Short MCQs Thorax

Question 1

Camper’s fascia is continuous with?

Answer 1

Overlying external oblique aponeurosis, slides freely

Continuous with superficial fascia of penis (Buck’s) and superficial perineal fascia (Colle’s)

Attached to fascia lata along flexure at crease of hip and extends laterally from pubic tubercle below inguinal ligament

Question 2

Thoracic wall blood supply
-Arterial?
-Venous?

Answer 2

Arterial
Flanks- intercostal, subcostal and lumbar arteries
Ventral midline- internal thoracic, superior and inferior epigastric

Venous
-Below umbilicus great saphenous vein
-Above umbilicus to lateral thoracic vein then axillary
-Also para-umbilical veins accompany ligamentum teres into left branch of portal vein

Venous communication between thoracoepigastric uniting lateral thoracic and superficial epigastric vein above inguinal ligament
Communication between SVC and IVC

Question 3

Subcutaneous lymphatic drainage chest wall?

Answer 3

Follow axillary and superficial inguinal nodes

Above umbilicus-
Front of body to anterior (pectoral) nodes
Back- posterior (scapular) nodes

Below umbilicus-
Anterior wall and perineum to medial group
Posterior wall- lateral group of superficial inguinal nodes

Question 4

Subcutaneous nerve supply to thoracoabdominal wall

Answer 4

Above 2nd rib and manubriosternal joint= supraclavicular branches of cervical plexus C4

Below this level at midline and paramedian strip by anterior cutaneous branches of spinal nerves T2-L1
Umbilicus= T10
Suprapubic= L1

Broad lateral strip= lateral cutaneous branch of spinal nerves T2 or 3 to L1 emerging at mid-axillary line

Iliac crest and buttock= Lateral cutaneous branches of T12 and iliohypogastric L1

ilioinguinal nerve has NO lateral cutaneous branch, has collateral branch from iliohypogastric from L1

Posterior skin= posterior rami of spinal nerves and medial branches in upper thoracic and lateral branches in lower thoracic and lumbosacral branch