- Adenoid cystic carcinoma with myoepithelial predominance affecting maxilla and maxillary sinus. [Journal Article]
- JSJ Stomatol Oral Maxillofac Surg 2018 Aug 17
- Adenoid cystic carcinoma (ACC) represents less than 10% of all salivary gland tumors, rarely occurring centrally in the jaws. Herein we describe the case of a 36-year-old female patient presenting a ...
Adenoid cystic carcinoma (ACC) represents less than 10% of all salivary gland tumors, rarely occurring centrally in the jaws. Herein we describe the case of a 36-year-old female patient presenting a painless swelling in the right maxilla, resulting in marked facial asymmetry. Intraorally it was observed a swelling covered by an erythematous and irregular-surfaced mucosa, affecting the gingiva and crossing the midline of the hard palate. Imaging studies showed a mixed radiolucent-radiopaque lesion with ill-defined borders, involving the right side of the maxilla and the maxillary sinus. Incisional biopsy revealed basophilic cribriform tumoral islands and solid sheets of neoplastic cells invading bone trabeculae. Most of the tumoral cells presented myoepithelial characteristics, while few true luminal/epithelial cells were observed. To illustrate the epithelial-myoepithelial pattern, immunohistochemical reactions were performed, as well as double immunohistochemical staining. The diagnosis was intraosseous ACC, which features were discussed as well as the potential differential diagnosis.
- Shape and size of non-spherical silver nanoparticles: implications for calculating nanoparticle number concentrations. [Journal Article]
- NNanoscale 2018 Aug 20
- The international drive to measure accurate number concentrations of nanoparticles is impeded by the typically heterogeneous populations of non-spherical nanoparticles. The irregular shape and size o...
The international drive to measure accurate number concentrations of nanoparticles is impeded by the typically heterogeneous populations of non-spherical nanoparticles. The irregular shape and size of "50 nm" silver nanoparticles is studied using Electron Tomography. It is evidenced that even for highly symmetrical particles the volume can be over 20% less than that of the circumscribed sphere; more irregularly shaped particles can have volumes of over 45% less. On this basis, criteria are provided to determine the particle sphericity from 2D projections obtained from Electron Microscopy, including an empirical method for particle volume estimation. The results allow the visualisation of irregularly shaped particles, revealing the presence of previously unseen voids in the nanoparticle structure. Comparison of tomographic data with other commonly used particle-sizing methods exposes the limitations of these methods in studying nanoparticle populations that exhibit heterogeneity.
- Effects of pentoxifylline on the histological and ultra-structural features of vitrified mouse ovarian tissue: An experimental study. [Journal Article]
- IJInt J Reprod Biomed (Yazd) 2018; 16(6):387-396
- CONCLUSIONS: Vitrification can damage the histological and ultra-structural features of the ovary in mouse models. PTX as an antioxidant, with concentration of 1.8 mM could not prevent and restore these damages and had no adequate effects on the vitrified ovarian tissues.
- Uterine Lipoleiomyoma and Lipoma: A Rare Unique Case Report with Review of Literature. [Journal Article]
- IJInt J Appl Basic Med Res 2018 Jul-Sep; 8(3):193-195
- Uterine lipoleiomyoma and pure lipoma are uncommon and extremely rare benign lipomatous tumors. Reported incidence is 0.03%-0.25%. Pure cervical lipoma is exceptionally rare. These tumors commonly ar...
Uterine lipoleiomyoma and pure lipoma are uncommon and extremely rare benign lipomatous tumors. Reported incidence is 0.03%-0.25%. Pure cervical lipoma is exceptionally rare. These tumors commonly arise in postmenopausal women. Ultrasonography and computed tomography finding may be nonspecific. Although magnetic resonance imaging can be useful in identifying the fatty nature of the lesion preoperatively, most of the cases postoperatively on histopathological examination. Although various theories of histogenesis of these tumors have been proposed, histogenesis remains to be enigma. These lesions may have coexistent malignancy in uterus, ovaries, and fallopian tubes or may have other metabolic disorders and abnormal estrogen status. Immunohistochemical studies have played an integral role in understanding its complex histogenesis. We did not find any case study in medical literature in which uterine lipoleiomyoma and cervical lipoma have been described in hysterectomy specimen. We report a unique case of a 43-year-old premenopausal woman with complaints of irregular vaginal bleeding and lower abdomen pain. Lipoleiomyoma in uterus corpus and cervical lipoma were diagnosed in hysterectomy specimen.
