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Biomedical subjects

S C Efremidis

Publications and source records attributed to S C Efremidis.

At least 37 records · Page 2Linked to original sources
PubMed1996

Distal ileocolic intussusception: another cause of inversion of superior mesenteric vessels in infants.

OBJECTIVE: Inversion of the superior mesenteric vessels is associated with various conditions. The purpose of this study was to prospectively evaluate the position of these vessels in infants with idiopathic ileocolic intussusception. SUBJECTS AND METHODS: Abdominal sonography was performed before and after reduction of ileocolic intussusception in 16 infants. RESULTS: In 14 infants with ileocolic intussusception proximal to the splenic flexure, the relationship of the superior mesenteric vessels was normal (superior mesenteric vein to the right ventral side of superior mesenteric artery). Inversion of the superior mesenteric vessels (superior mesenteric vein to the left of the superior mesenteric artery) was found in two patients with distal ileocolic intussusception (head of the intussusceptum at the sigmoid colon or rectum). After reduction, the relationship of these vessels was normal in all 16 infants. CONCLUSION: Inversion of the superior mesenteric vessels is sometimes caused by distal ileocolic intussusception in infants.

Colon, Sigmoid↗
PubMed1992

Nephroblastomatosis: the whole spectrum of abnormalities in one case.

A case of nephroblastomatosis is described in a previously healthy child with a palpable mass in the right upper quadrant as an incidental finding. This case of nephroblastomatosis demonstrates the whole spectrum of abnormalities from local regression to formation of true Wilms' tumors bilaterally over a 4-year period. The evolution of these changes provides a graphic and dramatic example of this interesting entity, indicating its potential malignant association with Wilms' tumor.

Humans↗
PubMed1983

Bronchogenic cysts with high CT numbers.

Four patients with mediastinal masses are described. CT examinations demonstrated masses of high attenuation, and solid masses were suspected. At thoracotomy each patient had a cystic mass containing a brownish, turbid, mucoid material. The pathologic diagnosis in each case was a bronchogenic cyst. The possibility of such a cyst should not be excluded because of a high CT number, which reflects the turbid contents of the cyst.

Bronchial Diseases↗
PubMed1982

Equivocal lymphogram and lymph node aspiration: importance in staging carcinoma of the prostate.

Lymphography is often used in staging clinically localized carcinoma of the prostate, but has been criticized for lack of specificity and sensitivity. Strict criteria for metastases eliminate some false positives but increase the number of false negatives. In 50 cases, liberal criteria were used for an equivocal interpretation, and these nodal defects as well as positive defects were biopsied percutaneously with thin-needle aspiration and cytologic evaluation. Of 37 equivocal lymphograms, 18 (49%) had a positive biopsy establishing stage D disease without pelvic lymphadenectomy. The equivocal lymphogram is a important diagnostic category when it can be further evaluated by aspiration biopsy.

Biopsy, Needle↗
PubMed1982

Lymphography and percutaneous lymph node biopsy in clinically localized carcinoma of the prostate.

Accurate staging of prostatic carcinoma requires determination of the status of the regional draining lymph nodes. Pelvic lymphadenectomy is the definitive examination but has certain morbidity and even mortality. Lymphography is safe but may not be sufficiently accurate. A total of 41 patients with clinically localized disease and abnormal or suspicious lymphograms underwent percutaneous lymph node biopsy. Ten of 11 patients (91 per cent) with abnormal lymphograms and 14 of 30 (47 per cent) with suspicious lymphograms had positive cytology studies. Of the suspicious defects an unopacified void in a nodal chain most frequently was positive. Of 22 potentially curable patients with stages A and B1 disease 12 had metastatic disease.

Biopsy↗
PubMed1982

A comparative study of mesothelioma and asbestosis using computed tomography and conventional chest radiography.

A comparative study using computed tomography and conventional posteroanterior radiography was performed on 27 patients with mesothelioma and 13 patients with advanced asbestosis. The major pathologic features of both asbestosis and mesothelioma were well demonstrated by both modalities; computed tomography demonstrated the findings more frequently and in greater detail. No distinguishing features could be established based on configuration and size of the lesion. Many pleural plaques associated with advanced asbestosis were large and irregular and resembled those associated with mesothelioma. However, nodular involvement of the pleural fissures, pleural effusion, and ipsilateral volume loss with a fixed mediastinum were features predominating in mesothelioma. Growth determination of the plaques associated with asbestosis may be of minimal value since such plaques also undergo growth due to active inflammatory changes.

Asbestosis↗
PubMed1981

Case report. Aneurysm of the ductus arteriosus in an adult.

Aneurysm of the ductus arteriosus is unusual in the adult. Computed tomography (CT) may be critical in making a preoperative diagnosis. The value of CT in the diagnosis of this entity, as well as its likely pathogenesis, is discussed.

Aged↗
PubMed1981

Carcinoma of the prostate: lymph node aspiration for staging.

Percutaneous fine-needle aspiration biopsy of suspect nodes was used for histologic staging in 33 patients with clinically localized carcinoma of the prostate after an abnormal or suspicious lymphogram. A total of 66 nodes was biopsied, and positive cytology for metastatic carcinoma was obtained from 29 nodes in 20 patients indicating the presence of stage D disease. Thus, staging lymphadenectomy and radical treatment by radiation or surgery were avoided.

Biopsy, Needle↗
PubMed1981

Displaced paraspinal line: role of CT and lymphography.

Demonstration of involvement of lower mediastinal paravertebral nodes in lymphomatous or metastatic disease may alter the mode of treatment or localization of fields for radiotherapy. Displacement of paraspinal lines in a posteroanterior chest radiograph may indicate such adenopathy. In 20 selected cases in which computed tomography and/or lymphography were performed, 13 of 16 lymphograms and 11 of 11 CT scans helped confirm a paraspinal mass, suggesting adenopathy. Paraspinal line displacement, CT criteria of adenopathy, and the greater sensitivity of CT in the paraspinal area are discussed.

Female↗
PubMed1981

Ventilation-perfusion mismatch due to obstruction of pulmonary vein.

A lobar perfusion defect in the presence of a normal arterial phase in the pulmonary angiogram may be due to stasis secondary to compression of a pulmonary vein by a hilar or perihilar mass. In this report we present a patient with metastasis to the right lung and hilum by malignant melanoma. A lobar perfusion defect was present in an area of lung tht appeared normal by radiograph. This defect was shown to be due to stagnating blood flow reflected by delayed intense capillary phase in that lobe and late opacification of the corresponding draining vein.

Adult↗
PubMed1979

Post-lymphangiography fine needle aspiration lymph node biopsy in staging carcinoma of the prostate: preliminary report.

Five cases of clinical stage B carcinoma of the prostate are reported. Bipedal lymphangiography showed unequivocal involvement of the pelvic nodes in 3 patients and was equivocal in the other 2. Percutaneous transabdominal fine needle aspiration biopsy of abnormal or suspicious iliac nodes was performed and a positive cytolocal diagnosis of metastasis was obtained in all 5 patients. Therefore, staging lymphadenectomy and an extensive radical operation were avoided. Percutaneous fine needle biopsy is a reliable, easy and safe technique that should be used in staging prostatic carcinoma whenever there is evidence of metastatic nodal involvement by lymphangiography.

Biopsy, Needle↗