Occasionally malignant tumors form a parasitic relationship with surrounding organs, deriving their blood supply from vessels feeding that organ without histologic evidence of 'invasion'. Since radiopaque angiography relies upon identification of the feeding vessel to a tumor to define its location and origin, the true nature of a parasitic tumor may not be detected and a mistaken diagnosis of metastases to that organ made. This incomplete information might dissuade a surgeon from operating on a resectable tumor. In the diagnosis of malignant tumors in and around the liver, radioisotopic scintiangiography reveals filling of the tumor vessels resulting in a 'vascular blush'. In general, intrahepatic lesions associated with a vascular blush have a corresponding well defined area of decreased radioactivity on the static scintiphotograph. However, a parasitic tumor may not produce a decrease in activity on the static scintiphotograph to correspond to the vascular blush on the scintiangiogram. This would indicate that the lesion was extrahepatic and, in conjunction with the radiopaque angiogram, indicate the true nature of the lesion. This phenomenon is reported in a patient with hypernephroma. Radiopaque angiography, radioisotopic scintiangiography, and static scintiphotography were performed and resulted in the proper preoperative diagnosis.
|Original language||English (US)|
|Number of pages||3|
|Journal||Journal of Nuclear Medicine|
|State||Published - 1974|
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging