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J R Srigley

Publications and source records attributed to J R Srigley.

At least 55 records · Page 3Linked to original sources
PubMed1990

Basal epithelial cells of human prostate gland are not myoepithelial cells. A comparative immunohistochemical and ultrastructural study with the human salivary gland.

The hypothesis that basal epithelial cells of the human prostate are of myoepithelial origin was investigated using immunohistochemical and ultrastructural methodologies. The immunohistologic analyses show significant phenotypic differences between prostatic basal cells and myoepithelial cells of the salivary gland. Although both cell types stain intensely with the 312C8-1 monoclonal antibody, only true myoepithelial cells demonstrated significant amounts of muscle-specific actin as decorated by the HHF35 monoclonal antibody. Furthermore, using double-labeling experiments, the prostatic basal cells were strongly decorated with a fluorescein-tagged basal cell-specific keratin but were negative with the rhodamine-tagged phalloidin, a chemical that binds specifically to actin microfilaments. Ultrastructural studies also showed an absence of thin microfilament bundles, dense bodies, and micropinocytotic vesicles in the prostatic basal cells. The current investigations show that the prostatic acini do not have a basal myoepithelium. Although some authors have suggested a stem cell role for prostatic basal cells, the weight of experimental work argues against this hypothesis. The exact role of the basal epithelial cells of the prostate is not known, although they may serve endocrine, paracrine, or other regulatory functions and may be involved in modulating signals between prostatic stroma and epithelium.

Actins↗
PubMed1990

In situ adenocarcinoma ex pleomorphic adenoma of the lacrimal gland.

We report a unique case of in situ adenocarcinoma ex pleomorphic adenoma of the lacrimal gland. The patient is alive and disease-free 2 1/2 years after complete local excision of the tumour. The current clinicopathologic status of this unusual tumour is discussed in the context of the reported experience to date.

Adenocarcinoma↗
PubMed1989

Transrectal fine-needle aspiration and truecut needle biopsy of the prostate: a blinded comparison of accuracy.

Transrectal needle aspiration biopsy and core biopsy of the prostate were performed simultaneously on 88 men with prostatic nodules. Cytologic and histologic assessments were made in a blinded, independent fashion, and the results were compared. All patients with positive findings on aspiration also had positive findings on core biopsy, for a positive predictive value for aspiration of 100%. However, five negative and six "insufficient" results obtained by aspiration were positive on core biopsy, for a negative predictive value for aspiration of 88%. This experience support the use of needle aspiration as an initial diagnostic maneuver in the assessment of prostatic nodules.

Biopsy, Needle↗
PubMed1988

Small-acinar patterns in the prostate gland with emphasis on atypical adenomatous hyperplasia and small-acinar carcinoma.

A number of anatomic structures and pathophysiologic processes can mimic small-acinar carcinoma of the prostate gland. Seminal vesicles, ejaculatory ducts, and Cowper's glands can, at times, enter into the differential diagnosis of adenocarcinoma. Likewise atrophy, postatrophic hyperplasia, and some variants of central nodular hyperplasia can present a troubling small-acinar pattern. Another common proliferation referred to as atypical adenomatous hyperplasia lies on a morphologic continuum with low-grade acinar carcinoma and is thought by many investigators to be premalignant. Its distinction from minimal-deviation adenocarcinoma is made on the basis of both architectural and somewhat arbitrary nuclear criteria. When encountered alone, atypical adenomatous hyperplasia alerts the pathologist to examine all tissue, as it is a frequent accompaniment of well-differentiated adenocarcinoma. Once a diagnosis of low-grade acinar carcinoma has been made, accurate pathologic staging, especially in conjunction with clinically unsuspected disease (stage A), is extremely important in treatment planning and prognostication.

Adenocarcinoma↗
PubMed1988

Atypical spindle cell lesions of the prostate.

This report is a review of the spectrum of prostatic spindle cell lesions that are usually benign, but have morphologic features suggestive of high-grade malignancy. The problem is complicated further by the extreme rarity and heterogeneity of such lesions. Sixteen cases of atypical prostatic spindle cell proliferations are reported, and the differential diagnosis with malignancy is reviewed.

