Thin Layer Of Tissue Research Articles

In vivo articular cartilage regeneration through infrapatellar adipose tissue derived stem cell in nanofiber polycaprolactone scaffold

In this study, we report the development of a nanofiber polycaprolactone scaffold that can act as a stem cell carrier to induce chondrogenesis and promote cartilage repair in vivo.Infrapatellar fat pads were obtained from sheep knee and the stem cells were isolated and characterized by flow cytometry. Defects were created in sheep knee, two defects received adipose tissue derived stem cells (ASCs)-polycaprolactone construct, second group received polycaprolactone (PCL), the third group was chosen as the ASCs group and the fourth group was control group. Morphological evaluation showed that defects treated with ASCs-scaffold constructs were completely filled with cartilage-like tissue, while other groups revealed the formation of a thin layer of cartilage-like tissue in the defects. Real-Time RT-PCR showed the increase in collagen type 2 mRNA levels, aggrecan and Sox9 in ASCs/PCL groups in comparison with the other groups.Immunofluorescence and toluidine blue staining results showed the protein expression of collagen type 2 and formation of round and polygonal clusters of chondrocytes in ASCS/PCL group.According to our results nanofiber polycaprolactone promoted the chondrogenesis of infrapatellar adipose tissue derived stem cells in vivo and could offer significant promise in the biological functionality of stem cell tissue engineering in clinical practice.

Fundus Autofluorescence in Lamellar Macular Holes and Pseudoholes: A Review.

Macular pseudoholes (MPHs) and lamellar macular holes (LMHs) have been recently defined according to spectral domain optical coherence tomography (SD-OCT) criteria. A major feature for differentiating an MPH from an LMH remains the loss of foveal tissue. The anatomy of the foveola is peculiar with the macular pigment (MP) embedded in a very thin layer of tissue underlying the internal limiting membrane and mainly constituted of a specialized group of Müller cells and Henle's fibers. Despite the near microscopic resolution (≈5–7 μm) and the capability to visualize the outer retina in detail, SD-OCT may fail to ascertain whether a very small loss of this foveolar tissue has occurred. Blue-fundus autofluorescence (B-FAF) imaging is useful in this respect because even very small loss of MP can be identified, suggesting a corresponding localized loss of the innermost layers of the foveola. A definition of MP loss would help differentiating an LMH from an MPH where B-FAF imaging will be negative.

Expression of collagens type I and V in healing rat's tympanic membrane

ObjectivesOur preliminary study performed on perforated rat's tympanic membrane (TM) using Rat Wound Healing RT2 Profiler PCR Array showed significantly increased levels of mRNA for collagens type I and V. Enhanced expression of those genes does not assure that their protein products are indeed present, and in what quantity. Therefore, this study was undertaken to analyze the collagen type I and V content in the healing TM. MethodsSixty rats were used, of which 10 served as controls and the others had their TM perforated. The experimental animals were divided into five subgroups on the basis of time points (03, 06, 09, 14, 20 day after injury). Videootoscopy and histology were employed to assess the morphology of the healing process. The expression of collagen type I and V was evaluated using Western blot analysis. Tissue localization of collagens was determined by the immunofluorescence method. ResultsThe collagen type I expression was three times higher on the third day after injury and remained on that level for whole period of observation, up to day 20. The increase of the collagen type V expression was gradual, reaching the highest level on day 14 following injury. In comparison to the control TM statistically significant increase in the level of expression was observed starting from day 09 to the end of observation period. In healing TM immunofluorescent labeling of collagen type I and V was seen on the surface of remnants of previous lamina propria and in the loose proliferating fibrous tissue. On day 20 immunofluorescence was present mainly on the surface of thin connective tissue layers forming the scar in the place of previous perforation. ConclusionAlthough the collagens type I and V are present only in subepithelial layer in the normal rat's TM they play significant role in TM healing process.

