Circulating levels of miR-122 and nonalcoholic fatty liver disease in pre-pubertal obese children.

OBJECTIVES: The liver-specific miR-122 was proposed as biomarker for NAFLD in adults. Here, we investigated the relationship between miR-122 levels, parameters of liver metabolism and NAFLD in pre-pubertal obese children. METHODS: Parameters of liver metabolism (ALT, AST and GGT) of three European cohorts were included (German cohort [n = 71; age: 11.53 ± 1.29 years; BMI z-score: 2.96 ± 0.64], Italian cohort [n = 45; age: 9.60 ± 2.11 years; BMI z-score: 3.57 ± 1.16], Slovenian cohort [n = 31; age: 7.53 ± 1.47 years; BMI z-score: 3.66 ± 0.88]). MiR-122 levels and CK18 concentrations were measured in fasting blood samples. In the German and Italian cohort, the diagnosis of NAFLD and grading of NAFLD was assessed by ultrasound. RESULTS: NAFLD was diagnosed in n = 50 patients of the German cohort (29.6%) and in n = 29 patients (72.5%) of the Italian cohort. In all three cohorts, miR-122 was positively correlated with ALT and AST as well as with CK18 concentrations. MiR-122 levels were higher in children with NAFLD compared with healthy controls. CONCLUSIONS: MiR-122 levels in pre-pubertal obese children could be a potential biomarker for paediatric NAFLD.

Non-Alcoholic Fatty Liver Disease (NAFLD) in children and adolescents with Prader-Willi Syndrome (PWS).

We tested the hypothesis that patients with Prader-Willi syndrome (PWS) may be at lower risk of developing non-alcoholic fatty liver disease (NAFLD) because of a higher insulin sensitivity. Twenty-one PWS patients and 42 control subjects closely similar for age, gender, pubertal stage and body mass index (CNT), were studied. Metabolic profile and body composition were assessed. NAFLD was established by a validated method of US grading (range from G0 to G3). PWS patients showed a significantly better metabolic profile (lower waist circumference, fasting glucose levels, HOMA-IR, cholesterol, transaminase levels and trunk fat mass/fat mass ratio). Furthermore, NAFLD G1stage was significantly more frequent in PWS subjects (P < 0.05), whereas G2 stage was significantly more frequent in control patients (P < 0.05). NAFLD grading seems to correlate with body composition in PWS, also after adjustment for sex and GH treatment. To our knowledge, this is the first report suggesting a reduced risk of NAFLD in PWS children.

No thyroid abnormalities in patients submitted to cardiac catheterization in the first eighteen months of life.

BACKGROUND: No data are available about the risk of thyroid disturbance after exposure to low-dose radiation due to the use of cardiac catheterization in the first years of life. AIM: To determine the risk of functional and morphological thyroid abnormalities in a homogeneous cohort of patients who underwent diagnostic low-dose radiation for heart catheterization during the first 18 months of life. SUBJECTS AND METHODS: Fifty-five patients, submitted to cardiac catheterization during the first 18 months of life, underwent evaluation of the thyroid function and structure after a median period of 13 yr since the first radiation exposure. Sixty-eight unexposed controls matched for age and sex, underwent the same protocol. Twenty-two patients were then re-evaluated after a median period of 22 yr. RESULTS: Thyroid function resulted normal in both patients and controls. The prevalence of small thyroid nodules and inhomogeneous structures in ultrasound study was not augmented in irradiated patients compared to controls. No thyroid tumors or reduced thyroid volume were observed. CONCLUSIONS: Neither functional nor morphological disorders of the thyroid gland were demonstrated after a period up to 24 yr in patients exposed to diagnostic ionizing radiation for cardiac catheterization during the first 18 months of life.

Appendiceal abscess and right ovarian teratoma: a rare association.

Many pediatric patients presenting to the Emergency Department with acute abdomen are subject to one or even more than one imaging modalities in order to determine the reason for the patient's symptoms. Most of the times, imaging can render an accurate diagnosis and help clinicians and surgeons for the decision making plan and further management. In some circumstances, image findings are equivocal, non specific or simply misinterpreted and a correct diagnosis cannot been made preoperatively. Authors present a unique case of an unexpected acute appendicitis found during surgical exploration performed in order to remove an ovarian tumor in an eight-year-old girl.

Subinguinal microsurgical ligation--its effectiveness in pediatric and adolescent varicocele.

OBJECTIVE: Treatment of varicocele using a microsurgical vein ligation approach is a successful procedure when applied to adult patients. We performed this procedure in prepubertal and pubertal patients in order to verify its feasibility and effectiveness in a younger population. MATERIAL AND METHODS: Between January 1998 and December 1999, 46 patients (average age 13 years) were operated on for a left varicocele using a microsurgical selective vein ligation procedure. All patients were evaluated clinically and using color Doppler ultrasound (CDUS): 34/46 patients were classified clinically as grade III and the remaining 12 as grade II. We used a magnification loupe (x3) in 34/46 patients and an operating microscope (x 10-16) in the remaining 12. RESULTS: The procedure was successful in all but one patient (2.1%) who showed recurrence of the disease at the time of the first postoperative follow-up CDUS scan and required a repeat procedure. The average operative times were 45 and 60 min for loupe and microscopic procedures, respectively. In three cases (6.5%), early postoperative complications (wound infection and transient hydrocele) occurred and quickly resolved. All the patients were discharged within 24 h, returned to normal daily life within 2 days and resumed physical and sporting activities within 1 week. CONCLUSION: Subinguinal "artery- and lymphatic-sparing" microsurgical varicocelectomy, considered the gold standard treatment in adults, also proved to be successful in this preliminary experience with pediatric patients. The minimally invasive approach ensures the prevention of recurrences and/or postoperative complications, and is associated with a very low morbidity rate.

