NCIt definition : An indolent lymphoproliferative disorder that affects the gastrointestinal tract.
The neoplastic lymphocytes have the typical phenotype of NK-cells, are of medium to
large size, show mild pleomorphism, and are EBV infection negative. Features that
characterize extranodal NK/T-cell lymphomas (e.g., angioinvasion and angiodestruction)
are not present.;