[MRI features of lymphedema of the lower extremity: comparison with lymphangioscintigraphy].
OBJECTIVE
To investigate the features of chronic lymphedema of the extremity.


METHODS
Magnetic resonance imaging (MRI) and lymphangioscintigraphy (LAS) examinations were performed on 12 patients with peripheral lymphedema.


RESULTS
MRI characteristically showed diffusive subcutaneous edema, reticular lymphangiectasis and "channels" with sequestered lymph. MRI scan clearly displayed the proliferative and extended lymphatic vessels, trunks and chylocyst. LAS showed dermal diffusion (dermal backflow) or retention at the injection site of the tracer with poorly defined lymphatic trunks and delayed or no visualization of regional lymph nodes.


CONCLUSIONS
MRI can visualise peripheral lymph trunks, lymph nodes and soft tissue. LAS is more helpful in ascertaining the condition of obstruction of lymphatic system. Using these two imaging modalities together is helpful for anatomical diagnosis and delineating the disarranged pattern of lymphedema.
Liu
N
N
Department of Plastic Surgery, Chang Zheng Hospital, Shanghai 200003.
Wang
C
C
Ding
Y
Y
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003911:Dextrans; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000000981:diagnostic imaging; D008209:Lymphedema / Q000175:diagnosis* / Q000000981:diagnostic imaging; D061305:Lymphoscintigraphy; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D015609:Organotechnetium Compounds
D003911:Dextrans; D015609:Organotechnetium Compounds; C034146:technetium Tc 99m dextran