Search Results
Results 601 - 650 of 795
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Yiannias J A - - 2001
Benign lymphangioendothelioma is an acquired lymphangiectatic lesion that must be recognized and differentiated from angiosarcoma, early Kaposi's sarcoma, and lymphangioma circumscriptum. We report the case of a 68-year-old woman with the clinical presentation of a possible actinic keratosis and the typical histologic findings of benign lymphangioendothelioma and an overlying actinic ...
Chen C M - - 2000
BACKGROUND: This study investigated the immunophenotypic patterns of CD34, CD117 (a product of the c-kit proto-oncogene), and actin (HHF35) in benign and malignant phyllodes tumors (PTs). We correlated the expression of CD34, CD117, and actin with histopathological grade. MATERIALS AND RESULTS: We analyzed 19 cases (7 benign and 12 malignant ...
Huo Z - - 2000
RATIONALE AND OBJECTIVES: The purpose of this study was to evaluate the robustness of a computerized method developed for the classification of benign and malignant masses with respect to variations in both case mix and film digitization. MATERIALS AND METHODS: The classification method included automated segmentation of mass regions, automated ...
Dutt S N - - 2000
Primary epidermoid cyst of the salivary gland is extremely rare and has only been reported once in the parotid gland A case of epidermoid cyst of the submandibular gland is presented, which required excisional biopsy for the diagnosis. Such excision is also curative.
Walsh C - - 2000
One can strongly suspect a benign lesion in a prepubertal child on the basis of preoperative sonographic, biochemical, and clinical evaluation; however, when considering a testis-sparing enucleation, the definitive diagnosis must be established by pathologic frozen section of the tumor. The high incidence of benign testicular lesions in the prepubertal ...
Schnadig V J - - 2000
CONTEXT: Urethral adenomatous polyps with prostatic epithelium (also known as benign prostatic epithelial polyps [BPEPs]) are a documented cause of hematuria, dysuria, and hematospermia, conditions that may prompt cytologic evaluation of urine. DESIGN: The urine cytologic test findings in 5 cases of biopsy-proven BPEPs and in 1 case of prostatic ...
Dimachkie M M - - 2000
Benign monomelic amyotrophy is an uncommon cause of progressive mildly disabling atrophy and weakness of a limb. It predominantly affects the distal upper limb of young men. We present two women with benign monomelic of amyotrophy of the lower extremity. Although thedisorder seemed clinically confined to a leg, we confirmed ...
Waterston J - - 2000
The differential diagnosis of dizziness includes vertigo as well as numerous other causes of faintness or lightheadedness. Vertigo is a common symptom that has diverse causes. Because of uncertainties about the diagnosis, many patients are treated symptomatically without a specific diagnosis being made. Most patients have benign, peripheral (otological) causes ...
Manojlović S - - 2000
Deep soft tissue leiomyomas are extremely rare benign tumors in childhood. An unusual case of benign calcified leiomyoma of the pterygoid muscle in an 8-year old boy is presented. Clinical manifestations and radiographic and histologicpathologic findings, as well as the differential diagnosis and possible histogenesis of this rare tumor, are ...
Schweinfurth J M - - 2000
Benign laryngeal disorders result in dysphonia because of effects on glottic closure and the vibratory characteristics of the true vocal fold. Treatment is initially directed at reversing medical conditions and patterns of abuse with surgery reserved for unresolving lesions resulting in troublesome dysphonia. Benign lesions that require surgery are excised ...
Varghese S L - - 2000
Many rare variants of prostatic carcinoma have been described and characterized in recent years. Accurate diagnosis of these variants is necessary in order to determine appropriate therapy. Unusual tumors arising in the prostate raise questions of histogenesis, and may carry a better or worse prognosis than typical adenocarcinoma. Virtually the ...
Di Girolamo S - - 1999
Three days after the initial fitting of the cochlear device a 40-year-old woman complained of severe rotational vertigo following head movements associated with neurovegetative symptoms. Otoneurological evaluation revealed a horizontal paroxysmal positional nystagmus beating towards the lowermost ear, induced by rolling the patient's head from supine both to the right ...
