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Y S Fu

Publications and source records attributed to Y S Fu.

At least 127 records · Page 7Linked to original sources
PubMed1983

Leiomyosarcoma of the broad ligament. A case report and literature review with follow-up.

A case of leiomyosarcoma arising in a preexisting leiomyoma of the broad ligament is presented with ultrastructural and Feulgen microspectrophotometric confirmation. This is the fourth reported case of leiomyosarcoma of the broad ligament and the second reported case to show evidence of a preexisting leiomyoma. Three of these patients died after intervals of 1, 7, and 19 months; one is alive and well with no evidence of disease after 12 years. The definitive evidence of malignant transformation of a leiomyoma has particular relevance to the controversy regarding the relationship of uterine leiomyosarcomas and leiomyomas.

Aged↗
PubMed1982

Intraepithelial squamous lesions of the vulva: biologic and histologic criteria for the distinction of condylomas from vulvar intraepithelial neoplasia.

We reviewed 65 intraepithelial lesions of the vulva and distal vagina and compared the presence of koilocytosis, abnormal mitoses, and parabasal or basal nuclear enlargement with DNA microspectrophotometric distribution patterns and the presence of human papillomavirus antigen as determined by immunoperoxidase. Abnormal mitoses and cytologically atypical nuclear enlargement were specific predictors of aneuploidy and were reliable for distinguishing vulvar intraepithelial neoplasia (VIN) from condylomas. Koilocytosis was present in 100% of condylomas and 71% of aneuploid (VIN) lesions, but there were qualitative and quantitative differences in the distribution of koilocytic cells in the two classes of lesions. On the basis of these findings, criteria for distinguishing between VIN and condyloma are proposed.

Antigens, Viral↗
PubMed1982

Adenocarcinoma and mixed carcinoma of the uterine cervix. I. A. clinicopathologic study.

Ninety-two primary glandular neoplasms of the uterine cervix, including 51 endocervical adenocarcinomas, four endometrioid carcinomas, and 37 mixed carcinomas, were reviewed to define the biologic significance of pathologic features. Pure adenocarcinomas were found to have a better prognosis from mixed carcinomas of comparable stage (overall five-year survival rate, 49 vs. 36%). Endocervical adenocarcinomas with glandular and papillary patterns had a better prognosis than mucinous adenocarcinomas. When mixed carcinomas were separated into mature, signet-ring, and glassy-cell types, patients with the glassy-cell type had a better five-year survival rate than patients with the other types. However, the long-term prognosis was equally poor. The degree of differentiation as determined by the nuclear features was useful in predicting the outcome in patients with adenocarcinomas. Although the number of cases was small, combined surgery and radiotherapy achieved the best long-term survival for patients with pure adenocarcinomas. This was less apparent for mixed carcinomas.

Adenocarcinoma↗
PubMed1982

Adenocarcinoma and mixed carcinoma of the uterine cervix. II. Prognostic value of nuclear DNA analysis.

The prognosis of the glandular neoplasms of the uterine cervix is related to the clinical stage and, to a lesser extent, to the histologic type, growth pattern, and degree of differentiation of the neoplasms. To determine further the prognostic significance of the stem cell ploidy levels as determined by nuclear DNA quantitation, the authors separated the tumors into low ploidy (less than 3N) and high ploidy (greater than 3N) groups. Of the clinical Stage I and II neoplasms, low ploidy tumors had a better prognosis than high ploidy tumors of comparable stage. Low ploidy tumors had a better prognosis than high ploidy tumors irrespective of the degree of differentiation. Mixed carcinomas had a poorer prognosis than pure adenocarcinomas of comparable clinical stage. This might be explained by the greater proportion of high ploidy stem cells in mixed carcinomas than in pure adenocarcinomas. Although advanced clinical Stage III and IV neoplasms had a poor outlook regardless of the DNA ploidy level, there was a proportional increase of high ploidy tumors with increasing clinical stage. These findings suggest that cervical granular neoplasms having high ploidy stem cell lines are biologically more aggressive than those with low ploidy stem cell lines.

Adenocarcinoma↗
PubMed1982

Vulvar intraepithelial neoplasia: correlation of nuclear DNA content and the presence of a human papilloma virus (HPV) structural antigen.

Immunoperoxidase localization of a human papilloma virus structural antigen (HPV) was attempted in 68 intraepithelial lesions of the vulva, 39 of which were analyzed for nuclear DNA content by microspectrophotometry. Overall, 5.9% (4/68) stained positive for HPV. Ninety percent (35/39) of the cases tested were aneuploid, and, of these, 2.8% (1/35) stained positive for HPV. In contrast, 50% (2/4) of the polyploid lesions were positive. Hence DNA microspectrophotometry and immunoperoxidase localization of HPV are useful coparameters for distinguishing wart virus infection (condylomata) from vulvar intraepithelial neoplasia. HPV is detected infrequently within aneuploid lesions, in keeping with the concept that epithelial maturation is required for virion assembly. Whether the HPV genome exists in a nonreplicative state within the aneuploid cell population is unknown.

