Intra-abdominal omental mass as a desmoplastic round cell tumor: A rare case report.

Key Clinical Message: Desmoplastic round cell tumor, though rare, must be taken into consideration as a differential diagnosis, thus aiding in early evaluation and changing the trajectory of the natural history of the disease condition, and improving the prognosis of patients. Abstract: Desmoplastic small round cell tumor is a rare, aggressive tumor of mesenchymal origin with an incidence of 0.74 cases per million. We present a young adult with a periumbilical mass who was diagnosed as a desmoplastic round cell tumor and later was treated with exploratory laparotomy and resection of the tumor with no recurrence during a 6-month follow-up period.

Appendicular actinomycosis: The first reported case of an uncommon finding of a common ailment from Nepal.

Key Clinical Message: Actinomycosis is a rare cause of appendicitis with an incidence of 0.3-1 incident per year per 100,000 people. A significant preoperative diagnostic challenge exists and is usually diagnosed incidentally on histopathological examination. Abstract: Appendicular actinomycosis, a rare, chronic granulomatous infection caused by actinomyces species, holds a significant preoperative diagnostic summons and is often diagnosed serendipitously during the regular histopathological examination. Herein, we present a case of a 36-year-old female who presented with features suggestive of acute appendicitis, underwent laparoscopic appendicectomy, and was diagnosed with appendicular actinomycosis from the histopathological examination.

Stress-relaxation properties of French fries as a function of moisture content, oil content, frying temperature, and testing temperature.

There is insufficient information on the effect of temperature, moisture content (MC), and oil concentration on the mechanical properties of fried potatoes. The static mechanical testing capabilities of a dynamic mechanical analyzer (DMA) were utilized to measure the stress relaxation function of fried potatoes as a function of frying time, temperature, and testing temperature. The French fries were prepared in oil heated at 177°C, 184°C, and 191°C, and their MC and oil content (OC) values were measured as a function of frying time. The samples loaded in DMA were subjected to 2% strain, and the stress relaxation was performed for 600 s. The DMA furnace temperature was set at 37°C, 60°C, and 90°C. A two-element generalized Maxwell model was fitted into the DMA data. French Fries lost more than 70% of their moisture and absorbed more than 80% of their final OC during the first 180 s of frying. During the same interval (up to 180 s), the relaxation modulus parameters (G0 , G1 , and G2 ) did not change significantly and then increased linearly. These parameters also did not change considerably for MC above 2 g/g solids. At lower MC values, G1 and G2 increased as the MC was reduced, but the elastic modulus G0 stayed almost constant, independent of the MC.

Cholecystopathia chronica calcarea (Porcelain gall bladder): A case report from Nepal.

Introduction and importance: Porcelain gall bladder is an uncommon end-stage modification of chronic cholecystitis, with an incidence ranging from 0.06 to 0.8% along with a plausibility of malignant transformation. Case presentation: We present a 55-year-old female presenting with complaints of epigastric and right hypochondriac region pain who underwent prophylactic laparoscopic cholecystectomy after making a provisional diagnosis of calcified gall bladder on a computed tomography workup. On histopathological examination, she was later diagnosed with a porcelain gallbladder devoid of features suggestive of malignant transformation. Clinical discussion: Porcelain gallbladder is a cholecystopathological condition in which the gallbladder wall gets calcified, either completely or partially. Though the exact pathomechanism of gallbladder calcification is unknown, it is believed to be due to chronic inflammation. Recent studies have shown that gallbladder calcification is associated with a lower risk of the development of gallbladder cancer. Imaging studies, followed by post-operative histopathological examinations, are used to diagnose the porcelain gallbladder. Though the management of asymptomatic patients is debatable, prophylactic cholecystectomy is the preferred treatment for symptomatic porcelain gallbladder patients. Conclusion: Individual porcelain GB patients should be addressed based on the presenting condition, whether surgically or via clinical monitoring and follow-up, taking into consideration the advantages and limitations of both treatment modalities.

Amyand hernia; a case report on serendiptous intra-operative diagnosis.

Introduction and Importance: Amyand hernia is an accidental finding that occurs in 0.19-1.7% of patients with inguinal hernia, with children being more commonly affected than adults. However, the management depends on the guidelines given by Losanoff and Basson. Case Presentation: A 62-year-old male presented with complaints of progressive swelling in the right inguinal region without any clinical spectrum of bowel obstruction or strangulation. Examination revealed a right-sided indirect inguinal hernia with positive Ziemann technique. Open hernioplasty revealed an appendix within a hernia sac and was found to be adhered to the surrounding structure with a fibrotic band. According to the Losanoff and Basson protocol, the patient had an appendectomy and an open mesh repair with polypropylene mesh without any post-operative complications. Clinical Discussion: Amyand hernia are often predominantly present in children, with a rare presence in the elderly. Pre-operative clinical diagnosis remains a challenge, and the management depends upon the Losanoff and Basson protocol. Appendectomy of the normal appendix within the hernia sac is often recommended to prevent the sequelae (appendicitis, rupture) following manipulation during hernioplasty. Conclusion: Amyand's hernia is a rare clinical entity and difficult to diagnose due to its uncomplicated presentation. Nevertheless, the progress of appendix inflammation, the possibility of abdominal sepsis, and co-morbidities should all be taken into consideration when deciding how to manage individual patients.

Sinistroposition: A case report on incidental finding of left sided gall bladder on laparoscopic cholecystectomy.