Thin R N - - 1999
Prostatitis, especially chronic prostatitis, is sometimes regarded as an obscure, ill-defined condition, perhaps because the anatomical location of the gland and ill-defined symptoms make diagnosis difficult. Treatment may appear time consuming and tiresome for doctor and patient, but by following established principles, diagnosis is often simple and management straightforward.
Sedonja I - - 1999
PURPOSE: This study compared the efficiency of SPECT with planar bone scans in differentiating malignant from benign lesions and in detecting metastases to the spine. METHODS: Planar scintigraphy and SPECT were performed in 37 patients with low back pain without known malignancy and in 38 patients with confirmed malignancy. The ...
Dilts S M - - 1999
Our studies in the NOD mouse demonstrate that the autoimmune response can be either benign or malignant. In the former case </=10% of the islets in the pancreas are damaged. The latter is associated with massive islet damage which leads to the development of clinical disease within 2-3 weeks. From ...
Ganott Marie A. - - 1999
The purpose of this study was to analyze the causes of false-negative breast imaging in symptomatic and asymptomatic patients, as defined by cancer diagnosed within 1 year of a nonsuspicious mammogram. A computerized audit of 27,305 mammograms performed between November 1992 and December 1993 identified 50 patients who developed malignancy ...
Shih T T - - 1999
Differentiation of benign from malignant causes of vertebral compression fracture can be difficult at a single location. We studied 37 patients with solitary vertebral collapse (SVC) in the spine using magnetic resonance imaging (MRI). Sixteen of them were found to have a benign cause of SVC, while the remaining 21 ...
Arauz S - - 1999
The acetabulum is an unusual location for benign osteoblastoma, usually seen in adolescents and young adults. This article reports a case of an intra-articularly expanding benign osteoblastoma of the acetabulum in a 6-year-old boy. The diagnostic and surgical features of the disease in this unusual location at this young age ...
Suzuki M - - 1999
Benign paroxysmal positional vertigo (BPPV) is one of the common vestibular disorders. Canalolithiasis is thought to be a likely lesion. A canalith repositioning procedure (CRP by Epley) generally yields good resolution of vertigo and nystagmus. The authors confirmed the efficacy of this procedure on typical BPPV of the posterior semicircular ...
Reiter E R - - 1999
Microscopic evaluation of all adult tonsillar specimens has been considered essential despite the low incidence of unsuspected pathologic conditions. We evaluate whether routine histologic examination of clinically benign adult tonsillar specimens is indicated. We retrospectively reviewed pathology results from all tonsillectomies performed on patients ages 18 years or older at ...
Hsieh S C - - 1999
Elastofibroma dorsi is a benign fibroproliferative lesion of unknown pathogenesis. It is most commonly found in the periscapular region in elderly women. The majority of patients are asymptomatic. The lesions have a characteristic location and a specific magnetic resonance imaging (MRI) appearance allowing accurate prospective diagnosis. The importance of recognizing ...
Büttner U - - 1999
Head positioning can lead to pathological nystagmus and vertigo. In most instances the cause is a peripheral vestibular disorder, as in benign paroxysmal positioning vertigo (BPPV). Central lesions can lead to positional nystagmus (central PN) or to paroxysmal positioning nystagmus and vertigo (central PPV). Lesions in central PPV are often ...
Cohen M B - - 1998
This commentary addresses the newly proposed classification of the rare atypical prostatic stromal lesions of the prostate. The entity called "prostatic stromal proliferation of uncertain malignant potential" apparently has a benign behavior. The entity "prostatic stromal sarcoma" might have a malignant potential, but its line of differentiation is still unclear.
Bartels P H PH Optical Sciences Center, University of Arizona, Tucson 85721, - - 1998
The objective of this study was to identify and document prostatic intraepithelial neoplasia (PIN) and malignancy associated changes in secretory cell nuclei from visually normal appearing tissue regions of prostates harboring PIN or adenocarcinoma. High-resolution digitized images of nuclei were recorded in histologically normal appearing tissue regions at defined distances ...
Seong B M - - 1998
We recently experienced a 43-year-old man with a large, multiloculated, cystic tumor that appeared on the pelvis. The tumor was composed of glands and cysts lined by prostatic-type epithelium and attached microscopically to the prostate by a pedicle. The prostatic nature of the lesions was confirmed by immunohistochemical staining of ...