A Study of Congenital abnormalities of the Non-Pregnant genitalia in cows: 1. Ovaries and uterine tubes

The current study was conducted to detect the pathological conditions of the congenital abnormalities of ovaries and uterine tubes of cows slaughtered at the abattoir in Sulaimani, Kurdistan Region-Iraq. The pathological conditions were subjected to a macroscopic and microscopic examination of 404 samples of female genitalia collected from slaughtered non-pregnant cows, during the period from February to September 2014 from the Qaragol slaughterhouse twice a week. The organs were observed macroscopically for pathological abnormalities and stained tissues with Haematoxylin and eosin. They were examined under microscope for determination of the type of lesion present in the organ. Among the 404 genitalia samples collected from the non-pregnant animals, 206 (51%) were found without gross pathological abnormalities and (with cyclic activity) and the 30 (7.43%) samples were found with gross congenital abnormalities of ovaries and uterine tubes. Detected lesions in the ovaries and uterine tubes included paraovarian cysts 3.21%, ovarian hypoplasia 1.98%, ovarian agenesis 0.50%, aplasia of uterine tube 0.99%, segmental aplasia of uterine tube 0.50% and accessory of uterine tube 0.25%. The histopathological sections of paraovarian cyst showed a single layer of tubal-type ciliated cuboidal epithelial cells resting on a thin layer of fibrous tissue, the section of ovarian hypoplasia showed lack of ovarian follicles and oocytes, which instead are replaced by bands fibrovascular stroma. The partial duplication of uterine tube was observed, which was about 6 cm from the uterotubal junction and extended distally for a distance of 4 cm that was found in right side of tracts. It was concluded that the paraovarian cysts were the most common congenital abnormalities of ovaries and uterine tubes in non-pregnant cows.

Modified method of laser triangulation

The measurement of the thickness of thin layers of biological tissue that are transparent to radiation in the visible range in the interval [0.01; 1] mm, in particular the corneal layer of the eye, is an actual and completely unsolved problem. The main difficulty lies in controlling the thickness of the residual corneal layers during ophthalmic operations for refractive correction of vision on the anterior tissues of the eye. The method of thickness measurement due to the specific task (in vivo — on the cornea) must satisfy a number of criteria: to be carried out in contact with the tissues under investigation (optical methods), in real time (a certain ratio of the processing speed to the volume of information obtained ), safety of use should be considered (minimal risk of complications after use). In this paper, we consider various modifications and applications of the method of laser triangulation to the measurement of the thickness of thin transparent layers. We give an estimate of the limit of the smallest layer thickness, which can be measured by the proposed method and the results of experiments (0.23 mm). In addition, we propose an algorithm for computer processing of obtained images, which allows increasing the range of this method (up to 0.10 mm). We estimate the most optimal angles of viewing of laser radiation (0.88 rad), the position of the photodetector (0.17 rad) and the maximum permissible power density of the laser radiation used (10 mW/mm2).

Structures of filum terminale and characteristics of ependymal cells of its central canal in rats

The filum terminale (FT) is a potential source of ependymal cells for transplantation. The present study was performed to clarify the characteristics of ependymal cells of the central canal (CC) of the FT in rats. The FT was a thin strand continuous with the conus medullaris (CM), a caudal end of the main spinal cord, situated at the L3-4 level in adult rats. The border between the CM and FT was not visible, but could be defined as the site where the strand was as thin as its more caudal segment. While the CM contained an appreciable amount of white and grey matter associated with the CC at its center, the FT had no or only a negligible amount of such spinal cord parenchymal tissue. The FT was tracked ca. 4 cm from the site defined above to the level of S4-5 in adult rats. The rostral part of the FT (FTI) included within the cauda equina is exposed to cerebrospinal fluid, whereas the more caudal part (FTE) was surrounded by a dense layer of connective tissue. Almost all ependymal cells were immunostained for Sox2, Sox9, FoxJ1, and CD133, generally recognized immunochemical markers for ependymal cells of the CC in the spinal cord. Ependymal cells of the CC of FT exhibited almost the same structural and immunohistochemical characteristics as those of the CC of the main spinal cord. Ependymal cells of FTI covered by a thin layer of connective tissue are considered appropriate for transplantation.