Adult↗
PubMed1987

Diffuse epithelial mesothelioma: a review of the ultrastructural spectrum.

Traditionally, diffuse epithelial mesotheliomas are mainly identified at the ultrastructural level by the numerous, long, wavy-appearing surface microvilli. By electron microscopy of a series of diffuse mesotheliomas of varying subtype (epithelial, biphasic, sarcomatous, and poorly differentiated), it can be demonstrated that the differentiation of this specialized surface organelle is quite variable even in well-differentiated lesions. The presence of only a few, scattered, short microvilli does not exclude a diagnosis of epithelial mesothelioma, particularly if historical, surgical, and radiologic findings support this diagnostic conclusion. Indeed, even the complete absence of surface microvilli is compatible with a diagnosis of diffuse epithelial mesothelioma. It is important to become aware of the spectrum of tumor cell differentiation in serosal tumors, as all of the fine structural diagnostic criteria in mesotheliomas are expressed to varying degrees in individual cases.

Adult↗
PubMed1987

Diagnostic electron microscopy of male genital tract tumors.

As illustrated in this review, neoplasms of the male genital tract are markedly heterogenous, reflecting their complex embryologic derivation and histogenetic classification. Transmission electron microscopy has greatly increased our understanding of the structure of these tumors, and in doing so has greatly improved our light microscopy. Additionally, in a number of selected situations, TEM also provides important practical diagnostic information. Currently, light microscopy in conjunction with clinical information is the central tool of tumor taxonomy. However, TEM with histochemistry, immunohistology, analytic cytometry, and molecular biology provide practical and useful information in some situations. In all cases, the application of these techniques has greatly increased our overall understanding of tumor structure, pathobiology, and classification.

Diagnosis, Differential↗
PubMed1986

Localized fibrous tumour of serosal surfaces. Immunohistochemical and ultrastructural evidence for a type of mesothelioma.

It is uncertain whether localized lesions of serosal membranes have a kinship to mesotheliomas or are truly fibromatous in nature. Ultrastructural and immunohistochemical investigations were carried out on 12 localized benign and malignant pleural and peritoneal tumours from 10 patients. Electron microscopic findings, including the consistent and non-fibroblastic cellular organization of localized neoplasms, the presence of some form of intercellular junctions in 7 of 10 cases, basal lamina deposition in 3 cases, and polarized microvilli in one case indicated a form of mesothelial differentiation. Using monoclonal and polyclonal antibodies, positive immunostaining of tumour cells for cytokeratin peptides was detected in one case, while antibody to vimentin stained four cases. Light microscopic, ultrastructural and immunohistochemical features of one benign localized serosal tumour, with a unique blend of epithelial and spindle cells, provided further evidence for a histogenic link between localized serosal tumours and diffuse epithelial mesotheliomas. On the basis of the current findings and reports in the literature, it would appear that the majority of localized tumours of serosal membranes are a subset of mesothelioma, while a minority are fibromas.

Adult↗
PubMed1986

Clear cell cribriform hyperplasia of prostate. Report of 10 cases.

We report 10 patients with clear cell cribriform hyperplasia of the prostate. Their ages ranged from 62 to 87 years, with a mean of 72 years. The clinical diagnosis in all patients was benign nodular hyperplasia; all the patients are alive and have shown no evidence of recurrent disease. Follow-ups ranged from 1 month to 7 years (median: 12.5 months; mean: 24.6 months). Pathologically, this lesion has a cribriform arrangement of clear cells with a complex papillary growth simulating the cribriform pattern of prostatic carcinoma. In fact, in five of the 10 cases, the referring diagnosis was either carcinoma or possible carcinoma. Cytologically, however, there is no nuclear atypia, mitosis, or prominent nucleoli, and typically there is a double epithelial cell layer at the periphery of the involved acini. In summary, clear cell cribriform hyperplasia is a benign hyperplastic process with a complex papillary-cribriform structure and should not be confused with prostatic carcinoma. The key feature for the diagnosis is the preservation of nodular configuration with a bland cytology and double cell layer lining the involved acini.

