, pulmonary atresia; PDA, patent ductus arteriosus; PHACES, posterior fossa brain malformations, hemangiomas of the face, arterial anomalies, cardiac anomalies, eye abnormalities, sternal clefting or supraumbilical raphe; PPS, peripheral pulmonary stenosis; PS, pulmonary stenosis; R, right; RAA, right aortic arch; RVH, right ventricular hypertrophy; SVC, superior vena cava; TAPVR, total anomalous pulmonary venous return; TAT, tricuspid atresia; TGA, transposition of the great arteries; TOF, tetralogy of Fallot; TR, tricuspid regurgitation; TRU, truncus arteriosus; VACTERL, vertebral, anal atresia, cardiac, tracheal, esophageal, renal, limb; VATER, vertebral defects, VSD, imperforate anus, tracheoesophageal fistula, radial and renal dysplasia; VSD, ventricular septal defect.



Table 79-2


Syndromes that Predominantly Affect the Cardiovascular System




























































Syndrome Cardiovascular Defects
Absent pulmonary valve leaflet syndrome (see e-Fig. 79-15) Maldeveloped nodular myxoid pulmonary valve cusps with aneurysmal dilation of central PAs associated with TOF, airway compression, lobar emphysema and abnormal PA branching, CM, RAA, ASD, VSD, PDA, DORV, AVSD, Marfan syndrome, 18q deletion
Berry syndrome Distal AP window with AO origin of the right PA and arch interruption
Bland-White-Garland syndrome Anomalous origin of left coronary artery from PA
Congenital cardiomyopathy: hypertrophic cardiomyopathy Asymmetric septal hypertrophy, systolic anterior motion of mitral valve, LVOT obstruction, myocardial scar arrhythmias
Arrhythmogenic right ventricular dysplasia Fibrofatty infiltration of right ventricular myocardium, RV dyskinesia/aneurysms, arrhythmias
Eisenmenger syndrome Pulmonary hypertension with bidirectional or reversed shunt at atrial, ventricular, or AP level; cyanosis; dyspnea; sudden death; peripartum CMY radiographic findings: dilated central PAs with tapering, PA calcification
Floppy valve syndrome MVP, prolapse of other valves, CAD, congestive or hypertrophic CMY, ASD, MR, AR, papillary muscle or chordae tendineae rupture
Hypoplastic left heart syndrome Combined mitral and AO obstruction (stenosis or atresia), underdeveloped LA and LV, hypoplastic ascending AO ± COA or AO interruption; may be associated with right diaphragmatic hernia, omphalocele, brain anomalies; radiographic findings: CM and pulmonary edema
Lutembacher syndrome ASD associated with MS
Postmyocardial infarction syndrome (Dressler syndrome) Chest pain, fever, polyserositis—several weeks postinfarction; radiographic findings: pericardial or pleural effusion, noncardiogenic edema
Postpericardiotomy syndrome Chest pain, fever, joint pain—weeks or months after closed or open heart surgery; radiographic findings: pericardial or pleural effusion, noncardiogenic pulmonary edema, constrictive pericarditis
Romano-Ward syndrome Familial Q-T prolongation, arrhythmias, syncope
Shone syndrome (or complex) (see e-Fig. 79-16) Complex of multiple left-sided obstructions, parachute mitral valve, supravalvular ring of LA, sub-AS, COA
Sick sinus syndrome Arrhythmias
Tetralogy of Fallot (see Fig. 79-9 and e-Fig. 79-15) Combination of VSD, overriding AO, RVH, RV outflow obstruction; may be PS and PPS
Trilogy of Fallot PS, ASD (or PFO), right-to-left shunting
Uhl syndrome (anomaly) Congenital aplasia of RV myocardium, RV CMY
Wolff-Parkinson-White syndrome Aberrant intracardiac ECG pathway producing arrhythmias; associated with Ebstein anomaly, IHSS, levo-TGA, giant RA diverticulum

