Single coronary artery and coronary artery-pulmonary artery fistula in a variation of the Shone complex.

We aim to share the diagnostic methods and relevant findings of a rare case involving a 1-year-old girl with a variation of Shone syndrome, presenting with the coexistence of a single coronary artery and a fistula between the coronary artery and the right pulmonary artery. The patient had previously undergone aortic arch reconstruction surgery and during the preoperative evaluation, cardiac computed tomography angiography (CCTA) revealed the additional presence of a single coronary artery originating from the right, which fistulized into the right pulmonary artery distally. This finding was further confirmed by conventional angiography. This case report highlights the importance of CCTA in identifying and directing the treatment of additional anomalies that may accompany rare congenital abnormalities.

A rare ventriculoarterial connection: double outlet of both ventricles.

Ventriculoarterial connection is one of the important points of the segmental approach to congenital cardiac malformations. Double outlet of both ventricles is a rare form where both great arterial roots override the interventricular septum. In this article, we aimed to draw attention to this very rare form of ventriculoarterial connection by presenting an infant case diagnosed using echocardiography, CT angiography, and 3-dimensional modelling.

A unique bizarre subtype of mixed total anomalous pulmonary venous connection.

Mixed total anomalous pulmonary venous connection is a rare CHD with a wide variation in pulmonary venous anatomy and drainage. We present a ten-day-old newborn with a rare bizarre subtype of mixed total anomalous pulmonary venous connection.

Postsurgical Size-Changing Temporal Lobe Arachnoid Cysts in Patients with Trigonocephaly Who Underwent Reconstructive Surgery: A Two-Case Report.

INTRODUCTION: Trigonocephaly (TC), the tapering of the metopic suture toward the anterior, lateral inadequacy of supraorbital bar, hypoplasia of the ethmoid bone, and hypotelorism due to orbital medialization leads to a triangular shape in the head together with frontotemporal stenosis and widening of the biparietal diameter. Arachnoid cysts (ACs) are benign cysts, which are formed by cerebrospinal-fluid entrapment into the arachnoid membrane due to duplication or separation of the arachnoid membrane layers. ACs are typically located in the middle cranial fossa and Sylvian fissure region. They are mostly detected incidentally through neuroimaging. The coexistence of TC and AC is considerably rare; hence, its actual incidence is unknown. To our knowledge, the coexistence of nonsyndromic TC and AC has been revealed in only 2 publications in the literature. In this case study, 2 patients, one of whom were with unilateral and the other with bilateral temporally localized ACs, sizes of which increased following the reconstructive surgeries, and who underwent reconstructive surgery for TC, were presented. CASE REPORT: Both of the 2 patients that we have presented in our study are 7 months old and male. Fronto-orbital advancement and calvarial remodeling operations were performed on both. ACs of the patients were not intervened. However, in the post-op follow-ups, the left temporal cyst of the 1st case and the right cyst of the 2nd case grew radiologically, and the left cyst became very small. DISCUSSION/CONCLUSION: TC must be treated surgically. ACs may show changes in size secondary to the increase in intracranial volume following reconstructive surgery for TC. However, if it does not give rise to any complaints, it can be followed-up clinically and radiologically. Patients should be followed-up for many years, given that neurodevelopmental and behavioral problems may occur later in both pathologies.

Involvement of dying beta cell originated messenger molecules in differentiation of pancreatic mesenchymal stem cells under glucotoxic and glucolipotoxic conditions.

Beta cell mass regulation represents a critical issue for understanding and treatment of diabetes. The most important process in the development of diabetes is beta cell death, generally induced by glucotoxicity or glucolipotoxicity, and the regeneration mechanism of new beta cells that will replace dead beta cells is still not fully understood. The aim of this study was to investigate the generation mechanism of new beta cells by considering the compensation phase of type 2 diabetes mellitus. In this study, pancreatic islet derived mesenchymal stem cells (PI-MSCs) were isolated from adult rats and characterized. Then, beta cells isolated from rats were co-cultured with PI-MSCs and they were exposed to glucotoxicity, lipotoxicity and glucolipotoxicity conditions for 72 hr. As the results apoptotic and necrotic cell death were increased in both PI-MSCs and beta cells especially by the exposure of glucotoxic and glucolipotoxic conditions to the co-culture systems. Glucotoxicity induced-differentiated beta cells were functional due to their capability of insulin secretion in response to rising glucose concentrations. Moreover, beta cell proliferation was induced in the glucotoxicity-treated co-culture system whereas suppressed in lipotoxicity or glucolipotoxicity-treated co-culture systems. In addition, 11 novel proteins, that may release from dead beta cells and have the ability to stimulate PI-MSCs in the direction of differentiation, were determined in media of glucotoxicity or glucolipotoxicity-treated co-culture systems. In conclusion, these molecules were considered as important for understanding cellular mechanism of beta cell differentiation and diabetes. Thus, they may be potential targets for diagnosis and cellular or therapeutic treatment of diabetes.