A 3-dimensional bioprinted tracheal segment implant pilot study: Rabbit tracheal resection with graft implantation

ObjectivesSurgical reconstruction of tracheal disease has expanded to include bioengineering and three dimensional (3D) printing. This pilot study investigates the viability of introducing a living functional tracheal replacement graft in a rabbit animal model. MethodsSeven New Zealand White rabbits were enrolled and six completed participation (one intraoperative mortality). Tracheal replacement grafts were created by impregnating 3D printed biodegradable polycaprolactone (PCL) tracheal scaffolds with rabbit tracheal hyaline chondrocytes. 2 cm of native trachea was resected and the tracheal replacement graft implanted. Subjects were divided into two equal groups (n = 3) that differed in their time of harvest following implantation (three or six weeks). Tracheal specimens were analyzed with intraluminal telescopic visualization and histopathology. ResultsThe two groups did not significantly differ in histopathology or intraluminal diameter. All sections wherein the implant telescoped over native trachea (anastomotic ends) contained adequate hyaline cartilage formation (i.e. chondrocytes within lacuna, surrounding extracellular matrix, and strong Safranin O staining). Furthermore, the PCL scaffold was surrounded by a thin layer of fibrous tissue. All areas without membranous coverage contained inadequate or immature cartilage formation with inflammation. The average intraluminal stenosis was 83.4% (range 34.2–95%). ConclusionsWe report normal cartilage growth in a tracheal replacement graft when chondrocytes are separated from the tracheal lumen by an intervening membrane. When no such membrane exists there is a propensity for inflammation and stenosis. These findings are important for future construction and implantation of tracheal replacement grafts. Level of evidenceNot applicable: this is an in vivo animal trial.

A novel patient-specific three-dimensional drug delivery construct for regenerative endodontics.

Evoked bleeding (EB) clinical procedure, comprising a disinfection step followed by periapical tissue laceration to induce the ingrowth of undifferentiated stem cells from the periodontal ligament and alveolar bone, is currently the only regenerative-based therapeutic approach to treating pulp tissue necrosis in undeveloped (immature) permanent teeth approved in the United States. Yet, the disinfection step using antibiotic-based pastes leads to cytotoxic, warranting a biocompatible strategy to promote root canal disinfection with no or minimal side-effects to maximize the regenerative outcomes. The purpose of this investigation was to develop a tubular three-dimensional (3D) triple antibiotic-eluting construct for intracanal drug delivery. Morphological (scanning electron microscopy), chemical (Fourier transform infrared spectroscopy), and mechanical (tensile testing) characteristics of the polydioxanone-based triple antibiotic-eluting fibers were assessed. The antimicrobial properties of the tubular 3D constructs were determined in vitro and in vivo using an infected (Actinomyces naeslundii) dentin tooth slice model and a canine method of periapical disease, respectively. The in vitro data indicated significant antimicrobial activity and the ability to eliminate bacterial biofilm inside dentinal tubules. In vivo histological findings demonstrated that, using the EB procedure, the tubular 3D triple antibiotic-eluting construct allowed the formation of an appropriate environment that led to apex closure and the ingrowth of a thin layer of osteodentin-like tissue into the root canal. Taken together, these findings indicate that our novel drug delivery construct is a promising biocompatible disinfection strategy for immature permanent teeth with necrotic pulps. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 1576-1586, 2019.

Fetal pericallosal lipomas - Clues to diagnosis in the second trimester.

Pericallosal lipomas (PCL) are congenital soft masses of adipose cells encapsulated by a thin layer of fibrous tissue, appearing adjacent to the corpus callosum (CC). The lipomas are usually diagnosed prenatally during the third trimester. The purpose of this study was to identify 2nd trimester ultrasound findings that may hint to a later diagnosis of PCL and to evaluate their MRI evolution. A multicenter study of fetuses diagnosed during the 3rd trimester with a PCL in 7 fetal ultrasound units between 2001 and 2017. We reevaluated the ultrasound and MRI images starting from the referral examination and until the time of diagnosis, searching for clues that could have prompted an earlier diagnosis. Parents were contacted at the end ofthe study period to obtain information regarding development and neurological examination. Fifteen patients with PCL were diagnosed during the study period; fourteen had second trimester scans. A 2nd trimester diagnosis was established in only 2 (13.3%). Anomalies of the CC were evident in 8/14 patients during the 2nd trimester scan and included: short length (n=4), increased thickness (n=1), complete agenesis (n=2) and partial agenesis (n=1). Third trimester ultrasound scans were considered diagnostic of PCL in all 12 remaining cases, in eight it was considered an isolated finding. Postnatal neurological evaluation in the isolated cases revealed normal development in all children. One child was diagnosed with attention deficit disorder. Non visualization of a PCL during the 2nd trimester is common, and should not be considered a diagnostic error. An underlying PCL should be included in the differential diagnosis of CC anomalies during this time period, necessitating further follow up into the 3rd trimester.

