metastases

METASTASES

DIAPHRAGMATIC METASTASIS OF MELANOMA

A 57-year-old man with tumor recurrence at the scar of previous resection of left anterior chest wall melanoma 7 years before. A. Contrast-enhanced CT scan: low density ovoid mass in the right diaphragm compressing the hepatic parenchyma. B. T1-weighted MRI: heterogeneous tumor with high-signal intensity areas due to the presence of paramagnetic melanin. Needle biopsy confirmed the melanoma. C. Photomicrograph of needle biopsy specimen (x50, HMB 45 stain): multiple melanin pigment containing cells (arrows).

BRONCHOGENIC CARCINOMA

T1-weighted MRI shows a diaphragmatic invasion (arrow) by the right lower lobe tumor in a 45 year-old man.

DIAPHRAGMATIC METASTASIS OF THE PHARYNGEAL CARCINOMA

A 60-year-old man with a history of pharyngeal carcinoma treated 2 years before. A. Follow-up chest radiograph: round opacity in the right peridiaphragmatic area. B. Longitudinal sonogram: disruption of the diaphragm (arrows) by slightly hyperechoic irregular hepatic nodule. C. Sagittal T1-weighted MRI: low-signal intensity dumbbell-shaped mass located in the diaphragm and the liver.