Abstract
Purpose
Granular cell tumors (GCT) are highly vascularized and adherent to adjacent structures, and so, complete resection represents a challenge. Adjuvant therapy decisions for residual GCTs currently relies on individual clinician decisions due to a paucity of systematic literature data. We present a comprehensive analysis about the impact of adjuvant therapy in reported cases of patients with incomplete GCT resection.
Methods
One database (PubMed) and crossed references were queried for GCT with incomplete resection or biopsy from 1962 to 2020. Literature review was performed according to the PRISMA guidelines. Also, two patients with residual GCT from our institutions are added to the analysis. Data regarding clinical presentation, surgical approach, use of adjuvant therapy, Ki-67 labeling, and follow up assessments were extracted and analyzed from selected publications.
Results
Thirty-three studies met the predetermined inclusion criteria and 53 patients were selected (including our two reported cases). The median of age was 49 [IQR, 39–60 years], with a slight male predominance (1.2:1). Among the surgical procedures, seven (13%) were biopsies alone. Adjuvant therapy was used in 18 patients (radiotherapy, 94.5%; chemotherapy, 5.5%) but there is no statistical correlation with adjuvant therapy and the progression of the remnant tumor (p = 0.33). Our institutions’ patients did not receive adjuvant therapy and did not show tumor progression on MRI.
Conclusion
Our systematic literature review suggests there is a limited role for chemo and/or radiotherapy in the management of incomplete GCT resection. It may be reasonable recommending close clinical follow up in patients with incomplete resection.
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Abbreviations
- GCT:
-
Granular cell tumor
- STR:
-
Subtotal resection
- PR:
-
Partial resection
- MRI:
-
Magnetic resonance imaging
- CT:
-
Computed tomography
- GTR:
-
Gross total resection
- RT:
-
Radiotherapy
- CTX:
-
Chemotherapy
- CFU:
-
Close follow up
- WHO:
-
World Health Organization
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Acknowledgements
We would like to acknowledge the meaningful contributions of Jose Otero, MD, PhD (Pathology Department, Ohio State University), who provided the pathological slides and helped with the histology description.
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Daniel M. Prevedello is a consultant for Integra LifeSciences Corp, Stryker Corporation and Medtronic Corp. Daniel Prevedello has equity on 3 rivers LLC, eLUM Technologies, LLC and Soliton LLC. Daniel Prevedello receives royalties from KLS-Martin, ACE Medical and Mizuho.
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Rubino, F., Martinez-Perez, R., Vieira, S. et al. Granular cell tumors of the sellar region: what should be done after subtotal resection? A systematic review. Pituitary 23, 721–732 (2020). https://doi.org/10.1007/s11102-020-01068-6
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DOI: https://doi.org/10.1007/s11102-020-01068-6