Abstract 3210: Photothermal therapy of malignant mesothelioma with delaminated MXene Ti3C2

Abstract Malignant mesothelioma is an aggressive and deadly form of cancer that develops in the thin layer of tissue surrounding the majority of internal organs (mesothelium). Malignant mesothelioma has no known cure and has a very poor prognosis because of late diagnosis and limited usefulness of standard treatments. We are exploring newer treatments to tackle this deadly disease. Photothermal therapy is an emerging noninvasive spatiotemporal selective therapeutic strategy that employs near-infrared photoabsorbers to generate heat for thermal ablation of cancer cells. The therapeutic efficacy of photothermal therapy significantly depends on the transformation of light to sufficient heat with photothermal agents. MXene Ti3C2 is an effective two-dimensional light-to-heat conversion material. The internal light-to-heat conversion efficiency of MXene Ti3C2 was measured to be 100%, indicating a perfect energy conversion. In this study we report for the first time using the MXene Ti3C2 nanoplatform as a photothermal agent to efficiently ablate malignant mesothelioma. First, we prepared two-dimensional MXene Ti3C2 and UV-vis-NIR spectrum showed Ti3C2 has a strong absorbance at the region of 790 nm, which showed a high light extinction coefficient of 26.081 L g-1cm-1 and exhibited a good photothermal conversion efficiency of 22%. Photothermal heating curves show temperatures of different concentration of MXene Ti3C2 increase steadily with irradiation of 808nm laser. Recycling heating profiles demonstrate that MXene Ti3C2 can be repeatedly heated stably. Next, the effects of MXene Ti3C2 on normal and mesothelioma cell lines were tested with CellTiter-Glo® luminescent cell viability assays. MXene Ti3C2 has no toxicity to cells at the tested concentration range. Light microscopy revealed that MXene Ti3C2 can accumulate inside of mesothelioma cells but not in normal cells. There was no red blood cell hemolysis within the tested concentration range and the hemolysis ratio was 0.5% even at ten times higher than the test concentration. Then, normal and mesothelioma cells were treated with and without MXene Ti3C2 for 24~48 hours followed by laser irradiation. CellTiter-Glo® luminescent cell viability assays and colony formation assays validated that MXene Ti3C2-treated mesothelioma cells were eliminated by laser irradiation while normal cells and nontreated mesothelioma were spared. Flow cytometry and Western blot analysis were used for determination of apoptosis. Lastly, we established a mesothelioma mouse xenograft model to evaluate the therapeutic effect of MXene Ti3C2 on mesothelioma in vivo. We are also pursuing the combination of MXene Ti3C2-based photothermal therapy and current therapies for mesothelioma. Our results indicate that MXene Ti3C2 is a promising photothermal agent in therapy of mesothelioma. Citation Format: Lanlan Zhou, Fayan Meng, Babak Anasori, Yury Gogotsi, Wafik S. El-Deiry. Photothermal therapy of malignant mesothelioma with delaminated MXene Ti3C2 [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 3210.

The intensity of the inflammatory response in experimental porcine bruises depends on time, anatomical location and sampling site

The assessment of the age of bruises inflicted on livestock is an important component of veterinary forensic pathology investigations. However, the sampling site within a bruise, the anatomical location and the mass and speed of the object inflicting the blunt trauma might influence the intensity of the inflammatory reaction. In the present study, the variation of the inflammatory reaction within and along experimental porcine bruises was evaluated in order to determine the optimal sampling site. Moreover, we evaluated if a combination of histological characteristics and gene expression signatures was able to differentiate bruises according to anatomical location, age of bruises and the speed and mass of the object used to cause the impact.Twelve experimental slaughter pigs were anesthetized, and on each animal four blunt traumas were inflicted on the back using either a plastic tube or an iron bar, respectively. The pigs were euthanized at 2, 5 or 8 h after infliction. Following gross examination, skin and underlying muscle tissue were sampled from the center and both ends of bruises and evaluated histologically. Subcutaneous fat tissue from the center of the bruises was sampled for quantitative real-time polymerase chain reaction to evaluate mRNA expression of 13 selected genes. Uninjured tissue was sampled from the right thigh of all pigs and served as control tissue.The amount of tissue damage and the intensity of the inflammatory reaction in bruises depended on the sampling site within and along a bruise, the anatomical location and the age of the bruise. The optimal site for sampling, i.e. the most pronounced inflammatory reaction, was at the center of the bruises where the plastic tube or iron bar first struck the skin. Moreover, bruises inflicted in areas with a thin layer of subcutaneous fat tissue showed more damage and inflammation in the underlying muscle tissue compared to bruises inflicted in areas with a thicker layer of subcutaneous fat tissue. In addition, hemorrhage in the muscle tissue was more likely present when bruises were inflicted with an iron bar compared to a plastic tube. Combining histology and mRNA expression of the 13 genes showed that the age of bruises could be determined with a precision of ±2.04 h. Moreover, the age of bruises could be determined with a precision of ±1.84 h based solely on mRNA expression of a selection of four genes.

