Fig. 2From: How clinical imaging can assess cancer biologyRectal gastrointestinal stromal tumor (GIST) (white asterisk) in a 68-year-old man. a Optical colonoscopic image showed a rectal tumor (arrow). b Endorectal ultrasonographic (US) image (right) with strain elastogram (left) showed that tumor (asterisk) appeared harder (more blue) than the reference tissue on the elastogram. c A cut surface of the surgical specimen revealed a well-defined homogeneous aspect of the submucosal mass (GIST)Back to article page