Histopathology, cell proliferation indices and clinical outcome in 304 patients with mantle cell lymphoma (MCL): a clinicopathological study from the European MCL Network.

Abstract:

:Mantle cell lymphoma (MCL) is a distinct lymphoma subtype with a particularly poor clinical outcome. The clinical relevance of the morphological characteristics of these tumours remains uncertain. The European MCL Network reviewed 304 cases of MCL to determine the prognostic significance of histopathological characteristics. Cytomorphological subtypes, growth pattern and markers of proliferation (mitotic and Ki-67 indices) were analysed. In addition to the known cytological subtypes, classical (87.5%), small cell (3.6%), pleomorphic (5.9%) and blastic (2.6%), we identified new pleomorphic subgroups with mixtures of cells (classical + pleomorphic type; 1.6%) or transitions (classical/pleomorphic type; 1.6%), which, however, did not differ significantly in overall survival time. Exactly 80.5% of cases displayed a diffuse growth pattern, whereas 19.5% of cases had a nodular growth pattern, which was associated with a slightly more favourable prognosis. A high proliferation rate (mitotic or Ki-67 indices) was associated with shorter overall survival. Cut-off levels were defined that allowed three subgroups with different proliferation rates to be discriminated, which showed significantly different clinical outcomes (P < 0.0001). Based on this large clinicopathological study of prospective clinical trials, multivariate analysis confirmed the central prognostic role of cell proliferation and its superiority to all other histomorphological and clinical criteria.

journal_name

Br J Haematol

authors

Tiemann M,Schrader C,Klapper W,Dreyling MH,Campo E,Norton A,Berger F,Kluin P,Ott G,Pileri S,Pedrinis E,Feller AC,Merz H,Janssen D,Hansmann ML,Krieken H,Möller P,Stein H,Unterhalt M,Hiddemann W,Parwaresch R,Europ

doi

10.1111/j.1365-2141.2005.05716.x

subject

Has Abstract

pub_date

2005-10-01 00:00:00

pages

29-38

issue

1

eissn

0007-1048

issn

1365-2141

pii

BJH5716

journal_volume

131

pub_type

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