DIAGNOSTIC YIELD OF IN VITRO VITREOUS BIOPSY FOR INTRAOCULAR LYMPHOMA AT VARIABLE VITREOUS CUTTER SPEEDS USING 25-GAUGE VITRECTOMY

Author:

Tekumalla Sruti1,Xu David2,Awh Katherine3,Philp Nancy3,Milman Tatyana34,Garg Sunir2

Affiliation:

1. Thomas Jefferson University Sidney Kimmel Medical College;

2. MidAtlantic Retina, the Retina Service of Wills Eye Hospital;

3. Department of Pathology, Anatomy, & Cell Biology, Thomas Jefferson University; and

4. Wills Eye Hospital Department of Pathology, Philadelphia, Pennsylvania.

Abstract

Purpose: Primary vitreoretinal lymphoma is the most common intraocular lymphoproliferative disorder. We evaluated the diagnostic yield of pars plana vitrectomy, specifically using modern high cut rate dual-cycle cutters, on in vitro cell viability and diagnostic yield. Methods: Human Burkitt lymphoma cell line Namalwa at 2 x 10^5 cells/mL was aspirated by 25-gauge dual-blade guillotine-type vitrectomy at five speeds (500, 1,000, 4,000, 7,500, or 15,000 cuts per minute). Cell viability and diagnostic yield in each subtype group were determined using hemocytometry, viable cell count using Cell Counting Kit-8, and pathologist-guided manual count. Results: No significant deviation in cell count was identified in any cut rate by ANOVA (P = 0.61), and no trends in the number of viable cells were identified across cut rates (R2 = 0.188, P = 0.47). Among histologic cell counts per cut-rate, neither linear regression (R = 0.531, P = 0.16) nor ANOVA (P = 0.096) were statistically significant. Conclusion: There was no significant degradation in the number of viable cells with increasing cut speed. These results suggest that in contrast to previous findings using 20g or 23g vitrectomy for diagnostic vitrectomy, modern vitrectomy systems may be used at up to 15,000 cpm without compromising the viability of lymphoma cells.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Ophthalmology,General Medicine

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