B cell small lymphocytic lymphoma/chronic lymphocytic leukemia

From Libre Pathology
Revision as of 11:15, 10 June 2014 by Michael (talk | contribs) (split out)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

B cell small lymphocytic lymphoma/chronic lymphocytic leukemia, often referred to as chronic lymphocytic leukemia (abbreviated CLL) or small lymphocytic lymphoma (abbreviated SLL), is a common low-grade hematologic malignancy. That typically afflicts older individuals.

General

  • Very common.
  • Good prognosis.

Richter's transformation

  • CLL/SLL may under go a Richter's transformation into a high-grade non-Hodgkin's lymphoma (NHL), e.g. DLBCL:[1]
    • Incidence of transformation <5%.
    • Prognosis < 1 year.

Microscopic

Features in a lymph node:[2]

  • Mixed population of lymphoid cells with "proliferation centers" - key feature:
    1. Larger cells (~ 1.5x the size of resting lymphocyte ~ 12-15 micrometers):
      • Nucleoli.
      • Form (nodular) collections.
    2. Small dark cells (~ size of resting lymphocyte ~ 8-10 micrometers):
      • Predominant population.
      • Lack nucleolus.

Images

  • CLL - low mag. (WC)

  • CLL - intermed. mag. (WC)

  • CLL - high mag. (WC)

  • CLL - very high mag. (WC)

www:

IHC

  • CD20 +ve.
  • CD5 +ve.
  • CD23 +ve -- occasionally negative.[3]
  • CD43 +ve.

Others:

  • Cyclin D1 -ve.

Molecular

See also

References

  1. ↑ Tsimberidou AM, Keating MJ (April 2006). "Richter's transformation in chronic lymphocytic leukemia". Semin. Oncol. 33 (2): 250–6. doi:10.1053/j.seminoncol.2006.01.016. PMID 16616072.
  2. ↑ DG. 17 August 2010.
  3. ↑ URL: http://path.upmc.edu/cases/case296/dx.html. Accessed on: 14 January 2012.
Retrieved from "https://librepathology.org/w/index.php?title=B_cell_small_lymphocytic_lymphoma/chronic_lymphocytic_leukemia&oldid=31972"