Prospective Database of Gastrointestinal Stromal Cell Tumors (GISTs)

Prospective Database of Gastrointestinal Stromal Cell Tumors (GISTs)

Specific Aim 1: To determine patient compliance with a GIST surveillance program Hypothesis: Patient compliance with a GIST surveillance program will be low.

Specific Aim 2: To determine if EUS features of GIST, particularly maximum size, change significantly during a surveillance program.

Hypothesis: EUS features of GIST, particularly maximum size, will not change significantly during a surveillance program.

Specific Aim 3: To determine if EGD measures of GIST size correlate well with EUS measures of GIST size.

Hypothesis: EGD measures of GIST size will correlate well with EUS measured of GIST size.

Inclusion Criteria:

• presenting for EUS with an indication for a SEL in the stomach or esophagus
• at least 18 years of age
• able to provide informed consent

Exclusion Criteria:

• no subepithelial lesion in the stomach or esophagus'
• less than 18 years of age
• unable to provide informed consent