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Biomedical subjects

G Morillo

Publications and source records attributed to G Morillo.

14 recordsLinked to original sources
PubMed1991

Imaging of intra- and extraabdominal desmoid tumors.

Desmoid tumors are characterized by proliferation of fibroblastic cells that arise from the fascia or aponeurosis of muscle. They are most commonly found in the abdomen of adults, arising from the anterior abdominal wall, mesentery, or retroperitoneum. At sonography, desmoids have variable echogenicity, with smooth, well-defined margins. On contrast-enhanced computed tomographic scans, the tumors are generally high attenuation (relative to muscle) and have either ill- or well-defined margins. At magnetic resonance imaging, desmoids have low signal intensity relative to muscle on T1-weighted images and variable signal intensity on T2-weighted images. There are no specific imaging features to distinguish desmoid tumors from other solid masses. The diagnosis of desmoid tumor should be considered in patients with an abdominal mass, a history of abdominal surgery or injury, or Gardner syndrome.

Abdominal Neoplasms↗
PubMed1989

The CT appearance of cystic masses of the liver.

The authors here discuss twelve discrete pathologic entities that they found, in a review of over 500 abdominal CT scans, caused the appearance of a cystic lesion in the liver. The CT characteristics of the various lesions are illustrated, differential points in the patients' histories are noted, and gross and microscopic pathology specimens are correlated with the CT appearances to explain the CT findings. Lesions considered include: simple (bile duct) cyst, adult polycystic kidney disease, Caroli disease, pyogenic abscess, echinococcal cyst, amebic abscess, metastasis, biliary cystadenoma and cystadenocarcinoma, hepatocellular carcinoma, cholangiocarcinoma, biloma, and extrapancreatic pseudocyst.

Carcinoma, Hepatocellular↗
PubMed1987

Hemangioma of the liver: heterogeneous appearance on T2-weighted images.

We reviewed the gross photographs of 19 patients with hemangioma of the liver. On cut sections, all 19 tumors were inhomogeneous. In 17 cases (89%) there were areas of predominantly central fibrosis. Lobulations were present in 10 cases (53%). Areas of thrombosis (nine cases), calcification (four cases), and hemorrhage (four cases) were also present. We also reviewed 15 hemangiomas of the liver in 12 patients studied by MR imaging. Gross photographs and MR scans were available in three hemangiomas, thus allowing direct radiologic-pathologic correlation. Twelve (80%) of the hemangiomas were inhomogeneous on T2-weighted images and three (20%) were homogeneous. Other characteristics were sharp margins in all 15 cases (100%), lobulations in 11 cases (73%), peripheral location in 10 cases (67%), and internal septations in four cases (27%). We concluded that (1) hemangiomas of the liver are frequently inhomogeneous on cut sections; (2) heterogeneity in T2 images is commonly seen and should not exclude hemangioma; and (3) other signs, such as sharp margins, lobulated contour, and peripheral location, may be helpful in the MR diagnosis of hemangioma of the liver.

Hemangioma↗
PubMed1986

Renal cell carcinoma complicating long-term dialysis: computed tomography-guided aspiration cytology.

The diagnosis of renal cell carcinoma was established by computed tomography-guided aspiration in two small solid lesions occurring in end-stage kidneys. This represents a safe means of providing more specific information about the various lesions that specific information about the various lesions that frequently develop in chronic hemodialysis patients: complex cysts, adenoma, and renal cell carcinoma. The proposed conservative approach of simple observation of these lesions may be altered if a precise diagnosis is obtained. Computed tomography is considered the most reliable imaging modality for evaluation and guided aspiration.

Adult↗
PubMed1986

Review of computed tomography findings in thrombosis of the major abdominal venous pathways.

Computed tomography is commonly the first diagnostic modality to detect venous thrombosis. The relatively constant location and anatomic relations of the major abdominal veins allow for their proper recognition and differentiation from other tubular structures. Whether the occlusion is secondary to blood clot or tumor extension, the vessels demonstrate a characteristic appearance. The presence of adjacent tumor mass is the single most important factor to differentiate the two types of thrombi. Invaluable aid is provided by computed tomography in the management of this clinical situation. Uncommonly, the diagnosis remains unclear and venography must be done. Selected examples of major abdominal venous thrombosis are presented.

