Chest computerized tomography scan findings in 74 children with tuberculous meningitis in southeastern Turkey

This prospective study was done over seven years from 1996 to 2003 to investigate the chest computed tomography scan findings along with other radiologic examinations that included chest roentgenography and cranial computed tomography in children with tuberculous meningitis (TBM). Chest roentgenography demonstrated abnormal findings in 32 cases (43%) (hilar adenopathy, 32%; miliary pattern, 18%; bronchopneumonic infiltrate, 24%), while chest computerized tomography was abnormal in 65 cases (88%; p<0.005): mediastinal and hilar lymphadenopathy were present in 46% (p<0.005); miliary pattern, in 23% (p<0.05); and bronchopneumonic infiltrate, in 23% (p<0.05). Cranial computerized tomography was abnormal in 68 cases (92%). Chest computerized tomography scan helps establish the diagnosis of TBM when chest radiography is normal or inconclusive, and it is useful in assessing children with suspected TBM.     

Tuberculous granulomas in childhood tuberculous meningitis: radiological features and course

The clinical course and serial cranial computerized tomographic (CT) findings of 202 children with tuberculous meningitis (TBM) admitted to Tygerberg Hospital between 1985 and 1994 were reviewed with regard to the incidence, CT appearance and clinical course of associated intracranial tuberculous granulomas. Thirty-four patients (16.85 per cent) had associated intracranial granulomas. Thirty-eight individual lesions were analysed and classified as meningeal, parenchymal or ependymal according to their central nervous system (CNS) location. Twenty-five patients had round to irregular, brain iso-, hypo- or hyperdense meningeal granulomas with variable degrees of enhancement and peri-lesional hypodensities. Four patients had diffusely enhancing, brain isodense, enplaque-like ependymal granulomas associated with the ventricular ependymal lining. Four patients with miliary tuberculosis and TBM showed multiple small diffusely enhancing, brain iso- or hyperdense parenchymal lesions and associated hypodensities on initial CT. Although granulomas in the meningeal and ependymal group had the propensity to paradoxically enlarge or appear on standard four-drug antituberculosis therapy, the majority resolved uneventfully. Rapid resolution of small parenchymal granulomas associated with miliary tuberculosis occurred in all cases. Most granulomas in this series were co-incidental, asymptomatic CT findings. In rare cases, the development or enlargement of a strategically located granuloma may result in complications.     

Central nervous system tuberculosis in children: a review of 30 cases

The medical records of 30 children with central nervous system tuberculosis (CNS tuberculosis) who were treated between March, 1976, and February, 1989, were reviewed. All had cranial computerized tomography scans at presentation. The mean cerebrospinal fluid leukocyte count was 200/mm3, protein 239 mg/dl, glucose 25 mg/dl and CSF/serum glucose ratio 21%. Mantoux skin tests with 5 tuberculin units were greater than or equal to 10 mm induration in 50%, and chest radiographs were positive in 40% of patients. Hydrocephalus was demonstrated by cranial computerized tomography in all 30 patients (100%). Cranial computerized tomography scan demonstrating hydrocephalus is a sensitive radiographic nervous system tuberculosis and should be part of the early evaluation of children with suspected central nervous system tuberculosis.     

神经母细胞瘤中枢转移3例并文献复习

目的探讨神经母细胞瘤(neuroblastoma,NB)中枢转移的发生率、临床表现、影像学特征、病理及基因特征,以提高临床医生的认识。方法回顾分析2005年1月-2009年12月在北京儿童医院血液肿瘤中心治疗的3例NB中枢转移患儿的临床资料及其诊疗情况。结果 3例患儿的中枢转移分别表现为脑实质的孤立病灶、脑膜的弥漫转移和实质、脑膜均受累。3例患儿均有骨髓浸润、乳酸脱氢酶(LDH)升高,1例存在MYCN基因扩增,另2例未做。例1在常规化疗和手术治疗后获得部分缓解,无进展时间10个月,中枢为首次复发部位,例2、3在初诊时就存在中枢转移;例1、2最终放弃治疗,例3经过联合化疗,瘤灶切除以及自体干细胞移植等综合治疗后获得完全缓解。结论我院的NB中枢转移率为3.125%。NB中枢转移患儿通常存在骨髓浸润、LDH水平增高和不良的基因学特征。诊断依赖于临床表现和影像学检查,故定期的头颅MRI或CT检查非常必要。虽然预后很差,但积极治疗仍有希望完全缓解。     