Perini F - - 1998
Benign cough headache presents as a sudden bilateral, short-lasting pain precipitated by coughing. The diagnosis requires noninvasive brain-imaging so that secondary causes can be ruled out. We describe a man, 57 years of age, complaining of an atypical form of benign cough headache which shares some features with episodic cluster ...
Angeid-Backman E - - 1998
Retrospective analysis of pelvic sonograms with colorguided spectral Doppler evaluation of 189 adnexal masses yielded four malignancies, 20 benign neoplasms, 32 cysts, and 14 endometriomas. Fifty-eight masses were presumed benign on additional imaging. Pulsatility index (PI) < 1.0 was seen in 70% neoplasms, 63% benign cysts and 50% endometriomas. Thirteen ...
Baloh R W - - 1998
The history usually provides the key information for distinguishing between peripheral and central causes of vertigo. Probably the only central lesion that could masquerade as a peripheral vestibular lesion is cerebellar infarction because vertigo and severe imbalance may be the only presenting features. MRI is indicated in any patient with ...
Davis R S - - 1998
High resolution ultrasound has increased our awareness of benign testicular cysts that appear to arise from the intratesticular sperm conduit system of the intratesticular ducts of the mediastinum and rete testis. The location of these benign cysts in the area of the mediastinum and rete testis and the absence of ...
Shin M - - 1998
BACKGROUND: Differential diagnosis of adenocarcinoma from other proliferative conditions in the prostate is often problematic. Immunohistochemistry using an antibody (34 beta E12) to high molecular weight cytokeratin, specifically present in basal cells of the prostate, could clearly demonstrate the presence or absence of these cells in the proliferating glands and ...
Hallock G G GG Division of Plastic Surgery, the Lehigh Valley Hospital, Allentown, PA, - - 1998
Expeditious yet efficacious removal of skin tumors is a common responsibility for the plastic surgeon. The need to minimize potential risks for mortality or morbidity from undue or excessive surgical resections and to control costs by avoiding unnecessary procedures behooves us to make a precise clinical diagnosis preceding any decision ...
Anim J T - - 1998
Although the medical literature contains adequate accounts of the pathophysiology of various benign prostatic disorders, it is often necessary to revisit these lesions, to reexamine the relationships between known benign lesions and more sinister, malignant disorders, in the light of new advances in our understanding of the processes. We carried ...
Yamaguchi K - - 1997
BACKGROUND: An accurate frozen section diagnosis is important when deciding the surgical strategy against a gallbladder tumor intraoperatively. Little has been reported on the accuracy of frozen section diagnosis of the gallbladder. PATIENTS AND METHODS: In a total of 86 consecutive patients with gallbladder tumor, the accuracy of the frozen ...
Kerr L D - - 1997
Although Henoch-Schönlein Purpura (HSP) is widely believed to be a benign, self-limited form of vasculitis, this generalization, when applied to adults, may not be valid.We describe five patients with prolonged severe vasculitis, all of whom met American College of Rheumatology criteria and carried a clinical arid tissue diagnosis of HSP. ...
Gaudin P B - - 1997
Various benign processes can mimic prostatic adenocarcinoma on needle biopsy. These processes include glandular lesions such as adenosis, atrophy, VMGH, and BCH; inflammatory conditions such as acute and chronic or granulomatous prostatitis; and the effects of therapy such as external beam radiation or androgen deprivation. Normal benign prostate tissues including ...
Uncu G - - 1997
The results of laparoscopic adnexial cyst excision operations performed within the last 2.5 years in our clinic are reported. Thirty-three adnexial masses thought to be benign after gynaecological examination and ultrasonographic findings were treated. Laparoscopy was done in 32 cases but laparotomy had to be performed in one case of ...
Roy C - - 1997
Four cases of a pelvic mass due to the development of benign hyperplasia within ectopic prostatic tissue are reported. They presented a hypoechoic homogeneous or heterogeneous pattern on transrectal ultrasonography and a high signal intensity on T2-weighted spin-echo sequences on MR. On CT the density was similar to that of ...
