Paul D. Radecki

MRI differentiation of recurrent colorectal carcinoma from postoperative fibrosis.

The potential applications of magnetic resonance imaging in the differential diagnosis of recurrent colorectal carcinoma from postoperative fibrosis are described. Correlation with computed tomographic findings is presented in 2 cases.

Staging of ureteral transitional cellcarcinoma by CT and MRI

Intravenous urography and retrograde pyelography are the primary radiologic studies for detecting ureteral carcinoma but give limited information regarding stage of disease. Computed tomography (CT) and magnetic resonance imaging (MRI) delineate the extent of ureteral carcinomas with a high degree of accuracy by depicting the periureteral fat and presence or absence of lymphadenopathy. In selected cases, CT and MRI are valuable for assessing the presence or absence of tumor in a ureteral stump and for the differential diagnosis of ureteral obstruction. Five cases of ureteral carcinoma and 2 cases of stump carcinoma are presented with preoperative CT and/or MRI evaluation and staging.

Scar sign of renal oncocytoma: magnetic resonance imaging appearance and lack of specificity

This case report illustrates the magnetic resonance imaging (MRI) appearance of a typically asymptomatic renal oncocytoma as a homogeneous mass of medium signal with a stellate central region of decreased signal, representing the central scar. The MRI was correlated with computed tomography (CT), ultrasound (US), and gross pathologic appearance. The appearance of a central scar is not specific for oncocytoma and does not exclude renal cell carcinoma, as illustrated by a second case.

Relative merits of mri, transrectal endosonography and ct in diagnosis and staging of carcinoma of prostate

Magnetic resonance imaging (MRI) and transrectal sonography of 27 patients with biopsy-proved carcinoma of the prostate were performed to compare the sensitivity of these modalities to each other for diagnosis and to computed tomography (CT) for staging. Sonography was superior to MRI for the detection of intraglandular carcinoma and capsular disruption. MRI was superior to both sonography and CT for evaluating seminal vesicle invasion, and slightly better than CT for detecting lymphadenopathy.

Magnetic Resonance Imaging Diagnosis of Budd-Chiari Syndrome

Noninvasive imaging modalities may suggest the diagnosis of Budd-Chiari syndrome but they are rarely diagnostic. Inferior vena cavography, hepatic venography, and liver biopsy, alone or in combination, are usually necessary for definitive diagnosis. Because of its excellent depiction of blood vessels as regions of absent signal, magnetic resonance imaging has the potential to make a noninvasive diagnosis of hepatic vein thrombosis. A case illustrating the usefulness of magnetic resonance imaging in the diagnosis of Budd-Chiari syndrome is presented.

Carcinoid of the intrahepatic ducts.

Carcinoid tumors of the biliary tree are rare. To the best of our knowledge, this is the first reported case of an intrahepatic ductal carcinoid and the thirteenth reported case of biliary carcinoid. The radiographic appearance is variable. A brief review of the previously described cases is presented.

Magnetic resonance imaging of papillary renal cell carcinoma

The authors report magnetic resonance (MR) studies in a case of papillary renal cell carcinoma. The preoperative ultrasound and computed tomographic scans suggested either a hemorrhagic cyst or a carcinoma, but the angiogram demonstrated avascularity. The magnetic resonance scan was more consistent with carcinoma than complicated cyst. We report the MR findings with pathologic correlation.

Case report 392

A 40-year-old woman presented with a one week history of dull, throbbing pain in her left anterior mandibular region. Extraction of three left lower molar teeth was performed and antibiotic therapy was instituted. Pain and swelling of the mandibular region persisted and three months later a periodontal abscess was drained. With a second course of antibiotic therapy, the pain and swelling greatly

Color Doppler detection of a breast perilobular hemangioma.

The patient was a 14 year old gravida 0 para 0 woman whose presenting sign was a 20 month history of bloody nipple discharge from the right breast. The first episode occurred at age 12 112, two months before menarche. The patient described intermittent sharp pain in the lower outer aspect of the right breast, followed several minutes later by bright red blood oozing from the nipple. Initially the nipple discharge was sporadic, occurring once every several months. The amount of bleeding prompted the patient to seek surgical consultation. Six months after the first episode of bleeding, the patient underwent a blind retroareolar biopsy. Histopathologic findings were consistent with ductal hyperplasia. Mild capillary proliferation was noted at that time. The patient had no further episodes of bleeding until 1 year later. At this time, a right retroareolar mass

Impact of magnetic resonance on staging of renal carcinoma

Computerized tomography (CT), ultrasound, and angiography have been used for staging renal cell carcinoma. CT has proven to be the most reliable and sensitive of these techniques. Magnetic resonance (MR) has emerged recently as a viable alternative imaging modality. Five patients with renal cell carcinoma and suspected caval involvement were evaluated by CT, ultrasound, and MR. Caval extension and the differentiation of intra-versus retrocaval tumor was seen with greater clarity on MR scans; perinephric extension was seen equally well with both modalities. The primary tumor itself was better defined with CT. In patients with equivocal findings regarding the renal veins or inferior vena cava, MR is a valuable adjunct in preoperative evaluation. In patients at high risk for contrast administration, MR is the staging modality of choice.