Polymerase chain reaction in the diagnosis of tuberculosis

OBJECTIVES: To evaluate efficacy of polymerase chain reaction (PCR), using the insertion sequence IS6110 as target for DNA, to detect Mycobacterium tuberculosis in body fluids of children with suspected tuberculosis (TB). SETTING: Hospitalized patients. METHODS: A comparison of PCR on body fluids, Acid Fast Bacilli staining (AFB), mycobacterial culture and clinical features, with special emphasis on central nervous system (CNS) TB was done over 18 month period. A total of 80 children were evaluated, 41 with probable TB disease and 39 controls. Cases were defined by specific clinical criteria. Controls included patients free of clinical TB. PCR was done on the clinical specimens and compared with clinical findings, radiological features, Mantoux (Mx) testing, AFB staining and culture on Lowenstein-Jensen (LJ) medium. RESULTS: Sensitivity of PCR in CSF samples was 100%, in gastric aspirate samples was 20% and in pleural fluid samples was 100%. CONCLUSION: PCR technique may become a valuable diagnostic tool for the diagnosis of tuberculosis in children especially in CNS TB.     

Miliary tuberculosis in children: a review of 94 cases.

This is a retrospective review of the clinical, radiologic and laboratory features of 94 cases of childhood miliary tuberculosis seen during a 5-year period, 1985 to 1989. A history of Bacillus Calmette-Guérin vaccination was documented in 88% of children. The median age at presentation was 10.5 months, 52% of cases occurring in those younger than 1 year. The presenting symptoms were nonspecific: cough (72%); fever (61%); loss of appetite and weight (40%); and diarrhea and vomiting (33%). The main presenting signs were hepatomegaly (82%), splenomegaly (54%), lymphadenopathy (46%) and pyrexia (39%). Most of the patients were malnourished and anergic. Meningitis occurred in 19% of patients and this was the only significant risk factor identified for mortality, the overall case fatality rate being 14%. The diagnosis in the vast majority was made on the clinical presentation supported by a classic miliary pattern on chest roentgenogram (91% of cases). Mycobacterium tuberculosis was cultured in 33% of cases. In addition a review of hospital admissions from 1981 to 1989 revealed that annually miliary tuberculosis in children and adults accounted for 8.3 and 1.3%, respectively, of all tuberculosis admissions. This study confirms that miliary tuberculosis is a relatively common complication of tuberculosis in young children.     

Leptomeningeal metastases in pediatrics: magnetic resonance image manifestations and correlation with cerebral spinal fluid cytology

Background: Detection of leptomeningeal metastases is fundamental to a complete evaluation of central nervous system (CNS) or non‐CNS tumor with suspected involvement of the neuroaxis. Our purpose was to assess the appearances of different magnetic resonance (MR) sequences in the diagnosis of leptomeningeal metastases and correlate those positive findings with the cerebral spinal fluid (CSF) cytology results. Methods: The authors reviewed the medical records and MR image manifestations of leptomeningeal metastases from 18 children who had positive MR findings and retrospectively correlated them with CSF cytologic results. There was a uniform MR protocol and the patients were examined with the same sequences. Results: The abnormalities included pial‐arachnoid disease (n= 16), disease coating the nerves (n= 12), hydrocephalus (n= 3) and subependymal metastases (n= 2). Enhanced T1 images were better than unenhanced fluid attenuated inversion recovery (FLAIR) and T2 to delineate cranial and spinal leptomeningeal metastases. In our sample, seven out of 18 cases were cytologically negative on a single lumbar puncture. Conclusions: Contrast‐enhanced MR imaging can be invaluable, detecting the false‐negative lumbar punctures. FLAIR and diffusion images can be helpful in diagnosing leptomeningeal metastases of non‐enhancing primary tumors. Prognosis was more related to the primary tumor type than to the leptomeningeal enhancement MR pattern.     

