Which gallbladder anomaly is the most common?

Which gallbladder anomaly is the most common?

• A. Phrygian cap
• B. Hartmann pouch
• C. Duplication
• D. Floating (Ectopic)

Answer: (A)

A Phrygian cap is the most common gallbladder anomaly, and it arises from a folding of the gallbladder fundus that gives a cap‑like appearance. It’s a benign shape variant, not a separate organ or a blockage, so the lumen remains a single, continuous cavity. On ultrasound you’ll see the fundus folded on itself with a noticeable cap-like contour, but there’s no true duplication or ectopic positioning. This contrasts with other variants: Hartmann’s pouch is a small mucosal pouch near the neck that can trap debris but is less common than the fundal fold; duplication would mean two gallbladders with separate drainage; and a floating or ectopic gallbladder refers to abnormal position, which is also relatively rare. Thus, the cap‑like fundal fold is the most frequently encountered gallbladder anomaly.

A Phrygian cap is the most common gallbladder anomaly, and it arises from a folding of the gallbladder fundus that gives a cap‑like appearance. It’s a benign shape variant, not a separate organ or a blockage, so the lumen remains a single, continuous cavity. On ultrasound you’ll see the fundus folded on itself with a noticeable cap-like contour, but there’s no true duplication or ectopic positioning. This contrasts with other variants: Hartmann’s pouch is a small mucosal pouch near the neck that can trap debris but is less common than the fundal fold; duplication would mean two gallbladders with separate drainage; and a floating or ectopic gallbladder refers to abnormal position, which is also relatively rare. Thus, the cap‑like fundal fold is the most frequently encountered gallbladder anomaly.