Lymph Nodes of Groin and Axilla, Pop Fossa, Lipomas (Module 3 Unit 1)

Question 1

What is the difference between lymphadenopathy and lymphadenitis?

Answer 1

Lymphadenopathy: abnormal size or consistency caused by inflammation, primary neoplasia, or mets

Lymphadenitis: enlargement of lymph nodes due to inflammatory process (maintains node shape and fatty hilum)

Question 2

What are the features of malignant nodes?

Answer 2

• increase in size
• hypoechoic appearance
• round
• asymmetric cortical thickness
• loss of fatty hilum
• loss of normal nodal vascularity

Question 3

What are two differentials for metastatic lymph nodes in appearance?

Answer 3

• (may be) more echogenic
• can be heterogenous

Question 4

What are the 5 groups of axillary lymph nodes? ALPCA

Answer 4

Anterior, lateral, posterior, central, and apical

Question 5

The inguinal lymph nodes are a major drainage pathway from where?

Answer 5

The lower limbs, genitals, dorsal perineum, inferior aspect of the anterior abdo wall

Question 6

What is more common of lymph nodes in the groin: superficial nodes or deep nodes?

Answer 6

Superficial

Question 7

Where does a baker’s cyst appear?

Answer 7

Posteromedial knee, between the medial head of the gastrocnemius muscle and the semimembranosus tendon

Question 8

What type of cyst has a communication with the knee joint?

Answer 8

Bakers cyst

Question 9

What is the ultrasound appearance of a Bakers cyst?

Answer 9

• well defined cyst with neck
• extends into joint space b/w semimembranosus tendon and medial head of the gastroc

Question 10

What is the 2nd most common type of aneurysm?

Answer 10

Popliteal artery aneurysm

Question 11

What type of aneurysm has a strong connection with an Abdominal Aortic Aneurysm?

Answer 11

Popliteal Artery Aneurysm

Question 12

What is cystic adventitial disease?

Answer 12

Mucous cyst within the adventitial portion of the vessel wall

Question 13

What are large lipomas susceptible to?

Answer 13

Internal fat necrosis