Percutaneous endoscopic cecostomy for antegrade colonic irrigation in fecally incontinent children.

The Malone surgical procedure for antegrade continence enema (ACE) greatly improves the quality of life of many patients with fecal incontinence but has several complications. This report describes a technique of percutaneous endoscopic cecostomy (PEC) which was applied in three children with fecal incontinence secondary to anorectal malformation or spina bifida. Using a pediatric fiberscope, a colonoscopy was done which reached the right colon. An intraoperative ultrasound examination confirmed the position of the cecum just below the layers of the abdominal wall. The cecostomy tube was then percutaneously inserted, imitating the steps of percutaneous endoscopic gastrostomy (PEG) using the pull technique. The preliminary results are very encouraging: there are no procedure-related complications in this small series; all the patients are able to carry out the antegrade enema by themselves; and complete control of defecation has been obtained.

[Nonspecific osteomyelitis in childhood and adolescence. The contribution of imaging diagnosis]. / Osteomieliti aspecifiche dell'infanzia e dell'adolescenza. Contributo della diagnostica per immagini.

Nonspecific osteomyelitis in children and adolescents can be diagnosed in patients 2 to 16 years old and may present as acute, subacute or chronic. During the last 9 years, 40 pediatric patients (aged 2 to 16 years) affected with extra-axial inflammatory bone lesions were examined. The series of cases was then reviewed. This work was aimed at investigating the role of various imaging modalities: conventional radiology (CR), bone scan with technetium-99 methylene diphosphonate (99mTc-MDP), scintigraphy with technetium-esamethylpropylenaminoxima labelled leukocytes (99mTc-HMPAO), computed tomography (CT) and magnetic resonance imaging (MRI) were used to detect the lesions, to make a differential diagnosis and to assess different disease stages. As for acute osteomyelitis (6 patients), CR showed a lytic lesion, periosteal new bone and soft tissue swelling in 4/6 patients; no abnormalities were demonstrated in the other two. Bone scan, CT and MRI depicted bone involvement. CT and MRI also showed inflammatory lesion spread to surrounding soft tissue. 99mTc-HMPAO scintigraphy was not performed in acute osteomyelitis, because of technical difficulties in performing the exam promptly; thus, the early diagnosis of lesion nature was made with bone biopsy. As for subacute osteomyelitis (23 patients), 99mTc-HMPAO scintigraphy was performed in 8/23 patients and proved to be a highly sensitive method, showing cell clusters and confirming the diagnosis of inflammatory lesion. MRI showed a focal area of intermediate-low signal intensity on T1-weighted sequences, with small focal intralesional areas of low intensity, a low-signal perifocal rim and diffusely low signal of surrounding bone marrow. T2-weighted images showed high signal intensity in both the abscess lesion and bone marrow, the latter probably due to edema. In 5 patients, a paramagnetic contrast agent (Gd-DTPA) was administered during MRI and showed inhomogeneous enhancement of both the inflammatory lesion and surrounding bone marrow. As for chronic osteomyelitis (7 patients), MRI was performed in 5/7 patients. In 4 patients the lesion appeared as a low-signal area on T1-weighted images while T2-weighted images showed an inhomogeneous high-signal area. In the same patients, 99mTc-HMPAO scintigraphy was always positive. In patient 5, the lesion was represented by a low-signal area on both T1 and T2-weighted images, while 99mTc-HMPAO was negative. Therefore, in chronic osteomyelitis, both MRI and 99mTc-HMPAO were useful in detecting both spinal and peripheral bone involvement, which was in some cases asymptomatic at first observation CR, CT (3/4) and MR (4/4) findings extra-axial localizations were similar to those in subacute-chronic forms.

Calcifying discopathy in infancy in the cervical spine: evaluation of vertebral alterations over a period of time.

Calcifying discopathy in infancy involving in the cervical spine has already been observed and described by many authors, as a well-defined clinico-radiological syndrome with a benign course. The clinical picture is composed of: pain and functional limitation, sometimes with a stiff neck, more rarely slight fever, increase of the erythrocyte sedimentation rate or leukocytosis. The radiographic picture consists of the association of morphological and structural alterations of vertebral bodies adjacent to one or more disc calcifications usually centrally sited, sometimes associated with anterior or posterior herniations. On the basis of the observation of 7 patients of up to 15 years of age, the authors propose to evaluate the changes of both the vertebral bodies and the discs involved in the disease over a period of time. The repetition of even modest alterations, that persist in time, testify to the involvement of the vertebral growth perhaps, more than the discal alterations connected with the calcification.

A case of a thoracic vertebral body dislocation without neurological signs in a child with neurofibromatosis.

In a 10-year-old child with neurofibromatosis, dislocation of a thoracic vertebral body was noted almost by accident; a singular dislocation unaccompanied by neurological symptoms.