Magnetic resonance imaging-guided fine needle aspiration for the diagnosis of skull base lesions
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Published on: July 5, 2021
Abstract:
Magnetic resonance imaging (MRI)-guided fine needle aspiration was used to obtain tissue from lesions of the skull base for cytologic diagnoses in 14 patients. Our technique utilized a guiding system to enable three-dimensional orientation in a two-dimensional scan and a high nickel content 22 gauge needle to minimize significantly MRI artifact. Needle access to the skull base was provided through a subzygomatic or retromandibular approach. In seven of nine cases an accurate diagnosis was established by this technique and later confirmed by surgical exploration and histologic analysis. Failure to obtain a representative specimen from the lesion occurred in one case and difficulty in interpreting the cytologic features of the tissue was encountered in another case. The indications, limitations, and technical details of the procedure are described.
Insights
Magnetic resonance imaging (MRI)-guided fine needle aspiration successfully diagnosed skull base lesions in most patients. This minimally invasive technique offers a viable option for obtaining cytologic diagnoses from challenging anatomical locations.
Area of Science:
- Medical Imaging
- Oncology
- Neurosurgery
Background:
- Skull base lesions require accurate diagnosis for effective treatment.
- Minimally invasive biopsy techniques are crucial for reducing patient morbidity.
- Magnetic resonance imaging (MRI) offers detailed anatomical visualization.
Purpose of the Study:
- To evaluate the efficacy of MRI-guided fine needle aspiration (FNA) for cytologic diagnosis of skull base lesions.
- To describe the technical aspects of performing MRI-guided FNA in the skull base region.
- To assess the diagnostic accuracy and limitations of this procedure.
Main Methods:
- MRI-guided fine needle aspiration (FNA) was performed on 14 patients with skull base lesions.
- A specialized guiding system was used for 3D orientation on 2D scans.
- A high nickel content 22-gauge needle was employed to minimize MRI artifacts.
- Subzygomatic or retromandibular approaches were utilized for needle access.
Main Results:
- Accurate cytologic diagnoses were achieved in 7 out of 9 cases, confirmed by subsequent surgical and histologic analysis.
- The technique successfully obtained representative specimens in most cases.
- MRI artifact was significantly minimized using the specialized needle and technique.
Conclusions:
- MRI-guided fine needle aspiration is an effective method for diagnosing skull base lesions.
- The described technique, utilizing specific guiding systems and needles, enhances diagnostic accuracy.
- This minimally invasive approach provides valuable cytologic information for treatment planning.
