Proliferative diabetic retinopathy: Role of bevacizumab in decreasing the occurrence of vitreous hemorrhage after panretinal photocoagulation.

PURPOSE: To investigate the beneficial effect of bevacizumab injection one week prior to panretinal photocoagulation (PRP) on the occurrence of vitreous hemorrhage (VH) following PRP in high-risk proliferative diabetic retinopathy (PDR). METHODS: This was a case-control pilot study conducted on two groups: an anti-VEGF treatment group, treated with bevacizumab injection one week prior to the first PRP session, and a control group of treatment-naive PDR patients who underwent PRP treatment and were not given an intravitreal bevacizumab injection, consecutively recruited. In both groups, a complete ophthalmological examination was conducted prior to PRP and at 4, 9, and 16 weeks following treatment. The primary endpoint studied was the occurrence of VH. RESULTS: The control group included 69 patients (mean age 63±12.3 years) with high-risk PDR who received PRP treatment only, and the anti-VEGF treatment group included 67 patients (mean age 63.13±10.3 years). None of the demographic variables or comorbidities showed any significant difference between the two groups. The number of PRP sessions was not significantly correlated to the occurrence of VH in either of the groups (P=0.167). Vitreous hemorrhage within 16 weeks following laser treatment occurred in 10 patients (14.5%) in the control group and in only 3 patients (4.5%) in the anti-VEGF group (P=0.047). CONCLUSION: Our case-control pilot study demonstrates that a bevacizumab injection preceding the initial PRP session might be beneficial in reducing the occurrence of VH in the first 16 weeks following PRP.

Practical guidance in the conduct of a scoping review: Insights from experience in the College of Public Health, University of the Philippines Manila

Objective@#We aimed to provide practical guidance on the scoping review process, building on the methodologies and general steps outlined by Arksey and O’Malley, Levac et al. and The Joanna Briggs Institute. @*Methods@#We reviewed the methodologies of three scoping studies conducted by the authors in the College of Public Health, University of the Philippines Manila between 2016 and 2017. For each project, we outlined the steps, tools utilized, good practices performed, challenges encountered, and recommendations for improving the scoping review process in relation to existing guidelines. We compared the similarities and differences across the three reviews and guidelines to come up with a list of good practices and recommendations. @*Results@#We propose an expanded 10-step and iterative framework based on our analysis of three scoping studies: Define your research question; 2. Specify your research statement according to population, concept, and context; Prepare the necessary tools, forms, and software packages; 4. Assemble your expert panel and/or consultants; Develop your search strategy; 6. Implement the search strategy and retrieve identified studies; 7. Screen and assess studies for inclusion in the scoping review; 8. Chart the data; 9. Synthesize your results; and 10. Prepare your final report. @*Conclusion@#Scoping reviews as a method of evidence synthesis are increasingly gaining popularity among researchers due to the scope of what can be reviewed in a relatively short amount of time. With only three scoping studies informing our proposed methodology, other issues and challenges in the conduct of a scoping review may have been missed in the expanded framework presented in this paper. We suggest future studies to apply existing scoping review methodologies, to further enhance this rapidly evolving framework in research, policy, and practice.

Facilitators and barriers to implementation of the Pharmacy DOTS Initiative in selected project sites in the Philippines

@#<p style="text-align: justify;"><strong>Objectives:</strong> The Pharmacy DOTS Initiative (PDI) was relaunched on a larger scale in 2014 through the Innovations and Multi-Sectoral Partnerships to Achieve Control of Tuberculosis (IMPACT) project. This paper aimed to assess the PDI program through IMPACT by identifying the facilitating and hindering factors in its implementation. The identified factors are classified as to the affected stakeholders or processes.</p><p style="text-align: justify;"><strong>Methods:</strong> Semi-structured interviews were conducted with the PDI Program Manager and four NTP coordinators from selected project sites. Thematic analysis was done to determine the recurring facilitating and hindering factors as identified by the key informants.</p><p style="text-align: justify;"><strong>Results:</strong> Facilitating factors identified include cooperation of the stakeholders, capability-building and a good referral system. The barriers to the implementation were grouped into patient-related, pharmacy-related, health center-related, program-related as well as external factors.</p><p style="text-align: justify;"><strong>Conclusion:</strong> The referral system created through PDI facilitated the flow of referrals starting from the pharmacy. This enabled presumptive patients to have access to health facilities for TB. Hindering factors contributed to the inability of the engaged pharmacies to sustain their consistency and commitment in conducting the PDI interventions.</p><p style="text-align: justify;"><strong>Key Words:</strong> barriers, facilitators, tuberculosis, directly observed therapy, program evaluation, pharmacy</p>