The effect of plant lectins on the survival and malignant behaviors of thyroid cancer cells.

Altered or aberrant glycosylation is a common phenomenon in cancer cells and it originates from changes in the expression of the enzymes, glycosyltransferase, and glycosidase which up-regulate in response to some oncogenes in the glycan synthesis pathway. In this present study, it has been aimed to determine the alteration of sialic acid and fucose expressions in the cell surface of human thyroid carcinoma cells and investigate the changes in tumorigenic and malignant characters after treating them with specific plant lectins. Our study showed that the cell surface glycan chains of anaplastic 8305C, follicular FTC-133, and papillary K1 thyroid carcinoma cells were rich in α-2,6, α-2,3, sialic acid, and α-1,6 fucose residues. When the cells were treated with specific doses of Maackia amurensis lectin II (MAL), Sambucus nigra agglutinin (SNA), and Aleuria aurantia lectin (AAL) which have specific binding capacity for the detected glycan residues, respectively their cancerous traits changed dramatically. Remarkable findings obtained from MAL treatment leading to necrosis in 8505C cells without any toxicity for normal thyroid epithelial cells but it had proliferative effect on K1 and FCT-133 cells. Besides, MAL and SNA treatment decreased the mobility of 8505C and K1 cells. MAL and SNA lectins dramatically reduced the endothelial affinity of the cells and AAL significantly attenuated that of 8050C and K1 cells but not FTC-133. These results suggest that altered cell surface glycosylation in thyroid cancer seems to be a strong candidate for developing new therapeutic strategies.

Runt-Related Transcription Factor 2 (Runx2) Is Responsible for Galectin-3 Overexpression in Human Thyroid Carcinoma.

Runx2 promotes metastatic ability of cancer cells by directly activating some of the mediators regarding malignancy. Galectin-3 (Gal-3) extensively expressed in normal and transformed cells and it is responsible for many cellular processes. In this study, we aimed to investigate whether there is any relationship between runx2 transcription factor and regulation of galectin-3 expression in different human thyroid carcinoma cell lines. To show effects of runx2 transcription factor on gal-3 expression, we developed runx2 knockdown model in the thyroid carcinoma cell lines; anaplastic 8505C and 8305C and, papillary TPC-1 and follicular FTC-133 by using siRNA transfection. We analyzed the protein expressions and mRNA levels of gal-3 and MMP2/9 in the runx2-silenced cell lines using Western blotting, qPCR, and fluorescent microscopy. Our results showed that mRNA expression levels of gal-3 and MMP2/9 were downregulated in runx2-silenced cell lines. In this investigation, we revealed that regulation of gal-3 expression was strongly correlated with runx2 transcription factor in human thyroid carcinoma. Considering the contribution of human gal-3 in collaboration with MMP2/9 to the malignant characters of many cancers, regulation of their expressions through runx2 seems like one of the key regulatory mechanism for malignant potential of human thyroid carcinoma. Accordingly, runx2 transcription factor inhibitors can be a potential target in order to prevent gal-3 mediated malignancy of human thyroid carcinoma. J. Cell. Biochem. 118: 3911-3919, 2017. © 2017 Wiley Periodicals, Inc.

Exendin-4 attenuates renal tubular injury by decreasing oxidative stress and inflammation in streptozotocin-induced diabetic mice.

In this study, we aimed to research the restorative effects of exendin-4, a GLP-1 analog, on renal tubular injury in streptozotocin-induced diabetes model. BALB/c male mice were divided into four groups: non-diabetic, non-diabetic + exendin-4 (3 µg/kg), diabetic and diabetic + exendin-4. In our diabetic model, we observed renal injury mainly in tubular area rather than glomeruli and exendin-4 decreased tubular injury with its glucose lowering effect. Besides, PCNA positive tubular cells, activities of LDH and Na(+)-K(+)-ATPase were also significantly declined by the administration of exendin-4. Furthermore, exendin-4 attenuated the levels of ROS, MDA, 8-OHdG, proinflammatory cytokines (TNF-α, IL-1ß), chemokine MCP-1, ICAM-1, and fibrosis-related molecules (transforming growth factor ß1 and fibronectin). In consistent with reducing tubular injury, macrophage infiltration and both MCP-1 and ICAM-1 production in tubular cells were decreased. These results indicate that exendin-4 may decrease renal tubular injury seen in the beginning of diabetic nephropathy by decreasing ROS production and inflammation.

