Subclinical hypothyroidism and myocardial function in obese children.

BACKGROUND AND AIMS: Pediatric obesity is an important health problem representing a major public health concern worldwide in the last decades. An isolated elevation of Thyroid Stimulating Hormone (TSH) with normal levels of thyroid hormones is frequently found in obese children. It has been named Isolated Hyperthyreotropinemia or Subclinical Hypothyroidism (SCH) and may be considered a consequence of obesity. Evidence exists that SCH is related to impairment of both systolic and diastolic myocardial function in the adult population. The aim of our study is to establish if obesity-related SCH influences myocardial function in children. METHODS AND RESULTS: We examined 34 obese children and adolescents with SCH and 60 obese children with normal TSH levels who underwent Doppler echocardiographic to evaluate myocardial function. Global systolic function as assessed by Ejection Fraction (EF) was comparable between groups, however Right Ventricle pressure global systolic function and pressure were significantly reduced in SCH group. Mitral annulus peak systolic (MAPSE) excursion lateral and MAPSE septum resulted significantly reduced in SCH group. Tissue Doppler imaging peak systolic motion (TDI-S) was reduced in SCH group. Diastolic function also showed significant modifications in SCH group. CONCLUSION: These results suggest possible involvement of cardiac function in obese children with SCH resulting in both abnormal diastolic function and reduced longitudinal systolic function. This new insight into cardiovascular consequences of obesity-related SCH in children could influence clinical approach to such patients by pediatric endocrinologists.

New treatment modalities for obesity.

The treatment of childhood obesity represents a greater challenge for pediatricians. To date, it is multidisciplinary, including behavioral, dietary, pharmacological, and surgical options. Given the limited efficacy of available treatments, scientific research on finding new solutions is very active. Several drugs comprising Metformin, Glucagon-like peptide- 1 receptor agonists, Naltrexone-bupropion, Phentermine-Topiramate, and Lorcaserin have been studied as pediatric antiobesity agents. Findings from clinical trials showed a modest but significant effect of these drugs on weight loss, but long-term studies are needed to better define their exact role. Bariatric surgery is also promising for extremely obese adolescents. Moreover, a novel approach to treat obesity might be represented by compounds inducing browning of white adipose tissue, a complex process involved in body energy homeostasis, but at present evidence in humans is lacking. We aimed to review the current knowledge regarding the available new options for pediatric obesity treatment.

Familial idiopathic intracranial hypertension with spinal and radicular pain.

OBJECTIVE: To describe a mother and her 2 sons affected by idiopathic intracranial hypertension (IIH), associated in the sons with root irritation symptom. Unlike the other 4 families reported previously, obesity was not present in our patients. DESIGN: Case reports. SETTING: Department of pediatrics in a university school of Medicine, Naples, Italy. PATIENTS: A mother (aged 36 years) and her 2 sons (aged 14 and 9 years) developed IIH at different times. Neuroimaging showed an empty sella in the mother, while IIH was associated with spinal and radicular pain in her 2 sons. The mother and the younger son developed permanent visual loss. CONCLUSIONS: Ophthalmologic follow-up in our patients indicates that IIH is a chronic disease. Surgical treatment should be considered an option.

A girl with diabetes and severe combined immunodeficiency from adenosine deaminase deficiency.

We present a girl with severe combined immunodeficiency (SCID) from adenosine deaminase (ADA) deficiency who developed insulin dependent diabetes mellitus (IDDM). This combination of features has not been previously reported. Because HLA typing (DQbeta-57 Asp/Asp and DQalpha-52 Ser/Ser) showed no alleles usually associated with IDDM, and ICA were repeatedly negative even after treatment with PEG-ADA and gene transplant, hypotheses on the pathogenesis of diabetes mellitus in this patient are discussed.

[Isolated thrombosis of the splenic vein in an infant. Splenectomy and reimplantation of splenic tissue]. / Trombosi isolata della vena lienale in un lattante. Splenectomia e reinnesto del tessuto splenico.

The authors report a case of an infant affected by isolated thrombosis of splenic vein. They stress the necessity of a precious diagnosis in order to prevent the haemorragic consequences of distrectual portal hypertension. Splenectomy, the only therapeutic mean considered in these patients, has been followed, in our patient, by reimplantation of splenic tissue, in order to prevent the septic complicances (mainly due to pneumococcus) frequently occurring in splenectomized patients.

