PD-L1 immunohistochemistry in non-small-cell lung cancer: unraveling differences in staining concordance and interpretation Cleo KeppensElisabeth MC DequekerJan H von der Thüsen Original Article Open access 04 December 2020 Pages: 827 - 839
Myopericytoma arising from myopericytosis—a hitherto unrecognized entity within the lung Ulrike Gruber-MoesenbacherAlicia Morresi- HauffHelmut Popper Original Article Open access 26 November 2020 Pages: 841 - 849
Multi-center real-world comparison of the fully automated Idylla™ microsatellite instability assay with routine molecular methods and immunohistochemistry on formalin-fixed paraffin-embedded tissue of colorectal cancer Ana VelascoFatma TokatXavier Matias-Guiu Original Article Open access 10 November 2020 Pages: 851 - 863
Periostin as a key molecule defining desmoplastic environment in colorectal cancer Takahiro SueyamaYoshiki KajiwaraHideki Ueno Original Article 19 November 2020 Pages: 865 - 874
T2 gallbladder cancer shows substantial survival variation between continents and this is not due to histopathologic criteria or pathologic sampling differences Mia S. DeSimoneMichael GoodmanVolkan Adsay Original Article 07 January 2021 Pages: 875 - 884
Histological classification of mucinous ovarian tumors: inter-observer reproducibility, clinical relevance, and role of genetic biomarkers Catherine GenestieAurélie AugusteMojgan Devouassoux-Shisheboran Original Article 03 October 2020 Pages: 885 - 891
Uterine leiomyosarcomas with osteoclast-like giant cells associated with high expression of RUNX2 and RANKL Mika TerasakiYasuhiro TerasakiAkira Shimizu Original Article 06 January 2021 Pages: 893 - 904
Temporal heterogeneity of placental segmental fetal vascular malperfusion: timing but not etiopathogenesis Jerzy Stanek Original Article 12 September 2020 Pages: 905 - 914
EGFR and BRAF mutations in inverted sinonasal papilloma — a more complex landscape? Sarah ZonnurAndreas ErbersdoblerBjörn Schneider Original Article Open access 13 October 2020 Pages: 915 - 924
Stromal categorization in early oral tongue cancer Alhadi AlmangushIbrahim O. BelloIlmo Leivo Original Article Open access 21 September 2020 Pages: 925 - 932
ALK alterations in salivary gland carcinomas Hanna MajewskaAdam GorczyńskiWojciech Biernat Original Article Open access 25 November 2020 Pages: 933 - 941
Identification of immune-related genes with prognostic significance in the microenvironment of cutaneous melanoma Yan QuShuqing ZhangFengjuan Wang Original Article 12 November 2020 Pages: 943 - 959
Role of chromatin assembly factor-1/p60 and poly [ADP-ribose] polymerase 1 in mycosis fungoides Massimo MascoloAntonio TravaglinoStefania Staibano Original Article Open access 24 October 2020 Pages: 961 - 968
Nodal EBV-positive polymorphic B cell lymphoproliferative disorder with plasma cell differentiation: clinicopathological analysis of five cases Akira SatouTetsuya TabataShigeo Nakamura Original Article 09 November 2020 Pages: 969 - 976
Primary glomus tumour of the pituitary gland: diagnostic challenges of a rare and potentially aggressive neoplasm Boon Leong QuahCarmine Antonio DonofrioKonstantina Karabatsou Original Article Open access 12 September 2020 Pages: 977 - 984
The impact of pre-analytical parameters on class II biomarkers by immunohistochemistry: concordance across four tissue processing protocols Bin XuSamira AlminawiElzbieta Slodkowska Original Article 11 November 2020 Pages: 985 - 993
Causes behind error rates for predictive biomarker testing: the utility of sending post-EQA surveys Cleo KeppensEd SchuuringElisabeth M. C. Dequeker Original Article Open access 23 November 2020 Pages: 995 - 1006
NUT midline carcinomas and their differentials by a single molecular profiling method: a new promising diagnostic strategy illustrated by a case report Simon HaefligerAlexandar TzankovJuergen Hench Brief Report Open access 25 June 2020 Pages: 1007 - 1012
Lipoblastoma-like tumor of the spermatic cord: case report and review of the literature Marco GambarottiKivilcim E. ErdoganAngelo P. Dei Tos Brief Report 02 July 2020 Pages: 1013 - 1017
Myxoid mesenchymal intraventricular brain tumour with EWSR1–CREB1 gene fusion in an adult woman Pedro Valente AguiarJorge PinheiroPaulo Linhares Brief Report 06 July 2020 Pages: 1019 - 1024
Ocular PEComas are frequently melanotic and TFE3-translocated: report of two cases including the first description of PRCC-TFE3 fusion in PEComa Y. GaoG. ChenWah Cheuk Brief Report 16 July 2020 Pages: 1025 - 1031
Triumphs and tribulations of COVID-19 vaccines: Lessons to be learned from smallpox epidemics in the 1700s Ambrogio FassinaMatteo FassanLuisa Barzon Commentary 12 January 2021 Pages: 1033 - 1035