The Journal of the Arkansas Medical Society Issue 5 Volume 115 | Page 16

Table 4.1
Orbital Lesions Found
in Ages 19-39 (N=24)
Table 4.2
Number of
Lesions Percentage
Dermolipoma 2 8.3%
Hemangiopericytoma 2 8.3%
Abcess 2 8.3%
AVM 1 4.1%
Blastocystis 1 4.1%
Cavernous Hemangioma 1 4.1%
Chronic Dacroadenitits 1 4.1%
Conjunctival Cyst 1 Chronic Fibrosingdacryoadenitis
Gender Breakdown of Orbital
Lesions Found in Ages 19-39
Number Percentage
Females 17 70.8%
Males 7 29.2%
Number Percentage
Caucasian 15 62.5%
4.1% AA 5 20.8%
1 4.1% Hispanic 3 12.5%
Dermoid Cyst 1 4.1% Indian 1 4.1%
Epidermal Cyst 1 4.1% Epidural Abcess 1 4.1% MALT Lymphoma 1 4.1% Metastaic Mucoepidermoid Carcinoma 1 4.1% Number Percentage
Pleomorphic Adeoma 1 4.1% Right 16 66.6%
Recurrent Lymapthic Malformation 1 4.1% Left 7 29.1%
Sarcoidosis 1 4.1% Bilateral 1 4.1%
Squamous Cell Carcinoma 1 4.1% Small Non-necratizing Granuloma 1 4.1% Solitary Fibrous Tumor 1 4.1% Number Percentage
Venous Malformation 1 4.1% Lacramal Gland 5 20.8%
Superotemporal 4 16.7%
Lateral 3 12.5%
Medial 2 8.3%
Inferotemporal 2 8.3%
Unknown 2 8.3%
Intraconal 2 8.3%
Superomedial 2 8.3%
Inferior 1 4.1%
Superior 1 4.1%
cal confirmation, and, studied the incidence of these lesions. The most
common lesion types were cystic lesions, comprising 25.4% of all lesions.
This finding was consistent with similar studies. 2 The next most common
lesions in our study were inflammatory lesions, followed by lacrimal, and
lymphoid or leukemic lesions.
Of specific interest in this study was the characterization of tumor
type by age. For the zero-to-18-year-old age group, the most common
orbital lesion was the dermoid cyst. This is consistent with data reported
in studies conducted by both Kennedy and Rootman. 2,4,7 Langerhans cell
histiocytosis was another common orbital lesion in the pediatric age group
making up 6.1% of lesions. This pathology is much more common in pe-
diatric patients and thus is an important characterization in the work up of
pediatric patients with orbital masses. It has been found that up to 22% of
the orbital Langerhans cell histiocytosis in pediatric patients are malignant,
reinforcing the need for prompt diagnosis and initiation of work up 9.
In the 19-to-39-year-old age group, the frequency of orbital masses
was much more homogenous. Of note, it is surprising that a hemangio-
pericytoma was one of the most common lesions in this age group in our
series because it is a relatively rare lesion as reported in the literature. The
orbit is a rare location for this tumor, with hemangiopericytoma making up
0.8% to 3% of all primary orbital tumors. 10 However, there are only two of
these in the whole study and they happened to both fall in this age group,
and this is also the age group that had the least amount of lesions. When
112 • THE JOURNAL OF THE ARKANSAS MEDICAL SOCIETY
Table 4.3
Race Breakdown of Orbital
Lesions Found in Ages 19-39
Table 4.4
Laterality Breakdown of Orbital
Lesions Found in Ages 19-39
Table 4.5
Orbital Location of Orbital
Lesions Found in Ages 19-39
considering all age groups, Hemangiopericytomas only make up 1.4% of
the masses found within the study; this is within the range reported in the
literature. Within this age group, orbital lesions occurred more frequently
in females (70.8%).
The 40-to-64-year-old group had a wide array of orbit lesions with
similar incidence of pathology. However, different types of lymphoid lesions
made up the bulk of the lesions in this group. Lymphomas have been re-
ported as the most frequently occurring malignant orbital tumors in adults 6 ,
which is consistent with our findings.
In the 65-plus group, the most common orbital lesion was squamous
cell carcinoma, which has been reported as the most frequent secondary
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