Perception of program administrators and student representatives on the implementation of return service agreement in selected institutions in the Philippines

Objectives@#The study aimed to determine the perception of program administrators and students on the implementation of return service agreement (RSA) in the Philippines. It examined the different components of, and opportunities, and challenges in the implementation of RSA of selected institutions.@*Methods@#Key informant interviews using a topic guide were conducted with ten program administrators and student representatives from selected institutions implementing a return service policy. Interviews were transcribed and responses in Filipino were translated to English. Open coding and focused coding were performed to identify categories and themes from the interview transcripts.@*Results@#Addressing human resource for health (HRH) needs of the country is a common rationale behind RSA implementation among the institutions sampled for the study. A notable difference in implementation arrangements is the manner of rendering service. Majority of RSA programs require promisors to be employed in any part of the Philippines in need of health workers, while other RSA programs recruit students from rural areas in order to deploy them later on in their hometowns. There is also an apparent lack of institutionalized mechanisms for job placement for students to fulfill their return service obligations. One challenge in most institutions is the need for a formal monitoring and evaluation scheme for the policy.@*Conclusion@#Integration of the voice of stakeholders is critical in the conceptualization, development, and implementation of RSA policies. This will ensure that issues attendant to operationalization are mitigated if not outrightly avoided.

Outputs and Outcome of the Pharmacy Directly-Observed Treatment Short-Course (DOTS) Initiative in the Philippines

@#<p><strong>OBJECTIVE:</strong> This was an evaluation of the effectiveness of the technical assistance package for the Pharmacy DOTS Initiative (PDI) in the Philippines.</p><p><strong>METHODOLOGY:</strong> Five pre-identified implementation sites were included in the evaluation. A survey was conducted to ascertain pharmacies currently implementing PDI and the number of TB presumptive cases referred by these pharmacies. Data abstraction was performed to determine the change in the number of TB cases seen by local TB programs after its implementation.</p><p><strong>RESULTS:</strong> Findings revealed that the proportion of pharmacies actively referring presumptive TB patients is not significantly lower than 60% (p=0.1892). Furthermore, results showed that the average monthly referrals were not statistically lower than 20 clients per month (p=0.9159). Nevertheless, interrupted time series analysis found no statistically significant immediate effects (p=0.516) and long-term effects (p=0.3673) on the total number of new TB cases identified after the PDI was implemented in the year 2014.</p><p><strong>CONCLUSION:</strong> The PDI was able to achieve outputs related to pharmacy engagement and referral of TB presumptive clients. However, the PDI was unsuccessful in increasing the actual number of TB presumptive cases seen by local TB programs in its implementation sites.</p>

Secondary intraocular lens implantation with absence of capsular support: Scleral versus iris fixation.

PURPOSE: To assess the outcomes of iris fixated (IF) posterior chamber (PC) intraocular lens (IOL) versus scleral-fixated (SF) PC IOL implantation, and compare them with the results reviewed from the literature. SETTING: The study took place in the ophthalmology department of the Eye and Ear Hospital (Lebanon). DESIGN: This is a retrospective institutional study that collected the records of patients admitted for secondary IOL implantation between January 2007 and December 2016. METHODS: A total of 28 eyes that underwent PC IOL fixation were included, 13 of which underwent trans-scleral PC IOL fixation and 15 of which underwent iris PC IOL fixation. Data were analyzed over a period of 3 years. RESULTS: Of the 28 patients, 18 (64.3%) were male and 10 (35.7%) were female (mean age at intervention 36.78±23.47 [standard deviation, SD] years). There were no significant intergroup differences with regard to baseline values and demographic characteristics. Trauma was the most common etiology for posterior capsule insufficiency (82.1%). The mean preoperative baseline BCVA was 0.58±0.27 logMAR for SF and 0.27±0.20 logMAR for IF (P=0.07). Both groups had significant improvement in vision during the follow up period. No significant differences were noted regarding early or late postoperative complications between the two groups. CONCLUSION: SF and IF techniques for PC IOL have similar outcomes and result in a significant improvement in BCVA. When compared to AC (anterior chamber) IOL, both techniques seem to yield fewer complications.

Use and non-use values as motivational construct dimensions for farm animal welfare: impacts on the economic outcome for the farm.

