Lymph nodes for area inferior to pectinate line of anal canal drain to which nodal group?

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Multiple Choice

Lymph nodes for area inferior to pectinate line of anal canal drain to which nodal group?

Explanation:
Lymphatic drainage of the anal canal is divided by the pectinate line. The portion below this line is continuous with the skin of the perineum and drains to the superficial inguinal lymph nodes, reflecting its superficial, cutaneous nature. The area above the line, in contrast, drains with the internal iliac nodes due to its visceral mucosal origin. Therefore, the region inferior to the pectinate line prefers the superficial inguinal lymph node group, while above it would go to internal iliac nodes.

Lymphatic drainage of the anal canal is divided by the pectinate line. The portion below this line is continuous with the skin of the perineum and drains to the superficial inguinal lymph nodes, reflecting its superficial, cutaneous nature. The area above the line, in contrast, drains with the internal iliac nodes due to its visceral mucosal origin. Therefore, the region inferior to the pectinate line prefers the superficial inguinal lymph node group, while above it would go to internal iliac nodes.

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