Tehran University Medical Journal
Year:2010 | Volume:68 | Issue:9|Papers Count:11

Osteoporosis is a condition characterized with reduced bone density and destruction of the bone structure. The ideal treatment aims to reduce the risk of fracture while improving the density and structure of the bone. Parathormone (PTH) and its main analogue triparatide (rhPTH [1-34]) is a new class of anabolic medications which accelerates the healing process in the fractured bone through improving bone formation and therefore is used for treating severe osteoporosis. The present review article was designed to report the history, different types, anabolic and catabolic effects, complications, indications and contraindications of the hormone.

Background: Skin-derived precursors (SKPs) are a type of progenitor cells extracted from mammalian dermal tissue and can be differentiate to neural and mesodermal lineage in vitro. These cells can introduce an accessible autologos source of neural precursor cells for treatment of different neurodegenerative diseases. This research was done in order to set up isolation, culture, proliferation and differentiation of human skin derived precursors (hSKPs).Methods: Human foreskin samples were cut into smaller pieces and cultured in proliferation medium after enzymatic digestion. To induce neural differentiation, cells were cultured in neural differentiation medium after fifth passage. We used immunocytochemistry and RT-PCR for characterization of the cells. Neuron and glial cell differentiation potential was assessed by immunofloresence using specific antibodies. The experiments were carried out in triplicate.Results: After differentiation, bΙΙΙ- tubulin and neurofilament-M positive cells were observed that are specific markers for neurons. Moreover, glial fibrillary acid protein (GFAP) and S100 positive cells were identified that are markers specifically express in glial cells. Detected neurons and glials were also confirmed by their morphologic characterizations.Conclusion: Our results demonstrated that skin-derived precursors obtained from human foreskin can exhibit neuronal and glial differentiation potential in vitro, depending on the protocols of induction.

Background: Uterine smooth muscle tumors classified as leiomyoma, leiomyosarcoma and tumors with uncertain malignant potential. The leiomyoma and leiomyosarcoma are separated tumors biologically. Uterine smooth muscle tumors with uncertain malignant potential include a group of tumors which are not specifically placed into two others groups which result in a serious problem in a way of their treatment. In the present study expression of marker “p16” in smooth muscle tumors of uterine and normal myometrium has been investigated.Methods: The entire paraffin blocks related to hysterectomy cases with diagnosis of normal myometrium, leiomyoma and leiomyosarcoma (3768 cases) available in pathology lab. in Shariati Hospital in Tehran, Iran from 1372 to 1387 were investigated.Among them 62 normal myometrium, 62 leiomyoma and 12 leiomyosarcoma had been chosen and after staining for marker “p16” were investigated separately.Results: There were a statistically significant difference in both intensity and percentage of staining for this marker between leiomyoma and leiomiosarcoma (p<0.001) and between leiomyosarcoma and normal myometrium (p<0.001) but not between leiomyoma and normal myometrium (p=3.6).Conclusion: Based on this study if strong and more than focal immunoreactivity for marker “p16” suppose as positive then leiomyosarcoma will be positive for this marker but leiomyoma and normal myometrium will not be and this could be considered as a good guide for categorizing the uterine smooth muscle tumors.

Background: One of the most important components of coronary artery bypass graft surgery is need for blood transfusion that increases morbidity and mortality. The aim of this study was to evaluate the factors affecting the need for blood transfusion during off pump coronary artery bypass (OPCAB) surgery.Methods: In this descriptive case control study 923 patients who had undergone OPCAB at Afshar Hospital in Yazd, Iran, from July 2008 to January 2010 were evaluated. The data was gathered from their records and was analyzed.Results: 54% of male and 79% of female patient need blood transfusion. Mean age in patients needed transfusion was 61.58±11.11 years and in other group was 60.27±10.98 years of the patients that needed transfusion (p=0.08).563 (61%) of the patients needed transfusion with the average of two units. The need for blood transfusion was higher in female gender (p<0.0001), low hematocrit (p<0.0001), diabetes (p<0.001), hypertension (p<0.025) and multiple grafts (p<0.027). There were no significant differences in preoperative hemostasis tests, affection to hyperlipidemia, CVA or renal failure, antiplatelet drug administration and the application of left internal mammary artery between the transfusion and non transfusion groups.Conclusion: In this study preoperative hematocrit was most important risk factor in transfusion in patients that underwent OPCAB. Female gender, preoperative low hematocrit, multiple grafts, diabetes and hypertension increased the rate of blood transfusion. According to the high prevalence of blood transfusion in OPCAB, considering factors that affect the transfusion rate is essential.