[Unusual course of a case of urethral rhabdomyosarcoma in a 10-year-old boy]. / Singolare evoluzione di un caso di rabdomiosarcoma uretrale in un bambino di 10 anni.

The authors report a case of rhabdomyosarcoma of posterior urethra they observed in a 10 year-old boy who was referred for an acute urinary retention. The story of the patient included other urinary tract troubles: macroscopic haematuria and stranguria had been observed when the boy was four year old and at that time cystography and cystoscopy grave normal results. In the following years the patient presented repeatedly episodes of haematuria, stranguria, dysuria and urinary tract infections. The authors stress the slow evolution of the tumor and the difficulties for diagnosing the disease in its early phase.

Long-term culture and T cell receptor analysis of T cell clones isolated from a patient with adenosine deaminase deficiency and type I diabetes.

We performed limiting dilution culture of T cells from a patient affected by primary immunodeficiency as a result of complete lack of adenosine deaminase (ADA) activity and also affected by insulin-dependent diabetes mellitus (type I diabetes). Despite the occurrence of immunodeficiency, we were able to raise and grow T cell clones derived from this patient in long-term culture. These T cells displayed ADA enzymatic activity and produced interleukin-2 after engagement of their T cell receptor (TCR)/CD3 complex. We analyzed the TCR repertoire of such clones by nucleotide sequencing of TCR beta chains. The results show that the T cell clones express different V beta but similar J regions. However, the CDR3 regions which are implicated in antigen recognition were found to be heterogeneous.

Suppression of rat epididymal sperm immunogenicity by a seminal vesicle secretory protein and transglutaminase both in vivo and in vitro.

The pretreatment of epididymal spermatozoa with SV-IV, one of the major secretory protein produced by the epithelium of adult rat seminal vesicles, was found to markedly decrease their ability to induce in vivo peritoneal macrophage activation, measured as class II major histocompatibility complex surface antigen expression, superoxide anion production, phagocytic activity, and antigen presentation. In addition, the treatment of spermatozoa with SV-IV produced a significant decrease of their immunogenicity evaluated in vitro by [3H]thymidine incorporation in splenocyte/spermatozoon co-culture. The concurrent presence of SV-IV and transglutaminase, an enzyme secreted in large amounts from the rat anterior prostate, amplified these phenomena. The suppression of the epididymal sperm immunogenicity is suggested to be of crucial importance for the prevention of the immune response to the sperm introduced in the immunocompetent female genital tract during coitus.

Insulin-dependent diabetes mellitus and severe atopic dermatitis in a child with adenosine deaminase deficiency.

We report a 2.3-year-old girl with complete lack of adenosine deaminase (ADA) activity who presented with severe atopic dermatitis and insulin-dependent diabetes mellitus but only mild recurrent infections. Abnormalities of immune function included profound depletion of CD8+ lymphocytes, hyperimmunoglobulinaemia E, and very low in vitro proliferative response to mitogens. Treatment with polyethylene glycol-conjugated ADA was followed by rapid amelioration of clinical and immunological conditions. The immunological and clinical features of this child suggest that the clinical spectrum of ADA deficiency may be broader than originally supposed.

Heterogeneity of the erythropoietic defect in two cases of Aase-Smith syndrome.

Here we report two children with Aase-Smith syndrome (triphalangeal thumbs and congenital red cell plasia). In vitro growth of erythroid colonies was normal in the first patient and totally absent in the other. In both patients, treatment with glucocorticoids induced remission of anemia. Our results suggest that the different growth patterns of erythroid colonies observed in the two patients could reflect the defect of erythroid differentiation occurring at discrete maturational levels.

Decreased adherence of polymorphonuclear neutrophils in children with viral infection.

The adherence of polymorphonuclear neutrophils was examined in 16 children affected by enteritis, pneumonia, hepatitis and infectious mononucleosis. The results were compared with those obtained in 30 healthy adult volunteers and in 15 healthy children of the same age. Adhesiveness was significantly higher in adults than in healthy children, and significantly higher in healthy children than in children with viral infection. In 7 patients tested one month after regression of the disorder, PMN adhesiveness had returned to normal.

Macroamylasemia in a 5-year-old girl.

