Lei Tang MD, Presenter: Nothing to Disclose

Ying-Shi Sun MD, PhD, Abstract Co-Author: Nothing to Disclose

Zi-Yu Li, Abstract Co-Author: Nothing to Disclose

Fei Shan, Abstract Co-Author: Nothing to Disclose

Xiaoting Li, Abstract Co-Author: Nothing to Disclose

Xiao-Peng Zhang MD, Abstract Co-Author: Nothing to Disclose

Jia-Fu Ji, Abstract Co-Author: Nothing to Disclose

1.To introduce how to improve the detection of unobvious peritoneal metastasis lesions. 2.To briefly review the common sites and signs of peritoneal metastasis of gastric cancer. 3.To illustrate the uncommon sites of peritoneal metastasis. 4.To introduce the uncertain signs of peritoneal metastasis.

1. How to improve the detection ability: 1) Multi-planar reconstruction and reasonable reading order to guarantee the full detection. 2) Wide window to demonstrate the fat tissue structures clearly. 3) Spectral CT to improve the resolution and facilitate quantitative evaluation. 2. Common sites and signs of peritoneal metastasis: 1) Omental cake. 2) Thickening or nodular of parietal peritoneal. 3. Uncommon sites of peritoneal metastasis 1) Transverse mesocolon 2) Hepatogastric ligament 3) Perihepatic peritoneum 4) Bilateral paracolic sulci 5) Small mesenteric 4. Unobvious signs of peritoneal metastasis 1) Smudge sign: mild type,slightly and evenly increased fat density appeared as GGO; moderate type, unevenly increased fat density, with patchy-like or intensive GGO; severe type, unevenly and obviously increased fat density, with multiple strands, curls sign or blurred small nodules. 2) Small amount of ascites (>50ml): >90% probability of metastasis. 3) The opportunity to perform diagnostic laparoscopy.

http://abstract.rsna.org/uploads/2014/14011053/14011053_ijx8.pdf

Tang, L, Sun, Y, Li, Z, Shan, F, Li, X, Zhang, X, Ji, J, The Peritoneal Metastasis of Gastric Cancer on Spectral CT: Uncommon Sites and Uncertain Signs.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14011053.html