Malignant chest wall tumors

Q  Most common malignant chest wall tumor
A. Chondrosarcoma
B. Osteosarcoma
C. Synovial sarcoma
D. Rhabdomyosarcoma

Answer to Q 46

Most common tumors of the chest wall are secondaries from elsewhere. The most common malignant tumor of chest wall is .......

Ref Sabiston page 1602

 

Truncus arteriosus

Q ) Which of the following statements about truncus  arteriosus is false?
A. Most infants do well without operations until late childhood.
B. Cyanosis is a late feature
C. Most infants present with congestive heart failure.
D. Repair requires a conduit from right ventricle to pulmonary arteries.

Answer 

In Truncus arteriosus there is a single arterial trunk arising from the ventricles, with single dysplastic valve with

semilunar leaflets and a subvalvular VSD..

Untreated, most infants  do not survive beyond 6 months. Cyanosis is usually not present early, because mixing
mainly occurs at VSD level and the arterial oxygen saturation is generally greater than  85%, but............Read on 

Blood Supply SA Node

Q) SA Node is supplied by which artery

a) Right coronary

b) Left coronary

c) Left circumflex

d) Anterior interventricular


Coronary arteries originate from ascending aorta, above the aortic valves from the aortic sinuses. Right coronary artery passes between the right atrial appendage and pulmonary trunk in the atrio ventricular septum and continues as .......................

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COA- Coarctation of Aorta

Q) Not A complication of untreated coarctation of aorta
a) Endocarditis
b) CVA
c) Congestive heart failure
d) Pulmonary vascular disease


Coarctation of aorta is narrowing that diminishes the aortic lumen and produces an obstruction to the
flow of blood. In untreated patients complications might develop like endocarditis that occur at sites of
turbulent blood flow which is the site of narrowing,..........

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Vascular ring

Q  ) Which is a true vascular ring?

a) Pulmonary artery sling

b) Double aortic arch

c) Cervical aortic arch

d) Origin of subclavian artery from descending aorta

30 ) b 
Double aortic arch is a true (complete) vascular ring where they encircle and may
constrict the trachea and esophagus. Aberrant origin of Rt. SCA from descending
aorta is a partial vascular ring, cervical aortic arch is an aortic arch anomaly
characterized by elongated, high lying aortic arch and is not a vascular ring.

Q) ASD most commonly associated with mitral insufficiency
a) Secundum defect
b) Sinus Venosus defect
c) Ostium primum
d) Coronary sinus defect

Answer