J Neurol Surg B Skull Base 2017; 78(06): 506-511
DOI: 10.1055/s-0037-1604409
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Effectiveness of Bilateral Inferior Petrosal Sinuses Sampling in Tumor Lateralization: Intraoperative Findings and Postoperative Results

Pablo Harker
1   Neuroscience Department, Hospital Universitario San Ignacio, Bogotá, Colombia
2   Faculty of Medicine, Pontificia Universidad Javeriana, Bogotá, Colombia
,
Oscar Feo-Lee
1   Neuroscience Department, Hospital Universitario San Ignacio, Bogotá, Colombia
,
Manuel Giraldo-Grueso
2   Faculty of Medicine, Pontificia Universidad Javeriana, Bogotá, Colombia
,
Juan Carlos Puentes
1   Neuroscience Department, Hospital Universitario San Ignacio, Bogotá, Colombia
3   Radiology Department, Fundación Cardioinfantil–Instituto de Cardiología, Bogotá, Colombia
› Author Affiliations
Further Information

Publication History

17 January 2017

17 June 2017

Publication Date:
31 July 2017 (online)

Zoom Image

Abstract

Object Diagnosis and treatment of Cushing's disease (CD) is a demanding endeavor. We evaluated the effectiveness of inferior petrosal sinus sampling (IPSS) in preoperative tumor lateralization and surgical outcomes.

Methods Fifty-two consecutive patients with CD and normal magnetic resonance imaging (MRI) were enrolled between 2009 and 2015. Selective catheterization of petrosal sinuses for IPSS was performed. All patients underwent microsurgical dissection, and if a lesion was found, underwent lesion resection. Demographic, biochemical, and intraoperative findings were prospectively collected and reviewed 6 and 12 months postoperatively.

Results Forty-five patients (86.4%) had clear lateralization while seven patients had bilateral elevation. Twenty-two patients (42%) were found to have a macroscopic lesion, defined as an abnormal tissue during microsurgical dissection, which was thus resected. No patient had a lesion larger than 4 mm. Eighty-one percent of patients had the lesion where IPSS had been predicted. Hemi-hypophysectomy was performed on twenty-eight patients based on IPSS findings, since no lesion was found. Eighty-six percent of patients with lesion resection had biochemical remission by 12 months. Biochemical remission was documented in 78 and 71% of patients who underwent hemi-hypophysectomy by 6 and 12 months, respectively.

Conclusion With careful microsurgical dissection, a macroscopic lesion could be found in a significant number of patients with normal MRI. When no lesion was found, we recommend performing a hemi-hypophysectomy based on IPSS findings, since prediction accuracy was high and remission rates were significant.

Financial Support

None.


Crossref Cited-by logo
Article Citations