[MR imaging of bone metastasis].
One hundred and three patients with known malignancy and suspected bone metastasis underwent magnetic resonance imaging. In 93%, the metastatic lesions, detected both on plain films and radionuclide bone scans, showed decreased signal intensity on T1-weighted images and increased signal intensity on T2-weighted images. All lesions, except one lesion showing much blastic change on plain films, showed contrast enhancement with Gd-DTPA administration. Although further investigation is needed, a correlation between the type of primary malignancy and the signal intensity of the metastatic lesion is suggested. Among 312 metastatic lesions detected by MR imaging, 272 lesions (87%) and 134 lesions (40%) were also detected by radionuclide bone scans and plain films, respectively. In five cases, MR imaging clearly revealed the lesion compressing the spinal cord, which helped us formulate a therapeutic plan. We conclude that MR imaging is the most sensitive examination for detecting bone metastasis and is necessary for planning treatment.
Koyama
M
M
Department of Radiology, Tenri Hospital.
Kuroda
Y
Y
Sano
A
A
Nishizawa
S
S
Murakami
M
M
Miyamoto
S
S
Ando
K
K
Maruta
T
T
Ishikura
S
S
Matsumoto
S
S
D001859:Bone Neoplasms / Q000175:diagnosis* / Q000556:secondary*; D001943:Breast Neoplasms / Q000473:pathology; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D011471:Prostatic Neoplasms / Q000473:pathology; D012888:Skull Neoplasms / Q000175:diagnosis / Q000556:secondary; D013125:Spinal Neoplasms / Q000175:diagnosis / Q000556:secondary; D014594:Uterine Neoplasms / Q000473:pathology