ED diagnosis of peritoneal carcinomatosis.

PURPOSE: The goal of our study was to better characterize new CT diagnoses of peritoneal carcinomatosis (PC) in the ED, and to evaluate how to best identify the primary lesion. Prompt identification of the source of the carcinomatosis may allow for the patient to receive early initial care from the correct clinical service. METHODS: All new CT cases of PC-like appearance identified on CT in the ED from January 2017 through July 2020. Each report and corresponding medical record were manually reviewed. Patient demographics, presence/absence of intravenous contrast, source organ predicted by the radiologist in the CT scan report, pathologic diagnosis, and amount of ascites were tabulated. Chi-tests were used to test the statistical significance of differences between groups. RESULTS: Of the 131 CT cases of new PC-like appearance which received workup, 108 cases had pathologically proven PC and 23 cases had no underlying malignancy yielding a positive predictive value for actual PC of 82%. The most common cause of new PC in women was gynecological (66%), and in men was of GI tract origin (57%). Concordance between radiologist prediction and final pathology was higher with intravenous contrast (58%) compared to without contrast (40%); although this difference was not statistically significant (p = 0.19). A moderate or large amount of ascites was found in more than half of GYN primaries and in adenocarcinoma of unknown primary and there was a statistically significant difference in amount of ascites between cancer primaries (p = 0.01). CONCLUSION: A PC-like appearance on CT in the ED will likely be in patients with known malignancy, but of the new cases, there is a high PPV for it to represent new peritoneal carcinomatosis. Gynecological and GI malignancies are the most common cause in women and men, respectively, and this may help in focusing the radiologist's search pattern. Usage of intravenous contrast may help in identifying a primary lesion, and the presence of high-volume ascites should suggest a GYN primary or adenocarcinoma of unknown primary when there is no other obvious primary lesion.

Cecal volvulus after robotic assisted laparoscopic hysterectomy in a gynecologic oncology patient: A case report.

Cecal volvulus is a rare and life-threatening cause of intestinal obstruction with multiple risk factors including prior abdominal surgery and cecal hypermobility. Although its incidence has been reported after common procedures such as cholecystectomy and appendectomy, it has not been well studied after laparoscopy, especially in gynecological surgeries. If untreated, a cecal volvulus can result in serious complications such as intestinal strangulation, necrosis, or perforation. Therefore, early identification of risk factors and intervention is important in prevention of these sequelae. Here, we report a case of cecal volvulus in a patient with endometrial carcinoma after a staging robotic-assisted laparoscopic hysterectomy and the risk factors that may have led to her complication.

Radiologic blind spots in hip and pelvic radiographs.

PURPOSE: The purpose of our study was to identify the locations at which hip and pelvic fractures are commonly missed on radiographs. METHODS: A retrospective study was performed at four non-Level 1 trauma center emergency departments. IRB approval was obtained. All emergency department hip or pelvic radiographs with subsequent CT performed within 48 h were identified from 2017 to 2022. Reports for each radiograph and CT were scored for the presence or the absence of fracture in the following locations: ilium, sacrum, superior pubic ramus, inferior pubic ramus, pubis, acetabulum, subcapital femoral, femoral neck, greater trochanter, lesser trochanter, intertrochanteric, and subtrochanteric. The CT report was used as the gold standard. The false-negative radiography cases were reviewed on a PACS workstation to determine whether the case had an "unexpected miss" of a fracture, a subtle fracture, radiographically occult fracture, or exam was limited by artifact. The percentage of missed fractures at each location was calculated. RESULTS: Nine hundred seventy-five radiography cases with subsequent CT were identified. One hundred forty-six cases did not meet entry criteria; therefore, 829 cases were analyzed further. Seventy-four percent of patients were female with age of 74 ± 16 (mean ± standard deviation) years (range 1-103). Three hundred fifty-two cases had at least one fracture, and many cases had multiple fractures. There were 68 false-negative cases. The most commonly missed fractures by percentage were pubis, ilium, and greater trochanter. The most common unexpectedly missed fractures were greater trochanter and femoral subcapital. CONCLUSION: A careful systematic evaluation of hip and pelvic radiographs, with particular attention to the pubis, ilium, greater trochanter, and subcapital region, may improve radiographic fracture detection and decrease delays in diagnosis.

Resident pre-dictation of ED case delay signoff of those reports, but overall, residents improve report turnaround time.

