[The clinicopathologic observation of eosinophilic hyperplastic lymphogranuloma in the orbit]

To improve the knowledge of the clinicopathologic features of eosinophilic hyperplastic lymphogranuloma (Kimura disease) in the orbit.

It was a retrospective case series study. The clinical and pathological characteristic of 9 cases of Kimura disease from the pathology department of Tianjin Eye Hospital were reviewed, immunohistochemical staining was performed, including for CD20, D79a, CD3, CD45Ro, CD34, Ki67 and IgE.

In the 9 cases, 7 cases were male, 2 cases were female; the age of onset were from 13 to 62 years, medium age was 25 years; 7 cases were simple, 2 case were bilateral orbit. These lesions occurred in the superior or superotemporal quadrant of the orbit and the majority of cases extended into deep orbital tissues, 6 cases involved the lacrimal gland, 5 case involved the lateral rectus muscle. The clinical features mainly included lid swelling, eye redness, proptosis and palpable mass, and the disease course ranged from 6 months to 15 years. 3 lymph node enlargements in the submandibular regions and 1 subcutaneous nodule on the bilateral elbow were found in one case. The documentation of peripheral-blood eosinophilia (11% - 14%) was found in 3 cases. The pathological characteristics of Kimura disease were lymphoid tissue hyperplasia with prominent lymphoid follicles, conspicuous eosinophils infiltration and capillary proliferation. Immunohistochemical study in our cases revealed B cells in lymphoid follicles and mostly T cells in the interfollicular regions.

Kimura disease of orbit is an uncommon lymphoid hyperplasia with prominent eosinophils infiltration and capillary vessels, which commonly occur superotemporal quadrant of the orbit, easy to involve lacrimal gland and lateral rectus muscle.