Acoustic Schwannoma

2008 ◽  
pp. 275-281
Author(s):  
William M. Mendenhall ◽  
Robert J. Amdur ◽  
Robert S. Malyapa ◽  
William A. Friedman
Keyword(s):  
Acoustic Schwannoma

Acoustic Schwannoma

2020 ◽  
Author(s):  
Keyword(s):  
Acoustic Schwannoma

Cervical dumbbell meningioma and bilateral acoustic schwannoma in a patient with neurofibromatosis type 2

2005 ◽  
Vol 55 (3) ◽  
pp. 71-73 ◽  
Author(s):  
Ansari Mukhtar Alam ◽  
Ibrahim Lutfi Shuaib ◽  
Rudra Ghimire
Keyword(s):  
Neurofibromatosis Type ◽  
Neurofibromatosis Type 2 ◽  
Acoustic Schwannoma

Neurofibromatosis type 2: growth stimulation of mixed acoustic schwannoma by concurrent adjacent meningioma: possible role of growth factors

1998 ◽  
Vol 89 (1) ◽  
pp. 149-154 ◽  
Author(s):  
Roberto Pallini ◽  
Angelo Tancredi ◽  
Patrizia Casalbore ◽  
Delio Mercanti ◽  
Luigi M. Larocca ◽  
...  
Keyword(s):  
Neurofibromatosis Type ◽  
Growth Stimulation ◽  
Neurofibromatosis Type 2 ◽  
Annual Growth Rate ◽  
Content Type ◽  
Acoustic Schwannoma ◽  
Epidermal Growth ◽  
The One

✓ The authors report the case of a young man suffering from neurofibromatosis type 2 (NF2) who harbored bilateral acoustic schwannomas and a parasellar meningioma. Neuroimaging studies performed during a 4-year follow-up period showed that the bilateral schwannomas had grown very little and at similar rates. However, after the meningioma had infiltrated the tentorium and approached the ipsilateral schwannoma at the incisura, both Schwann cell tumors started to grow rapidly, particularly the one adjacent to the meningioma, of which the percentage of annual growth rate increased by approximately a factor of 102. At the same time, magnetic resonance imaging showed that this tumor also changed its features. During surgery, the acoustic schwannoma was firmly adherent to both meningioma and tentorium. Histological examination revealed meningotheliomatous cells in the schwannoma adjacent to the meningioma. Antiphosphotyrosine immunoblotting of PC12 cells was compatible with the presence of an epidermal growth factor (EGF)—like molecule in the cerebrospinal fluid (CSF) of the patient. This factor was not detected in the CSF of five other NF2 patients, two of whom bore associated bilateral acoustic schwannomas and meningioma in remote locations. It is hypothesized that the meningotheliomatous cells infiltrating the schwannoma triggered an autocrine/paracrine growth—stimulatory mechanism that involved an EGF-like factor.

Tc-99m MIBI Brain SPECT of an Acoustic Schwannoma

1994 ◽  
Vol 19 (2) ◽  
pp. 152-154 ◽  
Author(s):  
CHAN H. PARK ◽  
SUNG M. KIM ◽  
JAMES ZHANG ◽  
JACK R. McEWAN ◽  
CHARLES INTENZO
Keyword(s):  
Brain Spect ◽  
Acoustic Schwannoma

Frameless Hypo-fractionated Radiosurgery For Koos Grade 4 Acoustic Schwannoma

2020 ◽  
Vol 108 (3) ◽  
pp. e693-e694
Author(s):  
V. Shankar ◽  
V. Sai Shreya ◽  
U. Andar ◽  
C.E. Deopujari ◽  
H. Vyas ◽  
...  
Keyword(s):  
Acoustic Schwannoma

Dosimetric comparison of Linac-based (BrainLAB®) and robotic radiosurgery (CyberKnife®) stereotactic system plans for acoustic schwannoma

2011 ◽  
Vol 106 (3) ◽  
pp. 637-642 ◽  
Author(s):  
Debnarayan Dutta ◽  
S. Balaji Subramanian ◽  
V. Murli ◽  
H. Sudahar ◽  
P. G. Gopalakrishna Kurup ◽  
...  
Keyword(s):  
Dosimetric Comparison ◽  
Robotic Radiosurgery ◽  
Stereotactic System ◽  
Acoustic Schwannoma

Criteria for hearing preservation in acoustic schwannoma surgery: The concept of useful hearing

1992 ◽  
Vol 106 (6) ◽  
pp. 500-503 ◽  
Author(s):  
A. E. Hinton ◽  
R. T. Ramsden ◽  
R. H. Lye ◽  
J. E. M. Dutton
Keyword(s):  
Pure Tone ◽  
Tumour Size ◽  
Hearing Preservation ◽  
Discrimination Score ◽  
Speech Discrimination ◽  
Average Difference ◽  
Pure Tone Audiogram ◽  
Speech Discrimination Score ◽  
Acoustic Schwannoma

AbstractIn the quest for hearing preservation in patients with acoustic schwannomas it is essential that surgeons do not lose sight of the concept of ‘useful’ hearing. There is an important difference between hearing preservation which pleases the surgeon and that which will be appreciated by the patient.Tumour size, pure tone audiogram average differences between ears and speech discrimination scores have been recorded in a series of 114 patients with unilateral acoustic schwannomas. Criteria for useful hearing are presented in terms of pure tone audiogram average difference and speech discrimination scores.There were 11 patients (10 per cent) with a speech discrimination score of 50 per cent or more, a pure tone audiogram average difference of 30 dB or better and a tumour size of no more than 2 cm. Only one patient (0.9 per cent) had a speech discrimination score of 50 per cent or more, a pure tone audiogram average difference of 20 dB or better and a tumour size of no more than 1 cm.It is concluded that hearing preservation techniques may be applicable to between 1 and 10 per cent of patients with unilateral acoustic schwannomas.

Gamma Knife Radiosurgery for Acoustic Schwannoma: Effects of Low Radiation Dose and Functional Prognosis

1996 ◽  
Vol 66 (1) ◽  
pp. 134-141 ◽  
Author(s):  
M. Hirato ◽  
H. Inoue ◽  
A. Zama ◽  
C. Ohye ◽  
T. Shibazaki ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Gamma Knife ◽  
Gamma Knife Radiosurgery ◽  
Low Radiation Dose ◽  
Acoustic Schwannoma
Sign in / Sign up

Export Citation Format

Share Document