Overall CT features are suggestive of appendiceal mucocele. The presence of low attenuation intraperitoneal loculated fluid collection raises the suspicion of pseudomyxoma peritonei (though no scalloping of visceral surfaces in this case). Absence of wall irregularity and soft tissue thickening suggests the benign process. However, surgical excision with HPE correlation is highly recommended for differentiating the benign and malignant processes.

Patient underwent laparoscopic appendectomy.

Histopathology (peritoneal fluid/mucinous fluid): Pseduomyxoma peritonei

Histopathology (appendectomy): Low grade mucinous cystadenoma. Negative for invasive malignancy.