This study explored how farmers' motivation in terms of use values and/or non-use values to work with farm animal welfare are associated with the economic outcome for the farm. Use values in farm animal welfare refer to economic value derived from productivity and profitability considerations. Non-use values in farm animal welfare refer to economic value derived from good animal welfare, irrespective of the use the farmer derives from the animal, currently or in the future. The analysis was based on detailed information about the income statements of a sample of Swedish dairy farmers, obtained from the Swedish Farm Economic Survey, complemented with survey information about their perceived use and non-use values in farm animal welfare. The findings suggest that farm economic outcome is significantly associated with motivation in terms of use values, but not so much with motivation in terms of non-use values. This is interesting from a policy point of view, because it indicates that farmers with different approaches to farm animal welfare may experience different economic outcomes for their farms. Findings can, for instance, be used to strengthen farmers' engagement in various private quality assurance standards, which generally focus on values of non-use type, by pointing to that realisation of such values will not impair the economic outcome of the farms. Moreover, findings also suggest that farmers' economic incentives for engagement in such standards may need to be further strengthened in order to become more attractive, as findings point to that a focus on non-use values generally is not associated with more favourable economic outcomes.

A historical perspective of the mandatory service policy in the Philippines: A document analysis

@#<p><strong>BACKGROUND</strong>: The Philippines has, mandatory service policies to address the insufficiency and maldistribution of human resources particularly for health services. Despite being perceived as an appropriate intervention to bridge the aforementioned HRH gaps, the past and present implementations of such programs in the country have never been formally studied.</p><p><strong>OBJECTIVE</strong>: This paper aimed to present the history of mandatory service programs in the Philippines, look at their natures, and see how their different implementations relate to each other.</p><p><strong>METHODOLOGY</strong>: Using a qualitative document analysis method, administrative issuances and reports relevant to past and current implementations of mandatory service policies in the Philippines were obtained and reviewed.</p><p><strong>RESULTS</strong>: Mandatory service programs have been implemented in the country by institutions from both the private and public sectors as early as 1968. The focus of such has been mostly for government positions and specialized professions including physicians and scientists. While extensive efforts have been made through the years, the policies demonstrated fragmentation and recurring gaps in implementation. Such gaps include the lack of enabling policy mechanisms, formal monitoring and evaluation, and program institutionalization.</p><p><strong>CONCLUSION</strong>: The historical narrative of return service programs in the country is a potential source for the development of an overarching mandatory service policy framework for human resources in the Philippines, one that is specific to the context and setting of the country. By articulating policy issues identified, this paper provided a stepping-off point for future mandatory service program policy planning, implementation, evaluation, and institutionalization in the Philippines.</p>

Ahmed glaucoma valve in various etiologies of refractory glaucoma: Surgical outcomes and success factors.

PURPOSE: To study the epidemiology and mid-term results of the Ahmed glaucoma valve (AGV) in various etiologies of refractory glaucoma in a Lebanese center, and to assess complications and factors that influence the surgical success rate. METHODS: In this retrospective epidemiological study, we reviewed 108 eyes with refractory glaucoma that underwent an AGV implantation in a tertiary care center in Lebanon between January 2002 and August 2014. Findings including best-corrected visual acuity (BCVA), intra-ocular pressure (IOP), number of antiglaucoma medications, factors influencing the surgical outcome, success rate and complications were also reviewed. RESULTS: The mean duration of follow-up was 29.85±21.45 months [range, 3-60 months]. As in other Arab countries and compared to the rest of the world, the rate of neovascular glaucoma (NVG) was particularly high, occurring in 63 eyes (58.3%), and represented the primary cause of refractory glaucoma. Mean IOP was significantly reduced to 17.97±7.35mmHg at the last follow-up visit (P<0.05). Similarly, a significant decrease was noted in the number of antiglaucoma medications (P<0.05). The surgical success rate, defined as a postoperative IOP<21, was significantly higher (62.0%), in older patients, those with baseline BCVA≤2 LogMAR and those with a history of hypertension (P<0.01). Hyphema was the most noted complication. CONCLUSION: The AGV is a safe and effective procedure for lowering IOP in refractory glaucoma patients, with hyphema being the most frequent complication. Both the presence of hyperstension and initial BCVA≤2 LogMAR seem to increase the success rate of the procedure. NVG remains the most common etiology for implantation, probably due to uncontrolled diabetes in the Middle East and North Africa.

Macular pigment density variation after supplementation of lutein and zeaxanthin using the Visucam® 200 pigment module: Impact of age-related macular degeneration and lens status.

