ArticleCureus2026
Synchronous Extensive-Stage Small Cell Lung Cancer and Multiple Myeloma Detected by Marked Hypergammaglobulinemia.
Article in Cureus, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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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.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
A 75-year-old woman presented with nausea, exertional dyspnea, and right-sided chest pain. Chest imaging showed a right hilar mass with right pleural effusion. Initial assessment favored primary lung cancer with carcinomatous pleuritis. However, laboratory tests at admission revealed markedly elevated levels of total protein with hypoalbuminemia, resulting from monoclonal IgG-kappa (κ) gammopathy (IgG: 7,700 mg/dL). Thoracentesis demonstrated an exudative effusion; pleural fluid cytology and transbronchial tumor biopsy confirmed small cell lung cancer (SCLC). Anemia, markedly increased serum free κ light chain levels, and atypical plasmacytosis in the bone marrow confirmed the presence of multiple myeloma. She was then diagnosed with extensive-stage SCLC and concomitant multiple myeloma. Dose-reduced carboplatin plus etoposide was initiated for SCLC with clinical improvement and no severe acute toxicity; treatment for myeloma was planned after stabilization of SCLC. This case highlights that extreme hypergammaglobulinemia in a patient with suspected lung cancer should trigger prompt evaluation for multiple myeloma. Dual malignancy can coexist and may be overlooked if clinicians focus on a single diagnosis.
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