サルコイドーシスの涙腺のMRI

Magnetic resonance imaging of lacrimal gland in and sarcoidosis

　サルコイドーシスの眼合併症のひとつとして涙腺腫大が知られている。今回我々はサルコイドーシスの確定診断のついた症例の眼窩MRIを撮像し，涙腺腫大の有無を調べ他の臨床所見との相関について検討を行った。MRI水平断像にて涙腺の幅が6mm以上であった症例は18症例中7例（38.9％）で，所見の有無に関しての相関を調べた結果，網膜血管炎の有無以外には有意な相関を認めなかった。またサルコイドーシスにおける涙腺腫大の有無はMRIにより生体で診断が可能であり臨床的意義が人きいと思われる。

We evaluated the magnetic resonance imaging (MRI) of the lacrimal gland in 18 patients with sarcoidosis. All the cases were imaged by conven-tional spin-echo technique using a 1.5T super-con-ductive MR system by General Electric. We identified enlargement of the lacrimal gland in 7 patients. The signal intensity of lacrimal glands in these cases were characterized by isointensity on T1-weighted and proton density image and by high intensity on T2-weighted images. Hilar lymphadenopathy was present in 5 of them. Other ocular disorders related to sarcoidosis were present in 15 patients. Enlargement of the lacrimal gland was correlated with retinial vasculitis and not with hilar lymphadenopathy.