Intramuscular metastasis from malignant melanoma: MR findings.
We present a rare case of intramuscular metastasis from malignant melanoma. The lesion showed intermediate to high signal intensity on T1-weighted magnetic resonance (MR) images and mixed signal intensities containing high and low signals on T2-weighted images. The signal intensity on T1-weighted images, which is due to the paramagnetic effect of melanin, is a characteristic MR finding of this entity.
Yoshioka
H
H
Department of Radiology, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan.
Itai
Y
Y
Niitsu
M
M
Fujiwara
M
M
Watanabe
T
T
Satomi
H
H
Otsuka
F
F
D006801:Humans; D008207:Lymphatic Metastasis; D008279:Magnetic Resonance Imaging; D008297:Male; D008545:Melanoma / Q000175:diagnosis* / Q000473:pathology / Q000556:secondary*; D008875:Middle Aged; D019042:Muscle Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000556:secondary*; D012878:Skin Neoplasms / Q000473:pathology*; D013848:Thigh