A 76-year old man with a history of bilateral lacrimal gland masses and an otherwise unremarkable ocular examination underwent left orbital biopsy at another institution. Clinical suspicion was high for possible lymphoma due to the additional presence of cervical and axillary lymphadenopathy. The histologic diagnosis at that time was reactive lymphoid hyperplasia with fibrosis. Immunohistochemistry, kappa/lambda in situ hybridization, and flow cytometry were negative for lymphoma. The patient was lost to follow-up without any further work-up. He presented a year later due to recurrence of orbital inflammation, at which point the surgeon requested histologic work-up for IgG4-related disease. The slides from the prior orbital biopsy were requested and reviewed, showing lymphoid follicles with intervening bands of fibrosis and mixed chronic inflammatory cells. The tissue block was also received, and additional sections were cut for CD138 and IgG4 immunostaining. There were at least 150–180 IgG4-positive plasma cells per high-power field, comprising over 40 % of the total plasma cell population (as assessed by CD138). (Serum IgG4 was not obtained.) This was considered consistent with IgG4-associated orbital inflammatory pseudotumor with sclerosing features. The patient was initially treated with prednisone and then transitioned to intravenous rituximab as first-line therapy and had an excellent response with no recurrence at 2 years following therapy.
A 23-year-old Indian female presented to a tertiary institute of Northeast India with the chief complaints of dimness of vision, pain and redness in the right eye (OD) for 3 months. The patient was previously treated elsewhere with two posterior sub-Tenon injections of triamcinolone acetonide given 6 weeks apart. She was also on topical steroids and cycloplegic. She did not report any benefit from the previous treatment. There was no history of trauma to the eye or elsewhere. Other medical, surgical, and family histories were unremarkable.\nOn examination, ocular alignment was normal with a visual acuity of counting finger at 3 m in the OD. There was minimal sclerouveitis noted in the inferior-temporal quadrant of OD. On slit-lamp examination, OD showed 360° posterior synechiae with anterior chamber flare and cells (+++) with 1 mm hypopyon []. There was a suspected mass in the inferior-temporal quadrant behind the iris, pushing it anteriorly. The left eye examination was unremarkable.\nB-scan ultrasound (B-scan USG) of OD was suggestive of ciliary body mass with adjoining exudative retinal detachment (ERD). USG bio-microscopy findings were consistent with the findings of B-scan USG. The patient was advised with complete blood count with peripheral blood smear which was within normal limit. Syphilis screening (venereal disease research laboratory) was nonreactive with normal thyroid function test and negative Mantoux test (5TU) reading. Based on the clinical examination and baseline investigations, we came to the differential diagnosis of ciliary body melanoma or similar tumors. Magnetic resonance imaging suggested the possibility of ciliary body melanoma in OD [Fig. and ]. After obtaining informed consent, enucleation was carried out in OD, and eyeball specimen was sent to ocular pathology laboratory for histopathological analysis. In grossing, there was a grayish-white-colored tumor seen in the inferior-temporal part of the ciliary body measuring (10.99 × 7.98) mm. Adjoining the grayish-white ciliary body mass, there was an ERD noted [].\nMicroscopic description of enucleated eyeball showed peripheral corneal vascularization. Few inflammatory cells were seen in the anterior chamber []. Part of the iris tissue showed inflammation. An eosinophilic mass was seen in the ciliary body with diffuse plasmacytoid cells, with reactive lymphoid follicle and other inflammatory cells []. Episcleral and scleral tissue were inflamed and infiltrated by various inflammatory cells [Fig. and ]. Occasional vascularization of the sclera was noted []. Cut end of the optic nerve did not show any tumor involvement. Immunohistochemistry (IHC) was advised to explore the possibility of various inflammatory lesions. The steps for IHC were carried by kit methods available commercially.\nIHC for both Kappa and Lambda was positive. Cluster differentiation (CD20, CD3, and CD45) was focal-positive. CD138 was positive in the specimen and HMB45 was negative. IHC for IgG4 was positive in occasional cells which also expressed CD138 (plasma cells). All positive controls showed appropriate positive immunostaining. Negative control slide did not show immunostaining. IgG4-positive plasma cells were seen in high-power field in the documented slides. Nearly, 30% of all the CD138 positive plasma cells were found to be IgG4-positive [].\nProtein chemistry revealed hypergammaglobulinemia with higher levels of total protein and gamma fraction. No myeloma band or Bence Jones protein was detected []. Serum IgG4 levels were also elevated. A hematologist was consulted, and bone marrow examination revealed mild anemia, for which she was given supportive treatment. In the postoperative period, the patient was given a course of oral steroids. On follow-up at 6 weeks, she was given prosthesis in OD, and the patient was doing well till her last review.