Table 4

Immunohistochemical Results, Background Lymphocytes

Marker

Thymoma Type


A

AB

B1

B2

B3

MNT


CD57

S

S

S

S

S

S

CD3

S

+

+

+

+

+

CD5

S

+

+

+

+

+

CD20

-

+

+

-/+

-/+

+*

CD1a

-

+

+

+

+

+

CD99

-

+

+

+

+

+

Ki67/MIB1

<10%

>80%

>80%

>80%

>80%

>80%


MNT = multinodular thymoma

-/+ = variably (large numbers of intratumoral CD20+ lymphocytes in type B2 (n = 1) and type B3 (n = 3) thymomas associated with autoimmune disorder)

* = numerous large stromal CD20+ lymphoid aggregates

S = single cells

Alexiev et al. Diagnostic Pathology 2007 2:13   doi:10.1186/1746-1596-2-13

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