NAME :  CT IMAGING OF PRIMARY PERITONEAL TUMORS WITH PATHOLOGICAL CORRELATION.
AUTHORS : Dr Rashmi Chand.
LEARNING OBJECTIVE
The purpose of the exhibit is to review the CT imaging patterns of primary peritoneal tumors  and to  correlate the imaging findings with pathological features .
BACK GROUND
 There is a wide spectrum of disease that can involve the peritoneum, ranging from non-neoplastic to malignant processes. Imaging features of diffuse peritoneal disease is often non specific because primary, secondary malignant and benign process often result in similar changes. However, careful evaluation of both imaging and clinical factors will aid in narrowing the diagnosis. We will present a comprehensive review of the primary tumors that involve the peritoneum .
 IMAGING FINDINGS AND PROCEDURE DETAILS
This exhibit will describe various primary peritoneal tumor and demonstrate the characteristic CT appearances using images from patients referred to our institution with histological confirmation. MDCT imaging is approximately 90% sensitive in the detection of peritoneal neoplastic lesions greater than 5 mm. Based on the proposed histogenesis they are classified into
1. Mesothelial
2. Epithelial
3. Smooth muscle
4. Uncertain origin groups
imaging features of each sub type is discussed in detail along with histological images.
CT scan also plays an important role in guiding biopsy for tissue diagnosis and assist with the management of disease namely in surgical planning.
CONCLUSION
Primary peritoneal tumors are an uncommon group of diverse pathological disorders. They share a common anatomic site of origin and have overlapping imaging features, yet are distinctly different clinically.Their imaging appearances overlap with those of diffuse peritoneal metastatic disease and infectious disease.Differentiating primary peritoneal tumors from metastatic disease is important clinically so that patient management is appropriate.

European Society of Gastrointestinal and Abdominal Radiology 28th ANNUAL MEETING