Abstract
Peripheral T cell lymphoma, not otherwise specified (PTCL-NOS), is a heterogeneous disease with respect to clinicopathological features. Cell adhesion molecule 1 (CADM1) has been reported to be ectopically expressed in adult T cell leukaemia/lymphoma (ATLL). However, the frequency of CADM1 expression remains unknown in peripheral T cell lymphomas. In the current study, CADM1 expression was analysed in 88 PTCL-NOS patients. CADM1 was expressed in 14 of 88 (15.9%) PTCL-NOS cases, and its expression was associated with C-C chemokine receptor type 4 (CCR4) expression and nuclear atypia. CADM1-positive PTCL-NOS cases (10/74) had a significantly poorer prognosis than CADM1-negative cases (64/74) (P=0.001). Multivariate analysis confirmed that CADM1 expression was an independent prognostic factor in PTCL-NOS. These findings suggest that CADM1 expression is a novel prognostic factor for PTCL-NOS.
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