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Related Experiment Videos

Basic isoferritin and hypercalcaemia in renal cell carcinoma

G J Mufti, T J Hamblin, J Stevens

    Journal of Clinical Pathology
    |September 1, 1982
    PubMed
    Summary

    A patient with renal cell carcinoma had high serum ferritin levels despite iron deficiency anemia. Tumor removal normalized both ferritin and calcium levels, suggesting the cancer secreted these substances.

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    Area of Science:

    • Oncology
    • Nephrology
    • Biochemistry

    Background:

    • Renal cell carcinoma (RCC) can present with paraneoplastic syndromes.
    • Hypercalcemia is a known paraneoplastic manifestation of RCC.
    • Elevated serum ferritin, typically an indicator of iron stores, can be altered in malignancy.

    Observation:

    • A 63-year-old male patient presented with iron deficiency anemia and hypercalcemia.
    • A renal cell carcinoma was diagnosed.
    • Despite an iron-deficient state, serum ferritin concentration was significantly elevated, primarily due to a "basic isoferritin" subtype.

    Findings:

    • Serum parathormone levels were normal, ruling out primary hyperparathyroidism.
    • Following surgical removal of the renal cell carcinoma, both serum ferritin and calcium levels returned to normal.
    • This suggests the tumor cells were responsible for the abnormal ferritin and calcium levels.

    Implications:

    • Renal cell carcinoma can secrete "basic isoferritin" and factors causing hypercalcemia.
    • This case highlights the potential for specific tumor markers to be dysregulated in paraneoplastic syndromes.
    • Understanding these paraneoplastic mechanisms may aid in diagnosis and monitoring of renal cell carcinoma.

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