Cancers, Vol. 9, Pages 103: Secondary Intracranial Tumors Following Radiotherapy for Pituitary Adenomas: A Systematic Review

Cancers, Vol. 9, Pages 103: Secondary Intracranial Tumors Following Radiotherapy for Pituitary Adenomas: A Systematic Review Cancers doi: 10.3390/cancers9080103 Authors: Ryuya Yamanaka Eisuke Abe Toshiteru Sato Azusa Hayano Yasuo Takashima Pituitary adenomas are often treated with radiotherapy for the management of tumor progression or recurrence. Despite the improvement in cure rates, patients treated by radiotherapy are at risk of development of secondary malignancies. We conducted a comprehensive literature review of the secondary intracranial tumors that occurred following radiotherapy to pituitary adenomas to obtain clinicopathological characteristics. The analysis included 48 neuroepithelial tumors, 37 meningiomas, and 52 sarcomas which were published between 1959–2017, although data is missing regarding overall survival and type of irradiation in a significant proportion of the reports. The average onset age for the pituitary adenoma was 37.2 ± 14.4 years and the average latency period before the diagnosis of the secondary tumor was 15.2 ± 8.7 years. Radiotherapy was administered in pituitary adenomas at an average dose of 52.0 ± 19.5 Gy. The distribution of pituitary adenomas according to their function was prolactinoma in 10 (7.2%) cases, acromegaly in 37 (27.0%) cases, Cushing disease in 4 (2.9%) cases, PRL+GH in 1 (0.7%) case, non-functioning adenoma in 57 (41.6%) cases. Irradiation technique delivered was lateral opposing field in 23 (16.7%) c...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Review Source Type: research