Maxillary Reconstruction Using a Gullwing Fibula Osteofascial Flap and Flexor Hallucis Longus Muscle.

Summary:The appropriate reconstruction of an infrastructure maxillectomy defect requires vascularized bone for maxillary arch restoration, soft tissue bulk for filling the residual defect extending up to the orbital floor, and a thin tissue layer for resurfacing the palate and adjacent cheek mucosa. Although several free tissue flaps have been previously described as reconstructive options, each possesses limitations. We describe the fibula osteofascial flap with flexor hallucis longus muscle, no skin paddle, and a “gullwing” fascial component, as an ideal reconstructive option for these specific maxillary defects. It satisfies the necessary requirements of bone, restoration of intraoral surfaces, as well as additional soft tissue volume to provide the optimal aesthetic and functional result. It also has the added benefit of minimizing morbidity to, and improving aesthetics of, the donor site. This is demonstrated through a case presentation and review of the existing literature.

Tissue oximetry by diffusive reflective visible light spectroscopy: Comparison of algorithms and their robustness

It is essential to measure tissue oxygen saturation (StO2 ) locally and in thin layers of tissue, for example, the bronchial mucosa, skin flaps and small bones. Visible light spectroscopy (VLS) with a shallow penetration depth is suitable method. Although several VLS algorithms have been developed and described, they have not yet been compared to each other. This hinders attempts to compare the clinical results obtained by different algorithms. To address this issue, we compared the algorithms of Harrison, Knoefel, Pittman-Duling, Sato and our OxyVLS oximeter, which applies the algorithm from Wodick and Lübbers, in a liquid phantom with optical properties of human tissue. We generally observed considerable differences between the algorithms, which were StO2 dependent. Exceptions were OxyVLS and Sato, showing a high level of agreement with negligible StO2 dependency. In spite of the considerable deviation between the other algorithms, the difference of StO2 between them in clinically normal StO2 was <10%. We did not observe any dependency of the algorithms on hemoglobin content of the phantom or temperature.

Sinus-like dilatations of the mammary milk ducts, Ki67 expression, and CD3-positive T lymphocyte infiltration, in the mammary gland of wild European rabbits during pregnancy and lactation.

Sinus‐like dilatations of the mammary duct are recognisable in the mammary gland of pregnant and lactating wild European rabbits. These dilatations exhibit a bilaminar epithelial lining, with luminal epithelial cells expressing basal and lateral E‐cadherin. Occasional binucleated mammary epithelial cells are present in the luminal layer. Underlying the luminal epithelial cells is a basal layer of cytokeratin 14‐positive cells, supported by a thin layer of fibrous tissue. Multi‐segmental epithelial proliferation, as indicated by Ki67 expression, is apparent in the luminal epithelial cells, suggesting a capacity for division during pregnancy and lactation. CD3‐positive T lymphocytes are present both intraepithelially, suggesting exocytosis, and in foci subjacent to the ductular epithelium. We consider that sinus‐like dilatations of the mammary duct may have the potential to give rise to a subset of the mammary gland neoplasms classified as ductal in origin. Milk accumulation in these sinus‐like dilatations is likely to provide a niche for bacterial replication in cases of mastitis in rabbits. These structures are an important component of the innate immune system of the mammary gland, both as a physical barrier and as an interface between the milk and mammary immune cells.

