All tumors in the GASTROINTESTINAL TRACT arising from mesenchymal cells (MESODERM) except those of smooth muscle cells (LEIOMYOMA) or Schwann cells (SCHWANNOMA).
gastrointestinal system benign neoplasm +
gastrointestinal system cancer +
Giant Cell Tumors +
hepatobiliary system cancer +
intestinal cancer +
Intestinal Neoplasms +
mastocytosis +
Multiple Polyps and Recurrent Inflammatory Fibroid, Gastrointestinal