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Table 1 Patient characteristics (N = 27)

From: Impact of radiation dose on local control and survival in extramedullary head and neck plasmacytoma

Characteristic Value Percentage/range
Mean age at EMP Dx, y 56 y 42–86
Gender ratio 18 M: 9 F  
Type of EMP
 Primary 15/27 56%
 Secondary 12/27 44%
Involved lymph nodes
 Yes 7/27 26%
 No 20/27 74%
Bone infiltration/erosion
 Yes 13/27 26%
 No 20/27 74%
Immunohistochemical analysis
 Kappa light chain restriction 11/27 41%
 Lambda light chain restriction 9/27 33%
 unknown 7/27 26%
Serum Beta-2-microglobulin
 Elevated 5/27 18%
 Normal 7/27 26%
 Unknown 15/27 56%
Serum protein
 Elevated 3/27 11%
 Normal 17/27 63%
 Low 3/27 11%
 Unknown 4/27 15%
Serum protein immunofixation
 Positive 14/27 52%
 Negative 9/27 33%
 Unknown 4/27 15%
Serum LDH
 Elevated 12/27 44%
 Normal 11/27 41%
 Unknown 4/27 15%
Serum calcium
 Elevated 1/27 4%
 Normal 21/27 78%
 Low 2/27 7%
 Unknown 3/27 11%
Prior or adjuvant therapies
 HSCT 12/27 44%
 TBI 3/27 11%
 Systemic immunochemotherapy 14/27 52%
  1. F female, M male, Med. median, LDH lactate dehydrogenase, HSCT Hematopoietic stem cell transplantation, TBI total body irradiation