In vivo quantification of hydrogen gas concentration in bone marrow surrounding magnesium fracture fixation hardware using an electrochemical hydrogen gas sensor

Magnesium (Mg) medical devices are currently being marketed for orthopedic applications and have a complex degradation process which includes the evolution of hydrogen gas (H2). The effect of H2 exposure on relevant cell types has not been studied; and the concentration surrounding degrading Mg devices has not been quantified to enable such mechanistic studies. A simple and effective method to measure the concentration of H2 in varying microenvironments surrounding Mg implants is the first step to understanding the biological impact of H2 on these cells. Here, the in vivo measurement of H2 surrounding fracture fixation devices implanted in vivo is demonstrated. An electrochemical H2 microsensor detected increased levels of H2 at three anatomical sites with a response time of about 30 s. The sensor showed the H2 concentration in the bone marrow at 1 week post-implantation (1460 ± 320 µM) to be much higher than measured in the subcutaneous tissue (550 ± 210 µM) and at the skin surface (120 ± 50 µM). Additionally, the H2 concentrations measured in the bone marrow exceeded the concentration in a H2 saturated water solution (∼800 µM). These results suggest that H2 emanating from Mg implants in bone during degradation pass through the bone marrow and become at least partially trapped because of slow permeation through the bone. This study is the first to identify H2 concentrations in the bone marrow environment and will enable in vitro experiments to be executed at clinically relevant H2 concentrations to explore possible biological effects of H2 exposure. Statement of SignificanceAn electrochemical H2 sensor was used to monitor the degradation of a Mg fracture fixation system in a lapine ulna fracture model. Interestingly, the H2 concentration in the bone marrow is 82% higher than H2 saturated water solution. This suggests H2 generated in situ is trapped in the bone marrow and bone is less permeable than the surrounding tissues. The detectable H2 at the rabbit skin also demonstrates a H2 sensor’s ability to monitor the degradation process under thin layers of tissue. H2 sensing shows promise as a tool for monitoring the degradation of Mg alloy in vivo and creating in vitro test beds to more mechanistically evaluate the effects of varying H2 concentrations on cell types relevant to osteogenesis.

Survey on diagnosis of diseases from retinal images

Retina is a thin membranous layer of tissue that occupies at the back of the eye which provides central vision needed for daily routines. Identifying retinal diseases at the early stage is a challenging task since healthy retina is required for central vision. Several retinal diseases affect the eye such as retinal tear, retinal detachment, glaucoma, macular hole and macular degeneration etc. These maladies will encounter a secondary growth in the close future as the age of the person increases. A survey is made which tells about the diagnosis of the retinal diseases from the retinal images using machine learning techniques.

Photoswitchable Micelles for the Control of Singlet-Oxygen Generation in Photodynamic Therapies.

Inadvertent photosensitizer-activation and singlet-oxygen generation hampers clinical application of photodynamic therapies of superficial tumors or subcutaneous infections. Therefore, a reversible photoswitchable system was designed in micellar nanocarriers using ZnTPP as a photosensitizer and BDTE as a photoswitch. Singlet-oxygen generation upon irradiation didnot occur in closed-switch micelles with ZnTPP/BDTE feeding ratios >1:10. Deliberate switch closure/opening within 65-80 min was possible through thin layers of porcine tissue in vitro, increasing for thicker layers. Inadvertent opening of the switch by simulated daylight, took several tens of hours. Creating deliberate cell damage and prevention of inadvertent damage in vitro and in mice could be done at lower ZnTPP/BDTE feeding ratios (1:5) in open-switch micelles and at higher irradiation intensities than inferred from chemical clues to generate singlet-oxygen. The reduction of inadvertent photosensitizer activation in micellar nanocarriers, while maintaining the ability to kill tumor cells and infectious bacteria established here, brings photodynamic therapies closer to clinical application.

