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PubMed2000

[Prevalence of prostatic hyperplasia and its relative factors in six cities of China in 1997].

OBJECTIVE: To study crude prevalence and distribution of the elderly prostatic hyperplasia. METHODS: Three thousand three hundred and sixty-one elderly aged 60 years and above in the urban and rural areas of Beijing, Shanghai, Guangzhou, Chengdu, Xi'an and Shenyang were investigated, using clustered random sampling methods. RESULTS: The crude prevalence of prostatic hyperplasia was found to be 43.68% with an increase with ageing (P < 0.01). The crude prevalence rates of prostatic hyperplasia among the elderly of 60-, 65-, 70-, 75-, 80-, 85- years old were 34.48%, 40.27%, 46.77%, 51.44%, 57.32% and 60.19% respectively (P < 0.01). Rates in the urban and rural areas were 46.79%and 39.64% respectively. The crude prevalence of urban areas was higher than that of rural areas (P < 0.01) and was found higher in Beijing (63.28%) and Guangzhou (54.28%), (P < 0.01). The crude rates prevalence of managers (54.88%), teachers and business men (55.17%) were in general higher than the prevalence of the workers (41.29%) and peasant (37.26%). Logistic regression analysis showed that the crude prevalence was related to ageing, profession and residential areas (P respective < 0.01). CONCLUSION: The prevalence of prostatic hyperplasia was higher in the elderly and became a common disease of the male elderly in China. Prevention and treatment of prostatic hyperplasia in the elderly should be strengthened.

Age Distribution↗
PubMed2001

[Intravascular papillary endothelial hyperplasia: multiple lesions appearing in the course of treatment with interferon beta].

INTRODUCTION: Intravascular papillary endothelial hyperplasia is a benign and rare vascular lesion. We report a case of multiple vascular lesions of the hand following 3 months treatment with beta-interferon injections for multiple sclerosis. OBSERVATION: A 50 year-old man had multiple vascular nodules of the hands. He was treated with beta interferon injections for multiple sclerosis for 3 months. Histology showed typical changes of intravascular papillary endothelial hyperplasia: papillary endothelial proliferation in a dilated cavity associated with thrombosis. DISCUSSION: Intravascular papillary endothelial hyperplasia is a benign and rare vascular lesion usually presenting as a simple nodule. It may be painful. Diagnosis is histologic, characterized by papillary endothelial proliferation associated with a thrombus within a vessel. It may be confused with hemangiosarcoma. Treatment is surgical and recurrence after treatment is rare. Intravascular papillary endothelial hyperplasia is generally considered as an unusual form of thrombus organization. Intravascular papillary endothelial hyperplasia is divided into two groups: a pure form occurring within a dilated vessel and a mixed form appearing in benign vascular lesions. The originality of this case is the rarity and the multiplicity of the lesions. The possible pathogenesis of interferon-induced cutaneous vascular lesions is discussed.

Cell Division↗
PubMed2001

Cyclosporine A-induced mammary hyperplasia and hyperprolactinemia in New Zealand White rabbits.

PURPOSE: To investigate the potential activity of cyclosporin A (CsA) to induce mammary hyperplasia in New Zealand White (NZW) rabbits. METHODS: Female NZW rabbits were used throughout experiments. To simulate the conditions of immunosuppression, CsA (10 mg/kg of body weight/d) was administered intravenously on a daily basis for 14 days and methylprednisolone (5 mg/kg/d) was administered on the first two days. The CsA (10 mg/kg/d) also was administered without methylprednisolone for 14 days to another cohort of rabbits. Mammary tissue of each rabbit was palpated and serially measured during this treatment period. The CsA was discontinued, and rabbits were monitored for 14 more days during the washout period. Sequential plasma concentrations of prolactin, 17beta-estradiol, and progesterone in each blood sample were determined by use of radioimmunoassay. RESULTS: All NZW rabbits treated with CsA and methylprednisolone for immunosuppression consistently developed striking mammary tissue hyperplasia. At the end of treatment with CsA and methylprednisolone, mammary glands had extensive changes consistent with actively lactating glands. Similar but less extensive hyperplasia developed in response to CsA alone. Plasma concentration of prolactin increased during treatment and decreased during the washout period. Plasma concentration of 17beta-estradiol increased during treatment and continued to increase during the washout period. Plasma progesterone concentration decreased at the end of treatment. On discontinuation of CsA, mammary hyperplasia regressed. CONCLUSIONS: Cyclosporine A, with or without methylprednisolone, induces mammary hyperplasia and hyperprolactinemia in NZW rabbits. This rabbit model may be a reliable in vivo system by which to study immunosuppressant-induced structural and functional changes of mammary glands similar to those observed in humans.

