Table 1

ALK expression in anaplastic large cell lymphoma (ALCL) according to site of origin

Pattern of staining
NALK expressionc/ncn
ALK expression was determined by immunohistochemistry using the monoclonal antibodies ALK1 and ALKc.
c/n, cytoplasmic and nuclear staining; c, cytoplasmic staining only; n, nuclear staining only; LPD, lymphoproliferative diseases.
Systemic (nodal) ALCL51201550
Primary gastrointestinal ALCL14 0
Primary nasal ALCL 5 0
Cutaneous CD30+ LPD
Primary cutaneous ALCL15 0
Lymphomatoid papulosis 7 0