Abdomen↗
PubMed1979

Pathologic vascularity of renal angiomyolipoma: cast corrosion and angiographic study.

Angiomyolipomas of the kidney at times have been preoperatively identified by the interlobar or interlobular artery eneurysms in the early vascular phase of renal arteriograms. A case report is presented in which a plastic cast corrosion technique was used postnephrectomy to demonstrate the presence of aneurysms identified angiographically prior to surgery. Portions of a cast corrosion model of a hypernephroma are also exhibited to compare and contrast pathologic vascular features of both types of tumors.

Adult↗
PubMed1979

The role of computed tomography in the diagnosis of renal and perirenal abscesses.

Computed tomography was done on 4 patients suspected of having an intrarenal or perirenal abscess based on clinical grounds and an abnormal excretory urogram. Intrarenal abscesses with perinephric extension were demonstrated in 3 patients and a solitary perinephric abscess was demonstrated in 1. Computed tomography is a valuable tool in the diagnostic study of suspected intrarenal and perirenal abscesses because not only can the primary abscess be shown but also its possible extrarenal extension.

Abscess↗
PubMed1979

Retrocaval ureter: report of 8 cases and the surgical management.

We present 8 cases of retrocaval ureter, one of which concerns a unique periureteral venous ring formed by the persistence of the right posterior cardinal vein along with a normal vena cava. Current radiographic concepts are reviewed and the importance of inferior venacavography in the preoperative evaluation for correction of the retrocaval ureter is emphasized.

Adolescent↗
PubMed1979

The differential diagnosis of the unilateral small kidney.

Although it is frequently possible to determine the cause of an unilateral small kidney, there are cases where the renal damage is so advanced, or the interference to growth and maturation so extensive, that the etiology cannot be established. High-dose urography with tomography during the nephrographic phase are required for a confident diagnosis. Ureteral compression should be used to improve calyceal visualization. This technique can be adapted for children. Complementary diagnostic procedures are often needed, both in adults and in children. We cannot emphasize enough the need for clinical correlation and comparision with previous examinations.

Adult↗
PubMed1979

[Modern urography].

An IVP optimum quality should be tailored to the particular needs of a given case and consequently most be supervised by the radiologist when it is being performed. The most meticulous technique is needed, the adequate amount of contrast medium should be used, compression of the ureters should be performed and under optimum conditions tomography during the nephrographic phase should be performed whenever the circumstances should require it. With only very few exceptions no significant differences between different contrast media exist. The use of medium speed high contrast x-ray films as well as the use of rare earth intensifiers screens avoid the need for extremely powerful generators that are very costly. Film processing is a critical step in obtaining a good study and should be automatic.

Contrast Media↗
PubMed1978

Unusual complications of renal cyst puncture.

The authors present a case of subcapsular hematoma with compromise of renal function and a case of arteriovenous communication as two infrequent complications of renal cyst puncture.

Aged↗
PubMedDate not supplied

Comparison of CT and MR imaging in musculoskeletal neoplasms.

Magnetic resonance (MR) and CT of 50 musculoskeletal neoplasms were compared to investigate the relative values of these modalities in the assessment and staging of musculoskeletal neoplasms and to determine how often they are complementary and when they are redundant. The material included 25 benign and 25 malignant neoplasms, of which 33 were skeletal and 17 were of soft tissue origin. Magnetic resonance was superior to CT with respect to all morphologic criteria except for cortical bone destruction, calcification, ossification, and the assessment of lytic and sclerotic changes in flat bones. Magnetic resonance was found to be complementary to CT in 48% of the cases (30% malignant, 18% benign). Use of both MR and CT was considered redundant in 52% of the cases (20% malignant, 32% benign). Magnetic resonance was found to be the modality of choice for all benign and malignant soft-tissue neoplasms. Both modalities are complementary and necessary for complete evaluation of malignant skeletal tumors. Benign skeletal tumors should be considered for evaluation by CT, MR, or both on an individual case basis.

Adolescent↗