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Diffuse large B cell lymphomaÀε¥ ¸Å¿ì ±ä Á¶Á÷°Ë»ç °á°ú¸¦ ¹Þ¾Ò½À´Ï´Ù. ÀÏ´Ü ¿Å±é´Ï´Ù.

Stomach, LC of antrum, biopsy (x8) : DIFFUSE LARGE B-CELL LYMPHOMA

[Result of immunohistochemistry]

Conclusion) Immunoprofiles are consistent with non-GCB type by Hans algorithm.

[Result of in-situ hybridization]

[C-MYC gene study by FISH]

Method: FISH analysis was performed on formalin-fixed, paraffin-embedded tissue using Vysis LSI¢ç C-MYC dual color, break apart probe (Abbott Molecular) and 50 non-overlapping nuclei were counted. The cutoff value for positivity is 3% for break apart probe.

Comment: C-MYCÀº 8q24¿¡ À§Ä¡ÇÕ´Ï´Ù. Burkitt lymphoma´Â 90% À̻󿡼­ C-MYC translocationÀÌ ÀÖÀ¸¸ç ´ëºÎºÐ IgH(14q32)¿ÍÀÇ fusionÀÔ´Ï´Ù. Diffuse large B-cell lymphoma¿¡¼­´Â C-MYC translocationÀÌ 5-14% ÀÖÀ¸¸ç IgHº¸´Ù IgL À̳ª non-IG gene¿¡ fusionµÈ °æ¿ì°¡ ¸¹½À´Ï´Ù. C-MYC°ú BCL-2 ¸ðµÎ translocationÀÌ ÀÖ´Â °æ¿ì ¡®double hit lymphoma¡¯¶ó°í Çϸç, ÈξÀ ³ª»Û ¿¹Èĸ¦ º¸ÀÔ´Ï´Ù. ÀÌ °Ë»ç´Â C-MYCÀÇ translocation ¿©ºÎ¸¸ È®ÀÎÇϹǷÎ, fusion partner geneÀÌ ¾î¶² °ÍÀÎÁö´Â ¾Ë ¼ö ¾ø½À´Ï´Ù. (Ott, Hematol ASH Educ Prog. 2013 2013:575)

[Result of BCL-2 FISH analysis]

Method: FISH analysis was performed on formalin-fixed, paraffin-embedded tissue using Vysis BCL-2 dual color, break apart probes (Abbott Molecular). The cutoff value for positive was 3% for breakapart probe.

Comment: BCL-2´Â 18q21¿¡ À§Ä¡Çϸç follicular lymphomaÀÇ 75~85%¿¡¼­ BCL-2/IgH translocationÀÌ ÀϾ´Ï´Ù. Diffuse large B-cell lymphomaÀÇ 18-20%¿¡¼­µµ Bcl-2ÀÇ translocationÀÌ ÀÖÀ¸¸ç, germinal center B-cell subtypeÀÇ °æ¿ì BCL-2ÀÇ translocationÀÌ ÀÖÀ¸¸é ³ª»Û ¿¹Èĸ¦ º¸Àδٴ º¸°í°¡ ÀÖ½À´Ï´Ù. BCL-2¿Í C-MYC À¯ÀüÀÚ ¸ðµÎ translocationÀÌ µÈ °æ¿ì ¡®double hit lymphoma¡¯¶ó°í Çϸç, ÈξÀ ³ª»Û ¿¹Èĸ¦ º¸ÀÔ´Ï´Ù. ÀÌ °Ë»ç´Â BCL2ÀÇ translocation ¿©ºÎ¸¸ È®ÀÎÇϹǷÎ, fusion partner geneÀÌ ¾î¶² °ÍÀÎÁö´Â ¾Ë ¼ö ¾ø½À´Ï´Ù. (Visco, Haematologica 2013 98:255)

[Result of BCL-6 FISH analysis]

Method: FISH analysis was performed on formalin-fixed, paraffin-embedded tissue using Vysis LSI BCL6 dual color, break apart probes (Abbott Molecular).

BCL-6´Â ¿°»öü 3q27¿¡ À§Ä¡Çϸç diffuse large B-cell lymphomaÀÇ 25%, Nodular lymphocyte predominant Hodgkin lymphomaÀÇ 50%¿¡¼­ translocationÀÌ ÀÖ´Ù°í ¾Ë·ÁÁ® ÀÖ½À´Ï´Ù. BCL-6 translocationÀÇ partner geneÀº Àý¹ÝÀÌ IgH µîÀÇ immunoglobulin geneÀÌ°í ³ª¸ÓÁö´Â ´Ù¾çÇÑ non-Ig geneÀÔ´Ï´Ù. BCL6¿Í C-MYC¿¡ ¸ðµÎ translocationÀÌ ÀÖ´Â °æ¿ì ¡®double hit lymphoma¡¯¶ó°í Çϸç ÈξÀ ³ª»Û ¿¹Èĸ¦ º¸ÀÔ´Ï´Ù. ÀÌ °Ë»ç´Â BCL-6ÀÇ translocation ¿©ºÎ¸¸ È®ÀÎÇϹǷÎ, BCL-6ÀÇ fusion partner geneÀÌ ¾î¶² °ÍÀÎÁö´Â ¾Ë ¼ö ¾ø½À´Ï´Ù. (Pillai, Am J Surg Pathol 2013 37:323; Wagner, Brit J Hematol 2010 152:3)



© ÀÏ¿ø³»½Ã°æ±³½Ç ¹Ù¸¥³»½Ã°æ¿¬±¸¼Ò ÀÌÁØÇà. EndoTODAY Endoscopy Learning Center. Lee Jun Haeng.