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Table 1 Clinical characteristics and treatment of patients

From: Long-term follow-up after stereotactic radiosurgery of intracanalicular acoustic neurinoma

Patient characteristics

 Total no. of patients

49

 Gender (m:f)

28 : 21

 Recurrent iAN

4 (8.2%)

 Age (years)a

54 (20;77)

 Tumor volume (cm3)a

0.24 (0.1;0.68)

 Mean follow-up (months)a

65 (4;239)

Initial Symptoms and Signs

 Hearing loss

6 (12.2%)

 Hearing disturbance (%)

40 (81.6%)

  - Serviceable

29 (59.2%)

  - Non-serviceable

11 (22.4%)

Vertigo (%)

17 (34.7%)

Imbalance (%)

10 (20.4%)

Tinnitus (%)

22 (44.9%)

 CN VII impairment (%)

4 (8.2%)

Duration of symptoms

 Appearance of symptoms leading to SRS months)a

42.3 (4;182)

 First MRI (diagnosis) to SRS (months)a

19.9 (2;153)

  - Group Aa

34 (9;134)

  - Group Ba

4 (2;6)

Radiation parameters

 LINAC (1993–2012)

38

 CK (2013–2015)

11

 Marginal dose (Gy)a

12.6 (11;14)

 Dose prescription, isodose (%)a

75 (47;86)

 Coverage (%) LINACa

97.8 (91.1;100)

 Coverage (%) CKa

98.7 (94.8;100)

  1. If marked with adata is given as mean. Range is given in brackets