AO, Aorta or aortic; AP, aorticopulmonary; AR, aortic regurgitation; AS, aortic stenosis; ASD, atrial septal defect; AVSD, atrioventricular septal defect; CAD, coronary artery disease; CM, cardiomegaly; CMY, cardiomyopathy; COA, coarctation of the aorta; DORV, double-outlet right ventricle; ECG, electrocardiogram; IHSS, idiopathic hypertrophic subaortic stenosis; LA, left atrium; LV, left ventricle; LVOT, left ventricular outflow tract; MR, mitral regurgitation; MS, mitral stenosis; MVP, mitral valve prolapse; PA, pulmonary artery; PDA, patent ductus arteriosus; PFO, patent foramen ovale; PPS, peripheral pulmonary stenosis; PS, pulmonary stenosis; RA, right atrium; RAA, right aortic arch; RV, right ventricle; RVH, right ventricular hypertrophy; TGA, transposition of the great arteries; TOF, tetralogy of Fallot; VSD, ventricular septal defect.



Table 79-3


Chromosomal Anomalies and Their Associated Cardiovascular Defects
















































Chromosomal Anomaly Cardiovascular Defects
Fragile X MVP, MR, AR, TR, dilated AO root, COA
Trisomy 13 (Patau syndrome) PDA, VSD, ASD, DEXTRO, capillary hemangioma, cervical cystic hygroma
Trisomy 18 (Edwards syndrome) VSD, polyvalvular heart disease (pulmonary and AO valves), ASD, PDA, COA, TOF, TGA, HPLH, VACTERL, pentalogy of Cantrell
Trisomy 21 (Down syndrome) (see Fig. 79-18) AVSD, VSD, ASD, TOF, PDA, PS, MVP, aberrant right SCA, intimal arterial fibrodysplasia, lymphatic abnormality, upper airway obstruction and CHF
Cat-eye syndrome (trisomy or tetrasomy 22) TAPVR, TOF
Monosomy X, XO (Turner syndrome) (see Fig. 79-19) COA, bicuspid AO valve, AO dissection, septal defects, abnormal mitral valve, sub-AS, PS, APVR, pentalogy of Cantrell, DEXTRO, RAA, hemangioma, lymphangiectasia, venous anomalies
XXY (Klinefelter syndrome) MVP, Takayasu arteritis, cerebral aneurysms, varicose veins
Deletion Syndromes  
Monosomy 1p36 syndrome Dilated CMY, PDA
22q11 (predominantly DiGeorge syndrome (CATCH 22), also velocardiofacial syndrome) (see Fig. 79-17) Type B interrupted arch, RAA, VSD, TOF, TRU, COA, aberrant right SCA, isolated SCA
5p: Cri du chat syndrome CHD
4p: Wolf-Hirschhorn syndrome ASD, VSD, valve anomalies, complex CHD, persistent left SVC
17p: Miller-Dieker syndrome (lissencephaly type 1) ASD, CHD, conduction abnormalities
18q syndrome Absent pulmonary valve, PDA, AS, dilated ascending AO

AO, Aorta or aortic; APVR, anomalous pulmonary venous return; AR, aortic regurgitation; AS, aortic stenosis; ASD, atrial septal defect; AVSD, atrioventricular septal defect; CATCH 22, cardiac defects, abnormal facies, thymic hypoplasia, cleft palate, hypocalcemia, 22q11 deletions; CHD, congenital heart disease; CHF, congestive heart failure; CMY, cardiomyopathy; COA, coarctation of the aorta; DEXTRO, dextrocardia; HPLH, hypoplastic left heart; L, left; MR, mitral regurgitation; MVP, mitral valve prolapse; PDA, patent ductus arteriosus; PS, pulmonary stenosis; RAA, right aortic arch; SCA, subclavian artery; SVC, superior vena cava; TAPVR, total anomalous pulmonary venous return; TGA, transposition of the great arteries; TOF, tetralogy of Fallot; TR, tricuspid regurgitation; TRU, truncus arteriosus, VACTERL, vertebral, anal atresia, cardiac, tracheal fistula, esophageal atresia, renal, limb; VSD, ventricular septal defect.



