Abstract
The aim of this study was to determine the factors influencing the use of a transcranial (TC) approach in pituitary adenomas and suggest a decision-making tree for the surgical strategy. The data for 23 (4.6 %) patients who underwent TC surgery from amongst 494 pituitary adenomas were retrospectively analyzed. Eight factors on magnetic resonance imaging (MRI) that could predict a difficult transsphenoidal (TS) surgery were noted. Adverse findings at TS surgery leading to a 2nd stage TC surgery were documented. Eighteen of the 23 cases were giant adenomas. Thirteen patients underwent TC surgery alone or as an initial approach when combined with TS while 10 underwent 2nd stage TC surgery following a TS approach. Most cases in the first group had 3 or more radiological factors in combination with a small sella. The 2nd group had higher sellar tumor volumes and fewer unfavourable radiological factors that led to the initial use of the TS approach. A hard, fibrous consistency or a significant residue obscured from the surgeon’s view, and difficulty in hemostasis were additional factors prompting the use of a TC approach. Tumor excision ≥90 % could be achieved in 13 cases (56.5 %). Post-operative RT was administered in 12 patients. There were 2 deaths (8.7 %) and the major morbidity rate was 43 %. Despite advances in endoscopic surgery the TC approach may be required in 5 % of cases. A study of the preoperative MRI for factors that predict difficulty with the TS approach might encourage the surgeon to consider a TC surgery either as an initial approach or combined with a TS surgery.
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Abbreviations
- TC:
-
Transcranial
- TS:
-
Transsphenoidal
- MRI:
-
Magnetic resonance imaging
- T4:
-
Thyroxine
- FTC:
-
Free thyroxine concentration
- TSH:
-
Thyroid stimulating hormone
- FSH:
-
Follicle stimulating hormone
- LH:
-
Luteinizing hormone
- GH:
-
Growth hormone
- IGF-1:
-
Insulin-like growth factor
- OGTT:
-
Oral glucose tolerance test
- PACS:
-
Picture archiving and communication system
- ICA:
-
Internal carotid artery
- FLAIR:
-
Fluid attenuated inversion recovery
- CT:
-
Computed tomography
- ACoA:
-
Anterior communicating artery
- ETCO2 :
-
End tidal CO2
- CSF:
-
Cerebrospinal fluid
- RT:
-
Radiation therapy
- SRT:
-
Stereotactic radiation therapy
- SD:
-
Standard deviation
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Acknowledgments
We would like to thank Dr. KS Jacob for helping with the statistical analysis. We would also like to thank Mr. Rajkumar G. and Dr. K Srinivasa Babu for the illustrations.
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The authors declare that there were no ethical issues related to this study and have complied with the current laws of our country.
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The authors declare that they have no conflict of interest.
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Pratheesh, R., Rajaratnam, S., Prabhu, K. et al. The current role of transcranial surgery in the management of pituitary adenomas. Pituitary 16, 419–434 (2013). https://doi.org/10.1007/s11102-012-0439-z
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DOI: https://doi.org/10.1007/s11102-012-0439-z