Introduction and importance: Left-sided gall bladder, a rare biliary abnormality with an incidence of 0.04-0.3%, is characterized by the presence of the gall bladder to the left of the ligamentum teres. However, they are often missed during pre-operative imaging and often encountered intraoperatively, thus challenging the surgical intervention for the surgeons. Case presentation: We herein present a 40-year-old male presented with colicky right hypochondriac pain and epigastric discomfort, diagnosed incidentally during laparoscopic cholecystectomy as a left-sided sided gall bladder without situs inversus, which was missed during pre-operative ultrasonography and was treated without any complications with conventional four-port technique without changes in the trocar placement. Clinical discussion: Gall bladder is normally found in the gall bladder fossa to the right of the ligamentum teres in the plane of the von Rex-Cantlie line; however, left-sided gall bladder is found to the left of the ligamentum teres and is frequently associated with inversus of the abdominal structures and associated vessels. They are frequently overlooked during preoperative diagnostic imaging, ultrasound for colicky discomfort, and encountered during intraoperative operations, confounding the treating surgeon's anatomic expertise. Intra-operative cholangiography is sometimes used as an adjunct, and operations can be accomplished with or without modifications in trocar position. Conclusion: Despite preoperative imaging, biliary abnormalities can be discovered accidently during laparoscopic cholecystectomy. Thus, diligent recognition of structures and related anomalies by the treating surgeon has a high value in the best possible outcome for the patient, and left-sided gall bladder can be done with minimum difficulty even without interposition of trocar placement.

Graphene nanosheets derived from plastic waste for the application of DSSCs and supercapacitors.

The present study reports the upcycling process of waste plastics into value-added product graphene nanosheets (GNs) and their subsequent applications in dye sensitized solar cells (DSSCs) and supercapacitors. Bentonite nanoclay has been used as an agent for the degradation of waste plastics with two step pyrolysis processes at 450 °C and 945 °C in an inert atmosphere of N2 gas to obtain GNs. The GNs with few layers were confirmed by the RAMAN spectroscopy, XRD and HRTEM analyses. Further, FT-IR and EDX analyses also performed for the identification and quantitative analysis of functional groups in GNs. The GNs thus synthesized from plastic waste have been used for the fabrication of DSSCs and supercapacitors. The DSSC fabrication with GNs as part of photo-anode with polymeric electrolyte showed a high fill factor of 86.4% and high Voc of 0.77 V, which were also supported by the computational findings. On the other hand, the utilization of GNs as an active layer material of supercapacitor electrodes offered a high specific capacitance of 398 F/g with a scan rate of 0.005 V/s. The supercapacitor also exhibited significant energy density (Ed) and power density (Pd) of 38 Wh/kg and 1009.74 W/kg, respectively. Thus, the process illustrated the utility of waste plastics upcycling for conservation of EEE i.e., ecology, economy and energy for better tomorrow.

High throughput detection and genetic epidemiology of SARS-CoV-2 using COVIDSeq next generation sequencing

The rapid emergence of coronavirus disease 2019 (COVID-19) as a global pandemic affecting millions of individuals globally has necessitated sensitive and high-throughput approaches for the diagnosis, surveillance and for determining the genetic epidemiology of SARS-CoV-2. In the present study, we used the COVIDSeq protocol, which involves multiplex-PCR, barcoding and sequencing of samples for high-throughput detection and deciphering the genetic epidemiology of SARS-CoV-2. We used the approach on 752 clinical samples in duplicates, amounting to a total of 1536 samples which could be sequenced on a single S4 sequencing flow cell on NovaSeq 6000. Our analysis suggests a high concordance between technical duplicates and a high concordance of detection of SARS-CoV-2 between the COVIDSeq as well as RT-PCR approaches. An in-depth analysis revealed a total of six samples in which COVIDSeq detected SARS-CoV-2 in high confidence which were negative in RT-PCR. Additionally, the assay could detect SARS-CoV-2 in 21 samples and 16 samples which were classified inconclusive and pan-sarbeco positive respectively suggesting that COVIDSeq could be used as a confirmatory test. The sequencing approach also enabled insights into the evolution and genetic epidemiology of the SARS-CoV-2 samples. The samples were classified into a total of 3 clades. This study reports two lineages B.1.112 and B.1.99 for the first time in India. This study also revealed 1,143 unique single nucleotide variants and added a total of 73 novel variants identified for the first time. To the best of our knowledge, this is the first report of the COVIDSeq approach for detection and genetic epidemiology of SARS-CoV-2. Our analysis suggests that COVIDSeq could be a potential high sensitivity assay for detection of SARS-CoV-2, with an additional advantage of enabling genetic epidemiology of SARS-CoV-2.

Autonomic reactivity to cold pressor test in prehypertensive and hypertensive medical students.

Autonomic reactivity to stress has been hypothesized to be a marker for subsequent neurogenic hypertension. Medical training is highly stressful particularly for those who are beginning their medical education. The present study was undertaken to study the autonomic reactivity to cold pressor test in prehypertensive and hypertensive undergraduate medical students. One hundred and seventeen undergraduate medical students between 17-21 years of age got examined for blood pressure and stress level. Twelve Hypertensives and eight prehypertensives selected from the above subjects and twenty normotensives underwent cold pressure test (CPT) to assess autonomic reactivity to laboratory induced stress. 10.25% of the subjects were found to be hypertensive and 6.83% pre hypertensive. On the stress scale 53% had mild stress, 7% showed moderate stress while none had stress as a major problem. There was no correlation between BP and stress score. On CPT, BP increased significantly in all the three groups (hypertensive, prehypertensive and normotensive) but came back to basal levels within 5 minutes indicating normal autonomic response. Rise of BP was higher in hypertensive group as compared to normotensive group. The rise of diastolic and mean BP during CPT was significantly higher in subjects having family history of hypertension. Forty percent of normotensive subjects had more than 20 mm Hg rise in systolic BP on CPT. Adolescents must be routinely screened to detect asymptomatic hypertension. The CPT may identify individuals with an occult physiological abnormality that predisposes them to hypertension in their later life.