Animals↗
PubMedDate not supplied

Development of well-differentiated hepatocellular carcinoma in large adenomatous hyperplasia after long-term follow-up: a case report.

This report describes a 63-year-old man with a large adenomatous hyperplasia that had been followed over 10 years without any apparent change of size or profile, but grew rapidly after completion of interferon therapy. This patient was a sustained responder, in whom serum alanine aminotransferase levels remained within the normal range and the serum hepatitis C virus-RNA level was undetectable after completion of interferon therapy. However, the tumors, located in segments 5 and 8 of the liver, which had both been followed as adenomatous hyperplasia, grew rapidly two months after completion of interferon therapy; imaging modalities revealed that the former was a typical hepatocellular carcinoma and the latter a large adenomatous hyperplasia. The patient underwent right paramedian sectoriectomy of the liver. Histological examination showed that the tumor in segment 8 had mosaic proliferation of hepatocytes without fibrosis, indicating adenomatous hyperplasia, in which a small focus of well-differentiated hepatocellular carcinoma was present. This case suggests that even in sustained responders to interferon, administration of this drug cannot suppress malignant transformation of adenomatous hyperplasia to hepatocellular carcinoma. One year after surgery, the patient is doing well without signs of recurrence.

Adenoma, Liver Cell↗
PubMedDate not supplied

Hepatic focal nodular hyperplasia: the "star sign" on gadolinium-enhanced magnetic resonance angiography.

BACKGROUND/AIMS: This study aimed at presenting the three-dimensional gadolinium-enhanced magnetic resonance angiography findings of hepatic focal nodular hyperplasia with angiographic correlation. METHODOLOGY: Three patients (one had abdominal pain, two were asymptomatic) with liver mass or nodules in the liver revealed on ultrasound underwent three-dimensional gadolinium-enhanced magnetic resonance angiography. Catheter angiography was available for correlation in all three cases. Other imaging studies including conventional magnetic resonance imaging in three patients, computed tomography in two and scintigraphy scan in one were reviewed. Surgical resection and biopsy were performed in one and two patients respectively. RESULTS: The ultrasound, computed tomography, magnetic resonance and scintigraphy findings were non-specific for focal nodular hyperplasia in all three patients. However, gadolinium-enhanced magnetic resonance angiography demonstrated tumor vessels radiating from its center to the periphery, which corresponded to the spokes of the characteristic "spoke-wheel" pattern on catheter angiography, producing the so called "star sign," that may suggest the diagnosis of focal nodular hyperplasia. Histopathologic examinations revealed focal nodular hyperplasia. CONCLUSIONS: This report highlights the usefulness of gadolinium-enhanced magnetic resonance angiography in the diagnosis of hepatic focal nodular hyperplasia by demonstrating the "star sign" and that computed tomography, scintigraphy, and catheter angiography may thus be obviated in such instances.

Adolescent↗
PubMed1975

[Ventricular cord hyperplasias of the larynx-pathogenesis and treatment (author's transl)].

Primary hyperplasia of the ventricular cords can produce voice disturbance or can be a secondary change caused by a primary voice disorder. Primary hyperplasia, besides inflammation or tumour, arises in aging people by a metaplastic process of the glandular epithelium of the ventricular cords. These lesions are called "grandular-cystic ventricular cord hyperplasias". Secondary hyperplasias are mainly of a fibrous nature. These "fibrous-vicarious hyperplasias" arise in hyperkinetic functional voice disorders, in pareses or in some cases of extensive chronic hyperplastic or oedematous laryngitis if the vocal cords can no more be used for normal phonation. Endolaryngeal microsurgical excision from the ventricular cords followed by voice exercises enables us to treat the "ventricular cord voice" successfully within a short time.

Aging↗
PubMed2002

Neointimal hyperplasia rapidly reaches steady state in a novel murine vein graft model.

