RESUMEN
'Multifocal bone lymphoma' or 'polyostotic lymphoma' is a neoplasm with exclusive multifocal involvement of the skeleton, without affecting lymph nodes or other soft tissues. Knowledge on this uncommon condition is limited because the related literature is sparse and fragmentary. We reviewed cases of multifocal bone diffuse large B-cell lymphoma (MB-DLBCL) registered in a clinico-pathological database of the International Extranodal Lymphoma Study Group that includes 499 cases of bone lymphoma. Clinical features, management and prognosis of 37 MB-DLBCL patients and 63 'controls' (stage-IV DLBCL and skeletal involvement) were analysed. Presentation and treatment of MB-DLBCL and controls were identical. At a median follow-up of 52 months (10-189), MB-DLBCL patients exhibited a significantly better response rate (92% vs. 65%; P = 0·002), progression-free survival (5-year: 56 ± 9% vs. 34 ± 6%; P = 0·003) and overall survival (5-year: 74 ± 8% vs. 36 ± 7%; P = 0·002). Among MB-DLBCL patients, the use of post-chemo radiotherapy was associated with better overall survival (5-year: 83 ± 12% vs. 55 ± 16%; P = 0·003). Two MB-DLBCL patients (5·4%) with spine and skull involvement experienced central nervous system (CNS) relapse. Thus, MB-DLBCL patients exhibit a significantly better prognosis compared to patients with advanced-stage DLBCL, and should be treated with conventional anthracycline-based chemotherapy, keeping intensified treatment for relapsing cases, considering involved-field radiotherapy, and CNS prophylaxis in high-risk patients.
Asunto(s)
Neoplasias Óseas/patología , Neoplasias Óseas/terapia , Linfoma de Células B Grandes Difuso/patología , Linfoma de Células B Grandes Difuso/terapia , Adolescente , Adulto , Anciano , Neoplasias Óseas/tratamiento farmacológico , Neoplasias Óseas/radioterapia , Estudios de Casos y Controles , Supervivencia sin Enfermedad , Femenino , Humanos , Linfoma de Células B Grandes Difuso/tratamiento farmacológico , Linfoma de Células B Grandes Difuso/radioterapia , Masculino , Persona de Mediana Edad , Pronóstico , Estudios Retrospectivos , Resultado del Tratamiento , Adulto JovenRESUMEN
The cytotoxicity of the brown alga Sargassum siliquastrum on human cancer cells (AGS, HT-29, HT-1080, and MCF-7) was investigated. Bioassay-guided fractionation of the crude extracts showed that the 85% aq. methanol (MeOH) fraction was the most toxic. Seven known meroterpenoids (1-7) were isolated from this cytotoxic fraction. Each compound was evaluated for its cytotoxic effect on human cancer cells. Compounds 1, 2, and 4 showed strong cytotoxicity against AGS, HT-29, and HT-1080 cell lines, with IC50 values ranging from 0.5 to 5.7 microg/mL.