PURPOSE: In academic radiology departments, attendings and resident are increasingly working together overnight for Emergency Department (ED) radiology coverage. The purpose of this study was to quantify reporting turnaround time for overnight cases read by residents and for overnight shifts with residents on duty. METHODS: A retrospective study was performed at a hospital system where one overnight attending covers two hospitals with a 2nd/3rd year overnight resident, and a second overnight attending covers two other hospitals 80% of the time independently and 20% of the time with a fourth-year resident. In the first analysis, the median difference in turnaround time, from the time when the case was completed by the technologist to the time the attending finalized it, between cases read independently by attendings and cases pre-dictated by residents was calculated. In the second analysis, the median difference in turnaround time for all cases performed at the second two hospitals was compared on nights when an attending was on duty alone versus nights when a fourth-year resident was also on duty, regardless of if the resident had pre-dictated the case. RESULTS: For computed tomography (CT), radiographs (XR), and ultrasound (US), there was a significant delay in turnaround time for cases pre-dictated by residents compared to cases read independently by attendings, ranging between 11 and 49 min depending on resident seniority and modality (p ≤ 0.001). For all cases on nights with a 4th year resident working, overall median report turnaround time decreased by 7 min (p < 0.001). CONCLUSION: Resident pre-dictation causes delay in the finalization of individual CT, US, and XR reports; however, overall, working with residents results in a significant decrease in report turnaround time supporting the belief that overnight resident education does not delay patient care.

Acute Appendicitis in Pediatric Patients With Sickle Cell Disease: Lower Incidence, More Imaging, and More False-Positives.

OBJECTIVE: Patients with sickle cell disease (SCD) experience recurrent pain crises, which may mimic appendicitis. A prior study found a significantly lower rate of appendicitis in patients with SCD compared with national averages. We investigate the incidence of appendicitis and number of imaging studies for appendicitis in pediatric patients with SCD. METHODS: Using a retrospective study design from a single institution, SCD and control cohorts were created. Inclusion criteria included age 0 to 21years and at least one follow-up appointment within 24 months. Length of observation was calculated from initial presentation to either inpatient admission for appendicitis or last clinic visit. Analysis of an SCD subgroup and a control subset (n = 1,596) was used to compare the number of imaging studies. Incidence rates of appendicitis and number of appendicitis studies were determined. Z-tests, binomial enumeration exact tests, and Fischer's exact tests were used. RESULTS: The SCD cohort included 1,064 patients between January 1, 2001, to December 31, 2014, and the control cohort included 115,109 patients without SCD between January 1, 2011, and December 31, 2011. Incidence rate of appendicitis per 10,000 patient-years was significantly lower in the SCD group compared with controls (2.9 cases versus 10.7 cases per 10,000 patient-years; P = .044). Additionally, the SCD group received significantly more ultrasounds (148 versus 60 per 10,000 patient-years; P< .0001) and CTs (94 versus 27 per 10,000 patient-years; P< .0001) for appendicitis, which remained significant when controlling for race. Patients with SCD also received more false-positive scans. DISCUSSION: Patients with SCD had a significantly lower incidence of appendicitis than controls, yet had a higher number of imaging tests performed for appendicitis. Appendicitis should be viewed as a less common cause of acute abdominal pain in SCD. This consideration should help guide imaging strategy.

Non-traumatic hemoperitoneum in the ED setting: causes, characteristics, prevalence and sex differences.

PURPOSE: Prevalence and sex differences of non-traumatic hemoperitoneum in the Emergency Department has not been studied in the literature. METHODS: Following IRB approval, multiple keyword searches were used to identify all cases of hemoperitoneum over a 55-month period. Cases were reviewed to confirm and quantify the hemoperitoneum. Maximum attenuation was used to grade blood density. Medical records were reviewed to determine cause, interventions and outcomes in each patient. RESULTS: Of the 171 verified cases of non-traumatic hemoperitoneum, 76% of cases were in women. CT exams in women were positive for hemoperitoneum 0.25% of the time, while 0.13% were positive in men. Regarding size, 25.7% were large, 24.5% were moderate and 49.7% were small. Contrast-enhanced studies had HU values of 103 ± 19 (range 47-146) which were significantly higher than for non-enhanced studies with values of 82 ± 19 (range 43-121, p < 0.001). The most common cause of non-traumatic hemoperitoneum was ruptured ovarian cyst which was found in 58% of women (76 cases). Of these, 69 patients received observation, 6 patients underwent surgery and 1 patient received Vitamin K. For the 95 non-ovarian cyst cases, 65% patients were admitted and then discharged, 22% were discharged from the ED, 12% expired and 1% were transferred to a different hospital. Post-procedure hemorrhage was the second to most common cause in women (24/130 = 18%) and the most common etiology in men (14/41 = 34%). CONCLUSIONS: In women, ovarian cyst rupture was the most common etiology of hemoperitoneum. Post-procedure hemorrhage was second in women and the most common etiology in men. Although unusual causes of hemoperitoneum will be encountered, understanding the most common causes of hemoperitoneum can provide a reasonable starting point when attempting to determine the most likely etiology of hemoperitoneum in any individual patient.