Abstract / Summary
Background/Objectives: Primary plasma cell leukemia (pPCL) is a rare and highly aggressive plasma cell malignancy with poor prognosis and limited therapeutic options. This study aimed to characterize global publication and citation trends, leading contributors, and collaboration patterns in pPCL research. Methods: Scopus was searched on 8 September 2026 using a phrase-restricted TITLE-ABS-KEY query for the disease name and orthographic variants. English-language records classified as “Article” and published from 1961 through 2026 were eligible. All retrieved records underwent author-led relevance screening and duplicate assessment. Analyses were performed using bibliometrix through the Biblioshiny interface. Results: Of 219 records retrieved, nine were excluded because pPCL was mentioned only incidentally or pPCL-specific findings were not separately identifiable; 210 articles published between 1983 and 2026 were included. The articles appeared in 110 sources and involved 1681 authors. The annual publication growth was 5.95%, although 2026 was incomplete, and the mean citation count per article was 30.02. Acta Haematologica was the most productive journal (n = 10), followed by Blood (n = 9) and the Indian Journal of Hematology and Blood Transfusion (n = 8). Among 152 articles with corresponding-author country data, China, the United States, and India contributed the most articles, whereas France, the United States, and Spain had the highest total citation counts. International co-authorship accounted for 10.95% of articles, and the author network contained five collaboration clusters. Conclusions: This analysis maps the development of pPCL research and identifies its principal publication sources and contributors. The limited proportion of internationally co-authored articles supports broader multicenter and international collaboration in this rare disease.