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Biomedical subjects

D B Kopans

Publications and source records attributed to D B Kopans.

At least 163 records · Page 9Linked to original sources
PubMed1983

CT evaluation of locally advanced carcinoma of the distal colon and rectum.

Computed tomography (CT) correctly identified extraluminal extension in carcinoma of the rectum and distal sigmoid in 20 patients who were deemed clinically inoperable because of tumor fixation. All patients received preoperative radiation therapy and subsequent surgical resection of the tumor. The findings at surgery corroborated the presence and location of tumor extension deep to the wall of the colon. Based on this preliminary data, further investigation into the place of CT in treatment planning of colon carcinomas is indicated.

Adenocarcinoma↗
PubMed1983

Ultrasound, x-ray mammography, and histopathology of cystosarcoma phylloides.

Ultrasound and x-ray mammograms were obtained in 8 patients with palpable breast masses, which were subsequently proven to be cystosarcoma phylloides. Histopathologic examination of the 8 tumors showed benign cystosarcoma phylloides in 5, recurrent benign tumor in 1, coexistent invasive papillary carcinoma in 1, and coexistent in situ duct cancer and in situ lobular cancer in 1. A retrospective review of the B-scan images was undertaken to list the descriptive ultrasound features of cystosarcoma phylloides. The ultrasound findings included low-level internal echoes, smooth walls, and good through transmission. The carcinomas were indistinguishable from the benign lesions, although ultrasound was able to distinguish the cystosarcoma phylloides lesions as predominantly solid lobulated masses.

Adolescent↗
PubMed1983

Breast cancer.

Explore the source record for details and available documents.

Axilla↗
PubMed1982

Preoperative roentgenographically guided percutaneous localization of occult breast lesions: three-year experience with 180 patients and description of a method.

The identification of a suspicious occult breast lesion with mammography should, in most instances, result in roentgenographically guided localization followed by surgical excision. Over a three-year period, we performed 180 roentgenographically guided preoperative localizations for occult breast lesions, 32% (57/180) of which were malignant. Of the total, there were 85 masses and 95 clustered microcalcifications. We prefer to use a modified hookwire for lesion localization.

Biopsy, Needle↗
PubMed1982

Malpositioned biliary endoprosthesis: retrieval using a vascular balloon catheter.

Successful function of an indwelling biliary endoprosthesis requires precise initial positioning relative to the stricture site. Delayed failures may occur as a result of migration either proximally or distally. The authors describe a method for retrieval of a distally displaced endoprosthesis using a vascular balloon-dilatation catheter.

Aged↗
PubMed1982

Peripelvic cysts: an impostor of sonographic hydronephrosis.

Static and real-time ultrasound examinations have proved clinically useful in the evaluation of renal obstruction. False-negative findings are rare. False-positive findings have been reported as being due to slightly dilated, nonobstructed urinary systems causing the ultrasonographic appearance of mild (grade I) hydronephrosis. The authors describe the ultrasonographic appearance of 16 false-positive cases that had suggested moderate (grade II) to severe (grade III) hydronephrosis in collecting systems subsequently shown to be completely unobstructed. This appearance was caused by peripelvic cysts. These cases emphasize the screening role of ultrasound and the need to employ additional diagnostic modalities to verify the presence of hydronephrosis and renal obstruction.

Cysts↗
PubMed1981

Stability of a mammographic mass: a false sense of security.

The observation of growth rates of human breast cancers on serial mammography has afforded an opportunity to document the spectrum of the natural history of these tumors in vivo. Five breast carcinomas in four patients were seen on mammography as clinically occult masses at least 1 cm in diameter. These lesions did not change in size on follow-up xeromammography over a minimum of 2 and a maximum of 4.5 years from the original radiographic examination. Since it is common practice for radiologists to recommend a repeat examination in 3-12 months of nonpalable masses, architectural distortions, and asymmetric areas of increased density which may not have typical signs of malignancy, the lack of interval changes does not necessarily indicate a benign process.

Aged↗