Non-malignant Peritoneal Involvement Mimicking Peritoneal Carcinomatosis

Peritoneal carcinomatosis is a diffuse and metastatic involvement of the peritoneum. Unfortunately, there are several common and    uncommon    malignant       and      non- malignant entities that may mimic peritoneal carcinomatosis on imaging. Wide variety of non-neoplastic mimickers can be categorized into tumor-like involvements, granulomatous infections, and systemic or fat-based diseases. Although definite diagnosis based on imaging alone is often impossible and usually the final decision is only made after tissue diagnosis, but also in some conditions, there are suggestive or characteristic radiologic findings on different imaging modalities that may help the radiologist to narrow the main differential diagnosis. Thus this lecture reviews the important imaging features of non-malignant peritoneal involvements specially the common diseases such as tuberculosis, with an emphasis on key findings on CT scan that may suggest different type of management.
Keywords: Peritoneal Carcinomatosis; Peritoneum; non-malignant; Tuberculosis