Orbital and adnexal lymphomas. A multiparameter approach

Area of Science:

• Ophthalmology
• Oncology
• Pathology

Background:

• Accurate diagnosis of lymphoid lesions in the orbit and adnexa is challenging.
• Morphologic diagnosis of lymphomas relies on specimen quality, fixation, and processing.
• Immunologic characterization is a crucial parameter for lymphoproliferative disorders.

Purpose of the Study:

• To investigate the utility of immunologic, cytochemical, and electron-microscopic techniques in diagnosing orbital lymphoid lesions.
• To enhance diagnostic accuracy for malignant lymphoma in challenging referral cases.
• To evaluate the prognostic implications of primary orbital lymphomas.

Main Methods:

• Application of immunologic, cytochemical, and electron-microscopic techniques.
• Analysis of five challenging referral cases of orbital lymphoid lesions.
• Morphologic assessment combined with advanced diagnostic parameters.

Main Results:

• These advanced techniques improved diagnostic accuracy for malignant lymphoma.
• Plasma-cytoid lymphocytic lymphoma can mimic reactive inflammatory processes, leading to false-negative diagnoses.
• All reported malignant lymphoma cases were stage I or II.

Conclusions:

• Immunologic characterization is a highly useful diagnostic parameter for orbital lymphoproliferative disorders.
• Failure to recognize specific lymphoma subtypes can result in misdiagnosis.
• Primary orbital lymphoma appears to have a favorable prognosis, particularly in early stages.