Richard D. Bellah

Transient Asynchronous Testicular Growth in Adolescent Males With a Varicocele

PURPOSEnWe assessed the testicular growth of adolescent males followed nonsurgically for the presence of left varicocele.nnnMATERIALS AND METHODSnWe retrospectively reviewed the charts of adolescent males with a diagnosis of unilateral left varicocele and ultrasound testis volume measurements seen during a 10-year period. A total of 161 boys underwent at least 2 testicular ultrasounds as part of the evaluation for left varicocele. Patients were excluded from study for a history of inguinal/scrotal pathology or endocrinopathy that could affect testicular size. Sonographic testicular volume was calculated using the Lambert volume (length x width x height x 0.71). The resulting volumes were compared to previously published criteria for surgical repair (15%, 20% and 2 cc size differentials).nnnRESULTSnOf the 71 boys with 3 followup ultrasounds 38 (54%) initially had a 15% or greater volume differential. After nonsurgical followup with ultrasounds for 2 years 60 boys (85%) had testicular volume differentials in the normal range (less than 15%). Of the patients 71% were spared potential surgery by size criteria and 50% were spared surgery by the same 15% volume differential criteria.nnnCONCLUSIONSnAdolescent males with unilateral left varicocele often demonstrate asynchronous testicular growth that usually equalizes in time. Therefore, sonographic testicular size measurement at a single point during adolescence is insufficient to determine the need for varicocelectomy. When contemplating varicocelectomy we recommend at least 2, and preferably 3, testicular volume measurements 1 year apart to establish accurately decreased left testicular volume compared to a normal right testis.

Ovarian torsion: Clinical and imaging presentation in children

Ovarian torsion is uncommon and has a nonspecific clinical presentation. To determine the impact of imaging on clinical management, the authors reviewed their recent experience with 12 children who had a total of 13 episodes of ovarian torsion. Three children presented as neonates, six were premenarchal, and three were postmenarchal. Ultrasound was the imaging study of choice. In all three neonates, ultrasonography showed complex abdominopelvic cysts indicating the need for surgery. In five of 10 episodes in older patients, ultrasonography showed a solid mass with an appearance strongly suggestive of torsion. Same-day surgery was performed in three patients, and the involved ovary was salvaged in one. Another patient had a small piece of normal-appearing ovary left in situ. This low rate of ovarian salvage is attributable to the combination of delay in patient presentation and surgical delay owing to the often nonspecific clinical and imaging presentation of ovarian torsion. A high level of clinical suspicion, expeditious imaging, and familiarity with the varied clinical and imaging presentations of ovarian torsion should decrease the surgical delay and improve the likelihood of ovarian salvage.

Prevalence of Tubo-ovarian Abscess in Adolescents Diagnosed With Pelvic Inflammatory Disease in a Pediatric Emergency Department

Objectives: The rate of tubo-ovarian abscess (TOA) in adolescents with pelvic inflammatory disease (PID) is reported to range from 17% to 20%. However, no reports have focused specifically on the adolescent patient presenting to the emergency department (ED), regardless of whether they are treated in the inpatient or outpatient setting. Recent changes in the 2002 Centers for Disease Control and Prevention (CDC) Guidelines for the Treatment of Sexually Transmitted Diseases and sexually transmitted infection screening programs are likely to have impacted both the prevalence of PID and the rates of its complications, particularly TOA. Given that most patients with PID are treated as outpatients, it is imperative to accurately assess the prevalence of TOA in this population. Therefore, we sought to determine the rate of TOA in female adolescents diagnosed with PID in a large urban pediatric ED. Methods: We performed a retrospective medical record review to assess the prevalence of TOA in adolescents diagnosed with PID in the ED by an attending physician in pediatric emergency medicine. All cases were identified on the basis of the clinical criteria from the 2002 CDC Guidelines for the Treatment of Sexually Transmitted Diseases. Data collected included historical and physical examination findings, and laboratory and radiological imaging results. Results: Three (2.4%; 95% confidence interval, 0.5-6.7) of 127 patients diagnosed with PID in the ED who had imaging or clinical follow-up were also found to have a TOA. The mean age of the patients was 16 years. Most patients (89%) had imaging studies performed within 24 hours; most of these studies (97%) were pelvic ultrasounds. Eleven patients did not have imaging but had clinical follow-up within 72 hours. Four patients were diagnosed with PID during the study period and were lost to follow-up. Conclusion: The rate of TOA in adolescents diagnosed with PID in an urban pediatric ED is much lower than the rates previously reported in adolescents. This lower prevalence may be attributed to the broader 2002 CDC guidelines for diagnosing PID. In addition, community-based screening programs for Chlamydia trachomatis and Neisseria gonorrhoeae may help to identify young women at risk for developing PID earlier in the course of infection.

