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The Aging Thyroid: I. A Description of Lesions and an Analysis of Their Age and Sex Distribution
Author(s) -
Blumenthal Herman T.,
Perlstein Irving B.
Publication year - 1987
Publication title -
journal of the american geriatrics society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.992
H-Index - 232
eISSN - 1532-5415
pISSN - 0002-8614
DOI - 10.1111/j.1532-5415.1987.tb02337.x
Subject(s) - medicine , thyroid , lesion , colloid cyst , pathology , dysplasia , thyroiditis , calcitonin , cyst
Two types of follicular change in the thyroid are described. The first represents an involutional change in which colloid cysts (macrofollicles) are often found. The second represents a hyperplastic‐dysplastic (microfollicular) lesion. Two types of change in calcitonin (C) cells are also described, one of which may represent an involutional process, although this is not certain. The second is a hyperplastic (micronodular) lesion, but without evidence of dysplasia. An infiltration of lymphocytes is also commonly encountered. Only about 15% of cases after age 60 are free of the follicular and lymphoid lesions. Both the macro‐ and microfollicular lesions show a statistically significant increase with age, as do the lymphoid lesion and its derivative Hashimoto's thyroiditis. C cell micronodules also appear to increase with age, but there are too few such cases for a reliable statistical analysis. An analysis of combinations of the follicular and lymphoid lesions show a particularly frequent association of the microfollicular and lymphoid lesions. Evidence is presented suggesting that many microfollicular lesions may represent clones of mutated cells, and that the lymphocytes may be targeted to these microfollicles. Lymphocytes were rarely found in association with C cell micronodules. Within individual thyroids there is considerable variation in the proportion of each lesion when combinations are present. Thus with advancing age there is. an increasing heterogeneity of thyroid structure that may confound attempts to correlate structural and physiological changes with age. J Am Geriatr Soc 35:843–854, 1987