Gastrointestinal stromal malignancy arises from which of the following -
"Gastrointestinal stromal tumors (GIST) originate from the interstitial cells of Cajal, which controls gastrointestinal peristalsis."

On rare occasions, gastric GISTs occur as part of tumor - syndrome, such as :-


Carney's trads → Gastric GIST, Paraganglioma and pulmonary chondroma.
Neurofibromatosis Type I


Histologically, GISTs can be divided into


Spindle types → Exhibit spindle cells
Epithelioid types → Exhibit epithelioid cells
Mixed types → A mixture of both
Smooth muscle
Nerve cells
Interstitial cells of Cajal
Vascular Endothelium