Epstein-Barr virus (EBV)-positive diffuse large B-cell lymphoma of the elderly was included as a provisional entity in the 2008 WHO lymphoma classification. Most reports of this disease come from Asia and little is known about it in other regions of the world, including Latin America. Therefore, in this study, 305 diffuse large B-cell lymphomas in patients above 50 years were analyzed, 136 from Mexico and 169 from Germany. EBV was detected by Epstein-Barr early RNA (EBER) in situ hybridization. Only cases with EBER þ in the majority of tumor cells were regarded as EBV þ diffuse large B-cell lymphoma. The prevalence of EBV þ diffuse large B-cell lymphoma in Mexican patients was found to be 7% (9 of 136), whereas only 2% (4 of 169) of the German cases were positive. The median age at diagnosis was 66 years in the Mexican cohort, as opposed to 77 years in the German group. The site of presentation was in both groups predominantly nodal in nine cases (70%) and extranodal in four cases (30%). Of the 13 EBV þ cases, 10 (77%) were classified as polymorphic and 3 (23%) as monomorphic type. The polymorphic cases showed a non-germinal center B-cell immunophenotype (CD10À MUM1 þ ). Twelve cases (92%) were LMP1 positive and two (15%) expressed EBNA2. An interesting finding was the high frequency of EBV type B with the LMP1 30 bp deletion found in the Mexican cases (50%). Eight of the 11 evaluable cases were B-cell monoclonal by polymerase chain reaction. In summary, we found a similar prevalence of EBV þ diffuse large B-cell lymphoma of the elderly in a Mexican population compared with what has been reported in Asian countries, and in contrast to the low frequency in Western populations (1-3%). However, compared with the Asian series, the Mexican patients were younger at diagnosis, presented predominantly with nodal disease and rarely expressed EBNA2 protein.Modern Pathology (2011Pathology ( ) 24, 1046Pathology ( -1054 doi:10.1038/modpathol.2011 published online 15 April 2011 Keywords: EBV; elderly; large cell lymphoma; Mexico Epstein-Barr virus (EBV) is a ubiquitous herpesvirus that infects 490% of the human population establishing persistent latent infection in the host. 1Although EBV infection is benign in most individuals, it has been linked to the etiology of a rather broad spectrum of B-cell lymphoproliferations both

Angioimmunoblastic T-cell lymphoma (AITL) is frequently associated with skin lesions, but epidermotropic cutaneous involvement has never been described. A 37-year-old man presented with erythematous and pruriginous plaques, clinically suggestive of mycosis fungoides, distributed all over the body, 3 weeks after the last line of a polychemotherapy, given for an AITL diagnosed 1 year earlier on a lymph node biopsy. Skin biopsy showed an epidermotropic CD4(+) T-cell lymphoma, so that a diagnosis of mycosis fungoides was first proposed. Further investigations showed that atypical lymphocytes strongly expressed CD10 and markers of follicular helper T cells (T(FH) ) including PD1, BCL-6 and CXCL13. The diagnosis of an unusual epidermotropic cutaneous localization of the AITL was finally made, supported by the presence of the same T-cell clone in the initial lymph node biopsy and the skin. We therefore recommend performing markers of T(FH) cells in patients with unusual epidermotropic cutaneous T-cell lymphomas, particularly if they have any clinical features suggestive of AITL.

Background: COVID-19 poses a significantly more serious threat to adults aged 65 and above, with a higher mortality rate. This study aims to describe the outcome of COVID-19 patients in the elderly and very elderly population admitted to a tertiary care Portuguese hospital. The authors defined the elderly population (65 to 79 years) and the very elderly population (≥ 80 years).Methods: We conducted a retrospective observational single center study in the internal medicine ward of a tertiary hospital from November 1, 2020 to January 31, 2021. All COVID-19 patients aged over 65 years were enrolled.Results: Of the 824 patients with SARS-CoV-2 infection, 586 (71%) were aged above 65 years. Of them, 61.7% were very elderly and 32.9% were elderly. The hospital recorded 53 (27.5%) deaths in the elderly group and 182 (46.3%) in the over-80 group. In the elderly population, only 32 patients had critical illness compared to the 79 in the very elderly group. In addition to respiratory complications, acute kidney failure and liver dysfunction were noted. In both groups, mortality was higher when there was acute kidney injury (AKI). With respect to treatment, dexamethasone and azithromycin did not show a statistically significant difference between the groups. The need for oxygen therapy over 4L/min, high-flow therapy, and mechanical invasive ventilation was related to higher mortality in both groups. Conclusion:The very elderly group had a higher number of deaths compared to the elderly group due to multiple comorbidities. Respiratory failure was the most frequently occurring complication. Surprisingly, dexamethasone and azithromycin therapy did not show a statistically significant effect in both age groups despite their current widespread usage in COVID-19 treatment worldwide.