OBJECTIVE: Neointimal hyperplasia remains a principal cause of vein graft failure. Genetic contributions to vein graft neointimal hyperplasia could be well studied in the mouse; however, surgical approaches to vein bypass surgery in the mouse have yet to replicate approaches commonly employed in human patients. Consequently, the goal of this study was to develop a murine interposition vein graft model that reproduces characteristics of human vein graft disease. METHOD: Using C57BL/6J mice, we excised inferior venae cavae (IVCs) from donor mice and grafted them, with end-to-side anastomosis, into the carotid circulation of recipients. IVC grafts were harvested from 3 to 56 days postoperatively, and analyzed for the development of neointima and media. RESULTS: Thickening of both the vein graft neointima and media progressed rapidly between postoperative weeks 1 and 4, and reached steady state levels by approximately week four, with a graft-wall thickness of 91 +/- 4 microm (14 cell layers), a lumen area of 0.56 mm(2), an average neointima-media ratio of 0.4 to 0.6, and a predominance of alpha-smooth muscle actin-staining cells. Comprising predominately smooth muscle actin-expressing cells, the neointima was 50% thicker in the proximal than in the distal third of the grafts (P <.001), but proximal and distal vein graft anastomoses were widely patent. CONCLUSIONS: In syngeneic murine carotid interposition IVC grafts implanted with end-to-side anastomoses, moderate, nonocclusive neointimal hyperplasia reaches steady state after the fourth postoperative week. This neointimal hyperplasia, like that of human grafts, predominates near vein graft anastomoses. This vein graft model should facilitate genetic analyses of the pathogenesis of neointimal hyperplasia.

Anastomosis, Surgical↗
PubMed2002

[An experimental study(I) on the inhibition of prostatic hyperplasia with extract of seeds of Brassica alba].

OBJECTIVE: To study the effective fraction of the extract of seeds of Brassica alba, which inhibits experimental mice prostatic hyperplasia. METHOD: An experimental model of prostatic hyperplasia of castrated male mice induced by testosterone propionate was made. Fractions I, II and III were prepared by extracting the seeds of Brassica alba successively with ether, ethanol and water under reflux. Total extract was prepared by extracting the seeds of Brassica alba with 60% ethanol under reflux. The total extract and the three fractions were used to test the activities. RESULT: Total extract, fractions I and II could not only significantly inhibit mice prostatic hyperplasia induced by testosterone propionate and activity of serum acid phosphatase, but also decrease wet weight of preputial glands, while fraction III is inactive. CONCLUSION: Extract from seeds of Brassica alba can significantly inhibit mice prostatic hyperplasia induced by exterior hormone, possessing an activity of anti-androgen. Fractions I and II show an equivalent activity of total extract, which indicate that these fractions contain active components of seeds of Brassica alba which can inhibit prostatic hyperplasia.

Acid Phosphatase↗
PubMedDate not supplied

Pre- vs postoperative pharmacologic inhibition of platelets: effect on intimal hyperplasia in canine autogenous vein grafts.

Several clinical studies have shown that pharmacologic inhibition of platelets can increase the patency of vascular grafts, but only if platelet-inhibition is initiated before surgery. This study was performed to compare the efficacy of pre- vs postoperative platelet-inhibition on the development of intimal hyperplasia in canine autogenous vein grafts. Reversed femoral veins were used to bypass the ligated femoral arteries in 15 dogs. End-to-side anastomoses were constructed. Eleven dogs were treated with aspirin (325 mg QD) and dipyridamole (25 mg BID). In six dogs treatment was begun 48 hours preoperatively and continued for 3 months. In five other dogs treatment was begun 48 hours after surgery and was continued for 3 months. In 4 control dogs no antiplatelet treatment was given. Excision of the vein grafts 3 months after surgery disclosed reduced intimal hyperplasia (p < 0.05) in the grafts excised from all of the treated animals as compared with those obtained from the control animals. However, there was no difference in intimal hyperplasia observed in the dogs treated both pre- and postoperatively (11 grafts) as compared with those treated only postoperatively (9 grafts). These data demonstrate that it is not necessary to begin antiplatelet therapy preoperatively in order to inhibit intimal hyperplasia. They also suggest that preoperative antiplatelet therapy may improve early graft patency by directly preventing thrombosis, not by inhibiting the development of intimal hyperplasia.