- Mass diffusion coefficient measurement for vitreous humor using FEM and MRI. [Journal Article]
- ICIOP Conf Ser Mater Sci Eng 2018; 297
- In early studies, the 'contour method' for determining the diffusion coefficient of the vitreous humor was developed. This technique relied on careful injection of an MRI contrast agent (surrogate dr...
In early studies, the 'contour method' for determining the diffusion coefficient of the vitreous humor was developed. This technique relied on careful injection of an MRI contrast agent (surrogate drug) into the vitreous humor of fresh bovine eyes, and tracking the contours of the contrast agent in time. In addition, an analytical solution was developed for the theoretical contours built on point source model for the injected surrogate drug. The match between theoretical and experimental contours as a least square fit, while floating the diffusion coefficient, led to the value of the diffusion coefficient. This method had its limitation that the initial injection of the surrogate had to be spherical or ellipsoidal because of the analytical result based on the point-source model. With a new finite element model for the analysis in this study, the technique is much less restrictive and handles irregular shapes of the initial bolus. The fresh bovine eyes were used for drug diffusion study in the vitreous and three contrast agents of different molecular masses: gadolinium-diethylenetriaminepentaacetic acid (Gd-DTPA, 938 Da), non-ionic gadoteridol (Prohance, 559 Da), and bovine albumin conjugated with gadolinium (Galbumin, 74 kDa) were used as drug surrogates to visualize the diffusion process by MRI. The 3D finite element model was developed to determine the diffusion coefficients of these surrogates with the images from MRI. This method can be used for other types of bioporous media provided the concentration profile can be visualized (by methods such as MRI or fluorescence).
- [Xanthogranulonatous pyelonephritis: report of 5 cases]. [Journal Article]
- BDBeijing Da Xue Xue Bao Yi Xue Ban 2018 Aug 18; 50(4):743-746
- Xanthogranulomatous pyelonephritis (XGP) is an unusual form of chronic pyelonephritis in which the renal parenchyma is destroyed and replaced by lipid-laden foamy macrophages. It usually affects midd...
Xanthogranulomatous pyelonephritis (XGP) is an unusual form of chronic pyelonephritis in which the renal parenchyma is destroyed and replaced by lipid-laden foamy macrophages. It usually affects middle-aged women with a history of recurrent urinary tract infection, diabetes, or kidney stones. The inflammatory process is usually diffuse and can extend beyond the kidney. The rare focal forms may simulate primary renal tumours. The preoperative imaging diagnosis may be difficult. We reported five cases of XGP, The findings of ours were recorded including kidney size, shape, contour, the echogenecity of the renal parenchyma, the internal echoes of the dilate collecting system, the presence of perinephric fluid accumulation and obstruction. One of the 5 cases was a male patient, and the other four were female, with a mean age of 53 years. He affected kidneys of the 5 cases swelled in different degrees, and one of them was found with line-like anechoic fluid. Among the 5 cases, one kidney appeared as diffusely reducing of the parenchyma echogenicity, multiple hypoechoic areas, disappearance of corticomedullary differentiation and multiple hyperecho with shadow. A round cystic anechoic lesion was found in one kidney, with internal punctate echo and peripheral fluid. Ultrasonographic finding of 1 case was extremely hypoechoic lesion on the left kidney, protruding from the outline of the kidney, with the partial renal capsule discontinuous, the less clear boundary, and a little blood flow in it. Ultrasonographic demonstration of 2 cases was mild dilatation of the collecting system with irregular wall thickening and internal hypoechogenicity, and 1 case was solid lesion with less clear boundary to the pelvic wall and a small amount of blood flow signal, the another 1 case was showed floccule without internal blood flow. Three cases were caused by chronic obstruction verified by operation, of which one was staghorn calculi, one was poorly differentiated squamous cell carcinoma in the middle part of the ureter, and one was inflammatory stricture of upper ureteral. Through analysis of the above five cases and review of related literature, we explored diagnoses and management of the patients with XGP. Xanthogranulomatous pyelonephritis (XGP) is a rare chronic variant of pyelonephritis characterized by destruction of the renal parenchyma. Combining ultrasonographic features of XGP with clinical recurrent urinary infection and chronic obstruction, XGP can be included in the differentiation. The diagnosis of XGP suspected by ultrasound can be clarified by CT, MRI, contrast-enhanced ultrasound.
- [A primary intestinal-derived adenocarcinoma in intestine bladder substitutes: a case report]. [Journal Article]
- BDBeijing Da Xue Xue Bao Yi Xue Ban 2018 Aug 18; 50(4):737-739
- Intestinal primary intestine-derived adenocarcinoma of the bladder substituted by the intestine is a very rare long-term complication after complete urethral reconstruction of the bladder. The probab...
