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Table 2 Pathologic Diagnosis and Thymoma Pathologic Staging*

From: Thymomas: a cytological and immunohistochemical study, with emphasis on lymphoid and neuroendocrine markers

Thymoma type Stage I Stage IIa Stage IIb Stage III Stage IVa
A (n = 2) 1 1 - - -
AB (n = 3) 1 2 - - -
B1 (n = 4) 1 2 1 - -
B2 (n = 1) - 1 - - -
B3 (n = 6) 2 2 - 1 1
MNT (n = 1) 1 - - - -
  1. * = references 12 and 15
  2. MNT = micronodular thymoma