Ring lymphoma: highly indicative ultrasound biomicroscopy findings of ciliary body lymphoma.

2021 
BACKGROUND To describe the ultrasound biomicroscopy (UBM) findings of extremely rare ciliary body lymphoma. METHODS This was a retrospective noncomparative case series study. Five patients (8 affected eyes) diagnosed with ciliary body lymphoma at Peking Union Medical College Hospital from 2008 to 2019 were included. The UBM findings, including the location, height, and acoustic features, were documented to assess the tumour characteristics. RESULTS UBM in all 8 (100%) affected eyes revealed 360° ring-like, solid infiltration of the ciliary body with low and homogeneous internal reflectivity. The continuity of the tumours could be most vividly demonstrated by transverse sections. CONCLUSIONS Ciliary body lymphoma tends to grow in a characteristic circumferential 360° pattern, and the name "ring lymphoma of the ciliary body" is proposed.
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