Increased chromosomal imbalances in recurrent pituitary adenomas
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ID: 117818
2001
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Abstract
Eight pituitary adenomas (four gonadotroph cell adenomas, three prolactin cell adenomas, one null cell adenoma) and their respective recurrences in the same patients were studied by comparative genomic hybridization. Chromosomal imbalances were found in seven of eight patients affecting two of eight primary and seven of eight recurrent tumors. Overall, pituitary adenomas showed an average of 1.6 chromosomal imbalances per primary and 3.4 per recurrent tumor (P<0.01). Prolactin cell adenomas showed an average of 4.3 chromosomal changes per primary and 6.3 per recurrent tumor, which were significantly more common than in gonadotroph cell adenomas (0 vs 1.7 changes; P<0.05) and the null cell adenoma (0 vs 1.0 changes; P<0.05). The most common changes were gains of 4q (in three of eight recurrences), 5q, and 13q (in two of eight recurrences each) as well as losses of chromosome 2 (in both primary and recurring tumors of two patients), 1p, 8q, 10, and 12q (in two of eight recurrences). Minimal common regions associated with recurrent adenomas were gains of 4q31.2-34 (three recurrences), 5q14-23 and 13q21-31 and losses of 12q24.3-qter (two recurrences each). The average MIB-1 proliferation indices were 1.2% for primary and 1.9% for recurrent adenomas (P<0.005). Our findings suggest that acquisition of certain chromosomal imbalances is related to and may underlie adenoma recurrence.
| Reference Key |
rickert2001actaincreased
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| Authors | Christian H. Rickert;Barbara Dockhorn-Dworniczak;Günter Busch;Dag Maskopp;Friedrich K. Albert;Burckhard Rama;Werner Paulus;Christian H. Rickert;Barbara Dockhorn-Dworniczak;Günter Busch;Dag Maskopp;Friedrich K. Albert;Burckhard Rama;Werner Paulus; |
| Journal | acta neuropathologica |
| Year | 2001 |
| DOI |
doi:10.1007/s004010100413
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| URL | |
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