|
1
|
Pangal DJ, Wishart D, Shiroishi MS, Ruzevick J, Carmichael JD, Zada G. Growth hormone secreting pituitary adenomas show distinct extrasellar extension patterns compared to nonfunctional pituitary adenomas. Pituitary 2022; 25:480-485. [PMID: 35334028 DOI: 10.1007/s11102-022-01217-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/10/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE Patterns of extension of pituitary adenomas (PA) may vary according to PA subtype. Understanding extrasellar extension patterns in growth hormone PAs (GHPA) vis-a-vis nonfunctional PAs (NFPAs) may provide insights into the biology of GHPA and future treatment avenues. METHODS Preoperative MR imaging (MRI) in 179 consecutive patients treated surgically for NFPA (n = 139) and GHPA (n = 40) were analyzed to determine patterns of extrasellar growth. Extension was divided into two principal directions: cranio-caudal (measured by infrasellar/suprasellar extension), and lateral cavernous sinus invasion (CSI) determined by Knosp grading score of 3-4. Suprasellar extension was defined as tumor extension superior to the tuberculum sellae- dorsum sellae line, and inferior extension as invasion through the sellar floor into the sphenoid sinus or clivus. Categorical analysis was performed using Fisher's exact test. RESULTS GHPAs were overall more likely to remain purely intrasellar compared to NFPA (50% vs 26%, p < 0.001). GHPAs, however, were 7 times more likely to exhibit isolated infrasellar extension compared to NFPA (20% vs 2.8%, p = 0.001). Conversely, NFPAs were twice as likely to exhibit isolated suprasellar extension compared to GHPA (60% vs 28%, p < 0.001), as well as combined suprasellar/infrasellar extension (25% vs 3%, p = 0.011). There were no overall differences in CSI between the two subgroups. DISCUSSION GHPA and NFPA demonstrate distinct extrasellar extension patterns on MRI. GHPAs show proclivity for inferior extension with bony invasion, whereas NFPAs are more likely to exhibit suprasellar extension through the diaphragmatic aperture. These distinctions may have implications into the biology and future treatment of PAs.
Collapse
Affiliation(s)
- Dhiraj J Pangal
- USC Brain Tumor Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
| | - Danielle Wishart
- USC Brain Tumor Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Mark S Shiroishi
- USC Brain Tumor Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Division of Neuroradiology, Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Jacob Ruzevick
- USC Brain Tumor Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - John D Carmichael
- USC Brain Tumor Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Division of Endocrinology, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Gabriel Zada
- USC Brain Tumor Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Neurosurgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| |
Collapse
|