PURPOSE: Mantle-cell lymphoma (MCL) is a rather aggressive B-cell malignancy whose considerable variability of individual outcome is associated with clinical characteristics (Mantle Cell Lymphoma International Prognostic Index [MIPI]). The Ki-67 index is a strong independent prognostic factor; however, the biologic MIPI (MIPI-b) distinguishes only two groups, which does not appropriately depict the clinical heterogeneity. By using the cohort from the European MCL Younger and MCL Elderly trials, we aimed to evaluate the additional prognostic impact of cytology and growth pattern and to improve risk stratification with the Ki-67 index and MIPI. PATIENTS AND METHODS: Diagnostic tumor biopsies were reviewed by the European Mantle Cell Lymphoma Pathology Panel to determine Ki-67 index by using published guidelines, cytology, and growth pattern. We evaluated prognostic effects for overall survival (OS) by Cox regression. For the cohort used for MIPI-b development (German Low-Grade Lymphoma Study Group [GLSG] 1996 and GLSG2000), we checked whether the equally weighted combination of Ki-67 index (dichotomized at the validated 30% cutoff) and MIPI risk groups was adequate and compared the prognostic power of this modified combination to MIPI and MIPI-b for the MCL Younger/MCL Elderly cohort. RESULTS: The Ki-67 index was assessed in 508 of 832 patients (median age, 62 years). Blastoid cytology was associated with inferior OS independently of MIPI but not independently of the Ki-67 index. Growth pattern was not independently prognostic. The modified combination of the Ki-67 index and MIPI separated four groups with 5-year OS: 85%, 72%, 43%, and 17% (P < .001) and was more discriminative than MIPI and MIPI-b. CONCLUSION: Using the Ki-67 index is superior to using cytology and growth pattern as prognostic factors in MCL. The modified combination of the Ki-67 index and MIPI showed a refined risk stratification, reflecting their strong complementary prognostic effects while integrating the most relevant prognostic factors available in clinical routine.

• MeSH
• antigen Ki-67 analýza   MeSH
• biopsie MeSH
• časové faktory MeSH
• diskriminační analýza MeSH
• dospělí MeSH
• hodnocení rizik MeSH
• imunohistochemie * MeSH
• Kaplanův-Meierův odhad MeSH
• lidé středního věku MeSH
• lidé MeSH
• lymfom z plášťových buněk chemie   mortalita   patologie   terapie   MeSH
• multivariační analýza MeSH
• prediktivní hodnota testů MeSH
• prognóza MeSH
• proliferace buněk * MeSH
• proporcionální rizikové modely MeSH
• randomizované kontrolované studie jako téma MeSH
• retrospektivní studie MeSH
• rizikové faktory MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• tumor burden MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• webové vysílání MeSH
• Geografické názvy
• Evropa MeSH

PURPOSE: Mantle-cell lymphoma (MCL) is a distinct B-cell lymphoma associated with poor outcome. In 2008, the MCL International Prognostic Index (MIPI) was developed as the first prognostic stratification tool specifically directed to patients with MCL. External validation was planned to be performed on the cohort of the two recently completed randomized trials of the European MCL Network. PATIENTS AND METHODS: Data of 958 patients with MCL (median age, 65 years; range, 32 to 87 years) treated upfront in the trials MCL Younger or MCL Elderly were pooled to assess the prognostic value of MIPI with respect to overall survival (OS) and time to treatment failure (TTF). RESULTS: Five-year OS rates in MIPI low, intermediate, and high-risk groups were 83%, 63%, and 34%, respectively. The hazard ratios for OS of intermediate versus low and high versus intermediate risk patients were 2.1 (95% CI, 1.5 to 2.9) and 2.6 (2.0 to 3.3), respectively. MIPI was similarly prognostic for TTF. All four clinical baseline characteristics constituting the MIPI, age, performance status, lactate dehydrogenase level, and WBC count, were confirmed as independent prognostic factors for OS and TTF. The validity of MIPI was independent of trial cohort and treatment strategy. CONCLUSION: MIPI was prospectively validated in a large MCL patient cohort homogenously treated according to recognized standards. As reflected in current guidelines, MIPI represents a generally applicable prognostic tool to be used in research as well as in clinical routine, and it can help to develop risk-adapted treatment strategies to further improve clinical outcome in MCL.

• MeSH
• chemoradioterapie MeSH
• cisplatina aplikace a dávkování   MeSH
• cyklofosfamid aplikace a dávkování   MeSH
• cytarabin aplikace a dávkování   MeSH
• dexamethason aplikace a dávkování   MeSH
• dospělí MeSH
• doxorubicin aplikace a dávkování   MeSH
• kohortové studie MeSH
• lidé středního věku MeSH
• lidé MeSH
• lymfom z plášťových buněk diagnóza   patologie   terapie   MeSH
• multicentrické studie jako téma MeSH
• myší monoklonální protilátky aplikace a dávkování   MeSH
• prednison aplikace a dávkování   MeSH
• prognóza MeSH
• proporcionální rizikové modely MeSH
• protokoly antitumorózní kombinované chemoterapie aplikace a dávkování   terapeutické užití   MeSH
• randomizované kontrolované studie jako téma metody   MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• staging nádorů MeSH
• transplantace periferních kmenových buněk metody   MeSH
• vinkristin aplikace a dávkování   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH