R**********n
发帖数: 473 | 1 a 4cm bronchogenic cyst is an incidental finding at autopsy of a 55 yr old
man. the cyst most likely arose from which of the following embryologic
stuctures?
a allantois
b foregut
c mesonephric duct
d metanephric duct
e omphalomesenteric duct
answer b, why? thanks thanks thanks | a********7
发帖数: 61 | 2 yes. answer is B.
the congenital bronchial cysts are caused by dialtion of bronchi and may be
solitary or multiple, filled with air or fluid, multiple cysts demonstrate a
honeycomb appearance on x-rays.
Portion fo forgut involvled in repiratory development. Ventral wall of the
primitive foregut during week 4 ---> laryndogracheal diverticulum ---->lung
bud ----> two bronhical buds ---> primary bronchi in week5. ( from BRS p140-
141). | R**********n
发帖数: 473 | |
|
