Abstract
The normal and pathological anatomy of the parathyroid glands (PTG) as seen by light microscopy is well known (Bargmann, 1939; Castleman, 1952; Roth, 1962; Altenahr et al., 1969; Seifert and Altenahr, 1969). However, the cellular mechanisms of hormone production and secretion have not yet been clarified to any great extent. Therefore the aim of ultrastructural studies of PTG was primarily to analyse in more detail the function of PTG under different physiological and pathological conditions. In addition, a more refined cytological diagnosis of PTG would offer new prospects regarding clinical, diagnostic, and therapeutical questions, by determining whether a primary change in the PTG causes the disturbance in calcium metabolism or whether the altered PTG ultrastructure is secondary to calcium metabolism disturbances of other aetiology.
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