Peritoneal Metastases from Appendiceal Cancer.

Area of Science:

• Oncology
• Gastroenterology
• Surgical Pathology

Background:

• Appendiceal cancer presents diagnostic challenges, often mimicking appendicitis.
• Late-stage diagnosis is common due to non-specific early symptoms.
• Current diagnostic modalities like colonoscopy have limited utility for appendiceal neoplasms.

Purpose of the Study:

• To highlight the diagnostic difficulties and typical presentation of appendiceal cancer.
• To emphasize the importance of incidental findings during surgery.
• To discuss the patterns of metastasis in appendiceal mucinous lesions.

Main Methods:

• Review of clinical presentations and diagnostic pathways for appendiceal cancer.
• Analysis of incidental findings during surgical exploration for presumed appendicitis.
• Evaluation of the role of colonoscopy in appendiceal cancer diagnosis.

Main Results:

• Early symptoms of appendiceal cancer frequently mimic appendicitis.
• Diagnosis is often incidental during surgery or at advanced stages with peritoneal/systemic spread.
• Appendiceal mucinous lesions rarely exhibit systemic or extraperitoneal metastases.

Conclusions:

• Appendiceal cancer requires high clinical suspicion, especially when symptoms overlap with appendicitis.
• Surgical exploration remains a key diagnostic opportunity.
• Metastatic patterns differ, with mucinous subtypes showing limited extra-abdominal spread.