Delta Radiomic Features Predict Resection Margin Status and Overall Survival in Neoadjuvant-Treated Pancreatic Cancer Patients.

BACKGROUND: Neoadjuvant therapy (NAT) emerged as the standard of care for patients with pancreatic ductal adenocarcinoma (PDAC) who undergo surgery; however, surgery is morbid, and tools to predict resection margin status (RMS) and prognosis in the preoperative setting are needed. Radiomic models, specifically delta radiomic features (DRFs), may provide insight into treatment dynamics to improve preoperative predictions. METHODS: We retrospectively collected clinical, pathological, and surgical data (patients with resectable, borderline, locally advanced, and metastatic disease), and pre/post-NAT contrast-enhanced computed tomography (CT) scans from PDAC patients at the University of Texas Southwestern Medical Center (UTSW; discovery) and Humanitas Hospital (validation cohort). Gross tumor volume was contoured from CT scans, and 257 radiomics features were extracted. DRFs were calculated by direct subtraction of pre/post-NAT radiomic features. Cox proportional models and binary prediction models, including/excluding clinical variables, were constructed to predict overall survival (OS), disease-free survival (DFS), and RMS. RESULTS: The discovery and validation cohorts comprised 58 and 31 patients, respectively. Both cohorts had similar clinical characteristics, apart from differences in NAT (FOLFIRINOX vs. gemcitabine/nab-paclitaxel; p < 0.05) and type of surgery resections (pancreatoduodenectomy, distal or total pancreatectomy; p < 0.05). The model that combined clinical variables (pre-NAT carbohydrate antigen (CA) 19-9, the change in CA19-9 after NAT (∆CA19-9), and resectability status) and DRFs outperformed the clinical feature-based models and other radiomics feature-based models in predicting OS (UTSW: 0.73; Humanitas: 0.66), DFS (UTSW: 0.75; Humanitas: 0.64), and RMS (UTSW 0.73; Humanitas: 0.69). CONCLUSIONS: Our externally validated, predictive/prognostic delta-radiomics models, which incorporate clinical variables, show promise in predicting the risk of predicting RMS in NAT-treated PDAC patients and their OS or DFS.

Neurectomy versus Nerve Sparing in Open Inguinal Hernia Repair: A Randomised Controlled Trial.

OBJECTIVE:  To determine the effect of neurectomy in reducing the frequency of chronic inguinodynia after mesh hernioplasty in open inguinal hernia repair. STUDY DESIGN: Single blind randomised controlled-trial. PLACE AND DURATION OF STUDY: Surgical Unit-I, Department of General Surgery, Services Hospital, Lahore, Pakistan from September 2018 to September 2019. METHODOLOGY: All male patients undergoing open groin hernia surgery were included in the study. A total of 100 patients were randomly categorised into group A (neurectomy group) and group B (nerve sparing group). Patients were followed up for three months for the development of chronic inguinodynia. Signifiance was determined at p <0.05 using Chi-square and Fisher's exact tests. RESULTS: Out of 100 patients, 50 patients were enrolled in group A, while 50 were enrolled in group B. Mean age of patients was 42.1 ± 17.5 years. The median (IQR) acute pain score in neurectomy group was 3.0 (2.0-4.0), while median (IQR) acute pain score was 4.0 (3.0-6.0) in nerve sparing group with statistically significant difference (z = -3.256, p = 0.001). The frequency of chronic inguinodynia was significantly less in group A compared to group B [3 (6%) vs. 13 (26%), p = 0.012]. CONCLUSION: Excision of ilioinguinal and iliohypogastric nerve in inguinal mesh hernioplasty reduces the frequency of chronic inguinodynia. Ilioinguinal neurectomy may be practised routinely in patients undergoing Lichtenstein mesh hernioplasty.   Key Words: Inguinal neurectomy, Inguinal hernia, Chronic inguinodynia, Lichtenstein mesh hernioplasty.

Acute Presentation and Management of Abdominal Tuberculosis.

OBJECTIVE: To study the clinicopatholgical profile and outcomes of surgical management of abdominal tuberculosis (ATB) Study Design: Cross-sectional observational study. PLACE AND DURATION OF STUDY: Department of Surgery, Services Hospital, Lahore, Pakistan, from May 2008 to April 2018. METHODOLOGY: All patients who underwent emergency laparotomy during the study period due to abdominal tuberculosis, and consented to participate in the study were included. Demographic variables and type of surgical procedure performed were recorded. Patients were followed-up for histopathology, recurrence, or any anti-tuberculous therapy related complications at 1, 4, 6, and 12 months. Data were analysed using SPSS version 21. RESULTS: Out of the 80 patients, 36 were males and 44 were females. The median age was 23.5 years (range = 11-90 years). Mean weight of the patients was 48.7 ±12.2 kg. Commonest presenting symptom was abdominal pain 72 (90%). On exploration, ileocecal region was most commonly involved segment 68 (85%). Stoma formation was the most common surgical procedure performed in 59 (73.8%) patients. Complications and mortality rate were 48 (60%) and 7 (8.7%), respectively. A significant relationship of complications was found with prolonged hospital stay (p <0.001). CONCLUSION: Abdominal tuberculosis is a major public health concern. Vague symptoms lead to diagnostic delay so patients present late with intestinal obstruction. Ileocecal tuberculosis is the most common site of involvement.

Stone in the distal jejunum presenting as small bowel obstruction: A case report.

INTRODUCTION: Gallstone ileus is a rare presentation of cholelithiasis accounting for around 4% of cases of small bowel obstruction under 65 years of age but rises to 25% in those more than 65 years of age. Most gall stones, if impact in the bowel, are seen to lodge at the ileocecal valve as this is the most narrow part of the bowel. PRESENTATION OF CASE: We present a case of small intestinal obstruction because of a gallstone stuck in the distal jejunum. Patient was explored and one-stage surgery was done i.e. cholecystectomy, enterotomy and stone retrieval, and fistula repair. Our patient had uneventful postoperative recovery and was discharged after a week. DISCUSSION: Gallstone ileus is a rare entity presenting a significant diagnostic challenge to surgeons due to lack of specific findings. Moreover, the surgical management options to be adopted are diverse and depend upon the condition of the patient. Stable patients can be managed with two-stage procedures i.e. enterotomy and stone retrieval earlier with cholecystectomy in an elective setting. Our patient was managed with one-stage procedure i.e. cholecystectomy was done in the same setting and our patient did well. CONCLUSION: Gallstone ileus needs to be kept in the differential diagnosis list of intestinal obstruction in middle aged patients even in the absence of history of gallstones as this may be the first presentation of gallstone disease.

Undifferentiated vasculitis or an evolving systemic autoimmune rheumatic disease?

Undifferentiated connective tissue diseases usually present with arthralgias, sicca symptoms, Raynaud's phenomenon and leucopenia. This case presents the atypical presentation of an undifferentiated connective tissue disease with extensive cutaneous involvement of fingers and toes leading to gangrene with absence of typical rheumatological symptoms. The autoimmune profile showed positive ANA and anti-Ro/SS-A. Thromboembolism was ruled out on the basis of transthoracic and transesophageal echo. She was treated with I/V corticosteroids and cyclophosphamide that halted the disease progression.