Impact of extra-articular pathologies on groin pain: An arthroscopic evaluation

PurposeFor patients who have anterior hip pain evaluated by Patrick’s test and tenderness at Scarpa’s triangle, we perform periarticular debridement based on the hypothesis that extra-articular pathologies are responsible for the hip pain. The purpose of this study was to categorize the endoscopic extra-articular findings and to evaluate the clinical significance of periarticular pathologies in anterior hip pain.MethodsArthroscopic findings of 77 patients who underwent periarthritic debridement were evaluated. As extra-articular pathologies, injuries of the direct head and reflective head of the rectus femoris muscle were evaluated. A thin layer of fat tissue normally exists on the anterior inferior iliac spine (AIIS), the attachment site of the direct head of the rectus femoris muscle. The macroscopic appearance of the fat pad on the AIIS was categorized as normal, blood vessel-rich adipose tissue or adipose tissue with fibrosis or scar formation and histologically confirmed. Adhesion of gluteal muscles to the joint capsule was also evaluated.ResultsOf the 77 patients, 75 had rupture of the direct head of the rectus femoris. In contrast, rupture of the reflective head was extremely rare. Seven patients had a normal fat pad on the AIIS, 11 had blood vessel-rich adipose tissue and 55 had adipose tissue with fibrosis. Fat tissue was completely replaced by fibrous scar tissue in another 4 patients. In 64 patients, adhesion between the anterior joint capsule and gluteus muscles was marked. Groin pain disappeared soon after the operation even when labral tears were not repaired and all patients returned to daily life and sports activities within 2 weeks after operation.ConclusionRectus femoris tendinosis, fibrosis of the AIIS fat pad, and adhesion of gluteal and rectus femoris muscles are common extra-articular pathologies in patients with anterior hip pain. Management of only these lesions induces rapid relief of anterior hip pain even in the absence of labral tear repair. My observations suggest that it is desirable to be aware of the presence of periarticular pathologies as a cause of groin pain.

Some Histological and Scanning Electron Microscopic Studies on The Gizzard of Turkey

This research was designed to study the histological characteristics of gizzard in turkey by light and scanning electron microscopes. The study was performed on ten healthy mature birds of turkey. The specimens were immediately removed after slaughter, gently cleaned and fixed in 10% buffered neutral formalin then processed for light and scanning microscopic studies. The histological observations revealed that as other species of birds the turkey gizzard was consisted of four tunics; mucosa, sumbucosa, musculosa and serosa. Thick layer of cuticle was lined the gizzard mucosa which contains gastric pits. The lamina epithelialis lined with simple cuboidal epithelium, the lamina propria contained simple tubular glands which arranged in groups. These glands are lined by simple cuboidal epithelium. The inner part of these tubular glands contains an eosinophilic secretion. PAS positive material distribute nearly in almost region. It was within the lumen of the glands, within the cells lining the surface and crypts, Also, within the deep glandular cells. The submucosa consists of connective tissue formed mainly from collagen fibers. The tunica muscularis was very thick formed from parallel bundles of smooth muscle fibers, these bundles separated by thin layer of connective tissue. Scanning electron microscopic observations revealed that the surface of the koilin cuticle was very thick and appeared in form of clusters separated by grooves resembling the cracked ground appearance. These clusters were in the form of rodlets.

Urachal adenocarcinoma - case report and literature review

Introduction. Urachal adenocarcinoma is extremely rare and comprises from 0.35% to 0.7% of all bladder tumors. The most common histologic subtype of urachal tumors is adenocarcinoma which can be associated with intestinal metaplasia and mucin production. Case report. We report a case of a 53-year-old patient who attented a urologist because of an intermittent haematuria lasting for three months. The ultrasound examination detected infiltration of the bladder at the fundus, 24 ? 29 mm in diameter. By the same wall, next to the tumor, there was an oval hypoechoic lesion about 40 mm in diameter. Computed tomography scan showed a solid, echogenic, strictly limited tumor at the fundus of the bladder, anteriorly, 32 ? 35 ? 22 mm in diameter which was positive after contrast application. The patient underwent partial cystectomy with complete excision of the tumor lesion 1.5 cm in healthy tissue. Histopathological analysis showed diagnosis of Adenocarcinoma mucinosum vesicae urinariae infiltrans. Patohistological findings detected a part of the urachal wall with a thin layer of fibromuscular tissue, chronic inflammation, microcalcifications in the lumen, flattened and desquamated epithelium. One year after the surgery, there were no signs of primary disease or metastases in other organs. Conclusion. Urachal adenocarcinoma is extremely rare. Long term survival could be achieved by surgical treatment in the early stage of the disease which consists of complete resection of urachal carcinoma and partial or total cystectomy.