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Biomedical subjects

R L Schapiro

Publications and source records attributed to R L Schapiro.

At least 19 recordsLinked to original sources
PubMed1988

Latissimus dorsi cardiomyoplasty: radiographic findings.

Left latissimus dorsi muscle cardiomyoplasty is a surgical procedure in which the muscle is mobilized as a pedicled flap, moved into the left pleural and mediastinal cavities, and used for surgical repair and/or mechanical augmentation of a failing left ventricle. Chest radiographs in four patients who had undergone this procedure were evaluated. In all four patients, there was bandlike or diffuse increase in density in the left midhemithorax with loss of the left heart border. These findings, which could be misinterpreted as lung disease, represent the transposed muscle flap. CT showed the exact anatomic position of the flap in relation to the intrathoracic structures. Familiarity with the postoperative radiographic appearance of this type of myoplasty is important to avoid misinterpretation.

Aged↗
PubMed1987

Magnetic resonance imaging appearance of primary squamous cell carcinoma of the breast.

Primary squamous cell carcinoma is a rare form of carcinoma of the breast. This article reports on two such lesions with their appearance in magnetic resonance imaging and reviews the scant English literature of the past 10 years. Most of these tumors are circumscribed and have areas of necrosis. The prognosis in patients with this disease is the same as that of adenocarcinoma of the same size and stage.

Aged↗
PubMed1986

Magnetic resonance imaging in the diagnosis of breast disease.

Magnetic resonance imaging (MRI) of the breast was performed in 10 volunteers and 102 women with suspected breast disease, using a 0.35-T superconducting magnet. All patients had prior x-ray mammography. MRI was superior to mammography in differentiating solid from cystic lesions and equivalent to mammography in providing information regarding different parenchymal patterns. Of 21 surgically proven carcinomas of the breast, MRI correctly identified 18 and mammography identified 19. The major disadvantage of MRI is its inability to show calcifications, benign or malignant. Future studies will be needed to show the relative values of sonography and MRI in detecting small cysts. In addition, MRI in future should be able to demonstrate small, noncalcified masses in mammographically dense, fibrocystic breasts.

Adenofibroma↗
PubMed1986

MRI in the detection of malignant infiltration of bone marrow.

Magnetic resonance imaging (MRI) at 0.35 T with a superconductive magnet was performed on 80 patients with known or suspected malignant disease of the bone marrow. The group comprised 50 patients with known primary malignancy and 30 with known multiple myeloma. The MRI scan was correlated with plain films and radionuclide bone scans. In 40 patients with suspected metastatic disease, areas of decreased signal intensity on T1-weighted spin-echo images were observed. Ten patients had no MRI evidence of metastasis, and the abnormalities suspected on bone scanning were shown to be due to other causes. All the myeloma patients had abnormalities demonstrated by MRI. This was significant, since most had normal bone scans. All diagnoses were confirmed by needle biopsy. MRI was shown to be a sensitive method of detecting areas of malignancy within the bone marrow toward which biopsy could be directed.

Bone Marrow Diseases↗
PubMed1977

Nuclide imaging and computed tomography in cerebral vascular disease.

This report presents our experience with computed tomographic and radionuclide scans in 224 patients with ischemic or hemorrhagic infarcts or intracerebral hematomas secondary to cerebral occlusive vascular diseases. The results vary according to the site of vascular occlusion. The radionuclide angiograms and static scintigrams show four distinct patterns in cases of occlusion of the middle cerebral artery. Computed tomographic scans exhibit less variation in appearance and have a higher sensitivity in cases of recent ischemic infarction. The "tentorial confluence sign" is an important finding on static scintigrams in patients with occipital infarction; if this sign is not present, this diagnosis should be suspect. Earlier reports have established the value of computed tomography and radionuclide scans in the evaluation of cerebral infarction. In individual cases, however, each of these modalities may render nondiagnostic or false negative findings; combining both both types of examinations and comparing results yield a greater likelihood of an accurate diagnosis of cerebrovascular disease. Computed tomography is clearly more valuable than radionuclide scans in the diagnosis and follow-up of hemorrhagic infarcts or parenchymal hematomas.

Aged↗