What does GANT stand for?

Gastrointestinal stromal tumors that express S100 were formerly classified as gastrointestinal autonomic nerve tumors (37); however, this nomenclature has been abandoned since there is no clinical utility in separating gastrointestinal autonomic nerve tumors from GISTs.

There is a case report of a gastrointestinal autonomic nerve tumor (GANT), a subpopulation of GISTs, showing organoid or whorls patterns in most areas of the tumor.

The epithelioid variant of leiomyosarcoma, malignant peripheral nerve sheath tumor, and gastrointestinal autonomic nerve tumor were also included in the differential diagnosis; however, the sprinkling of lymphocytes throughout the tumor, coupled with the storiform or whorled growth pattern of the spindle tumor cells in some areas, and the syncytial appearance of the tumor cells were important indications of an FDC sarcoma.