The effect of smoking on spontaneous passage of distal ureteral stones.

BACKGROUND: Animal studies have shown that nicotine affects the peristalsis of the ureter. The aim of the study is to analyze the effect of smoking on spontaneous passage of distal ureteral stones. METHODS: 88 patients in whom distal ureteral stone below 10 mm diameter diagnosed with helical computerized tomography enhanced images were reviewed. Patients were grouped as either smokers (n:33) or non smokers (n:50). Follow-up for spontaneous passage of stones was limited with 4 weeks. Patients did not receive any additional medical treatment other than non-steroid anti inflammatory drugs only during painful renal colic episodes.Two groups were compared with the chi-square test in terms of passing the stone or not. Stone passage was confirmed with either the patient collecting the stone during urination or by helical CT. RESULTS: Smoking habits was present in 30(34%) patients and the frequency in both groups were similar (smokers: 23(76%) vs non-smokers: 46(79%)). Spontaneous passage of the stone was observed in 69(78%) patients. The two groups were comparable in terms of patient age, male to female ratio and stone size. Stone passage decreased as stone diameter increased. Total stone passage rates were similar in both groups (smokers: 76% vs. non-smokers: 79%) (p > 0.05). Passage of stones > 4 mm was observed in 46% and 67% of smokers and non-smokers respectively. However passage of stones with a diameter ≤ 4 mm were similar in both groups (smokers: 100% vs non-smokers: 92%) (p > 0.05). CONCLUSION: Smoking has neither a favorable nor un-favorable effect on spontaneous passage of distal ureteral stones. However, spontaneous passage rates in patients with a stone diameter > 4 mm was lower in smokers. These results should be further confirmed with studies including larger numbers of patients.

Total sialic acid profile in regressing and remodelling organs during the metamorphosis of marsh frog (Pelophylax ridibundus Pallas 1771).

This study aimed to investigate the functional relationship of sialic acid in regressing and remodelling organs such as the tail, small intestine and liver during the metamorphosis of Pelophylax ridibundus. For this purpose, four groups were composed according to developmental periods by considering Gosner's criteria (1964). Our findings showed that the sialic acid content of the larval tail has an opposite profile to cell death process. Although the sialic acid content of the small intestine and liver did not change evidently during metamorphosis, it increased after the completion of metamorphosis. Frog tail extensively exhibited cell death process and decreased proliferative activity and underwent complete degeneration during metamorphic climax. In spite of increased apoptotic index, a decreased sialic acid level in the tail tissues during climax can be the indication of a death cell removal process. However, the intestine and the liver included both cell death and proliferative process and remodelling in their adult forms. Thus, their sialic acid profiles during metamorphosis were different from the tail's profile. These data show that sialic acid may be an indicator of the presence of some cellular events during metamorphosis and that it can have different roles in the developmental process depending on the organ's fate throughout metamorphosis.

Pregnancy-Related Sacral Stress Fractures: A Single Center Experience of 23 Cases.

Purpose: This study aims to find out the incidence, etiology, and risk factors, define clinical features, show the magnetic resonance imaging (MRI) and laboratory findings, and share the experience of treatment and clinical outcome of pregnancy-related sacral stress fractures (SSFs). Methods: In total, 29,291 (15,008 of them vaginal and 14,283 of them cesarean section delivery) women gave birth in our hospital between January 2016 and December 2021. Twenty-three of them (0.078%) who had low back and pelvic pain were diagnosed with SSFs using pelvic MRI. Dual-energy X-ray absorptiometry (DEXA) was used to rule out underlying osteopenia and osteoporosis and determine the type of SSFs. Results: The incidence of pregnancy-related SSFs was 0.078% (23/29,291patients). Six patients (26%) experienced pain during the last trimester of pregnancy, remaining seventeen (74%) patients had pain during the postpartum period. 73.91% of the patients were primigravida. Thirteen patients (56.52%) were classified as fatigue SSFs, eight (34.78%) were insufficiency SSFs, and only two (8.7%) were defined as a mixed type of SSFs. MRI imaging showed that nine patients (39.13%) had a left-sided fracture, seven patients (30.43%) had a right-sided fracture, and seven patients (30.43%) had bilateral fractures. Vitamin D deficiency (less than 20 ng/mL) was detected in seven patients (30.44%). One case had hypothyroidism in which thyroid stimulating hormone (TSH) was 5.41 µIU/mL. Conclusion: Pregnancy-related SSFs are uncommon but should be considered by clinicians in the differential diagnosis of low back and pelvic pain during pregnancy and the postpartum period. We determined that first pregnancy is a risk factor for SSFs. The current study also revealed that laboratory investigation of vitamin D deficiency and DEXA investigation, which may lead to osteoporosis or osteopenia, were crucial in the diagnosis. Furthermore, some SSFs should be reclassified as mixed fractures, fatigue, and insufficiency fractures.