Adenocarcinoma↗
PubMed1986

Nucleic acid cytometry of homosexual-associated lymphoproliferative disease.

Twenty-six reactive lymph nodes and 5 malignant lymphomas from homosexual males were studied by acridine orange flow cytometry (AO-FCM) for determination of ploidy, proliferation, and RNA characteristics. Two reactive lymph nodes showed ploidy abnormalities as compared with none of 27 reactive lymph nodes from nonhomosexual patients. The homosexual-associated (HA) lymphadenopathy had a higher mean proliferative activity (11.2% versus 5.6%) and higher ribonucleic acid (RNA) content (1.11 versus 0.96) than non-HA counterparts. The proliferative activity of HA lymphadenopathy was also higher than follicular small cleaved cell lymphoma, and not dissimilar to that of follicular large cell lymphoma. These findings indicate that HA-reactive lymphadenopathy is a hyperproliferative state associated with high cellular RNA content and rare DNA-abnormal stemlines. One HA lymphoma had an abnormal stemline by AO-FCM, compared with 9 of 15 (63%) non-HA high grade lymphomas. This lymphoma also demonstrated an abnormal karyotype (47,XY, +12, t[8;22]) by classic cytogenetic studies. The mean proliferative activity and RNA content of HA lymphomas was higher than non-HA counterparts (37% versus 22.5% and 2.48 versus 1.73, respectively). The proliferation and RNA features of HA lymphoma were on higher planes than non-HA lesions histologically comparable. Thus, in addition to differences in clinical presentation, histologic subtype, stage distribution, and therapeutic response, HA lymphomas have DNA/RNA characteristics different from those of counterparts in the general population.

Adult↗
PubMed1985

DNA flow cytometry of thyroid neoplasms.

Mechanically dispersed cell suspensions from 23 thyroid lesions were studied by acridine orange flow cytometry. Eight of 14 carcinomas (three papillary, two medullary, two Hürthle cell, and one follicular) manifested abnormal DNA indices ranging from 0.6 to 2.0. Six carcinomas (four papillary and two medullary) were diploid. Four patients having papillary carcinomas with diploid DNA content were young women whose clinical course of disease was indolent. Three papillary carcinomas with abnormal DNA content were found in older men with clinically aggressive disease. One benign adenomatoid nodule displayed a small population with a low-degree hyperdiploid stemline (DNA index = 1.1) with low proliferative activity. Differentiation between clinically indolent and aggressive carcinomas may be possible by nuclear DNA determination, but further work is needed to determine the importance of proliferative activity in thyroid carcinoma.

Adenocarcinoma↗
PubMed1985

Epithelioid hemangioma of the penis. A rare and distinctive vascular lesion.

Two patients, aged 36 and 47 years, respectively, had indurated subcutaneous penile nodules that were treated by local excision. Histologically, the lesions were characterized by cords and nests of plump epithelioid cells separated by a loose stroma containing numerous lymphocytes and eosinophils. Light microscopy identified definite vasoformative areas and solid regions with cytoplasmic vacuolization and nuclear atypia. Ultrastructural studies and immunohistochemical analysis for factor VIII-related antigen and Ulex europaeus agglutinin I demonstrated that the lesions were of endothelial origin. After excision of the nodules, the two patients are free of disease 5 1/2 and 6 1/2 years later, respectively. To our knowledge, a review of the literature produced only one similar case. These unusual vascular lesions, of undetermined cause, are proliferations of endothelial cells exhibiting an epithelioid structure that should be considered benign and treated locally.

Adult↗
PubMed1985

Q-fever. The liver and bone marrow pathology.

Eighteen liver and seven bone marrow biopsies from 44 patients with clinically and serologically proven Q-fever seen during a recent outbreak were studied. Highly distinctive fibrin-ring granulomas were found in seven liver and four bone marrow specimens. Lipid or nonspecific granulomas often containing neutrophils and variable numbers of giant cells were noted in 13 livers and seven bone marrows. A wide variety of nongranulomatous histological changes, frequently including steatosis and nonspecific "reactive" hepatitis, were seen in the liver biopsies. Identifiable rickettsiae were not present in tissue sections studied by microbiologic stains or electron microscopy. The histological response pattern to Coxiella infection is varied, and Q-fever should always enter the differential diagnosis of a granulomatous disease encountered in liver and bone marrow specimens.