PURPOSE: To assess the evolution of macular pigment optical density (MPOD) following supplementation with various macular formulations obtained with the Visucam® 200, and to study the factors affecting MPOD measurements. MATERIALS AND METHODS: In this prospective, randomized, double-masked multicenter study, patients were divided into 2 groups: group A (patients without retinal pathology who underwent cataract surgery 1 month previously) and group B (patients with neovascular age-related macular degeneration [AMD] in one eye). In each group, half of the patients were randomly assigned to receive a food supplementation either with or without carotenoids (5mg of Lutein and 1mg of Zeaxanthin). Outcome measures included MPOD responses obtained with the Visucam® 200 for one year. RESULTS: In total, 126 subjects (52 men, 74 women) with a mean age of 75.3±7.61 years were enrolled. Mean MPOD values at the time of inclusion were statistically lower in group A (0.088 density unit [DU]) compared to group B (0.163 DU, P<0.05). No statistically significant increase in MPOD was noted in either group, even after discontinuation of the supplementation. By multiple regression analysis, age, female gender, lens status and the presence of AMD seemed to significantly affect MPOD measurements. CONCLUSION: No significant improvement in MPOD seems to be detected with the Visucam® 200 after carotenoid supplementation. The MPOD measurement seems to be highly affected by cataract extraction and the presence of AMD.

Ethnic Swedish parents' experiences of minority ethnic nurses' cultural competence in Swedish paediatric care.

BACKGROUND: Sweden has a population of a little more than 9.4 million. The rapid growth of immigration in Sweden has resulted in an increased number of minority ethnic patients and minority ethnic nurses in the Swedish healthcare system. This also applies to paediatric care. AIM: The purpose of this study was to explore how parents with ethnic Swedish backgrounds experience minority ethnic nurses' cultural competence and the care the nurses provide in a Swedish paediatric care context. METHOD: This exploratory qualitative study is of 14 parents with an ethnic Swedish background whose child was in a ward at a children's hospital in Stockholm County Council. Data were collected using semi-structured interviews to identify parents' perceptions and experiences of minority ethnic nurses' cultural competence. The interviews were analysed by qualitative content analysis. RESULTS: The analyses of the interviews led to four main categories: influence of nurses' ethnicity; significance of cross-cultural communication; cross-cultural skills; and the importance of nursing education. CONCLUSIONS: Nurses' ethnicity did not have much impact on parents' satisfaction with their child's care. The parents attached importance to nurses' language skills and to their adaptation and awareness of Swedish culture. They also attached weight to nurses' professional knowledge and personal attributes. The role of nursing education to increase nurses' cultural awareness was highlighted too.

[Primary open-angle glaucoma (POAG), retinal vein occlusions (RVO) and central corneal thickness (CCT): what is the relationship?]. / Glaucomes primitifs à angle ouvert (GPAO), occlusions veineuses rétiniennes (OVR) et pachymétrie : quelle relation ?

PURPOSE: To investigate the relationship between various types of glaucoma, retinal vein occlusion (RVO), and central corneal thickness (CCT) METHODS: We followed 48 known glaucoma patients who developed any type of retinal vein occlusion. Mean follow-up was 4.2 years. At all visits, patients had a detailed ocular history, as well as thorough bilateral evaluation, including dynamic gonioscopy, CCT measurement, retinal nerve fiber layer (RNFL) measurement by OCT, and automated visual field. Student's t-test and Chi(2) test were used to evaluate continuous and categorical data, respectively, with comparison of the means of paired series. RESULTS: Mean age at time of diagnosis was 68.1 ± 11.8 years (range 40-85 years). Six patients were black (12.5%), while the others were white (87.5%, P=0,0001). Various types of glaucoma were found in the 48 patients (22 men, 26 women, P=0.564) who developed RVO. No significant difference was found between mean CCT of eyes with RVO and fellow eyes (537.7 ± 39.8 µM and 538.4 ± 36.4 µM, respectively) (P=0.527). By stratifying our results according to the various types of glaucoma, mean CCT of involved and fellow eyes was 542.7 ± 37.6 µM and 540.6 ± 33.2 µM, respectively in the primary open-angle glaucoma (POAG) group, 530.4 ± 45.2 µM and 535 ± 43.6 µM in the chronic angle-closure glaucoma (CACG) group, 549.3 ± 24.8 µM and 558 ± 37.3 µM in the pseudo-exfoliation glaucoma (PXG) group, and 490 ± 56.6 µM and 495 ± 35.4 µM in the normal-tension glaucoma (NTG) group. CONCLUSIONS: Contrary to some recently-published studies, our results showed no statistically significant difference between CCT of eyes involved with RVO and fellow eyes. The NTG group seems to have the thinnest CCT.

