1. In this issue

   News 01 May 2021 Pages: 825 - 826

2. PD-L1 immunohistochemistry in non-small-cell lung cancer: unraveling differences in staining concordance and interpretation

   • Cleo Keppens
   • Elisabeth MC Dequeker
   • Jan H von der Thüsen

   Original Article Open access 04 December 2020 Pages: 827 - 839

   

3. Myopericytoma arising from myopericytosis—a hitherto unrecognized entity within the lung

   • Ulrike Gruber-Moesenbacher
   • Alicia Morresi- Hauff
   • Helmut Popper

   Original Article Open access 26 November 2020 Pages: 841 - 849

   

4. 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 Velasco
   • Fatma Tokat
   • Xavier Matias-Guiu

   Original Article Open access 10 November 2020 Pages: 851 - 863

5. Periostin as a key molecule defining desmoplastic environment in colorectal cancer

   • Takahiro Sueyama
   • Yoshiki Kajiwara
   • Hideki Ueno

   Original Article 19 November 2020 Pages: 865 - 874

   

6. T2 gallbladder cancer shows substantial survival variation between continents and this is not due to histopathologic criteria or pathologic sampling differences

   • Mia S. DeSimone
   • Michael Goodman
   • Volkan Adsay

   Original Article 07 January 2021 Pages: 875 - 884

   

7. Histological classification of mucinous ovarian tumors: inter-observer reproducibility, clinical relevance, and role of genetic biomarkers

   • Catherine Genestie
   • Aurélie Auguste
   • Mojgan Devouassoux-Shisheboran

   Original Article 03 October 2020 Pages: 885 - 891

   

8. Uterine leiomyosarcomas with osteoclast-like giant cells associated with high expression of RUNX2 and RANKL

   • Mika Terasaki
   • Yasuhiro Terasaki
   • Akira Shimizu

   Original Article 06 January 2021 Pages: 893 - 904

   

9. Temporal heterogeneity of placental segmental fetal vascular malperfusion: timing but not etiopathogenesis

   • Jerzy Stanek

   Original Article 12 September 2020 Pages: 905 - 914

   

10. EGFR and BRAF mutations in inverted sinonasal papilloma — a more complex landscape?

    • Sarah Zonnur
    • Andreas Erbersdobler
    • Björn Schneider

    Original Article Open access 13 October 2020 Pages: 915 - 924

    

11. Stromal categorization in early oral tongue cancer

    • Alhadi Almangush
    • Ibrahim O. Bello
    • Ilmo Leivo

    Original Article Open access 21 September 2020 Pages: 925 - 932

    

12. ALK alterations in salivary gland carcinomas

    • Hanna Majewska
    • Adam Gorczyński
    • Wojciech Biernat

    Original Article Open access 25 November 2020 Pages: 933 - 941

    

13. Identification of immune-related genes with prognostic significance in the microenvironment of cutaneous melanoma

    • Yan Qu
    • Shuqing Zhang
    • Fengjuan Wang

    Original Article 12 November 2020 Pages: 943 - 959

    

14. Role of chromatin assembly factor-1/p60 and poly [ADP-ribose] polymerase 1 in mycosis fungoides

    • Massimo Mascolo
    • Antonio Travaglino
    • Stefania Staibano

    Original Article Open access 24 October 2020 Pages: 961 - 968

    

15. Nodal EBV-positive polymorphic B cell lymphoproliferative disorder with plasma cell differentiation: clinicopathological analysis of five cases

    • Akira Satou
    • Tetsuya Tabata
    • Shigeo Nakamura

    Original Article 09 November 2020 Pages: 969 - 976

    

16. Primary glomus tumour of the pituitary gland: diagnostic challenges of a rare and potentially aggressive neoplasm

    • Boon Leong Quah
    • Carmine Antonio Donofrio
    • Konstantina Karabatsou

    Original Article Open access 12 September 2020 Pages: 977 - 984

    

17. The impact of pre-analytical parameters on class II biomarkers by immunohistochemistry: concordance across four tissue processing protocols

    • Bin Xu
    • Samira Alminawi
    • Elzbieta Slodkowska

    Original Article 11 November 2020 Pages: 985 - 993

    

18. Causes behind error rates for predictive biomarker testing: the utility of sending post-EQA surveys

    • Cleo Keppens
    • Ed Schuuring
    • Elisabeth M. C. Dequeker

    Original Article Open access 23 November 2020 Pages: 995 - 1006

19. NUT midline carcinomas and their differentials by a single molecular profiling method: a new promising diagnostic strategy illustrated by a case report

    • Simon Haefliger
    • Alexandar Tzankov
    • Juergen Hench

    Brief Report Open access 25 June 2020 Pages: 1007 - 1012

    

20. Lipoblastoma-like tumor of the spermatic cord: case report and review of the literature

    • Marco Gambarotti
    • Kivilcim E. Erdogan
    • Angelo P. Dei Tos

    Brief Report 02 July 2020 Pages: 1013 - 1017

    

21. Myxoid mesenchymal intraventricular brain tumour with EWSR1–CREB1 gene fusion in an adult woman

    • Pedro Valente Aguiar
    • Jorge Pinheiro
    • Paulo Linhares

    Brief Report 06 July 2020 Pages: 1019 - 1024

    

22. Ocular PEComas are frequently melanotic and TFE3-translocated: report of two cases including the first description of PRCC-TFE3 fusion in PEComa

    • Y. Gao
    • G. Chen
    • Wah Cheuk

    Brief Report 16 July 2020 Pages: 1025 - 1031

    

23. Triumphs and tribulations of COVID-19 vaccines: Lessons to be learned from smallpox epidemics in the 1700s

    • Ambrogio Fassina
    • Matteo Fassan
    • Luisa Barzon

    Commentary 12 January 2021 Pages: 1033 - 1035