Syndromes



Situs and Cardiosplenic (Heterotaxy) Syndromes





Overview: The heterotaxy syndromes, that is, right and left isomerism, feature abnormalities of the visceral situs. These syndromes have an estimated incidence of 1 in 6000 to 1 in 20,000 live births and account for 1% of all congenital heart defects. Although heterotaxy usually occurs sporadically, familial cases have been described.


Although visceral and atrial situs do not always correspond, body situs (from the Latin word meaning location) generally is divided into three types: solitus, inversus, and ambiguus. Situs solitus is the normal arrangement of the viscera in the body (see Chapter 63). Situs inversus is the mirror image of normal; it is seen in 0.01% of the population and is associated with a slightly higher incidence of congenital heart disease (3% to 5%) compared with the solitus population (0.6% to 0.8%). The most common cardiac abnormalities seen in patients with situs inversus are a right-sided aortic arch, atrioventricular discordance, and transposition of the great vessels. Situs ambiguus, or heterotaxy, encompasses all other visceroatrial arrangements. By definition, in situs ambiguus, visceral malposition and dysmorphism associated with an indeterminate atrial arrangement are present.1


Heterotaxy syndrome with right isomerism or bilateral right-sidedness is usually, but not invariably, accompanied by asplenia.1 The condition is more common in males and is characterized by bilateral systemic atria with broad trabeculated appendages (Fig. 79-1), bilateral trilobed lungs with bilateral minor fissures and short eparterial bronchi, a central horizontal liver, bowel malrotation, and the stomach in an indeterminate position (see Fig. 79-1). The abdominal aorta and inferior vena cava often are located on the same side of the spine, frequently in a posterior-anterior orientation. Other occasional anomalies include tracheoesophageal fistula, imperforate anus, absent gallbladder, pancreatic anomalies, fused adrenal glands, and genitourinary abnormalities.2 The prognosis for right isomerism is poor because of an abnormal immune status (asplenia) and the typically complex cardiac anomalies.



image


Figure 79-1 A, Right isomerism in a 3-year-old girl. Volumetric left anterior oblique, three-dimensional, computed tomographic angiography reconstruction demonstrates bilateral symmetric broad atrial appendages (arrows) consistent with right atrial morphology. Note also the anteriorly transposed ascending aorta. B-E, A newborn infant with complex congenital heart disease and heterotaxy with right isomerism. B, This coronal minimum intensity projection reconstruction demonstrates symmetric short mainstem bronchi consistent with bilateral right-sided bronchial branching. Bilateral minor fissures also are visible (arrows). C, A coronal volumetric reconstruction demonstrates a horizontal liver with no spleen. The patient has complex congenital heart disease consisting of a common atrioventricular canal (not shown), L-transposition and pulmonary atresia, and total anomalous pulmonary venous return. On this image the left-sided ascending aorta (AO) is seen arising from the left-sided morphologic right ventricle (RV). D, Sagittal volumetric reconstruction demonstrates the anteriorly positioned transposed ascending aorta (AO), absent pulmonary artery, and an anomalously draining confluence of pulmonary veins (arrows) extending below the diaphragm to the portal vein. E, Thin maximum intensity projection demonstrates a large patent ductus arteriosus (arrow) as the sole source of flow to the branch pulmonary arteries (the main pulmonary artery is absent). The anomalous inferiorly draining pulmonary veins (arrowhead) also are seen, partially obscured by dense contrast in the inferior vena cava.