Placental site trophoblastic tumor in a patient with secondary infertility and radiological findings consistent with a leiomyoma: a case report.

Placental site trophoblastic tumor (PSTT) is the rarest form of gestational trophoblastic diseases. We report a 40-year-old woman who presented initially after a year of secondary infertility with prolonged menstrual flow. Her last pregnancy ended in a suction dilation and curettage at 8 weeks' gestation for a missed abortion. A hysterosalpingogram revealed a solid 5 x 4.5 cm filling defect impinging on the endometrial cavity suggestive of a submucosal leiomyoma. A vaginal sonogram confirmed the findings. The patient underwent a laparotomy for excision of the 5-cm friable, necrotic mass that was performed by curetting. Pathologic examination of the specimen revealed sheets of intermediate trophoblastic cells characterized by large polyhedral cells and positive human placental lactogen staining consistent with PSTT. The patient eventually underwent total abdominal hysterectomy 4 weeks later with no evidence of residual tumor on histologic examination.

Class II transactivator-induced expression of HLA-DO(beta) in HeLa cells.

HLA-DO is an intracellular nonclassical MHC class II molecule expressed in the endocytic pathway of B lymphocytes. It shapes the repertoire of peptides bound to classical class II molecules such as HLA-DR by regulating the activity of HLA-DM. Using a peptide corresponding to the cytoplasmic tail of HLA-DO(beta), we have developed a mouse monoclonal antibody, HKC5. Immunofluorescence microscopy revealed that HKC5 recognizes HLA-DO molecules present in the endoplasmic reticulum as well as those in vesicular compartments of the endocytic pathway. In addition, the antibody detects the isolated beta chain on Western blots. Using mutants of the DO(beta) cytoplasmic tail fused to a reporter molecule and expressed in epithelial cells, we showed by flow cytometry that the antibody epitope includes one or both of the leucine residues forming the lysosomal sorting signal. Finally, we have used HKC5 to evaluate the presence of the HLA-DO(beta) chain in HeLa cells expressing the class II transactivator protein CIITA. Our flow cytometry and confocal microscopy analyses showed a marked expression of DO(beta) suggesting that HLA-DO could accumulate under the influence of CIITA in non-B cells.

Tamoxifen and endometrial pathologies: a prospective study.

OBJECTIVE: The purpose of this study was to prospectively follow a group of women with breast cancer, on tamoxifen, for the development of endometrial pathologies. MATERIALS AND METHODS: Eighty women with breast cancer, on tamoxifen, were prospectively followed every 6 months with pelvic examination, Pap smear, vaginal ultrasound, and endometrial biopsy. RESULTS: Nine women were lost to follow-up prior to initiation of treatment and 4 refused biopsies, leaving 67 patients for evaluation. Fifty (74.6%) of the 67 patients were already on tamoxifen for a mean duration of 15.8 +/- 16.6 months and had a baseline benign, unremarkable endometrium at the time of entry into the study. The total duration of treatment was 32.5 +/- 19.6 months (median 30 months). The mean age of the patients was 51.7 +/- 9.9 years (median 52 years). Of the patients, 56.7% were postmenopausal. Sixty-three patients had a benign endometrium (mean age 51.8 +/- 10.1 years, mean duration 33.1 +/- 19.6 months). Two patients had simple hyperplasia (mean age 43.5 years, duration 28.5 +/- 33.2 months), 1 patient had complex hyperplasia with atypia (age 57 years, duration 13 months), and another patient developed adenocarcinoma (grade 3) after 22 months. These 4 patients had abnormal vaginal bleeding. Seven patients developed endometrial polyps (mean age 54.0 +/- 8.5 years, duration 36 +/- 24.2 months). The mean endometrial thickness for patients with histologically unremarkable and abnormal endometrium was not significantly different (7.6 +/- 3.9 vs 8.8 +/- 5.0 mm, respectively) (median 7.0 mm for both groups). No endometrial thickness cutoff point reached statistical significance. The patient who developed endometrial cancer had a thickness of only 3 mm. CONCLUSION: All patients who developed an abnormal endometrium had abnormal vaginal bleeding. There was no correlation between endometrial thickness and endometrial pathology; thus the value of routine screening remains controversial.