Recognition of tubo-ovarian abscess in adolescents with pelvic inflammatory disease

PURPOSEnUltrasonography of the pelvis is commonly used to diagnose tubo-ovarian abscess (TOA) in patients with pelvic inflammatory disease (PID). Our objective was to determine whether the clinical features of PID differ in adolescents with and without TOA.nnnMETHODSnA retrospective design was used to derive and validate a clinical model differentiating adolescents with PID who did and did not have TOA. The study population consisted of hospitalized adolescents with a discharge diagnosis of PID. Of the 208 patients discharged from January 1, 1990, to July 31, 1993, 87 (42%) met published criteria for PID and comprised the derivation set. Of the 63 patients from August 1, 1993, to June 24, 1994, 30 (48%) met criteria and comprised the validation set. All patients had pelvic ultrasonography performed during hospitalization. The ultrasonography records were reviewed retrospectively for TOA, ovarian and uterine size, clarity of tissue planes, and endometrial or cul-de-sac fluid. Medical records were reviewed for sociodemographic characteristics, medical and sexual history, physical examination, laboratory results, and hospital course.nnnRESULTSnTOA was present in 17% of the derivation set and 20% of the validation set. A six-variable model developed on the derivation set performed best in differentiating the TOA and non-TOA groups: last menstrual period > 18 days prior to admission (60% and 17%), previous PID (53% and 22%), palpable adnexal mass (13% and 3%), white blood cell count > or = 10,500/microliters (33% and 64%), erythrocyte sedimentation rate > 15 mm/h (33% and 64%), and heart rate > 90/min (40% and 78%). In the derivation and validation sets, the model correctly identified 78 and 83% of the TOA groups and 88 and 77% of the non-TOA groups. The area under the receiver operating characteristic curve of the model was 0.92 in the derivation set and 0.87 in the validation set.nnnCONCLUSIONSnWe conclude that clinical characteristics help identify adolescents with acute PID who have TOA. These patients may have fewer signs of acute illness than those without TOA and may develop symptoms later in the menstrual cycle.

Transvaginal ultrasound in a children's hospital : is it worthwhile?

We report our experience with transvaginal sonography (TVS) in 35 nonpregnant adolescent and young teenage females referred for pelvic sonography. We assessed the efficacy of TVS as compared to transabdominal sonography (TAS) in 40 examinations. Of the 40 examinations, there were 5 discrepancies. In 4, abnormalities were detected on TVS not seen on TAS. In one there was a false-positive TAS with bowel recognized as such on TVS. Image quality (clarity, completeness, anatomic detail) was judged better by two reviewers on TVS in 85% of cases but additional useful information given in 58% of patients. TVS provided greater diagnostic confidence in 30% of patients with possible PID by better demonstration of fluid in the endometrial canal, pyosalpinx or tubo-ovarian abscess, or by better characterization of free pelvic fluid. The average scan time required for TVS was 8 minutes. TVS was better tolerated than TAS in the majority of patients. TVS is a relatively easy, rapid imaging technique that is well tolerated. It enhances anatomic detail and helps to elucidate unclear findings on TAS. TVS is also helpful in obsese patients and those unable to maintain a full bladder. It should be considered a useful and worthwhile adjunct to TAS in the evaluation of adolescent and teenagers with pelvic diseases.

Meconium Hydrocele in a Female Newborn: An Unusual Cause of a Labial Mass

Meconium peritonitis results from in utero perforation of the bowel and subsequent spillage of meconium into the peritoneal cavity. Free communication of the peritoneal space with the processus vaginalis during gestation permits formation of a meconium hydrocele. Meconium hydrocele has been reported in the newborn scrotum but to our knowledge there has been no previous report of meconium hydrocele in the labium of a female neonate. The predominance of meconium hydrocele in the male infant may be due to the obliteration of the processus vaginalis occurring later in the male than in the female fetus.

Giant hepatic regenerative nodules in Alagille syndrome

BackgroundChildren with Alagille syndrome undergo surveillance radiologic examinations as they are at risk for developing cirrhosis and hepatocellular carcinoma. There is limited literature on the imaging of liver masses in Alagille syndrome. We report the ultrasound (US) and magnetic resonance imaging (MRI) appearances of incidental benign giant hepatic regenerative nodules in this population.ObjectiveTo describe the imaging findings of giant regenerative nodules in patients with Alagille syndrome.Materials and methodsA retrospective search of the hospital database was performed to find all cases of hepatic masses in patients with Alagille syndrome during a 10-year period. Imaging, clinical charts, laboratory data and available pathology were reviewed and analyzed and summarized for each patient.ResultsTwenty of 45 patients with confirmed Alagille syndrome had imaging studies. Of those, we identified six with giant focal liver masses. All six patients had large central hepatic masses that were remarkably similar on US and MRI, in addition to having features of cirrhosis. In each case, the mass was located in hepatic segment VIII and imaging showed the mass splaying the main portal venous branches at the hepatic hilum, as well as smaller portal and hepatic venous branches coursing through them. On MRI, signal intensity of the mass was isointense to liver on T1-weighted sequences in four of six patients, but hyperintense on T1 in two of six patients. In all six cases, the mass was hypointense on T2- weighted sequences. The mass post-contrast was isointense to adjacent liver in all phases in five the cases. Five out of six patients had pathological correlation demonstrating preserved ductal architecture confirming the final diagnosis of a regenerative nodule.ConclusionGiant hepatic regenerative nodules with characteristic US and MR features can occur in patients with Alagille syndrome with underlying cirrhosis. Recognizing these lesions as benign giant hepatic regenerative nodules should, thereby, mitigate any need for intervention.

