PMID- 26275199 OWN - NLM STAT- MEDLINE DCOM- 20170215 LR - 20171116 IS - 1998-3603 (Electronic) IS - 0970-9290 (Linking) VI - 26 IP - 3 DP - 2015 May-Jun TI - Expression of CD 68, CD 45 and human leukocyte antigen-DR in central and peripheral giant cell granuloma, giant cell tumor of long bones, and tuberculous granuloma: An immunohistochemical study. PG - 295-303 LID - 10.4103/0970-9290.162872 [doi] AB - BACKGROUND: Multinucleated giant cells (MNCs) form an integral part of numerous bone and soft tissue tumors, tumor-like lesions and are often associated with granulomas of immunological and nonimmunological origin. The presence of various types of giant cells depends on the lesions in which they are present which are difficult to be diagnosed under routine histological techniques. Immunohistochemistry can be used for a better diagnosis and understanding of the origin of various giant cells using various markers of immune response like human leukocyte antigen-DR (HLA-DR) and those expressed on monocytes and macrophages like CD 68 and leukocyte common antigen (LCA). MATERIALS AND METHODS: The study group consisted of 10 cases of giant cell tumor (GCT) of long bones, tuberculous granuloma, and giant cell granuloma to evaluate and analyze the expression pattern of LCA, CD 68, and HLA-DR in various giant cell lesions. RESULTS: Strong expression of CD 68 was observed in 80% of the lesions, strong and moderate expression of CD 45 observed in 70% of the lesions among and within the groups. In contrast, HLA-DR demonstrated negative expression in 80% of cases except for tuberculous granuloma where all the 10 cases showed moderate to strong immunoreactivity. CONCLUSION: CD 68 and CD 45 expression was found in central giant cell granuloma, peripheral giant cell granuloma and GCT, suggesting the origin from mononuclear phagocyte system and considering their clinical behavior of osteoclast type. High expressivity of HLA-DR in tuberculous granulomas which is an essential factor for presentation of the microbial antigen to CD 4 helper cells thus reassuring the fact that they are up-regulated in response to infection. FAU - Kumar, Anoop AU - Kumar A FAU - Sherlin, Herald J AU - Sherlin HJ AD - Department of Oral and Maxillofacial Pathology, Saveetha Dental College, Chennai, Tamil Nadu, India. FAU - Ramani, Pratibha AU - Ramani P FAU - Natesan, Anuja AU - Natesan A FAU - Premkumar, Priya AU - Premkumar P LA - eng PT - Journal Article PL - India TA - Indian J Dent Res JT - Indian journal of dental research : official publication of Indian Society for Dental Research JID - 9202990 RN - 0 (HLA Antigens) RN - EC 3.1.3.48 (Leukocyte Common Antigens) MH - Bone Neoplasms/*immunology MH - Giant Cell Tumors/*immunology/pathology MH - Granuloma, Giant Cell/*immunology/pathology MH - HLA Antigens/*metabolism MH - Humans MH - Immunohistochemistry MH - Leukocyte Common Antigens/*immunology MH - Macrophages/pathology EDAT- 2015/08/15 06:00 MHDA- 2017/02/16 06:00 CRDT- 2015/08/15 06:00 PHST- 2015/08/15 06:00 [entrez] PHST- 2015/08/15 06:00 [pubmed] PHST- 2017/02/16 06:00 [medline] AID - IndianJDentRes_2015_26_3_295_162872 [pii] AID - 10.4103/0970-9290.162872 [doi] PST - ppublish SO - Indian J Dent Res. 2015 May-Jun;26(3):295-303. doi: 10.4103/0970-9290.162872.