Mixed Adenocarcinoid Tumor Presenting as Acute Appendicitis

Area of Science:

• Gastroenterology
• Surgical Oncology
• Pathology

Background:

• Mixed adenocarcinoid tumors of the appendix are uncommon neoplasms.
• Clinical presentation often mimics acute appendicitis or can be asymptomatic.
• Diagnosis is frequently incidental during histopathological examination post-appendectomy.

Observation:

• A 53-year-old male presented with acute abdominal pain and fever.
• Appendectomy was performed, and the patient recovered.
• Histopathological examination revealed a mixed adenocarcinoma with carcinoid features.

Findings:

• Mixed adenocarcinoid tumors exhibit aggressive behavior, similar to adenocarcinomas.
• Rapid metastasis is a characteristic feature.
• The patient developed peritoneal metastasis with adenocarcinoma features within 3 months.

Implications:

• Early and accurate histopathological diagnosis is crucial for mixed appendiceal tumors.
• Prognosis is heavily influenced by tumor aggressiveness and metastatic potential.
• This case underscores the need for vigilance regarding potential metastasis in mixed adenocarcinoid appendiceal neoplasms.