Repeated USMLE Questions Step 1- Review- 40

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Q- Transposition of great vessels is incompatible with life unless it is accompanied by which one of the following conditions?

A-Aortic stenosis

B-Tetralogy of Fallot

C-Truncus arteriosus

D-Ventricular septal defect

D-Ventricular septal defect- Transposition of great vessels is incompatible with life unless there is any shunt allow mixing of blood such as PDA or VSD.



Q- Which one of the following is the most common cause of Cushing syndrome in adults?

A-Carcinoma of the adrenal gland

B-Exogenous corticosteroids

C-Hyperplasia of the adrenal cortex

D-Primary adrenal adenoma

B-Exogenous corticosteroids- Any of the choices can cause Cushing syndrome by high level of cortisol but the most common cause is the use of corticosteroids.



Q- Which one of the following conditions is characterized by dysphagia, iron deficiency anemia and the presence of esophageal webs?

A-Barrett esophagus

B-Gastroesophageal reflux disease (GERD)

C-Mallory-Weiss syndrome

D-Plummer-Vinson syndrome

D-Plummer-Vinson syndrome- The triad of dysphagia, iron deficiency anemia and esophageal webs is characteristic of this condition. Other conditions have different presentations and etiologies.



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