Download PDF
J Neurol Surg B Skull Base 2019; 80(03): 252-257
DOI: 10.1055/s-0038-1668516
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Tumor to Cerebellar Peduncle T2-Weighted Imaging Intensity Ratio Fails to Predict Pituitary Adenoma Consistency

Panagiotis Mastorakos
1   Department of Neurological Surgery, University of Virginia Health Science Center, University of Virginia, Charlottesville, Virginia, United States
2   Department of Neurological Surgery, NIH/NINDS, Bethesda, Maryland, United States
,
Gautam U. Mehta
1   Department of Neurological Surgery, University of Virginia Health Science Center, University of Virginia, Charlottesville, Virginia, United States
2   Department of Neurological Surgery, NIH/NINDS, Bethesda, Maryland, United States
3   Department of Neurosurgery, University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States
,
Ajay Chatrath
1   Department of Neurological Surgery, University of Virginia Health Science Center, University of Virginia, Charlottesville, Virginia, United States
,
Shayan Moosa
1   Department of Neurological Surgery, University of Virginia Health Science Center, University of Virginia, Charlottesville, Virginia, United States
,
Maria-Beatriz Lopes
1   Department of Neurological Surgery, University of Virginia Health Science Center, University of Virginia, Charlottesville, Virginia, United States
4   Department of Neuroathology, University of Virginia Health Science Center, University of Virginia, Charlottesville, Virginia, United States
,
Spencer C. Payne
5   Department of Otolaryngology, University of Virginia Health Science Center, University of Virginia, Charlottesville, Virginia, United States
,
John A. Jane Jr.
1   Department of Neurological Surgery, University of Virginia Health Science Center, University of Virginia, Charlottesville, Virginia, United States
› Author Affiliations Funding This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
This work has not been previously presented or published and is not under consideration for publication by any other journal.
Further Information

Publication History

16 March 2018

07 July 2018

Publication Date:
24 August 2018 (online)

Also available at
    Permissions and Reprints

Abstract

Object The consistency of pituitary macroadenomas affects the complexity of surgical resection. On T2-weighted (T2W) imaging, the intensity ratio of the tumor to the cerebellar peduncle (tumor to cerebellar peduncle T2-weighted imaging intensity [TCTI] ratio) correlates with meningioma consistency. We aimed to determine the correlation of this radiographic finding with pituitary macroadenoma consistency and to determine whether it can be used for preoperative planning.

Methods We performed a retrospective evaluation of 196 patients with macroadenomas who underwent endoscopic transsphenoidal resection from January 2012 to June 2017. Macroadenoma consistency was determined by one senior neurosurgeon at the time of surgery. Axial and coronal T2W magnetic resonance imaging images were evaluated retrospectively, and adenoma size, Knosp grade, suprasellar extension and TCTI were calculated.

Results The mean TCTI ratio was 1.70 (95% confidence interval [CI]: 1.65–1.75). Intraoperatively, 140 (71.4%) adenomas were classified as soft and 48 (24.5%) as fibrous. Gross total resection was achieved in 66.7% of fibrous adenomas and in 86.4% of soft adenomas (p = 0.007). The mean ratio was 1.68 (95% CI: 1.62–1.74) for soft tumors and 1.76 (95%CI: 1.67–1.84) for fibrous tumors. There was no difference in the mean TCTI ratio between groups. Lactotroph and somatotroph adenomas had a lower mean TCTI ratio compared with other functioning and nonfunctioning adenomas with a mean TCTI of 1.52 compared with 1.77.

Conclusions In this retrospective cohort study, we found that the TCTI ratio does not correlate with tumor consistency. We also noted that the TCTI ratio is increased in prolactin and growth hormone-secreting adenomas.