Cardiac anomalies are almost invariable and cause the most common presenting symptoms: cyanosis and severe respiratory distress. The “right isomerism heart” often consists of a common atrioventricular canal, a single ventricle, a large ventricular septal defect (VSD), and a double-outlet right ventricle and/or transposition of the great vessels, along with pulmonary outflow obstruction or atresia and total anomalous pulmonary venous drainage (frequently obstructed) (see Fig. 79-1). The spectrum of cardiovascular anomalies also can include cardiac malposition (dextrocardia or mesocardia), tricuspid atresia, truncus arteriosus, right aortic arch, anomalous systemic venous return, and bilateral superior vena cavae.2,3


Heterotaxy syndrome with left isomerism or bilateral left-sidedness most often accompanies polysplenia. It is characterized by bilateral pulmonary atria with narrow fingerlike appendages, bilateral bilobed lungs, bilateral long hyparterial bronchi, a centrally located liver, the stomach in an indeterminate position, bowel malrotation, and multiclefted or multiple spleens (either right sided or left sided) (Fig. 79-2). An interrupted inferior vena cava with azygos continuation is the most consistent abdominal finding in left isomerism (see Fig. 79-2). Left isomerism is slightly more common in females and generally has a better prognosis than right isomerism with less complex cardiovascular disease. Other associated anomalies include ciliary dyskinesia, biliary atresia, and other gastrointestinal abnormalities including bowel malrotation and pancreatic anomalies, as well as congenital portosystemic shunts (see Fig. 79-2).2,4



image


image


Figure 79-2 This 3-year-old girl, whose mother was diabetic, has polysplenia and Abernethy malformation with hepatopulmonary syndrome.
A, A posteroanterior view of the chest shows heterotaxy with a left-sided cardiac apex, right-sided stomach (arrow), and left-sided liver. Cardiomegaly and increased pulmonary vascularity (a small atrial septal defect and pulmonary arteriovenous shunting) are present. It is difficult to see the bilateral left-sided bronchi. A prominent right paraspinal line is present as a result of an enlarged azygos vein (arrowhead). B, The lateral view of the chest is notable for the absence of the inferior vena cava shadow. C, Contrast-enhanced computed tomography (CT) scan of the chest shows cardiomegaly, a left-sided aorta (arrow), prominent pulmonary veins, and an enlarged azygos vein (arrowhead). D, A contrast-enhanced CT scan of the chest displayed in the lung window shows the presence of multiple dilated peripheral pulmonary vessels (arrows). E, Coronal reconstruction from a contrast-enhanced CT scan of the upper abdomen shows right-sided polysplenia (S), a right-sided stomach (white arrow), and a left-sided liver. A large right-sided portosystemic shunt (splenic vein to renal vein) is present (open arrow). Superiorly, there is interruption of the inferior vena cava (IVC) with azygos continuation (not shown). F, A left pulmonary artery angiogram from a right jugular approach shows dilated peripheral pulmonary arteries and micro arteriovenous connections, consistent with hepatopulmonary syndrome as a result of the congenital portosystemic shunt. This child does not have liver disease, and the intrahepatic portal veins are present but small (Abernethy malformation type II). G, Perfusion portion of a ventilation-perfusion scan using technetium-99m macroaggregated albumin performed after closure of the patient’s atrial septal defect shows normal perfusion of the lungs. There is abnormal radiotracer uptake within the brain (arrow) and kidneys (arrowhead). The percentage of systemic tracer uptake was calculated at 44.7%. These findings are typical of a right-to-left arteriovenous shunt and confirm the presence of hepatopulmonary syndrome.


Cardiac anomalies are seen in more than 50% of patients who have heterotaxy syndrome with left isomerism. The common cardiovascular anomalies include abnormalities of the inferior and superior vena cavae, cardiac malposition, atrial septal defect (ASD), VSD, common atrioventricular canal, double-outlet right ventricle, and anomalous pulmonary venous return (usually partial).2,3


Dec 20, 2015 | Posted by in PEDIATRIC IMAGING | Comments Off on Syndromes and Chromosomal Anomalies

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