Böke E - - 1997
Benign mesenchymoma is an extremely rare neoplasm mostly located in or about the kidney and is composed of a haphazard mixture of adult fat, fibrous tissue and tangled blood vessels, scattered nests or masses of smooth muscle cells, occasionally islands of cartilage, bone, and lymphoid tissue as well as other ...
Hagler J - - 1996
Eccrine poroma is a benign, slow growing, solitary adnexal tumor. Malignant degeneration may take place in longstanding solitary lesions; in such cases cutaneous and fatal visceral metastases have occurred. Our goal was to determine whether flow cytometry yields useful diagnostic and prognostic information on benign and malignant eccrine poroma. Flow ...
Weijman J - - 1996
Hyperplastic and metaplastic lesions in the prostate gland of bulls are used as morphological evidence for the illegal administration of oestrogens or compounds with oestrogenic activity, like stilbenes. Exogenous and endogenous androgens can suppress the effects of these drugs, resulting in suspect or negative results. The detection of epithelial changes ...
Tran L P - - 1996
Benign mass lesions of the external auditory canal, such as exostoses and osteomas, are common findings on physical examination but most often do not require treatment. The differential diagnosis of lesions in the external auditory canal, however, should not be limited to those benign processes discussed here, but should also ...
Hamele-Bena D - - 1996
In 1986 mucocele-like lesions (MLL) were described as benign tumors; subsequent reports identified MLL associated with ductal hyperplasia or carcinoma (CA). To characterize MLL further, we studied 53 lesions from 49 patients, in whom 25 MLL were benign and 28 were malignant (14 in situ, 14 invasive). Two had bilateral ...
Kirsch A J - - 1996
Giant multilocular prostatic cystadenoma is a rare clinicopathologic entity characterized by benign histology and the ability to enlarge massively. The lesion may arise from the prostate gland either in continuity with the prostatic urethra or separate from it, or it may arise as a lesion distinct from the prostate gland. ...
Soler R - - 1996
OBJECTIVE: To evaluate the value of each MRI findings in differentiating the nature of soft tissue lesions. SUBJECTS AND METHODS: We performed a blind retrospective review of MR imaging in 65 consecutive soft-tissue lesions (cystic lesions in or around the joints, and the soft tissue abnormalities directly related to a ...
Mogi K - - 1996
Benign cementoblastoma is a rare benign odontogenic tumour of mesenchymal origin. A case of a 24-year-old man with benign cementoblastoma is presented. The lesion manifested as a round, radiopaque mass attached to the root of the left first molar of the mandible. The tooth was extracted and the lesion was ...
Cespedes R D - - 1996
A previously healthy 42-year-old white male presented with urinary obstruction. Radiographic evaluation revealed a 4-cm prostatic mass extending into the bladder. Transrectal biopsies revealed a sarcomatoid histology with atypical spindle cells suspicious for possible sarcoma. A transurethral resection of the prostate was performed revealing a benign fibromyxoid lesion with spindle ...
Xu L Z - - 1995
Morphological typing of argyrophilic nucleolar organizer regions (AgNOR) in 300 cases of malignant tumors and 140 cases of benign lesions was analyzed and five morphological types of AgNOR were described in detail. In malignant tumors, the diffuse type (78%) was the most frequently seen, and in benign lesions, the nucleolar ...
Engel P - - 1995
The morphological heterogeneity of thymomas has caused much confusion respecting their classification. Recently Kirchner & Müller-Hermelink (4) proposed a histological subclassification which has been claimed to represent an independent prognostic factor: medullary and mixed thymomas are benign; organoid and cortical type as well as well-differentiated thymic carcinomas are low-grade malignant ...
Baloh R W - - 1995
Positional nystagmus that does not fatigue, persists as long as the position is held, and changes direction in different head positions has typically been attributed to central vestibular lesions. We recently studied three patients who presented with positional nystagmus having these features but almost certainly of benign peripheral origin. All ...
Coakley F V - - 1995
PURPOSE: To determine the aetiology of solitary spinal hot spots on planar bone scans and to determine which radiographic and scintigraphic features aid in distinguishing benign from malignant lesions. MATERIALS AND METHODS: 81 bone scans showing a solitary hot spot in the spine were identified. Aetiology was determined in 73 ...
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