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Heterogeneous Mass (heterogeneous + mass)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

Comparison of MicroSeal and System B/Obtura II obturation techniques

INTERNATIONAL ENDODONTIC JOURNAL, Issue 12 2003
P. R. Cathro
Abstract Aim, To compare the proportion of gutta-percha, sealer and voids following the filling of simulated root canals in plastic blocks using two warm gutta-percha techniques. Methodology, Ten simulated root canals in plastic blocks were prepared using System GT Rotary Files® and a .02 taper size 40 Quantec rotary nickel,titanium instrument and then filled with MicroSeal and Kerr EWT sealer. A further 10 simulated canals were prepared solely with System GT Rotary Files® and obturated with System B/Obtura II and Kerr EWT sealer. All blocks were sectioned at 1 mm intervals. The sectioned root fillings were photographed through a stereomicroscope and the resultant slides scanned. The images were analysed using adobe photoshop 6.0 to give the proportions of gutta-percha, sealer or void at each level. The data were analysed using unpaired Student's t -test and Mann,Whitney U -test. Results, The MicroSeal technique produced a dense homogeneous gutta-percha fill at the apical 1 and 2 mm levels similar to the System B/Obtura II technique, but further coronally the sealer became mixed into the MicroFlow gutta-percha producing a heterogeneous mass with significantly less (P < 0.05) solid gutta-percha in the root filling compared to System B/Obtura II. The MicroSeal technique generally had more pooling of cement than the System B technique, however, this was only significantly different (P < 0.05) at the 4 mm level. The System B/Obtura II obturation gave an average of 99.27% ± 1.09 gutta-percha fill at all levels. Conclusions, The MicroSeal technique produced a heterogeneous fill consisting of the MicroFlow Master Cone and gutta-percha from the MicroFlow Cartridge mixed with sealer. The System B/Obtura II technique produced a homogeneous fill at all levels. [source]

Primary seminoma of the prostate

INTERNATIONAL JOURNAL OF UROLOGY, Issue 12 2009
Takeshi Hashimoto
Abstract A 54-year-old gentleman was suspected of having sarcoma of the prostate because of his low serum prostate-specific antigen level (1.9 ng/mL) and an enlarged heterogeneous mass on computed tomography and magnetic resonance imaging scans. Pathological examination of the prostate needle biopsy indicated seminoma, which was confirmed with immunohistochemical staining. There was no evidence of disease in other areas on physical examination or on radiographic tests. Therefore, we diagnosed the case as a primary seminoma of the prostate, which was consequently treated with a total of three courses of bleomycin, etoposide and cisplatin chemotherapy. Complete response was obtained on computed tomography, magnetic resonance imaging and prostate needle re-biopsy. To our knowledge, there have only been five cases of primary seminoma of the prostate reported. [source]

Sonographic appearances of malignant lymphoma of the salivary glands

JOURNAL OF CLINICAL ULTRASOUND, Issue 9 2001
Mayumi Yasumoto MD
Abstract Purpose We undertook this retrospective study to describe the sonographic findings in patients with malignant lymphoma of the major salivary glands. Methods We reviewed the sonograms and medical records of 7 patients with histologically proven lymphoma of the parotid (3 patients) or submandibular glands (4 patients). Results Primary lymphoma was found in 1 parotid gland and 2 submandibular glands. The remaining 4 cases were secondary lymphomas. One patient had been diagnosed with Sjögren's syndrome and had been followed up with sonography. In parotid glands, both parenchymal and intraparotid nodal lymphomas were found. All submandibular gland tumors were parenchymal. Intraparotid nodal involvement appeared as multiple small nodules with relatively smooth margins, whereas the parenchymal parotid and submandibular gland lymphomas were larger (25 to 45 mm in longitudinal diameter) and showed various degrees of margin irregularity. All tumors were hypoechoic relative to the normal parenchyma. The primary parotid lymphoma and intraparotid nodal lymphomas had a homogeneous echotexture; the secondary parotid lymphomas and submandibular gland lymphomas were heterogeneous. One submandibular gland lymphoma showed intratumoral echogenic stripes. Neither calcification nor cystic degeneration was observed within the lesions. Conclusions Lymphomas of the salivary glands present a variety of sonographic appearances, ranging from multiple small, hypoechoic nodules to an irregularly shaped heterogeneous mass without cystic areas or calcifications. © 2001 John Wiley & Sons, Inc. J Clin Ultrasound 29:491,498, 2001. [source]

Histologic Heterogeneity of Masses at Percutaneous Breast Biopsy

THE BREAST JOURNAL, Issue 4 2002
Elizabeth A. Morris MD
The purpose of this study was to determine whether different histologic findings are obtained from different areas of breast masses seen on mammography when targeted on stereotactic breast biopsy. Twenty-one masses (mean size, 1.8 cm; range, 0.7,5.5 cm) underwent stereotactic biopsy using a 14-gauge directional vacuum-assisted biopsy probe (Mammotome, Biopsys/Ethicon Endo-Surgery, Cincinnati, OH). The central and peripheral areas of the mass were targeted and biopsied separately, and histologic findings from the targeted center and periphery were compared. Six of 21 masses (29%) were heterogeneous, yielding different histologic results from the targeted center and periphery. In 4 heterogeneous masses, which constituted 4 of 21 masses (19%) in this study, surgical biopsy was recommended on the basis of findings obtained from only the center (n = 2) or the periphery (n = 2). Stereotactic biopsy findings in these 4 masses were atypia in 3 and radial scar in 1; none of these 4 masses had carcinoma at surgery. In all 4 masses that proved to be malignant, the diagnosis of carcinoma was made in specimens obtained from both the targeted center and the periphery of the mass. Breast masses can be heterogeneous, yielding different histologic findings from different areas of the mass. Our data suggest that sampling part but not all of a mass may miss certain histologic components of the mass, but should not result in a failure to diagnose carcinoma. [source]