Correction: Pregnancy-Related Sacral Stress Fractures: A Single Center Experience of 23 Cases.

[This corrects the article DOI: 10.1007/s43465-022-00800-7.].

Spontaneous rectus sheath hematoma in three patients with COVID-19: Computed tomography findings.

The pulmonary symptoms secondary to severe acute respiratory syndrome in coronavirus (COVID-19) infections are the most common presentation for the disease; however, it is now known that in a small portion of patients, severe hemorrhagic complications can also be seen. In this report, three cases of elderly women with known COVID-19 infection, developing spontaneous rectus sheath hematoma on anticoagulation therapy, are presented. Three cases presented above emphasize the need to perform a computed tomography examination after a sudden hemodynamic deterioration and a decrease in hemoglobin count in COVID-19 patients in intensive care units (ICUs). Since this clinical deterioration can be caused by spontaneous rectus sheath hematomas (RSH), it must be taken into consideration while examination. If these RSHs rupture into the abdominal cavity, the outcome may be fatal in few hours as represented in two of our cases. Major spontaneous hemorrhage in COVID-19 patients is quite uncommon; therefore, it may cause serious complications as it is rarely taken into consideration. Failure to acknowledge such a risk could significantly worsen the prognosis of the patients especially in ERs and ICUs.

Tetralogy of Fallot and subglottic stenosis surgery with holmium laser in the same session.

The incidence of subglottic stenosis after pediatric cardiac surgery is around 0.57-2.3%. An 11-year-old female patient, who underwent modified Blalock-Taussig shunt surgery at the age of 4 months, was interned for total repair of tetralogy of Fallot. Subglottic stenosis was revealed in preoperative examination with indirect laryngoscopy. Total repair of tetralogy of Fallot was performed under cardiopulmonary bypass support. While the patient was still on cardiopulmonary bypass support, subglottic stenosis was treated by holmium laser successfully without a complication. In suitable patients, cardiac and endoscopic laryngeal operations can be successfully and safely performed under cardiopulmonary bypass with a holmium laser.

Evaluation of complex congenital heart disease with prospective ECG-gated cardiac CT in a single heartbeat at low tube voltage (70 kV) and adaptive statistical iterative reconstruction in infants: a single center experience.

The purpose of this study is to evaluate the radiation dose, image quality, and diagnostic accuracy of prospective ECG-gated cardiac CT at 70 kV and adaptive statistical iterative reconstruction (ASIR), with a single source, 512 slice MDCT in the diagnosis of complex congenital heart disease in infants. We retrospectively evaluated 47 infants (ages 1 day to 353 days) with prospective ECG-gated cardiac CT that was performed on a single source 512 slice CT at low tube voltage (70 kV) using a wide detector aperture, adaptive statistical iterative reconstruction algorithm (ASIR), and specific reconstruction software reducing coronary motion artifacts (SnapShot Freeze). All cardiac images were obtained during the first pass of contrast material through the anatomic structures of interest and the targets for the center of the acquisition window were set 45% of the R-R interval during one cardiac cycle without sedation and breath-hold. The median effective dose measured in our study was 0.64 ± 0.16 mSv. The average subjective overall image quality score was 4.34 ± 0.31 (range 3-5). For the determination of objective image quality, Mean Noise (HU), SNR, and CNR values ​​emerged as 20.8, 28.7(for pulmonary artery), and 27.1, respectively. Diagnostic accuracy was 100% for the main purposes for the main clinical indication. During cardiac CT examination, pathologies in addition to cardiac anomalies were found in 9/47 of cases (7 severe airway obstructions,1 posterior diaphragmatic hernia, 1 vertebral anomaly). Prospective ECG-gated cardiac CT scan at 70 kV and ASIR in infants with complex CHD provides low radiation dose (submillisievert) in a single heartbeat with a good objective and subjective image quality. It also provides important benefits in the diagnosis of additional pathology.

Distribution of prolactin receptor in frog (Rana ridibunda) dorsal skin during hibernation.

