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Cyclin D1 Overexpression in Multiple Myeloma
A Morphologic, Immunohistochemical, and In Situ Hybridization Study of 71 Paraffin-Embedded Bone Marrow Biopsy Specimens

Evangelia Athanasiou MD, Vassiliki Kaloutsi MD, Vassiliki Kotoula MD, Prodromos Hytiroglou MD, Ioannis Kostopoulos MD, Costas Zervas MD, Panagiotis Kalogiannidis MD, Athanasios Fassas MD, John I. Christakis MD, Constantine S. Papadimitriou MD
DOI: http://dx.doi.org/10.1309/BVT4-YP41-LCV2-5GT0 535-542 First published online: 1 October 2001


Cyclin D1 expression was evaluated by immunohistochemical analysis and biotin-labeled in situ hybridization (ISH) in a series of 71 decalcified, paraffin-embedded bone marrow biopsy specimens from patients with multiple myeloma (MM). Cyclin D1 messenger RNA (mRNA) overexpression was detected by ISH in 23 (32%) of 71 cases, whereas cyclin D1 protein was identified by immunohistochemical analysis in 17 (24%) of 71 specimens. All cases that were positive by immunohistochemical analysis also were positive by ISH. Statistically significant associations were found between cyclin D1 overexpression and grade of plasma cell differentiation and between cyclin D1 overexpression and extent of bone marrow infiltration. Our findings demonstrate the following: (1) ISH for cyclin D1 mRNA is a sensitive method for the evaluation of cyclin D1 overexpression in paraffin-embedded bone marrow biopsy specimens with MM. (2) ISH is more sensitive than immunohistochemical analysis in the assessment of cyclin D1 expression. (3) Cyclin D1 overexpression in MM is correlated positively with higher histologic grade and stage.

Key Words:
  • Multiple myeloma
  • Cyclin D1
  • In situ hybridization
  • Immunohistochemistry
  • Paraffin-embedded bone marrow biopsy specimens