Embryology — Flashcards

Flashcard 181: What is the embryonic origin of the adrenal cortex? _____

Answer: Mesoderm

Extra: Atlas:

Flashcard 182: If the vitelline duct COMPLETELY fails to close, a vitelline _____ develops, which is characterized by meconium discharge from the umbilicus

Answer: fistula (persistent vitelline duct)

Flashcard 183: Patients with Refsum Disease can have skeletal and craniofacial dysmorphism due to _____

Answer: epiphyseal dysplasia

Flashcard 184: What is the adult derivative of the wall of the telencephalon? _____

Answer: Cerebral hemispheres

Flashcard 185: What is the most common site of obstruction (hydronephrosis) in the fetal kidney? _____

Answer: Ureteropelvic junction

Flashcard 186: _____ is a congenital lung malformation that presents as discrete, round, sharply defined and fluid-filled densities on CXR.

Answer: Bronchogenic cyst

Extra: Bronchogenic cysts are abnormal buddings of the foregut and are typically located in the mediastinum or lung parenchyma. They are usually asymptomatic unless they compress nearby structures or become infected.

Flashcard 187: The ductus arteriosus and proximal part of pulmonary arteries are derivatives of the _____ aortic arch

Answer: 6th

Flashcard 188: Failed vertical fusion of the paramesonephric ducts within the urogenital sinus results in a(n) _____

Answer: transverse vaginal septum

Flashcard 189: What embryological disorder results in failure to form the Preoptic Nucleus? _____

Answer: Kallmann Syndrome

Flashcard 190: Which branchial arch gives rise to the lesser horn of hyoid? _____

Answer: 2nd arch