Thoracic Wall and Embryology 2019

Question 1

Most common breast mass, no

tenderness

Answer 1

Fibroadenoma

Question 2

18 year-old girl with movable mass

on the breast and not painful

Answer 2

Fibroadenoma

Question 3

Stab wound at 2nd intercostal

parasternal what would not be hit

Answer 3

Pectoralis minor

Question 4

Least affected area in breast cancer

Answer 4

Lower inner

Question 5

Ectoderm derivative

Answer 5

Phrenic nerve

Question 6

Optic nerve is derived from

Answer 6

Ectoderm (neuroectoderm)

Question 7

Inhalation/Inspiration muscles
except
A. Serratus posterior inferior
B. Levatores costarum
C. External intercostal
D. Serratus posterior superior
E. Diaphragm

Answer 7

A. Serratus posterior inferior

Question 8

Most characteristic event on the 3rd

week of development

Answer 8

Gastrulation

Question 9

Jugular notch

Answer 9

T2

Question 10

Erythroblastosis fetalis (Hemolytic
disease of the newborn)

Answer 10

Fetus: Rh (+)
Mother: Rh (-)

Question 11

Cause of intrauterine growth

restriction

Answer 11

Smoking

Question 12

Level of great vessel

Answer 12

Sternal angle

Question 13

Contraction of the diaphragm,

abdominal pressure _____

Answer 13

Increases

Question 14

Inhalation

Answer 14

External intercostal muscle

Question 15

Smooth and rounded part of the rib

Answer 15

Upper border

Question 16

Duration of pregnancy based on

fertilization

Answer 16

38 weeks

Question 17

Mesoderm derivative

Answer 17

Femur

Question 18

Intermediate mesoderm derivative

Answer 18

Urinary system

Question 19

Fetus begins to move/kick

Answer 19

5th month

Question 20

External genitalia

Answer 20

12th week

Question 21

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)

Answer 21

A. Trophoblast differentiates into two
layers: cytotrophoblast and
synctiotrophoblast

Question 22

Stab in this area will hit serratus

anterior

Answer 22

Midaxillary region

Question 23

Mitral valve is best heard at

Answer 23

5th intercostal space, midclavicular

Question 24

Esophageal opening

Answer 24

T10

Question 25

Best area to palpate breast
A. Nipple
B. Any place
C. Upper quadrant
D. Axillary tail

Answer 25

B. Any place

Question 26

Endodermal derivative

Answer 26

Epithelial lining of the respiratory tract

Question 27

In thoracostomy, insert tube at what

level?

Answer 27

4th or 5th intercostal space

Question 28

Origin of the 2nd intercostal artery

Answer 28

Costocervical trunk

Question 29

Continuous with the mesoderm and

covers the yolk sac

Answer 29

Visceral mesoderm

Question 30

Drains into the superior vena cava

Answer 30

Azygos vein

Question 31

Primary organizer

Answer 31

Primitive streak

Question 32

Stab is considered penetrating if it hit
the ___; Deepest structure in the chest
wall affected by stab wound

Answer 32

Parietal pleura

Question 33

Highest risk of breast cancer

Answer 33

34 year-old with cancer on both breasts

Question 34

Greatest risk for cancer
A. Hemiazygos
B. Azygos
C. Accessory hemiazygos

Answer 34

C. Accessory hemiazygos