Imaging of perianal inflammatory diseases / 
Massimo Tonolini, Giovanni Maconi, editors. 
 - Milan :  Springer,  2013. 
 - xiv, 229 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9788847028463  RM521.26 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Anal Canal--ultrasonography.<br/>Perineum--ultrasonography.<br/>Inflammatory bowel diseases--Ultrasonography.