Analysis of Variance↗
PubMed1992

Role of endocrine, autocrine, and paracrine interactions in the development of mammary hyperplasia in Wnt-1 transgenic mice.

The Wnt-1 proto-oncogene is transcriptionally activated by mouse mammary tumor virus in mouse mammary tumor virus-induced tumors. Previous studies using transgenic mice showed that Wnt-1 expression in mammary gland causes alveolar hyperplasias which resemble mammary glands of pregnant mice. To understand the role of mammogenic hormones in the genesis of these hyperplasias, we examined the development of these glands before puberty in young transgenic mice and the effects of ovariectomy and adrenalectomy on the growth and morphology of Wnt-1 mammary hyperplasia. Mammary glands of Wnt-1 transgenic females showed hyperplastic morphology as early as 1 week after birth. The normal structure of the uterus of the adult Wnt-1 virgin mouse indicated that the circulating levels of ovarian hormones were not elevated. Ovariectomy and adrenalectomy had no obvious effect on the morphology of these mammary hyperplasias. To assess possible paracrine stimulation of mammary epithelial cells (MEC) by stromal cells, we transplanted MEC from normal BALB/c mice into gland-free fat pads of Wnt-1 transgenic mice and found that normal MEC maintained their normal ductal structure in Wnt-1 fat pads without alveolar development. Further, we did not detect Wnt-1 mRNA expression in the gland-free fat pads of these transgenic mice. When Wnt-1 MEC were transplanted into the fat pads of nude mice and allowed to grow towards existing normal MEC, the morphology of the existing normal MEC remained normal. We concluded that the development of mammary hyperplasia in Wnt-1 transgenic mice is solely dependent on Wnt-1 expression in MEC. We speculate that Wnt-1 may be a growth factor for mammary gland that only acts locally on the cells that produce it.

Adrenalectomy↗
PubMed2003

Persistent mammary hyperplasia in FVB/N mice.

The inbred FVB/N mouse strain is widely used for creating transgenic mice. Over the past decade, persistent mammary hyperplasia has been detected in many multiparous FVB/N female mice sent to the University of California, Davis (UCD) Mutant Mouse Pathology Laboratory (MMPL) by a number of different laboratories. However, the experimental details concerning most specimens were not always available. To confirm these empiric findings, experiments were carried out to evaluate the mammary glands of FVB/N mice under controlled conditions. Persistent mammary hyperplasia that related to parity was found. Weeks after their first to fourth pregnancy, 10 FVB/N female mice from the Lawrence Berkeley National Laboratory (LBNL) colony were studied and the mammary glands were evaluated. The percentage of fat pad filled was estimated, using image analysis. Serum samples and the pituitary gland from other FVB/N mice from the LBNL were assayed for prolactin concentration. Multiparous FVB/N females consistently had persistent mammary hyperplasia. Four of seven females in the LBNL colony had hyperplasia after three pregnancies. A few foci of squamous nodules and sporadic carcinomas also were observed. Thus, some FVB/N females may have persistent mammary hyperplasia after three pregnancies without detectable pituitary abnormalities. Mammary carcinomas also may develop sporadically. These background phenotypes must be considered when interpreting the effect of genetic manipulation in FVB/N mice.

Animals↗
PubMed2003

A karyometric approach to the characterization of atypical endometrial hyperplasia with and without co-occurring adenocarcinoma.

OBJECTIVE: To develop a karyometric image analysis approach to distinguishing atypical endometrial hyperplasia with and without co-occurring adenocarcinoma. STUDY DESIGN: Six cases of atypical hyperplasia without and 6 cases with co-occurring adenocarcinoma, 4 cases of normal endometrium and 3 cases of adenocarcinoma were identified. From each case 100 nuclei were measured in representative diagnostic areas identified by an experienced pathologist. Discriminant analyses were performed. An unsupervised learning algorithm was applied to define and characterize different nuclear phenotypes, and those data were used to identify cases with co-occurring adenocarcinoma. RESULTS: Discriminant analysis showed that nuclei from atypical hyperplasia and atypical hyperplasia with co-occurring adenocarcinoma are statistically different. The unsupervised learning algorithm revealed differences in nuclear subpopulations that can be used to correctly identify an estimated 85% of individual cases. CONCLUSION: Nuclei from atypical hyperplasia without and with co-occurring adenocarcinoma have statistically different karyometric characteristics that may facilitate case classification.

