Extranodal NK-T-cell lymphoma pathophysiology: Difference between revisions
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==Overview== | ==Overview== | ||
On gross pathology, angiocentric and angiodestructive pattern of growth with associated geographical [[necrosis]] and [[ulceration]] are characteristic findings of extranodal NK-T-cell lymphoma. On microscopic histopathological analysis, medium sized tumor cells and polymorphic infiltrate of nonneoplastic inflammatory cells are characteristic findings of extranodal NK-T-cell lymphoma. | On gross pathology, angiocentric and angiodestructive pattern of growth with associated geographical [[necrosis]] and [[ulceration]] are characteristic findings of extranodal NK-T-cell lymphoma. On microscopic histopathological analysis, medium sized tumor cells and polymorphic infiltrate of nonneoplastic inflammatory cells are characteristic findings of extranodal NK-T-cell lymphoma.<ref name=Hindawi>Extranodal Natural-Killer/T-Cell Lymphoma, Nasal Type. Hindawi Publishing Corporation. http://www.hindawi.com/journals/ah/2010/627401/. Accessed on February 18, 2016 </ref> | ||
==Genetics== | ==Genetics== | ||
Revision as of 15:24, 18 February 2016
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Sowminya Arikapudi, M.B,B.S. [2]
Overview
On gross pathology, angiocentric and angiodestructive pattern of growth with associated geographical necrosis and ulceration are characteristic findings of extranodal NK-T-cell lymphoma. On microscopic histopathological analysis, medium sized tumor cells and polymorphic infiltrate of nonneoplastic inflammatory cells are characteristic findings of extranodal NK-T-cell lymphoma.[1]
Genetics
Immunotype
- The immunophenotype of NK lymphoma cells is classically positive for CD2, CD56, and cytoplasmic CD3 epsilon.
- They are negative for surface CD3. Unlike normal NK cells, the tumor cells are usually negative for CD7 and CD16.
- They express cytotoxic granule associated proteins granzyme B, T-cell restricted intracellular antigen (TIA-1), and perforin.
Gross Pathology
- On gross pathology, angiocentric and angiodestructive pattern of growth with associated geographical necrosis and ulceration are characteristic findings of extranodal NK-T-cell lymphoma.
- Coagulative necrosis and apoptotic bodies are frequently encountered.
Microscopic Pathology
- On microscopic histopathological analysis, medium sized tumor cells and polymorphic infiltrate of non-neoplastic inflammatory cells are characteristic findings of extranodal NK-T-cell lymphoma.
- The tumor cells are small to medium in size with occasional large and anaplastic forms.
- The lymphoma cells may be admixed with a polymorphic infiltrate of nonneoplastic inflammatory cells including small lymphocytes, plasma cells, histiocytes, and eosinophils.
References
- ↑ Extranodal Natural-Killer/T-Cell Lymphoma, Nasal Type. Hindawi Publishing Corporation. http://www.hindawi.com/journals/ah/2010/627401/. Accessed on February 18, 2016