Intracholecystic papillary neoplasm: potential differential diagnosis before a gallbladder polyp

Area of Science:

• Gastroenterology and Hepatology
• Surgical Pathology
• Oncology

Background:

• Intracholecystic papillary neoplasia (IPN) is a rare gallbladder lesion with premalignant potential.
• IPN can progress to gallbladder carcinoma in over 50% of cases.
• Diagnosis is often incidental following cholecystectomy for gallbladder polyps.

Observation:

• A case of incidental IPN diagnosis is presented following laparoscopic cholecystectomy.
• The patient presented with a gallbladder polyp, leading to the surgical specimen examination.
• The IPN was identified incidentally during histopathological analysis.

Findings:

• Intracholecystic papillary neoplasia demonstrates premalignant behavior.
• In the absence of an invasive component, clinical surveillance is the recommended management.
• A 5-year survival rate of 90% is associated with non-invasive IPN.

Implications:

• Highlights the importance of histopathological examination of gallbladder specimens, even for seemingly benign polyps.
• Emphasizes the need for vigilant follow-up of incidentally diagnosed IPN.
• Suggests that conservative management with clinical surveillance is appropriate for non-invasive IPN, avoiding unnecessary surgical interventions.