Animals↗
PubMed1984

Radionuclide angiography and endomyocardial biopsy in the assessment of doxorubicin cardiotoxicity.

Thirty-eight patients with a mean age of 53.2 years (19 to 75 years of age), who were receiving doxorubicin (D) for malignant disease, were studied in order to determine the relationship between functional and morphologic myocardial changes at different dose levels. Serial patient evaluations included physical examination, chest x-ray, electrocardiogram (ECG), endomyocardial biopsy (EMB), and rest-exercise gated nuclear angiography (GNA), at doses of D ranging from 144 to 954 mg/m2 (mean, 426 mg/m2). Physical examination, chest x-ray, and ECG proved to be insensitive predictors of D cardiotoxicity. Correlation of GNA and EMB in 31 patient evaluations, exclusive of known heart disease, did not reveal any false-positive angiograms, and all abnormal GNAs were associated with abnormal biopsies. Use of stress GNA uncovered six abnormal ventricles which could have been missed with a rest GNA alone. It has been suggested that: (1) GNA is a reliable monitor of D therapy; (2) an exercise study should be performed when the rest ejection fraction is normal, but is unnecessary when the rest EF is abnormal; (3) all patients with a resting ejection fraction of less than 45%, exclusive of other cardiac disease, should have D discontinued; and (4) endomyocardial biopsy is useful in assessing D cardiotoxicity in patients with other possible causes of an abnormal GNA.

Adult↗
PubMed1984

Ultrastructural aspects of the histogenesis of diffuse and localized mesothelioma.

During an ultrastructural review of 30 diffuse and 10 localized mesotheliomas, it was apparent that some micrographs showed various stages in the developmental processes involved in the formation of histological patterns in diffuse mesotheliomas and a histogenetic link between diffuse and localized mesotheliomas. Cells in the stromal or sarcomatous regions of diffuse mesothelioma often show varying degrees of mesothelial differentiation and a gradual transition to cells with typical mesothelial characteristics that organize into structures recapitulating the surface layer of serosal membranes. Tumor cells in localized mesotheliomas had many similarities to the "stromal" cells in the diffuse counterpart including intercellular junctions, rare microvilli and occasional foci of basal lamina. It is postulated that diffuse and localized mesotheliomas share a common histogenetic origin as a result of neoplastic induction of specialized submesothelial cells. In this concept, tumor cells in diffuse mesotheliomas reflect stages in the differentiation and organization of normal serosal membranes and localized mesotheliomas mirror the earliest phases of this process.

Humans↗
PubMed1984

Ultrastructure of poorly differentiated diffuse epithelial mesotheliomas.

In differentiating diffuse epithelial mesothelioma from metastatic adenocarcinoma in pleural and peritoneal biopsies, the number and form of microvilli and the amount and distribution of tonofilaments are thought to be the most useful criteria. This report details 5 cases of diffuse epithelial mesothelioma in which the characteristic fine structural features of neoplastic mesothelial cells were markedly modified. The majority or all tumor cells were poorly differentiated in electron micrographs, particularly with reduced prominence or absence of intermediate filaments, desmosomes, intracytoplasmic lumina, and microvilli. Immunohistochemistry revealed the absence of carcinoembryonic antigen and the presence of cytokeratin in all cases. Comparison with a better differentiated case suggests cytologic details that are useful in distinguishing the poorly differentiated type of epithelial mesotheliomas from adenocarcinoma. These include a mosaic pattern of closely associated tumor cells with a few long, narrow cytoplasmic processes lying parallel to adjacent plasma membranes, abundant cytoplasm with limited organelles usually having a polar arrangement, and nuclei with markedly disaggregated chromatin and prominent nucleolonemal-type nuclei.

Biopsy↗