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  • Title: Age-related changes in the thymus gland: CT-pathologic correlation.
    Author: Moore AV, Korobkin M, Olanow W, Heaston DK, Ram PC, Dunnick NR, Silverman PM.
    Journal: AJR Am J Roentgenol; 1983 Aug; 141(2):241-6. PubMed ID: 6603111.
    Abstract:
    Recent reports suggest that computed tomography (CT) is useful for thymoma detection in patients with myasthenia gravis. However, that usefulness may be conditioned by the state of the normal thymus. To examine this concept, the CT findings in 64 consecutive patients with histologic confirmation of thymic status after thymectomy or thymic biopsy during mediastinal exploration were reviewed. The normal thymus has a bilobed, arrowhead-shaped cross section at all ages, with gradual focal or diffuse fatty infiltration of the parenchyma usually occurring between 20 and 40 years of age. A thymoma is usually a spherical or oval mass, often producing a focal, distinct bulge in the adjacent pleural reflection. The differentiation of thymoma from normal thymus should be possible in most patients if age-related changes in the normal gland are appreciated.
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