{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T04:18:35Z","timestamp":1790050715811,"version":"4.0.1"},"reference-count":38,"publisher":"Scientific Scholar","content-domain":{"domain":["cytojournal.com"],"crossmark-restriction":true},"short-container-title":["Cytojournal"],"abstract":"<jats:p>Cell-blocks are an important component for evaluation for hematolymphoid lesions. They are especially critical for immunocharacterization of the lymphoid population especially when flow cytometry is not available or cannot be performed. In addition, cell-blocks allow various molecular pathology tests including gene rearrangement studies and FISH, proteomics analysis, and microbiology\/histochemical special stains. Fine-needle aspiration (FNA) for mass lesions, lymphadenopathy, and effusion fluids are common cytopathology specimens which are frequently cell-blocked. The differential diagnosis of enlarged lymph nodes (LNs) and mass lesions is broad and includes reactive processes, granulomatous lesions and malignancies including solid tumor metastases and various types of hematological malignancies, of which lymphoma would be most common. Depending on the patient population, most lymphomas may be diagnosed with immunocharacterization on cell-block or\/and flow cytometry in concert with excellent cytomorphology in Diff-Quik stained FNA aspirate smears. However, a proportion of lymphoma cases (up to 12-30%) may still require an excisional LN biopsy to evaluate architectural parameters. Similarly, various effusion fluids suspicious for lymphoma can be immunocharacterized by immunostaining of cell-block sections (or\/and by flow cytometry). Availability of quantitatively and qualitatively optimum cell-blocks of specimens to be evaluated for hematolymphoid processes is critical for immunohistochemistry, polymerase chain reaction,<jats:italic>in situ<\/jats:italic>hybridization (FISH), and gene expression profiling studies.<\/jats:p>","DOI":"10.25259\/cytojournal_10_2021","type":"journal-article","created":{"date-parts":[[2021,3,31]],"date-time":"2021-03-31T08:52:21Z","timestamp":1617180741000},"page":"7","update-policy":"https:\/\/doi.org\/10.25259\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Cell-blocks and hematolymphoid lesions"],"prefix":"10.25259","volume":"18","author":[{"given":"Ahmed","family":"Alrajjal","sequence":"first","affiliation":[{"name":"Department of Pathology, Wayne State University School of Medicine, Karmanos Cancer Center, Detroit, Michigan, United 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