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Related Experiment Videos

Calcification in retinoblastoma

J D Bullock, R J Campbell, R R Waller

    Investigative Ophthalmology & Visual Science
    |March 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Retinoblastoma tumors contain significant calcium, often missed by standard X-rays. Newer imaging techniques can better detect this calcification for improved diagnosis.

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    Area of Science:

    • Ophthalmology
    • Oncology
    • Radiology

    Background:

    • Retinoblastoma, a common childhood eye cancer, frequently exhibits calcification.
    • Standard roentgenograms often fail to detect tumor calcification accurately.

    Purpose of the Study:

    • To evaluate the correlation between histopathologic and radiographic detection of calcium in retinoblastoma.
    • To compare calcium content in retinoblastoma eyes versus control eyes.
    • To identify optimal diagnostic modalities for detecting retinoblastoma calcification.

    Main Methods:

    • Histopathologic examination of 40 retinoblastoma tumors.
    • Roentgenographic analysis of 16 retinoblastoma cases.
    • Quantitative calcium determination in tumor tissue.

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  • Comparison with newer imaging techniques: hypocycloidal polytomography, computerized transaxial tomography, ultrasonography, and radionuclide scintigraphy.

    • Main Results:

    • Histologic calcification was present in 38/40 tumors, while only 3/16 roentgenograms were positive.
    • Radiographic and histopathologic detection of calcification showed poor correlation with quantitative calcium levels.
    • Retinoblastoma eyes had significantly higher calcium content compared to control eyes (218 vs. 1.2 mug/ml. ash).

    Conclusions:

    • Standard roentgenography is unreliable for detecting calcification in retinoblastoma.
    • Advanced imaging modalities are crucial for identifying tumor calcification.
    • Significant intraocular calcification is a hallmark of retinoblastoma, necessitating advanced diagnostic approaches.