Inguinal Lymph Node

INTRODUCTION:
  • An Inguinal lymph node is a type of lymph node in the inguinal region. 
  • The mean size of an inguinal lymph nodes, as measured over the short-axis, is approximately 5.4 mm (range 2.1-13.6 mm), with two standard deviations above the mean being 8.8 mm 
TYPES OF INGUINAL LYMPH NODE:
  • Superficial inguinal lymph nodes
  1. Inferior 
  2. Superolateral
  3. Superomedial 
  4. Deep inguinal lymph nodes
ANATOMY:
  • Superficial Inguinal Lymph Nodes
  • Group of 12–20 nodes that lie in the subcutaneous tissue below the inguinal ligament and along the terminal part of the great saphenous vein
  1. They are subdivided into three groups of lymph nodes 
  2. Nodi lymphoidei: inferior (inferiores , vertical) group :superficial inguinal lymph nodes, located inferior to the saphenous opening, receiving drainage of the lower limb Superolateral (superolaterales , lateral horizontal) group:superficial inguinal lymph nodes located lateral to the saphenous opening, receiving drainage of lateral buttock and lower anterior abdominal wall
  3. Superomedial (superomediales , medial horizontal) group:superficial inguinal lymph nodes, located medial to the saphenous opening, receiving drainage of the perineum and external genitalia.
Deep Inguinal Lymph Nodes:
  • The deep inguinal lymph nodes are located medial to the femoral vein and under the cribriform fascia.
  • There are approximately 3 to 5 deep nodes.
  • The superior-most node is located under the inguinal ligament and is called Cloquet's node.
  • They are contained within the femoral triangle.
  • Arranged near and along the femoral vein of the leg.
  • Drain the deep parts of the lower limbs, women's clitorus, and men's penis
  • Connected to the superficial lymph nodes and send their drainage to those via lymph vessels.
DRAINAGE:
  • Superficial Inguinal Lymph Node:
  • They drain the skin and subcutaneous tissue of the lower abdominal wall, perineum, buttocks, external genitalia, and lower limbs
  • Deep Inguinal Lymph Node:
  • The deep inguinal lymph nodes drain superiorly to the external iliac lymph nodes, then to the pelvic lymph nodes and on to the paraaortic lymph nodes.
AFFERENTS RECIEVED:
  • Superficial Inguinal Lymph Node receive as afferents lymphatic vessels from :
  1. Integument of the penis
  2. Scrotum
  3. Perineum
  4. Buttock
  5. Abdominal wall below the level of the umbilicus
  6. Back below the level of the iliac crest
  7. Vulva
  8. Anus (below the pectinate line)
  • The thigh and the medial side of the leg (the lateral leg drains to the popliteal lymph nodes first).
  1. Deep Inguinal Lymph Node Recieves Their Afferent From:
  2. Lymphatics from glans penis
  3. women's clitoris
  4. Prostatic urethra
  5. Spongy urethra 
  6. Deep parts of lower limb 
  7. Superficial inguinal nodes 
Exam Question
  • Lymphatics from glans penis, women's clitoris,prostatic urethra, spongy urethra ,deep parts of lower limb and superficial inguinal nodes drains into deep inguinal lymph nodes.
  •  Integument of the penis, Scrotum, Perineum ,Buttock, Abdominal wall below the level of the umbilicus ,Back below the level of the iliac crest, Vulva, Anus (below the pectinate line) ,The thigh and the medial side of the leg (the lateral leg drains to the popliteal lymph nodes first). drains into superficial inguinal lymph nodes.
Don't Forget to Solve all the previous Year Question asked on Inguinal Lymph Node