H. M. LLOYD, D.M.
To the editor: Frame, Foroozanfar, and Patton (Ann Intern Med 73:253-257, 1970) referred to a recent classification (1) of primary hyperparathyroidism without, however, applying it explicitly to their patient. The authors considered that the patient fell outside the two main groups, but it should be made clear that she is excluded from group 1 because she had no subperiosteal erosions or bone cysts radiologically and so did not have overt bone disease as defined for the purposes of this study. Of the 138 patients (Professor Dent's series) who provided data for analysis, 19 had neither overt (hyperparathyroid) bone disease nor
LLOYD HM. Classification of Primary Hyperparathyroidism. Ann Intern Med. 1971;74:798–799. doi: 10.7326/0003-4819-74-5-798
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Published: Ann Intern Med. 1971;74(5):798-799.
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