AJR. American journal of roentgenology
-
The ability of high-resolution MR imaging (1.5 T) to detect invasion of the cavernous sinuses by pituitary adenoma was determined through a retrospective review of 74 patients. These patients were divided into three groups: 25 normal subjects, 24 subjects with invasive pituitary adenomas, and 25 subjects with noninvasive pituitary adenomas. A fourth group of 30 patients, who subsequently underwent surgery for pituitary adenoma, was evaluated prospectively by MR for the presence or absence of cavernous sinus invasion. ⋯ The prospective MR evaluation of 30 patients undergoing surgery for pituitary tumor revealed a sensitivity for predicting cavernous sinus invasion of 55%, a specificity of 85.7%, a positive predictive value of 62.5%, and a negative predictive value of 81.8%. No feature permitted certain distinction between invasive and noninvasive microadenomas, as the medial dural wall of the cavernous sinus could not be reliably identified. The most specific sign of cavernous sinus invasion was carotid artery encasement.
-
AJR Am J Roentgenol · Oct 1988
Necrotizing enterocolitis: value of radiographic findings to predict outcome.
To investigate whether radiographic findings could be used to predict pan-necrosis (necrosis of 75% or more of the jejunum, ileum, and colon), we reviewed the serial abdominal radiographs and clinical records of 147 infants with necrotizing enterocolitis. Pan-necrosis occurred in 29 infants (20%) and was always fatal. The presence and degree of pneumatosis intestinalis, pneumoperitoneum and portal venous gas were studied. ⋯ Pan-necrosis was found most frequently in infants with severe pneumatosis intestinalis (56%), portal venous gas (61%), or the combination of severe pneumatosis intestinalis and portal venous gas (79%). The mortality rates in these three groups were 63%, 65%, and 86%, respectively. Thus, infants with the worst outcome (those who develop pan-necrosis) can be identified on plain films by detection of severe pneumatosis intestinalis and portal venous gas.