Three patients suffering from extensive cavernous lymphangiomatosis ar
e presented here. They were examined by MRI using RARE-MR hydrography
(rapid acquisition with relaxation enhancement) as well as conventiona
l spin-echo sequences. RARE sequences, which depict each fluid-filled
lymphatic space, can be used for screening. RARE-sequences help to sho
rten investigation time, particularly in cases involving the skeleton.
The imaging strategy can be changed according to the results of this
sequence. It may be performed prior to spin-echo sequences and facilit
ates follow-up investigations. RARE sequences distinguish between lymp
hangiomatosis and hemangiomatosis, or a combination of the two.