Question

Lymphatics from the spongy urethra drain into the following lymph nodes:

• A. Superficial inguinal nodes
• B. Internal inguinal nodes
• C. Deep inguinal nodes
• D. Sacral nodes

Hint:

Spongy urethra and glans follow the same path as the distal penis, into the deep inguinal group.

Answer 1

The Correct Option is C

Step 1: Recall the parts of the male urethra: prostatic, membranous, and spongy (penile) urethra. The question is about lymphatic drainage of the spongy urethra.
Step 2: Lymph from the spongy (penile) urethra drains mainly to the deep inguinal nodes. Some lymphatics may also reach the external iliac nodes, but the deep inguinal nodes are the principal and best answer among the options given.
Step 3: Compare with neighbouring structures so the distractors are clear. The skin of the penis and the scrotum drain to the superficial inguinal nodes. The glans penis and the spongy urethra drain to the deep inguinal nodes. The prostatic and membranous urethra drain to the internal iliac nodes.
Step 4: Evaluate the options. Superficial inguinal nodes (A) take skin of penis and scrotum, not the spongy urethra. Internal inguinal nodes (B) is not a standard named group. Sacral nodes (D) drain the rectum and pelvic viscera, not the spongy urethra. Deep inguinal nodes (C) is correct.
Answer: Option C (Deep inguinal nodes).