Background: Topically applied tranexamic acid has been shown to decrease the amount of blood loss associated with major spinal surgical procedures. The aim of this study was to evaluate the effects of locally applied tranexamic acid in epidural space on post-laminectomy blood loss.Methods: One hundred patients who were scheduled to undergo laminectomy in Imam Khomeini Hospital in Tehran, Iran were enrolled in a clinical trial. Patients were divided into two groups of unilateral one level (n=50) and bilateral two level (n=50) laminectomy according to the extent of surgery. Each group was randomly allocated into two groups of tranexamic acid (n=25) and control (n=25). At the end of the operation, 250mg tranexamic acid, with volume of 5ml or 5ml of normal saline were poured on the site of surgery. The blood volume drained during first and second 24hr, and overall hemorrhage, plus the duration of post operative hospitalization were compared between the two groups.Results: The bleeding volume in the 1st 24hr was significantly less in tranexamic acid than control group (p=0.001). The bleeding volume in the 2nd 24hr was significantly less in tranexamic acid than control group (p=0.001). The hospital stay was less in tranexamic acid compared to control group (2.16±0.37 Vs.2.96±0.89 days, p=0.001) respectively.Conclusion: Locally applied tranexamic acid in epidural space significantly reduces the amount of the 1st day, 2nd day and overall post-laminectomy blood loss, and duration of hospital stay.

Background: Recently, many cases diagnosed as pediatric autoimmune neuropsychiatric disorders associated with group A beta hemolytic streptococcus infection (PANDAS) due to production of autoimmune antibodies. Object of this study was comparison the titer of antibodies against group A beta hemolytic streptococcus (ASOT, Anti-DNase B, and Anti streptokinase) between children with movement disorders (tic and tourett’s disorders; pediatric autoimmune psychiatric disorders) and healthy control.Methods: A cross sectional/ cases control study in pediatric neuropsychology ward and clinics in two referral hospitals (Rasoul & Aliasghar) affiliated by IUMS had done in Tehran, Iran (2008-2010). We selected 53 children with tic disorder and 76 healthy controls (age matched children). The antibody titers (IU/ml) in their area were compared and analyzed statistically. The area under ROC, sensitivity, specificity and positive predictive value of tests calculated.Results: Age of cases was between 4-16 years. All antibody titers had significant difference between two groups (p<0.0001; p=0.05; p=0.002 for ASOT, Anti-DNase and Antihyaloronidase respectively). ASOT (cut off level>200IU/ml) had 75% sensitivity; 84% specificity and 80% PPV; Anti- streptokinase (cut off level>332IU/ml) had 34% sensitivity; 85% specificity, and 90% PPV; Anti-DNase (cut off level>140IU/ml) had 70% sensitivity; 99% specificity and PPV 90%.Conclusion: Patients with tic disorder had a significant high antibody titer against streptococcal infection in comparison with healthy children. It presents possible role for streptococcal infection in tic disorders. Treatment of streptococcal infection is achievable by using of long acting Penicillin in our country. Use of aggressive treatment like plasmaphresis etc needs future RCT studies.

Background: Surgery is the most effective treatment of well-differentiated endometrial cancer. But using systemic progestins, have been evaluated to treat the young patients with well-differentiated endometrial cancer who wish to preserve their fertility. The aim of this study was the evaluation of megestrol acetate on endometrial adenocarcinoma with regard to the receptors.Methods: This was a quasi-experimental study. In 16 infertile patients with stage Ia well-differentiated endometrial adenocarcinoma. The treatment initiated with 160mg/d of megestrol acetate and continued with 320mg/d for non-responsive cases. All of the patients followed with FD& C and hysteroscopy. The responsive patients were referred to IVF group and they were followed for three years.Results: Of nine patient in the first step of the study, 4 (25%) became pregnant. Eight patients underwent Total Abdominal Hysterectomy (TAH), and one was retreated conservatively. Of seven patient of second step of the study, five are under treatment at the time of closing the paper (three cases candidate for IVF and two are under 320 mg/d megestrol acetate), one patient is a candidate for hysterectomy, and one exited of study because of male infertility. All of the patients were progesterone receptor positive, and only one was estrogen receptor negative.Conclusion: Conservative treatment of early stage well-differentiated endometrial adenocarcinoma with progestins may be used in highly selected young patients who have not completed their family. Close long- term follow up in this special group of patients is necessary. The evaluation of estrogen and progesterone receptors assay may be useful in predicting response to the treatment.