Contrast-enhanced voiding urosonography (ceVUS) with the intravesical administration of the ultrasound contrast agent Optison™ for vesicoureteral reflux detection in children: a prospective clinical trial

BackgroundContrast-enhanced voiding urosonography (ceVUS) is widely used outside the United States to diagnose vesicoureteral reflux (VUR) in children and is highly sensitive while avoiding exposure to ionizing radiation. At the onset of this study, two ultrasound (US) contrast agents were available in the United States. Pediatric safety data for intravenous administration was published for one, Optison™.ObjectiveThis study aimed to evaluate the diagnostic performance and safety of ceVUS using Optison™ and compare its diagnostic efficacy with voiding cystourethrogram (VCUG) for VUR detection and grading in children.Materials and methodsThe United States Food and Drug Administration and institutional Investigational New Drug authorizations were obtained to conduct a prospective comparative study of ceVUS with Optison™ and VCUG. CeVUS was performed with intravesical administration of 0.2% Optison™/normal saline solution. A standard VCUG followed. Safety assessment included physical examination, and heart rate, pulse oximetry and adverse reactions monitoring before, during and immediately after the examinations. A follow-up questionnaire was completed by telephone 48-h after the studies.ResultsSixty-two pelviureteric units were studied in 30 patients with a mean age of 3.5xa0years (range: 0.1–17xa0years) including 21 girls and 9 boys. No severe adverse events occurred. All patients had normal heart rate and blood oxygenation saturation prior to, during and after the studies. At the 48-h follow-up, one patient (3.3%) reported transient dysuria. Taking the VCUG as the reference standard, ceVUS had a sensitivity of 91.7% (95%; confidence interval [CI]: 61.5%–99.8%) and specificity of 98% (95%; CI: 89.4%–99.9%). The concordance between ceVUS and VCUG for VUR detection and grading was 84.3% and 81.8%, respectively. VUR grades were discrepant in 4/11 refluxing pelviureteric units, with VCUG upgrading VUR in 2.ConclusionDetection of VUR with Optison™ ceVUS was comparable to VCUG without exposure to ionizing radiation. CeVUS with Optison™ is a well-tolerated diagnostic procedure with a favorable safety profile.

Ultrasound of the pediatric appendix

Appendicitis is the most common pediatric surgical emergency. Ultrasound (US) receives the highest appropriate rating scale in children with right lower quadrant pain suspected to have appendicitis. The US exam of the appendix has improved since Puylaert pioneered the technique of graded compression in 1986. In this article, we review ultrasonography of the pediatric appendix as it pertains to the normal appendix, acute appendicitis and the different sonographic manifestations. We also briefly describe technical optimization of image acquisition, common pitfalls and differential diagnoses.

Sonographically Occult Abscesses of the Buttock and Perineum in Children.

BACKGROUNDnUltrasound (US) is used to differentiate abscess from cellulitis. At our institution, we observed children who had purulent fluid obtained after a negative abscess US. We sought to determine the incidence of sonographically occult abscess (SOA) of the buttock and perineum, and identify associated clinical and demographic characteristics.nnnMETHODSnRetrospective chart review including children younger than 18 years old presenting to pediatric emergency department with soft tissue infection of the buttock or perineum and diagnostic radiology US read as negative for abscess. We defined SOA as wound culture growing pathogenic organism obtained within 48 hours of the US. Clinical and demographic characteristics included age, sex, race, ethnicity, fever, history of spontaneous drainage, duration of symptoms, previous methicillin resistant Staphylococcus aureus (MRSA) infection, or previous abscess. We used univariate and multivariate logistic regression to assess correlation between these characteristics and SOA.nnnRESULTSnA total of 217 children were included. Sixty-one (28%) children had SOA; 33 of 61 (54%) had incision and drainage within 4 hours of the US. Of children with SOA, 49 (80%) grew MRSA and 12 (20%) grew methicillin-sensitive S. aureus. In univariate analysis, a history of MRSA, symptom duration 4 days or less, age of younger than 4 years, and Hispanic ethnicity increased the odds of having SOA. In multivariate analysis, history of MRSA and duration of 4 days or less were associated with SOA.nnnCONCLUSIONSnTwenty-eight percent of children in our institution with US of the buttock and perineum negative for abscess had clinical abscess within 48 hours, most within 4 hours. History of MRSA and shorter symptom duration increased the odds of SOA.