JAK Inhibitor-Induced Improvement of IgA Nephropathy in a Patient With Polycythemia Vera: A Case Report.

Mayumi Takahashi-Kobayashi, Hidekazu Nishikii, Tatsuya Shimizu, Yoko Kaneko, Mamiko Sakata-Yanagimoto, Joichi Usui

Abstract readCase Reports

In one paragraph

Article in Kidney medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

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0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Mayumi Takahashi-KobayashiDepartment of Nephrology, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.

Hidekazu NishikiiDepartment of Hematology, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.

Tatsuya ShimizuDepartment of Nephrology, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.

Yoko KanekoDepartment of Nephrology, Tsukuba Central Hospital, Ushiku, Ibaraki, Japan.

Mamiko Sakata-YanagimotoDepartment of Hematology, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.

Joichi UsuiDepartment of Nephrology, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Polycythemia vera (PV) is a myeloproliferative neoplasm characterized by the clonal expansion of hematopoietic stem cells, commonly caused by pathogenic variants in Janus kinase 2 (JAK2). Although PV primarily affects the hematologic system, various renal manifestations have been reported, including rare cases of glomerulopathies. We describe a 73-year-old woman with PV harboring a

Indexed as

Case reportIgANIgA nephropathyJAKiJAK inhibitorspolycythemia veraPV

Identifiers

PMID42211688

DOI10.1016/j.xkme.2026.101376

PMCPMC13213300

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