Background: Botulinum toxin (Dysport) is a powerful semi-biological toxin. It has proved to be a remarkable therapeutic agent for treatment of benign anal disorders.Different results have been achieved from injection of botulinum toxin in order to treatment of anal fissure since 1993. The aim of this study was to evaluate the efficacy of botulinum toxin injection in the treatment of chronic anal fissure Comparing with lateral internal anal sphincterotomy (LIS).Methods: 36 patients entered into two groups, Dysport injection and Lateral Internal Sphincterotomy, randomly. Dysport group were treated by injection of 50 units of botulinum toxin, 25 units of drugs in each side, and LIS was done in surgery group by open method in left side. Pain, recovery and incontinency were compared between two groups during six months of follow up.Results: Based on this study, treatment of anal fissure does not affected by age and gender. Regarding to location of fissure, there was no difference between two different genders. Mean of age and ratio of gender were similar in both groups. The severity of pain in surgery group was lower than Dysport group six months after treatment (0.4±0.7 and 3.2±2.6 respectively, p<0.001). Recovery ratio in surgery group was higher than Dysport after six months (95% Vs.44.4% p<0.001). Gas or fecal incontinency did not reported after six months in both groups.Conclusion: Botulinum toxin is not efficacious in patients with chronic anal fissure, comparing with LIS. More future studies are necessary for final judgement.

Background: Gross difference in return to work exists in pilonidal sinus patients operated by primary and secondary repair. This survey was to evaluate the results of surgical management of pilonidal sinus with primary or secondary closure.Methods: In a randomized clinical trial, patients with pilonidal sinus referring to the surgical clinic of Shariati Hospital in Tehran, Iran between March 2007 and March 2009 were underwent either excision with midline closure (primary, n=40), or excision without closure (secondary, n=40). The recorded outcomes were hospital stay, healing time, time off work, postoperative pain, patient’s satisfaction and the recurrence rate.Results: Majority of the patients were male (87.50%). There was no significant difference in the hospital stay. Time off work (8.65±1.73 Vs.11.53±2.33 days, p=0.001) and healing time (3.43±0.92 Vs.5.3±0.79 days, p=0.001) were shorter in primary group; but, there were no significant differences in hospital stay and number of visits.Intensity of postoperative pain in the 1st (37.75±6.5 Vs.43.63±5.06, p=0.001), 2nd (26.75±6.66 Vs.34.63±5.48, p=0.001), 3rd (18.25±6.05 Vs.27.88±6.88, p=0.001), and 7th (8.45±3.85 Vs.17.88±6.19, p=0.001) days were lower in primary closure group. There was not significant difference in complication rates in groups. Patients’ satisfaction was higher in primary group (4.15±0.53 Vs.3.6±0.5, p=0.001).Conclusion: According to this study excision and primary closure is the preferred procedure in patients with pilonidal sinus. It has the advantages of shorter time off work; earlier wound healing, lesser postoperative pain, higher patients satisfaction and comparable complication and recurrence rates with excision and open wound.

Background: Respiratory virus infections represent a major public health problem because of their worldwide occurrence, ease of spread in the community and considerable morbidity and mortality. They are one of the most common reasons for hospitalization of children under the age of six. In some cases, infection with two different viruses increase the severity of disease which lead to the hospitalization.Case presentation: Among 202 samples related to children under the age of six with respiratory infections, two dual infections of Adenovirus with other respiratory viruses with PCR test were detected.Conclusion: Mixed respiratory viral infections are sometimes associated with severe disease and recognition of coinfection is important. Dual infections of Adenovirus with respiratory syncytial virus (RSV) and Swine origin influenza A (H1N1) virus were demonstrated. The evidence showed that the co-infection of Adenovirus with swine origin influenza A (H1N1), has increased the severity of disease which lead to the hospitalization.