Probing the human genome in search for a new 3q syndrome.

We report a case of partial trisomy 3q syndrome which could not be clinically identified as a distinct entity. The major clinical findings include: psychomotor delay with behavioral problems, coarse facial features, frontal bossing, bushy eyebrows, prominent ears, a small upturned nose and a history of repaired inguinal hernia. There was an additional material on chromosome 4, which could easily be matched with bands 18q21.2-q22; 2p24-p25; 16p21-p23; 10p12-p14; 20q12-q13.2; 15q25-q26.2; 8p23-p24.2 and 6p22.3-p24 and a new syndrome could apparently be suggested based on GTG techniques alone. Nevertheless, by FISH technique, the extra segment was identified as a part of 3q26.3-qter. We provide an extensive review of trisomy 3q syndrome and present a caveat of the consequences of description of new syndromes based on routine banding techniques especially in situations where the origin of chromosomal abnormalities is de novo or parents are not available for cytogenetic evaluation.

Narghile (hubble-bubble) smoking, low birth weight, and other pregnancy outcomes.

Narghile smoking, a common habit among women in many non-Western societies, is assumed by the public to be minimally harmful. This study aims at identifying the effect of smoking narghiles during pregnancy on the weight of the newborn and other pregnancy outcomes. Three groups of pregnant women were interviewed in several hospitals in Lebanon between 1993 and 1995: 106 who smoked narghiles during their pregnancy, 277 who smoked cigarettes, and 512 who did not smoke. The adjusted mean birth weight of babies born to women who smoked one or more narghiles a day during pregnancy and to women who started smoking in the first trimester was more than 100 g less than that of babies born to nonsmokers (p < 0.1). The adjusted odds ratio of having babies with low birth weight (<2,500 g) among the narghile smokers was 1.89 (95% confidence interval (CI) 0.67-5.38). The risk increased to 2.62 (95% CI 0.90-7.66) among those who started smoking narghiles in the first trimester. A stronger association and a dose-response relation were found among cigarette smokers. The association between narghile smoking and other pregnancy outcomes, especially Apgar score and respiratory distress, was also noticeable. Further research and a policy action to fight the misperception that narghile smoking is safe are both recommended.

Effects of severe hypoxemia on mesenteric blood flow in neonatal piglets.

BACKGROUND: The purpose of this work was to determine the effects of hypoxemia on systemic hemodynamic variables and regional conduit arterial blood flows in neonatal piglets. MATERIALS AND METHODS: Using transit time blood flow probes, cardiac output and cranial mesenteric artery blood flow were monitored in groups of prematurely delivered (90% of term gestational age) and 2-week-old piglets prior to, during, and after exposure to a 30-min hypoxic (FIO2 = 0.12) challenge. RESULTS: The documented alterations in systemic mean arterial pressure and cardiac output pressure during hypoxia and reoxygenation were consistent with the maturational age of the animals. In response to hypoxia, all animals demonstrated significant reductions in mesenteric blood flow, with returns to baseline levels during the 30-min reoxygenation phase. In still other prematurely delivered piglets, nutrient mesenteric arterial blood flows were measured using in vivo videomicroscopy. The marked hypoxemia-induced decline in mucosal blood flow was reversed by reoxygenation. CONCLUSIONS: The physiologic mechanisms responsible for neonatal mesenteric vasoactive responsiveness are present in conduit and in nutrient vessels well prior to birth and can be activated by a significant perturbation. These observations are germane insofar as they provide a stable, age-matched acute animal model to study neonatal intestinal ischemic diseases, including necrotizing enterocolitis.

Highly complex chromosomal aberrations in bone marrow of a patient with metastatic prostate neoplasm.

Prostate cancer is the single most common malignancy among men in North America. Nevertheless, cytogenetic evaluation of bone marrow in patients with metastatic prostate neoplasm has been rare and, to date, only five such patients have been reported. We report an additional case where chromosomal abnormalities of a bizarre nature were found in the bone marrow. Though cytogenetic findings in prostate cancer are heterogeneously complex, the chromosome regions involved include 1p, 1q, 7q, 8p, 10q, 12p, and 17q and are considered hot spots. What is the significance of these so-called hot spots in metastasis of prostatic cancer to the bone marrow? At present, no meaningful conclusion can be drawn, as data are limited, but accumulation of such cases may provide valuable information concerning the role of chromosomal abnormalities in patients--specifically with metastatic stage--and may help urologists during therapeutic decision making, particularly if a genetic marker for aggressiveness can be determined.