A fistula is defined as

A fistula is defined as

• A. An abnormal connection between an organ/vessel and outside the body, or organ/vessel to organ/vessel
• B. A normal connection between skin and tissue
• C. A temporary opening used for drainage
• D. A small puncture wound

Answer: (A)

A fistula is an abnormal passage that forms a connection between two epithelial surfaces or between an organ/vessel and the outside of the body. This creates a path for fluids to pass in an unintended way, which distinguishes it from normal anatomy or simple wounds. It’s not a normal skin–tissue connection, not a temporary drainage opening like a stoma, and not just a small puncture wound. Fistulas can develop from infection, inflammation, trauma, or surgery and can lead to leakage of contents onto the skin or into another organ.

A fistula is an abnormal passage that forms a connection between two epithelial surfaces or between an organ/vessel and the outside of the body. This creates a path for fluids to pass in an unintended way, which distinguishes it from normal anatomy or simple wounds. It’s not a normal skin–tissue connection, not a temporary drainage opening like a stoma, and not just a small puncture wound. Fistulas can develop from infection, inflammation, trauma, or surgery and can lead to leakage of contents onto the skin or into another organ.