In macroamylasemia, a macromolecular complex consisting of amylase linked to immunoglobulins circulates in the plasma and usually causes benign hyperamylasemia with low or normal amylasuria. Macroamylasemia is extremely rare in pediatric patients as it has been described in only four patients. We report herein the case of a 5-year-old girl with abdominal pain and macroamylasemia. To recognize macroamylase, we used agar gel electrophoresis, PEG precipitation, and fast protein liquid chromatography (FPLC). In our case, FPLC was found to be the most reliable method for the identification of the macromolecular complex. Macroamylasemia is merely a biochemical abnormality that is not associated with any kind of pathology. Its identification is therefore essential in order to avoid a wrong diagnosis, i.e., pancreatitis, with consequent inappropriate therapies.

Effect of measles-mumps-rubella vaccination on polymorphonuclear neutrophil functions in children.

Adherence, metabolic burst and chemotaxis of polymorphonuclear neutrophils (PMNs) were examined in 15 children before and seven days after measles-mumps-rubella vaccine administration. In all children, PMN functions were significantly reduced on the seventh day. Adherence, metabolic burst and chemotaxis tested in three subjects one month after vaccination had returned to normal values. Only two children presented transient hyperpyrexia. We conclude that measles-mumps-rubella vaccine administration suppresses PMN functions without clinical consequences. This is probably because attenuated strains of vaccine viruses do not replicate in lymphoid tissues as extensively as do wild-type strains.

Variable response to the diepoxybutane test in two dizygotic twins with Fanconi's anemia and flow cytometry for diagnosis confirmation.

Fanconi's anemia (FA) is a rare, genetically heterogeneous, autosomal recessive disorder characterized by bone marrow failure, congenital abnormalities, chromosome instability, and increased susceptibility to neoplasia. Congenital abnormalities vary in location and in severity and not all patients are affected. Although the primary defect of FA is unknown, hypersensitivity to the clastogenic effect of agents that introduce cross-links in the DNA, such as diepoxybutane (DEB), is a marker of the FA phenotype in patients suffering from aplastic anemia without the physical characteristics of the syndrome and, conversely, in cases with abnormalities in the preanemic phase. We report the case of two dizygotic twins suffering from FA with discordant hematologic data. The DEB test repeated several times in various laboratories yielded conflicting results, whereas cell cycle studies by flow cytometry revealed a pattern typical of FA patients. Moreover, the flow cytometric pattern was correlated with the clinical severity of the disease.

Interferon alfa therapy in an infant with juvenile chronic myelogenous leukemia.

We describe an infant with juvenile chronic myelogenous leukemia (JCML), the diagnosis of which was made by the characteristic clinical and hematologic findings. The absence of a related HLA-compatible donor for bone marrow transplantation coupled with the awareness that chemotherapy is usually ineffective prompted our decision to treat the patient with lymphoblastoid interferon-alpha [alpha(Ly)-IFN]. During the 26-month course of treatment with alpha(Ly)-IFN an incomplete regression of hematologic and clinical findings was achieved. The above results, along with the easy administration and absence of considerable side effects, suggest that alpha(Ly)-IFN may be a useful therapeutic tool in patients affected by JCML awaiting bone marrow transplantation.

Effect of interferon-alpha therapy in a patient with common variable immunodeficiency and chronic Epstein-Barr virus infection.

We report an 18-year-old boy with common variable immunodeficiency who presented with splenomegaly as well as left axillary and lateral cervical lymphadenopathy. Main laboratory investigations showed severe thrombocytopenia. Epstein-Barr virus (EBV) DNA was detected in the patient's throat-washing specimens and lymph node biopsy. Lymphocytes from the lymph node biopsy were also positive for EBV nuclear antigen. Serology for EBV and cytomegalovirus was negative. A therapeutic attempt with acyclovir did not influence the course of infection. Six months' treatment with human lymphoblastoid interferon-alpha (IFN alfa) brought about the normalization of clinical and hematologic conditions. Detection on throat-washing specimens carried out 1 year after therapy was negative. Our preliminary experience suggests that human lymphoblastoid IFN-alpha is a valid alternative in therapy of immunodeficient EB virus-infected patients.

Late onset Blueberry Muffin Syndrome following congenital rubella.

The authors report a case of congenital rubella in a 7-month-old female infant presenting a Blueberry Muffin Rash. Blueberry Muffin Syndrome is a cutaneous manifestation characterized by widespread maculo papular lesions of a reddish-blue or magenta colour, due to persistent dermal erythropoiesis in patients with congenital viral infections.