Diagnostic approach to T- and NK-cell lymphoproliferative disorders in the gastrointestinal tract.
Semin Diagn Pathol
; 38(4): 21-30, 2021 Jul.
Article
in En
| MEDLINE
| ID: mdl-34016481
ABSTRACT
Most gastrointestinal NK and T cell lymphomas are aggressive in behavior, although in recent years a subset of indolent lymphoproliferative disorders have been described, which must be distinguished from their more malignant mimics. Intestinal T-cell lymphomas may arise from intra-epithelial lymphocytes and display epitheliotropism, such as enteropathy-associated T-cell lymphoma and monomorphic epitheliotropic intestinal T-cell lymphoma. They are both aggressive in behavior but differ in their clinic-pathological features. On the other hand, intra-epithelial lymphocytes are not prominent in intestinal T-cell lymphoma, NOS, which is a diagnosis of exclusion and probably represents a heterogeneous group of entities. Indolent lymphoproliferative disorders of NK- and T-cells of both CD8 and CD4 subsets share a chronic, recurring clinical course but display differences from each other. CD8+ T-cell lymphoproliferative disorder of GI tract has a low proliferative fraction and does not progress nor undergo large cell transformation. Whilst NK-cell enteropathy runs an indolent clinical course, it may display a high proliferation fraction. On the other hand, CD4+ indolent T-cell lymphoproliferative disorder displays variable proliferation rates and may progress or transform after a number of years. In Asia and South America, it is not uncommon to see involvement of the gastrointestinal tract by EBV-associated extranodal NK/T cell lymphoma, nasal type, which must be distinguished from NK cell enteropathy and EBV-associated mucocutaneous ulcers.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Lymphoma, Extranodal NK-T-Cell
/
Gastrointestinal Diseases
/
Lymphoproliferative Disorders
Type of study:
Diagnostic_studies
Limits:
Humans
Language:
En
Journal:
Semin Diagn Pathol
Journal subject:
PATOLOGIA
Year:
2021
Document type:
Article
Affiliation country:
Singapore