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Germinal centers in the bone marrow.

D C Farhi1

  • 1Institute of Pathology, Case Western Reserve University, Cleveland, Ohio 44106.

Hematologic Pathology
|January 1, 1989
PubMed
Summary
This summary is machine-generated.

Bone marrow germinal centers (GCs) were systematically studied in adults. Findings suggest GCs may indicate immune function in the marrow, challenging previous theories.

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Area of Science:

  • Hematology
  • Immunology
  • Histopathology

Background:

  • Germinal centers (GCs) in bone marrow have been previously described but not systematically studied.
  • The role and significance of GCs within the adult bone marrow remain unclear.

Purpose of the Study:

  • To systematically investigate the presence, characteristics, and potential implications of germinal centers in adult bone marrow specimens.
  • To evaluate existing theories regarding the origin and association of bone marrow GCs.

Main Methods:

  • Examination of twelve axial skeleton bone marrow cases (patients aged 29-80 years).
  • Analysis included clot and core biopsies, assessing for GCs, lymphoid aggregates, plasmacytosis, and T cell presence.
  • Histochemical staining (S-100) was utilized to identify associated structures.

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Main Results:

  • Germinal centers were identified in bone marrow specimens, with higher detection rates in clots compared to core biopsies.
  • Associated lymphoid aggregates were observed in 60% of cases, but no instances met criteria for nodular lymphoid hyperplasia.
  • Polyclonal plasmacytosis and scattered T cells were noted, and one case showed coexistence with malignant lymphoma.

Conclusions:

  • The study findings do not support the theories that bone marrow GCs are solely a reaction to splenectomy or a precursor to malignant lymphoma.
  • The presence of GCs suggests a potential role for immune function within the adult bone marrow, possibly analogous to splenic follicular hyperplasia.