Antigens, Viral↗
PubMed1982

Experimental Yersinia pestis infection in rodents after intragastric inoculation and ingestion of bacteria.

To clarify the pathogenesis of oral plague infection, we studied the susceptibility of three species of rodents to intragastric inoculation of Yersinia pestis, described the pathology and progression of infection, and measured antibody responses to fraction IA antigen of Y. pestis. The 50% lethal doses of bacteria by intragastric inoculation for Mus musculus, Zygodontomys pixuna, and Rattus rattus were log10 = 6.32, 5.46, and 9.62, respectively, which were at least 1,000-fold higher than the values obtained by subcutaneous inoculation. M. musculus was shown to be susceptible to lethal infection also when bacteria were ingested in drinking water. Microscopic pathology was consistent with heavy systemic infection. Quantitative cultures of tissues at different times after intragastric inoculation revealed that infections of blood, liver, and spleen preceded infections of Peyer's patches and mesenteric lymph nodes. Stool cultures were negative. The strain of Y. pestis used for inoculation was killed when exposed to a buffered solution at pH less than or equal to 3. Antibody responses were observed in some of the surviving rodents after intragastric challenge. These results showed that Y. pestis was an effective oral pathogen that produced fatal systemic infections and self-limited infections with immunity but did not produce enteric pathology or lead to fecal excretion of bacteria.

Animals↗
PubMed1982

DES and CIN.

Explore the source record for details and available documents.

Diagnosis, Differential↗
PubMed1982

Morphometric study of intraepithelial neoplasia of the uterine cervix.

Treatment failure for intraepithelial neoplasia of the uterine cervix following electrocautery, cryosurgery, or carbon dioxide laser therapy is related primarily to incomplete eradication of the lesion. This may be due to the depth of crypt involvement, the linear extent, or the location of the abnormal epithelium. In view of this, the extent (depth and linear extent) and the location of cervical intraepithelial neoplasia (CIN) in 319 cervical cone specimens were analyzed. There is a significant correlation between the severity and the extent of the change. The mean depths of CIN I, II, and III were 0.42 +/- 0.28, 0.93 +/- 0.71, and 1.35 +/- 1.15 mm, respectively. The mean linear extents for CIN I, II, and III were 4.10 +/- 2.84, 5.84 +/- 4.13, and 7.60 +/- 4.32 mm, respectively. To eradicate 99.7% of CIN III lesions, it is necessary to destroy the tissue up to 4.80 mm in depth and of sufficient linear extent. While most lesions (87.2%) involved the transformation zone, 9.7% were higher in the cervical canal and 3.1% were located in the ectocervix. Appropriate cytologic samples, endocervical curettage, and colposcopic examination should be employed in evaluating the CIN, and strict criteria should be followed in selecting the patients for conservative management.

Adult↗
PubMed1981

Induction of uterine cancer with inactivated herpes simplex virus, types 1 and 2.

A series of studies were performed to evaluate the oncogenic potential of inactivated herpes simplex viruses types 1 (HSV-1) and 2 (HSV-2) in the mouse cervix. HSV-1 or HSV-2 prepared in HEp-2 cell cultures and inactivated by exposure to formalin or ultraviolet light was applied to the mouse cervix for periods ranging from 20 to 90 weeks. Control mice were exposed for the same period to control fluids. Vaginal cytologic preparations from all animals were examined weekly to detect epithelial abnormalities. Animals were sacrificed and histopathological studies were carried out when cellular changes seen on vaginal smears resembled those indicative of premalignant or malignant changes as previously established in a similar model system using coal tar hydrocarbons. Other animals were exposed for periods up to 90 weeks, or until there was cellular evidence of invasive cancer. Cytologic and histologic materials were coded and evaluated without knowledge of whether they were from virus-exposed or control animals. Premalignant and malignant cervical lesions similar to those that occur in women were encountered in 78 to 90% of the virus-exposed animals. All controls were normal. Invasive cancer was detected in 24 to 60% of the animals and dysplasia was found in 18 to 66%. The yield of invasive cancer was twice as great after exposure to ultraviolet-inactivated HSV-2 as compared with formalin-inactivated virus. Various histologic grades of carcinoma of the cervix and endometrium were found. No primary lesions were found in the vagina or ovaries.

Adenocarcinoma↗
PubMed1981

Nuclear DNA study of vulvar intraepithelial and invasive squamous neoplasms.

In this study, 59 vulvar intraepithelial squamous neoplasms (8 atypia and 51 carcinoma in situ) and 33 invasive squamous carcinomas were analyzed for their nuclear DNA content using Feulgen microspectrophotometry. Four cases of atypia had a polyploid DNA distribution. The remaining 4 cases of atypia and all cases of carcinoma in situ had an aneuploid pattern, and nearly two thirds of these had high ploidy stem cells (greater than 3N). This is in contrast to the low ploidy stem cells (less than 3N) seen in 70% of the invasive carcinomas and in 82% of the intraepithelial neoplasms in the vicinity of invasive carcinomas. This observation suggests that not all vulvar intraepithelial neoplasms have the same propensity to become invasive. Invasive carcinomas of comparable size and depth of invasion with low ploidy stem cells had a higher frequency of lymph node metastasis than those having high ploidy stem cells. The significance of nuclear DNA findings related to gynecologic neoplasms is discussed.

