Thoracic Wall and Embryology 2019 Flashcards
Most common breast mass, no
tenderness
Fibroadenoma
18 year-old girl with movable mass
on the breast and not painful
Fibroadenoma
Stab wound at 2nd intercostal
parasternal what would not be hit
Pectoralis minor
Least affected area in breast cancer
Lower inner
Ectoderm derivative
Phrenic nerve
Optic nerve is derived from
Ectoderm (neuroectoderm)
Inhalation/Inspiration muscles except A. Serratus posterior inferior B. Levatores costarum C. External intercostal D. Serratus posterior superior E. Diaphragm
A. Serratus posterior inferior
Most characteristic event on the 3rd
week of development
Gastrulation
Jugular notch
T2
Erythroblastosis fetalis (Hemolytic disease of the newborn)
Fetus: Rh (+)
Mother: Rh (-)
Cause of intrauterine growth
restriction
Smoking
Level of great vessel
Sternal angle
Contraction of the diaphragm,
abdominal pressure _____
Increases
Inhalation
External intercostal muscle
Smooth and rounded part of the rib
Upper border
Duration of pregnancy based on
fertilization
38 weeks
Mesoderm derivative
Femur
Intermediate mesoderm derivative
Urinary system
Fetus begins to move/kick
5th month
External genitalia
12th week
True about 2nd week A. Trophoblast differentiates into two layers: cytotrophoblast and synctiotrophoblast B. Embryoblast forms epiblast and trophoblast (must be epiblast and hypoblast) C. Extraembryonic mesoderm splits into somatic and splanchnic mesoderm (must be somatopleuric and splanchnopleuric mesoderm) D. Two cavities in the 2nd week of development form amniotic cavity and exocoelomic cavity (must be amniotic cavity and blastocyst cavity)
A. Trophoblast differentiates into two
layers: cytotrophoblast and
synctiotrophoblast
Stab in this area will hit serratus
anterior
Midaxillary region
Mitral valve is best heard at
5th intercostal space, midclavicular
Esophageal opening
T10
Best area to palpate breast A. Nipple B. Any place C. Upper quadrant D. Axillary tail
B. Any place
Endodermal derivative
Epithelial lining of the respiratory tract
In thoracostomy, insert tube at what
level?
4th or 5th intercostal space
Origin of the 2nd intercostal artery
Costocervical trunk
Continuous with the mesoderm and
covers the yolk sac
Visceral mesoderm
Drains into the superior vena cava
Azygos vein
Primary organizer
Primitive streak
Stab is considered penetrating if it hit
the ___; Deepest structure in the chest
wall affected by stab wound
Parietal pleura
Highest risk of breast cancer
34 year-old with cancer on both breasts
Greatest risk for cancer
A. Hemiazygos
B. Azygos
C. Accessory hemiazygos
C. Accessory hemiazygos
