Abstract
Invasive pituitary adenomas and pituitary carcinomas are clinically indistinguishable until identification of metastases. Optimal management and survival outcomes for both are not clearly defined. The purpose of this study is to use the Surveillance, Epidemiology, and End Results (SEER) database to report patterns of care and compare survival outcomes in a large series of patients with invasive adenomas or pituitary carcinomas. One hundred seventeen patients diagnosed between 1973 and 2008 with pituitary adenomas/adenocarcinomas were included. Eighty-three invasive adenomas and seven pituitary carcinomas were analyzed for survival outcomes. Analyzed prognostic factors included age, sex, race, histology, tumor extent, and treatment. A significant decrease in survival was observed among carcinomas compared to invasive adenomas at 1, 2, and 5 years (p = 0.047, 0.001, and 0.009). Only non-white race, male gender, and age ≥65 were significant negative prognostic factors for invasive adenomas (p = 0.013, 0.033, and <0.001, respectively). There was no survival advantage to radiation therapy in treating adenomas at 5, 10, 20, or 30 years (p = 0.778, 0.960, 0.236, and 0.971). In conclusion, pituitary carcinoma patients exhibit worse overall survival than invasive adenoma patients. This highlights the need for improved diagnostic methods for the sellar phase to allow for potentially more aggressive treatment approaches.
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Ludwig Benes, Arnsberg Germany
This well-written and interesting article deals with the rare pathologies of invasive pituitary adenomas and carcinomas collected over a 35-year time period. The data from a large series of 117 individuals suffering from these pathologies is illustrated comprehensively. Information is given regarding the role of genetic studies on this topic and also the prognostic significance of molecular markers. The authors nicely point out the differences in survival outcomes in these patients during a long follow-up period of 10 years underlining what most of the readers may have thought but could not really prove on the basis of a robust data analysis.
Paolo Cappabianca, Teresa Somma, Naples, Italy
The authors present a retrospective analysis pointing out the differences in terms of survival outcomes in patients with invasive pituitary adenomas and carcinomas over a 10-year follow-up period. Once again, the importance of early differential diagnosis has been emphasized to provide patients with an adequate treatment.
Though, this manuscript offers the possibility to draw many considerations.
The invasive adenoma is identified as a benign pituitary tumor, even if it exhibits an aggressive biological behavior, infiltrating the dura mater, cranial bone, or sphenoid sinus. Our experience constantly teaches us to warn these “false benign” lesions; they, indeed, require difficult management to achieve an adequate disease control. The pituitary carcinoma is defined as a tumor of the pituitary gland exhibiting cerebrospinal and/or systemic metastasis.
In our opinion, clinical evaluation of the patient needs to be completed by head and spinal MR and total body PET/CT to diagnose the presence of eventual metastasis indicative of a neoplastic progression. The metastatic dissemination more commonly involves the CSF axis, including virtually any site within the supratentorial, infratentorial, and spinal compartments. Extradural dissemination occurs less frequently and also exhibits less geographic restraint; bone, liver, lymph nodes, lung, kidney, and heart have all been reported as evidence of malignancy.
Furthermore, we believe that the genetic analysis can be useful not only to evaluate the biological behavior, as affirmed in the article, but also to define the therapeutic efficacy.
In the manuscript, the authors affirm the need of an aggressive treatment for these lesions.
We think that surgery must be completed by medical and radiation therapy.
The drug temozolomide has recently been documented to be effective against these lesions (1, 5, 7) especially if they show low levels of MGMT expression or present the immunopositivity of MSH6 (2, 4, 8), though new targeted therapies have been studied for lesions resistant to temozolomide (3, 6, 9). Finally, the radiotherapy plays an important role in the management of these lesions, especially in those of incomplete surgical resection and low effectiveness of medical treatment.
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Hansen, T.M., Batra, S., Lim, M. et al. Invasive adenoma and pituitary carcinoma: a SEER database analysis. Neurosurg Rev 37, 279–286 (2014). https://doi.org/10.1007/s10143-014-0525-y
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DOI: https://doi.org/10.1007/s10143-014-0525-y