Journal List > J Korean Ophthalmol Soc > v.54(2) > 1009558

Sung, Oh, Ko, and Yoon: Clinical Features and Results of Steroid Therapy for Orbital Inflammatory Pseudotumor

Abstract

Purpose

To evaluate the clinical features and treatment outcomes of steroid therapy for orbital inflammatory pseudotumor.

Methods

Sixty-four patients diagnosed with orbital inflammatory pseudotumor were reviewed retrospectively. Patients with a follow-up period of less than 6 months were excluded from the study. The pseudotumor was classified into myositic, lacrimal, anterior, diffuse, or apical type according to orbital computed tomography findings. All patients were initially treated with systemic corticosteroids and evaluated for response to the treatment. Treatment outcome was considered a “success” if the patient had complete relief of symptoms with no recurrence, and a “failure” if the patient had no or only partial relief of symptoms or showed relapse. Factors affecting the treatment outcome were analyzed.

Results

The most frequent lesion subtype was myositis. Periorbital edema was the most common symptom and was evident in 53.1% of the patients. Thirty-eight patients (59.4%) showed treatment success. Age, sex, bilaterality, and mean follow-up length did not correlate with the treatment outcome. A short interval from symptom onset to treatment time and apical subtype were significantly associated with good steroid response (p < 0.05).

Conclusions

In orbital inflammatory pseudotumor, myositis was the most common subtype. A short interval from symptom onset to treatment time and apical subtype were associated with good steroid response.

References

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Figure 1.
Frequency of signs and symptoms of orbital inflammatory pseudotumor.
jkos-54-185f1.tif
Figure 2.
Characteristics of orbital myositis. (A) Site of involvement. (B) Number of muscle involved. M RM = medial rectus muscle; SRM = superior rectus muscle; LRM = lateral rectus muscle; IRM = inferior rectus muscle.
jkos-54-185f2.tif
Table 1.
Demographics of 64 patients with orbital inflammatory pseudotumor
Discription
Age (years) Mean ± SD 49.50 ± 17.74
  Range 9-84
Sex Male 34 (53.1%)
  Female 30 (46.9%)
Laterality Unilateral 57 (89.1%)
  Bilateral 7 (10.9%)
Classification Myositis 22 (34.4%)
  Lacrimal gland 17 (26.6%)
  Anterior 10 (11.8%)
  Diffuse 6 (7.1%)
  Apical 9 (10.6%)
Interval between symptom onset and Mean ± SD 27.21 ± 49.95
treatment (days) Range 2-365
Follow up duration (months) Mean ± SD 14.48 ± 13.33
  Range 6-52

SD = standard deviation.

Table 2.
Mean age, interval between symptom onset and treatment and follow up duration of different subtypes
Age (years) Interval between symptom onset and treatment (days) Follow up duration (months)
Myositis 44.41 ± 17.55 25.50 ± 40.14 14.68 ± 13.74
Lacrimal gland 48.24 ± 14.24 45.41 ± 83.36 17.71 ± 17.32
Anterior 53.50 ± 20.82 18.70 ± 12.95 13.70 ± 11.59
Diffuse 49.67 ± 22.98 13.83 ± 8.59 8.67 ± 6.53
Apical 59.78 ± 15.30 15.44 ± 13.95 12.67 ± 8.59
p-value* 0.230 0.230 0.632

Data are expressed as mean ± standard deviation (SD).

* Kruskal-wallis test.

Table 3.
Univariate analysis for factors affecting outcome of systemic steroid treatment in patients with orbital inflammatory pseudotumor
Variables Number of patients (%) p-value
Treatment success group Treatment failure group
Age, Mean ± SD (years) 48.84 ± 19.11 50.46 ± 15.84 0.713*
  0.924
Sex
Male 20 (58.8) 14 (41.2)
Female 18 (60) 12 (40)
  0.035
Laterality
Unilateral 31 (54.4) 26 (45.6)
Bilateral 7 (100) 0 (0)
  0.036
Classification
Myositis 11 (50) 11 (50)
Lacrimal gland 10 (58.8) 7 (41.2)
Anterior 8 (80) 2 (20)
Diffuse 1 (16.7) 5 (83.3)
Apical 8 (88.9) 1 (11.1)
Interval between symptom onset and treatment
Mean ± SD (days) 16.68 ± 11.76 42.62 ± 75.29 0.045*
Follow up duration
Mean ± SD (months) 15.68 ± 13.67 12.73±12.87 0.393*

SD = standard deviation.

* Student t-test;

Chi-square test.

Table 4.
Multivariate analysis for factors affecting outcome of systemic steroid treatment in patients with orbital inflammatory pseudotumor
Variable Odds ratio 95% CI p-value*
Laterality
Unilateral 1.000
Bilateral 0.035 0.001-1.026 0.055
Classification 0.124
Myositis 1.000
Lacrimal gland 0.565 0.121-2.634 0.467
Anterior 0.348 0.049-2.470 0.291
Diffuse 4.325 0.400-46.754 0.228
Apical 0.087 0.008-0.992 0.049
Interval between symptom onset and treatment 1.054 1.004-1.105 0.033

CI = confidence interval.

* Multivariate logistic regression analysis.

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