Aneuploidy↗
PubMed1981

Multicentric nature of vulvar carcinoma in situ.

A detailed histologic and DNA-microspectrophotometric study is presented of 31 lesions selected from 12 of 65 patients with vulvar carcinoma in situ whom the authors have seen. In 6 patients the lesions were multicentric and in 6 they were confluent. The purpose of the study was to determine whether or not there was a measurable biologic difference between these 2 distinctly different clinical lesions that would justify separating them into different categories. A hypothesis as to the clonal evolution of multicentric and confluent vulvar carcinoma is presented based on the authors' findings.

Carcinoma in Situ↗
PubMed1980

Non-epithelial tumors of the nasal cavity, paranasal sinuses and nasopharynx: a clinico-pathologic study XI. fibrous histiocytomas.

As part of our review of non-epithelial tumors involving the nasal cavity, paranasal sinuses, and nasopharynx, nine fibrous histiocytomas (FH) are reported. FH probably are derived from undifferentiated mesenchymal stem cells that have the ability to differentiate into two different pathways, one fibroblastic and the other histiocytic. The proportion of these two different elements varies greatly in different lesions. The cell population ranges from cytologically benign (small bland nuclei and no mitoses) to overtly malignant (marked anaplasia and numerous mitoses). Based on our cases and on 12 previously reported tumors, FH involving the upper respiratory passages may cause clinical problems similar to those produced by other soft tissue neoplasms affecting this area, (nasal obstruction, a mass or swelling in the involved area, epistaxis, loosening of teeth, or facial pain). Physical examination may show a mass projecting into the nasal, sinus, or oral civity; facial asymmetry; proptosis; or a periorbital mass. Radiographic studies may demonstrate sinus opacification or cloudiness, a mass, or bone destruction. Treatment has included polypectomy, wide local excision, partial maxillectomy, or radical maxillectomy, depending on the size and extent of the lesion. When involving the upper respiratory passages, FH, if incompletely excised, may recur locally, requiring a more extensive resection. A minority of these tumors have metastasized via lymphatic and/or venous channels. Histologic features appear to correlate with clinical course.

Adolescent↗
PubMed1980

Carcinoma in situ of the vulva: a continuing challenge.

The epidemiologic data, clinical features, associated diseases, and histologic characteristics present in 50 cases of carcinoma in situ of the vulva are analyzed. A comparison of follow-up results obtained with various treatment methods is presented. With primary surgery the recurrence rate is dependent on the presence or absence of tumor at the surgical margins. Deoxyribonucleic acid patterns, determined by microspectrophotometry, were aneuploid in 92% of the cases studied. Five patients (10%) with aneuploid lesions, observed without therapy, experienced spontaneous regression of tumor and replacement of abnormal areas by euploid epithelium.

Adolescent↗
PubMed1980

A clinicopathologic study of vagina and cervix in DES-exposed progeny.

In this survey of 210 women with a history and/or gross changes of the cervix and vagina characteristic of DES exposure, changes related to vaginal adenosis were correlated with age. The mean age of women with columnar epithelium alone was 18.5 +/- 3.2 years, columnar epithelium with squamous metaplasia was 20.2 +/- 3.4 years, and squamous metaplasia alone was 23.0 +/- 2.7 years. These findings suggest that involution of vaginal adenosis occurs with increasing age. Involution of glands in the superficial stroma in most cases occurred concurrently with that of surface columnar epithelium. However, those deeply seated and complex glands in the stroma might lag in the metaplastic process and might persist. The pitfalls of misinterpretation of squamous cell changes in histologic samples were discussed. The lack of correlation between the colposcopic findings of mosaicism and/or punctuation and squamous cell neoplasia was confirmed in this study.

Adolescent↗
PubMed1979

Nonepithelial tumors of the nasal cavity, paranasal sinuses and nasopharynx: a clinicopathologic study. X. Malignant lymphomas.

In our series of 256 nonepithelial tumors involving the nasal cavity, paranasal sinuses and nasopharynx, 21 were apparently primary malignant lymphomas, including 17 ordinary lymphomas and 4 cases of "midline malignant reticulosis." Of the 15 patients who had ordinary lymphomas and had adequate follow-up, 8 died of lymphoma, 4 were living with disseminated disease, 1 died of other causes with persistent lymphoma and only 2 (13%) had no evidence of recurrence at 8 and 9 years after diagnosis. The tumor was controlled in its primary site by radiotherapy in 13 of 14 patients; however, all but 2 of these patients eventually developed disseminated disease. Of the 3 patients who had midline malignant reticulosis (MMR) and had adequate follow-up, all died of disease. MMR represents an unusual variant of malignant lymphoma and often produces the clinical picture of lethal midline granuloma.

Adult↗