The role of prolactin in the regulation of frog skin functions is still unclear particularly during environmental changes. In this study, prolactin receptor (PRLR) was detected in active and hibernating frog dorsal skin using immunohistochemical method. PRLR immunoreactivity in active frogs was observed in the epidermis, in the secretory epithelium of granular glands and the secretory channel cells of the glands. Myoepithelial cells of granular glands that started accumulating secretory material or those with a full lumen were PRLR immunoreactive, while some myoepithelial cells of empty granular glands were negative for PRLR. In hibernating frogs, this immunoreactivity was observed in the same regions; however, immunoreactivity was more intense than that in active frogs. PCNA was employed for detection of proliferative activity of PRL in the dorsal skin, and immunoreactivity was detected in the nuclei of a few epidermis cells and in the duct of glands of active frogs. The number of immunoreactive nuclei in these regions increased in hibernating and in prolactin injected groups. We conclude that prolactin provides morphological and functional integrity of skin stimulating the proliferation and regulating the function of granular glands and plays an important role in the adaptation of amphibians to the long winter period.

Dilated right ventricular outflow tract in a young woman due to localized constrictive pericarditis: cardiac CT and MRI findings.

We present a case of a dilated right ventricular outflow tract (RVOT) in a 30-year-old woman because of localized constrictive pericarditis where the diagnosis was reached with the help of cardiac CT, and MRI. The patient was suffering from congestive heart failure for two years and had partial pericardiectomy 10 years ago. The diagnostic evaluation of the localized pericarditis requires a multimodality approach and suspected patients would benefit from simple tests, such as X-ray and echocardiography, but also furthermore complex imaging, including cardiac CT and MRI. To our knowledge, our case is the second case in the literature that show localized constrictive pericarditis presenting with giant RVOT and this is the first case that cardiac CT and MRI have been performed.

The Role of Dual-Energy Computed Tomography in Locating Gastrointestinal Tract Perforations.

Objective With each passing day, dual-energy computed tomography (DECT) is being used more frequently in the evaluation of abdominal pathologies. In this article, we aimed to assess the role of dual-energy CT in locating gastrointestinal perforations, which are among the causes of acute abdomen. Materials and methods All patients who underwent DECT due to acute abdomen in a COVID-19 designated hospital between June 1st, 2020 and December 31st, 2020, who were found to have gastrointestinal tract (GIT) perforation and underwent surgery were included in the study. DECT results and intraoperative findings of the patients were compared. Results Thirteen patients (nine males and four females) who underwent DECT for acute abdomen and were diagnosed with perforation in the gastrointestinal system were included in the study. The mean age of the patients was 57.6 years (range: 11-85 years). Two patients had gastric perforation, three had duodenal perforations, and one patient had a perforation in the gallbladder wall. Two patients were diagnosed with jejunal perforations, one patient with Meckel's diverticulum, and three patients with colorectal perforation. Although free air was detected in the abdomen of one patient, perforation could not be located. In patients with GIT perforation who were operated on following DECT imaging, the perforation location shown on DECT correlated 100% with the perforation locations detected during surgery. Conclusion DECT is significantly effective in planning surgical treatment and determining the foci of perforation in GIT perforations.

Ventriculocoronary Fistulas with Hypoplastic Left Heart in a Neonate: Imaging with Cardiac CT.

Fistulous communications between the ventricular cavities and the coronary arterial tree can be found in the presence of hypoplasia of the left ventricle, especially when the ventricular septum is intact and mitral stenosis and aortic atresia subtype are present. The cardiac CT provides excellent anatomic information especially in the evaluation of extracardiac vessels and coronary arteries. In this case study, we report a newborn with ventriculocoronary fistulas (VCFs) with the hypoplastic left disease diagnosed with cardiac CT. Transthoracic echocardiography of a term baby showed hypoplastic left heart syndrome (HLHS) with mitral stenosis and aortic atresia. The patient immediately underwent a Sano variation of the Norwood procedure. On the postoperative second day, the clinical status of the patient deteriorated. A prospective electrocardiogram-gated axial technique was performed within a single heartbeat for the patient and large VCFs were detected and a second operation were performed to close the VCFs that failed. On the nineteenth day after the operation, the baby passed away. According to us, cardiac CT can also be performed free-breathing and without anesthesia in the neonatal period for the definition of complex cardiac anatomy with the lower radiation dose from the latest scanners, radiation risk of CT should be weighed against the anesthesia risk of cardiac MRI and intraoperative risk of conventional cardiac angiography. Pre-operative cardiac CT may increase surgical success.