Keywords

macroadenoma - pituitary adenoma - transsphenoidal - consistency - T2-weighted imaging intensity
 

  • References

  • 1 Naganuma H, Satoh E, Nukui H. Technical considerations of transsphenoidal removal of fibrous pituitary adenomas and evaluation of collagen content and subtype in the adenomas. Neurol Med Chir (Tokyo) 2002; 42 (05) 202-212 , discussion 213
    CrossrefPubMedGoogle Scholar
  • 2 Couldwell WT. Transsphenoidal and transcranial surgery for pituitary adenomas. J Neurooncol 2004; 69 (1-3): 237-256
    CrossrefPubMedGoogle Scholar
  • 3 Taylor DG, Jane Jr JA, Oldfield EH. Resection of pituitary macroadenomas via the pseudocapsule along the posterior tumor margin: a cohort study and technical note. J Neurosurg 2018; 128 (02) 422-428
    CrossrefPubMedGoogle Scholar
  • 4 Snow RB, Lavyne MH, Lee BC, Morgello S, Patterson Jr RH. Craniotomy versus transsphenoidal excision of large pituitary tumors: the usefulness of magnetic resonance imaging in guiding the operative approach. Neurosurgery 1986; 19 (01) 59-64
    CrossrefPubMedGoogle Scholar
  • 5 Iuchi T, Saeki N, Tanaka M, Sunami K, Yamaura A. MRI prediction of fibrous pituitary adenomas. Acta Neurochir (Wien) 1998; 140 (08) 779-786
    CrossrefPubMedGoogle Scholar
  • 6 Yiping L, Ji X, Daoying G, Bo Y. Prediction of the consistency of pituitary adenoma: A comparative study on diffusion-weighted imaging and pathological results. J Neuroradiol 2016; 43 (03) 186-194
    CrossrefPubMedGoogle Scholar
  • 7 Snow RB, Johnson CE, Morgello S, Lavyne MH, Patterson Jr RH. Is magnetic resonance imaging useful in guiding the operative approach to large pituitary tumors?. Neurosurgery 1990; 26 (05) 801-803
    CrossrefPubMedGoogle Scholar
  • 8 Bahuleyan B, Raghuram L, Rajshekhar V, Chacko AG. To assess the ability of MRI to predict consistency of pituitary macroadenomas. Br J Neurosurg 2006; 20 (05) 324-326
    CrossrefPubMedGoogle Scholar
  • 9 Smith KA, Leever JD, Chamoun RB. Predicting consistency of meningioma by magnetic resonance imaging. J Neurol Surg B Skull Base 2015; 76 (03) 225-229
    Article in Thieme ConnectPubMedGoogle Scholar
  • 10 Smith KA, Leever JD, Hylton PD, Camarata PJ, Chamoun RB. Meningioma consistency prediction utilizing tumor to cerebellar peduncle intensity on T2-weighted magnetic resonance imaging sequences: TCTI ratio. J Neurosurg 2017; 126 (01) 242-248
    CrossrefPubMedGoogle Scholar
  • 11 Yao A, Pain M, Balchandani P, Shrivastava RK. Can MRI predict meningioma consistency? A correlation with tumor pathology and systematic review. Neurosurg Rev 2018; 41 (03) 745-753
    CrossrefPubMedGoogle Scholar
  • 12 Smith KA, Leever JD, Chamoun RB. Prediction of consistency of pituitary adenomas by magnetic resonance imaging. J Neurol Surg B Skull Base 2015; 76 (05) 340-343
    Article in Thieme ConnectPubMedGoogle Scholar
  • 13 Boxerman JL, Rogg JM, Donahue JE, Machan JT, Goldman MA, Doberstein CE. Preoperative MRI evaluation of pituitary macroadenoma: imaging features predictive of successful transsphenoidal surgery. AJR Am J Roentgenol 2010; 195 (03) 720-728
    CrossrefPubMedGoogle Scholar
  • 14 Chakrabortty S, Oi S, Yamaguchi M, Tamaki N, Matsumoto S. Growth hormone-producing pituitary adenomas: MR characteristics and pre- and postoperative evaluation. Neurol Med Chir (Tokyo) 1993; 33 (02) 81-85
    CrossrefPubMedGoogle Scholar
  • 15 Hagiwara A, Inoue Y, Wakasa K, Haba T, Tashiro T, Miyamoto T. Comparison of growth hormone-producing and non-growth hormone-producing pituitary adenomas: imaging characteristics and pathologic correlation. Radiology 2003; 228 (02) 533-538
    CrossrefPubMedGoogle Scholar