Intestinal primary intestine-derived adenocarcinoma of the bladder substituted by the intestine is a very rare long-term complication after complete urethral reconstruction of the bladder. The probability of its occurrence is low. However, in recent years, it has been proved to be objective, but there is rare literature about its diagnosis and treatment methods. This article describes a case of cystectomy and Studer ileal conduit in Peking University Third Hospital due to bladder cancer. After 9 years, he was discovered with a primary intestinal-derived adenocarcinoma in the bladder substitutes by the intestine. A male patient, 64 years old, with persistent abdominal pain in the lower abdomen for two weeks. There was carrion-like material in the urine, no gross hematuria, no urinary frequency, urgency, dysuria, and no abnormalities in the examination. Urinary CT showed intestinal metaplasia in the bladder. There was 5.7 cm×2.4 cm×4.8 cm irregular tissue shadow, and ureteroscopy found, on the right side, the bladder tumor whose diameter was 4-5 cm. We performed open lumpectomy and repaired the bladder, and postoperative pathology showed middle-high differentiated adenocarcinoma. The patient recovered well after the surgery. This article reviewed the similar intestinal primary intestine-derived adenocarcinoma of the bladder substituted by the intestine and found that it had the highest incidence in the elderly male population. The pathogenetic factor was most closely related to the smoking. If the patients developed hematuria, carrion-like substances in the urine, and bladder irritation, the possibility of tumor development should be suspected. Then the patients should promptly take the tests, such as urine exfoliation cytology, urine FISH, urinary system B-ultrasound, cystoscopy, etc. The microscope was the most direct observation of the lesion site examination. If the pathological tumor occurred ,and then the tumor should be immediately removed, and a new urinary diversion was needed to avoid further progress of the tumor. And postoperative smoking was strictly prohibited, also the patients should strictly control their eating habits and regularly adhere to the follow-up at least 4 years or more, but the lifelong follow-up and review was a must. The mechanism of intestinal primary intestinederived adenocarcinoma of the bladder substituted by the intestine is still unclear. Studies suggest that it may be related to N-nitroso compounds, smoking, and postoperative inflammatory reactions.
- Challenges of customizing electrocardiography alarms in intensive care units: A mixed methods study. [Journal Article]
- HLHeart Lung 2018 Aug 16
- CONCLUSIONS: Alarm customization is nuanced and requires adequate support to develop safe and effective practices. The challenges identified can inform development of strategies to improve alarm customization.
- The Effects of Fillers and Binders on the Accuracy of Tablet Subdivision. [Journal Article]
- APAAPS PharmSciTech 2018 Aug 17
- The effects of excipients on the accuracy of tablet subdivision are severely underinvestigated. In this study, placebo tablets were prepared using a combined mixture design of fillers and binders to ...
The effects of excipients on the accuracy of tablet subdivision are severely underinvestigated. In this study, placebo tablets were prepared using a combined mixture design of fillers and binders to evaluate the effect of these excipients on subdivision accuracy. The responses assessed were mass loss, mass variation, tablet fragmentation, and increased friability. Dicalcium phosphate dihydrate (DCP) gave rise to more uniform and denser tablets than microcrystalline cellulose (MCC), thus resulting in greater subdivision accuracy. The binder type, hydroxypropylcellulose (HPC) or polyvinylpyrrolidone (PVP), did not affect the subdivision of DCP tablets. On the contrary, the structural similarity between HPC and MCC led to improved subdivision accuracy for MCC tablets. A less accurate subdivision was observed in tablets prepared with a DCP-MCC combination; this finding could be attributed to irregular binder distribution in this matrix. An optimized response was built using desirability analysis. This study helps to illuminate the relationship between fillers and binders to guide formulation scientists in the development of tablets with better subdivision performance.
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- Prevalence, intensity and factors associated with soil-transmitted helminths infections among preschool-age children in Hoima district, rural western Uganda. [Journal Article]
- BIBMC Infect Dis 2018 Aug 17; 18(1):408
- CONCLUSIONS: The prevalence of Soil transmitted helminths infection among preschool-age children in Hoima district significantly increased with age. Poor hygiene, inadequate sanitation and irregular deworming were associated with STH infections among PSAC in the study area. Intense health education on the importance of hygienic practices, improved sanitation and regular deworming of PSAC should be integrated into prevention and control programs.