Mucosa-associated lymphoid tissue lymphoma of the third eyelid conjunctiva in a XXXX .

@entity19139 @entity5 @entity1074 @entity235 @entity1892
A 4-year-old, neutered female Cocker Spaniel was presented to the veterinary clinic for protrusion of the left third eyelid. When the third eyelids from both eyes were everted, lobulated masses were present on the bulbar surface. The left third eyelid had a larger protrusion. There was no apparent associated ocular or systemic involvement. The @entity5 of left third eyelid was removed and referred for histological examination. Histologically, there were proliferations of lymphoid follicles surrounded by lymphoid cells forming a marginal zone. Those lymphoid cells occasionally infiltrated into conjunctival epithelium. A few apoptotic bodies with karyopyknotic and karyorrhexic nuclei were observed in the germinal center of lymphoid follicles. Mitotic figures were rare. On immunohistochemistry, @entity5 cells expressed @entity19139 but not CD3. A diagnosis of extranodal marginal zone @entity1892 ( @entity1074 ) of the third eyelid was established based on the histological and immunophenotypical features. At the 1-year follow-up, there was no evidence of recurrence of the mass at the area of excision of the left third eyelid and the remaining @entity5 of the right third eyelid was still a similar size. The @entity235 still showed no significant findings, except those of the @entity5 , and no evidence of systemic involvement. To the authors' knowledge, this is the first reported case of @entity1074 of the third eyelid in a @entity235 .