Adenocarcinoma↗
PubMed2003

[Experimental research on spontaneous benign prostatic hyperplasia in old dogs].

OBJECTIVES: To investigate the pathoanatomize histological and biochemical characteristics of benign prostatic hyperplasia (BPH) by use of old dogs with spontaneous BPH as animal models. METHODS: Old dogs aged 6 to 13 years were recruited after anus check, B-ultrasonic examination by recta spy and measurement under surgical exploration. Ten dogs with notable prostatic hyperplasia were used as models, and 6 with non-hyperplasia prostate as control. Serum testosterone (T), estrogen (E2), ACP and prostatic specific antigen (PSA) were analyzed, and prostates were checked histologically. RESULTS: Prostate volume of the BPH group was significantly bigger than those of the control group, (14.7 +/- 2.3) and (13.8 +/- 1.9) cm3 vs (8.4 +/- 1.0) and (8.4 +/- 1.9) cm3, P < 0.01. Serum T [(14.3 +/- 2.9) vs (16.4 +/- 4.0) nmol/L] and E2 [(137.6 +/- 70.8) vs (164.4 +/- 82.0) pmol/L] were not different between the two groups (P > 0.05). ACP of the BPH group was higher than that of the control group [(6.63 +/- 2.76) vs (4.92 +/- 2.19) U/L], but the difference was not statistically significant (P > 0.05). There was significant difference between the BPH group and the control group in PSA level [(5.6 +/- 0.78) vs (3.1 +/- 0.54) microgram/L, P < 0.01]. The tissue slides of the BPH prostates showed hyperplasia with raised height of epithelium, and many long and offsetting mammillae in the gland cavity due to epithelium hyperplasia. CONCLUSION: Old dogs with spontaneous BPH are useful animal models for the etiological and pharmacological researches of human BPH.

Animals↗
PubMedDate not supplied

[Morphological correlations between endometrial hyperplasias, uterine leiomyoma and ovarian associated lesions].

Morphological evaluation and correlation of endometrial hyperplasias, leiomyoma and ovarian estrogen producing lesions. 390 specimens of hysterectomy associated or not with ovarectomy were processed by routine technique and sections stained by H&E staining. 316 cases presented different degrees of endometrial hyperplasias associated with leiomyoma. In 117 from 170 cases the ovary presented estrogen secreting lesions (follicular cyst, polycystic ovary, stromal hyperplasia, granulosa cell tumours). The highest frequency of the uterine and ovarian lesions was in the decades 41-50 years, and 31-40 years. Leiomyoma and endometrial hyperplasia, develop in a hormonal context, most frequently characterized by micropolicystic ovaries. The risk is higher in the perimenopausal period. The most frequent type is simple hyperplasia suggesting a rare progression to highest grades and a possible protective role of leiomyoma as target tissue which capture estrogens.

Adult↗
PubMedDate not supplied

[Value of steroid receptors assessment in atypical endometrial hyperplasia].

To evaluate if the immunohistochemical assessment of steroid receptors is helpful in distinguishing Atypical Hyperplasia from Well Differentiated Endometrial Carcinoma, the morphological and immunohistochemical features for steroid receptors were studied in 46 cases of atypical hyperplasia alone or associated with other degrees of hyperplasia or adenocarcinoma. The estrogen and progesterone receptors were determined by the avidin-biotin complex technique using monoclonal antibodies on paraffin embedded tissue. The diagnosis of atypical hyperplasia was based on the observation of epithelial atypias and the absence of the stromal invasion. The positive reaction for steroid receptors was moderate, very variable from case to case, heterogeneous and quite similar to that observed in carcinoma. The morphological identification of the stromal invasion is the most reliable criterion in differentiating endometrial carcinoma from atypical hyperplasia. The steroid receptors assessment is not valuable in this purpose but may be useful in cases in which a hormonal therapy is recommended.

Adenocarcinoma↗
PubMed2004

[Study of neovascularisation in endometrial cancer and hyperplasia using angio-Doppler technique].

