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Journal of Clinical Endocrinology & Metabolism, Vol 81, 3194-3196, Copyright © 1996 by Endocrine Society
ARTICLES |
C Dotzenrath, BT Teh, F Farnebo, K Cupisti, A Svensson, A Toell, P Goretzki and C Larsson
Department of Surgery, Heinrich Heine Universitat, Dusseldorf, Germany.
Allelic loss of the retinoblastoma tumor suppressor gene has recently been shown to be highly specific for parathyroid carcinoma. It has been proposed that this genetic abnormality may have diagnostic and prognostic implications for parathyroid carcinoma, but to date no further studies are available to substantiate these findings. In the present study, three cases of atypical recurrent hyperparathyroidism were examined: a patient with parathyroid carcinoma and an autotransplanted adenoma that progressed into carcinoma, a patient with recurrent juvenile hyperparathyroidism, and a patient with severe recurrent secondary hyperparathyroid disease due to rapidly growing autotransplant. Six pairs each of sporadic parathyroid adenoma and secondary parathyroid disease were also studied for comparison. Allelic losses of RB and D13S71 at 13q14 was found in the parathyroid carcinoma and the corresponding autotransplant that had previously been considered benign tissue and in the case of recurrent juvenile hyperparathyroidism, but not in any of the other tumors. Our findings support the findings of the previous study that RB or 13q loss is specific for parathyroid tumors with increased aggressiveness and might be of clinical significance.
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