The aim of our research work was to evaluate the neovascularisation in endometrial cancer and hyperplasia of the endometrium using "power" angio-Doppler technique. Two hundred and fifty patients /200 bulgarian and 50 patients from Greece/ with irregular bleeding, as well as women without bleeding in menopause were estimated. Age of the patients ranged between 44 and 80 years. There was not found any neovascularisation in the control group patients with normal histopathological results. The sensitivity of our method was 15% for the endometrial hyperplasia and 84% for the endometrial cancer. The specificity and the positive predictive value was for both 100%. For the endometrial cancer p < 0.06/pulsative index--PI--0.95 +/- 14, resistance index--RI--0.45 +/- 0.09, while for the endometrial hyperplasia--PI--1.40 +/- 0.25 and RI--0.65 +/- 0.20. If we summarize our results using "power" angio-Doppler technique the irregular vascularisation of the endometrium in patients with hyperplasia was found in 14%, while for the women with endometrial cancer was 85%. The analysis of the values of blood flow in the neovascularisation areas of the endometrium for level of significance PI < or = 1.0; RI < or = 5 and time-averaged maximum velocity/TAMV/ > 18 cm, may be a very important element in differentiation of benign from malignant lesions. The transvaginal ultrasonography with "power" angio-Doppler technique may serve as an important diagnostic method for differentiation of endometrial hyperplasia from endometrial cancer especially in the early stages of this malignant disease.

Adult↗
PubMed1992

Urothelial hyperplasia induced by carbonic anhydrase inhibitors (CAIs) in animals and its relationship to urinary Na and pH.

Investigations of MK-0927 and acetazolamide, both carbonic anhydrase inhibitors (CAIs), showed that urothelial hyperplasia develops in rats and mice, but not in rabbits, dogs, or monkeys. Rats given MK-0927 orally had a rapid onset of the change which regresses often completely despite continued treatment. Increased urinary pH and Na excretion, pharmacologic effects of CAIs, tended to be correlated with lesions. Rats given MK-0927 orally and fed either a 5% potassium phosphate meal or a 5% ammonium chloride meal had reduced urinary pH and/or urinary Na excretion and a reduced incidence of urothelial hyperplasia. Rats given MK-0927 orally and fed a low Na diet had very low urinary Na and essentially no urothelial hyperplasia. It was concluded that a clear relation exists between increased urinary Na excretion and pH, and urothelial hyperplasia induced by CAIs. These results in rats confirm the importance of increased Na and pH as stimuli for the development of urothelial hyperplasia.

Acetazolamide↗
PubMed1991

Hepatic adenoma and focal nodular hyperplasia.

Hepatic adenoma and focal nodular hyperplasia are benign lesions of the liver. The incidence of these conditions has been increasing since 1970. Hepatic adenoma primarily affects young women of childbearing age who have a long history of using oral contraceptives, while focal nodular hyperplasia has a wider age distribution and is not associated with the use of oral contraceptives. The most extensive complication of hepatic adenoma is intratumoral or intraperitoneal hemorrhage, which occurs in 50 to 60 per cent of patients. Patients with focal nodular hyperplasia are usually asymptomatic and rarely experience complications. Hepatic adenoma is distinct from focal nodular hyperplasia both in its clinical behavior and its pathologic features; the two can usually be differentiated radiographically using a combination of radionuclide scanning and angiography. There is a proved association between the use of oral contraceptives and the development of hepatic adenoma; the longer the duration of oral contraceptive use, the more the risk of having hepatic adenoma develop. In addition, users of oral contraceptives who have hepatic adenoma develop are likely to have larger tumors and higher rates of bleeding and rupture than nonusers who have hepatic adenoma develop. Although hepatic adenomas may regress after discontinuation of oral contraceptive use, this is not a consistent finding. In addition, it has now been demonstrated that hepatic adenomas do undergo malignant transformation and that this can be detected by measuring the alpha-fetoprotein level. Focal nodular hyperplasia may be a precursor for fibrolamellar hepatocellular carcinoma. Elective resection of hepatic adenoma has a mortality rate of less than 1 per cent, while the mortality rate with free rupture is 5 to 10 per cent. Because of the relative safety of elective versus emergency resection and the potential for malignant change, the treatment of choice for hepatic adenoma is surgical resection.

Adenocarcinoma↗