Pediatric vs adult pulmonary tuberculosis: A retrospective computed tomography study

AIM: To compare the manifestations of chest tuberculosis (TB) in pediatric and adult patients based on contrast enhanced computed tomography of chest.METHODS: This was a retrospective study consisting of 152 patients of chest TB including 48 children and 104 adults who had undergone contrast enhanced computed tomography of chest prior to treatment. The patterns and severity of parenchymal, mediastinal and pleural manifestations were analyzed and compared among different age groups.RESULTS: Parenchymal changes observed include consolidation, air space nodules, miliary TB, cavitation, bronchiectasis and fibrosis and these were noted in 60% of children, 71% of adolescents and 76.9% of adults. These changes were more common in right upper lobe in all age groups. There was no significant difference in the frequency of these changes (except nodules) in different age groups. Centrilobular nodules were seen less commonly in children less than 10 years (P = 0.028). Pleural effusion was noted in 28 (18.42%) patients and pericardial effusion in 8 (5.3%) patients. No significant difference in the serosal involvement is seen among children and adults. Mediastinal adenopathy was seen 70% of children, 76.3% adolescents and 76.9% of adults and paratracheal nodes were seen most frequently. Nodes had similar features (except matting) among all age groups. Matting of nodes was seen more commonly in children (P = 0.014).CONCLUSION: Pediatric chest tuberculosis can have severe parenchymal lesions and nodal involvement similar to adults. The destructive lung changes observed in children needs immediate attention in view of the longer life span they have and hence in formulating optimal treatment strategies.     

Intermittent chemotherapy for miliary tuberculosis in children

Miliary tuberculosis is a severe manifestation of tuberculosis. Six children aged between two months and 10 years with the diagnosis of miliary tuberculosis were treated with intermittent antituberculous therapy for six, nine or 12 months. All the patients showed clearance of both clinical and radiological symptoms; there was no drug toxicity or resistance and no relapses were seen in the follow-up period ranging from nine months to nine years. Intermittent therapy is safe and effective in miliary tuberculosis and it may be an alternative therapy because of its minimal toxicity and lower cost.     

A study of tubercular antigen and antibody in childhood tuberculosis.

A radioimmunoassay for the detection of tubercular (TB) antigen (Ag) and antitubercular antibody (Ab) was evaluated for the serodiagnosis of childhood tuberculosis. Children with primary complex, progressive primary complex, miliary tuberculosis, and calcified lung lesions without clinical evidence of active tuberculosis were studied. Significantly elevated levels of TB Ag and TB Ab isolated from the circulating immune complexes were obtained in primary, progressive primary, and miliary tuberculosis patients as compared to controls (P less than 0.01). The majority of patients with calcified lung lesions and without active tuberculosis demonstrated high levels of antibody. It was observed that elevated levels of TB Ag and/or antibodies were present in 54 per cent of patients with primary complex, 94 per cent of patients with progressive disease and 69 per cent of patients with miliary tuberculosis. It is possible that is suspected patients with the above mentioned diseases, a diagnosis can be established by using these techniques.     

Extra-pulmonary tuberculosis in children

METHODS: The clinical and epidemiological features of 102 children with extra-pulmonary tuberculosis, diagnosed between 1982 and 1998 at P & A Kyriakou Children's Hospital were reviewed. RESULTS: During the past decade, a 50% increase of admissions for extra-pulmonary tuberculosis was observed. The source of infection was disclosed in 48 patients. Diagnoses included superficial lymphadenitis (n = 48), pleural effusion (n = 27), meningitis (n = 16), skeletal tuberculosis (n = 5), miliary tuberculosis (n = 3), abdominal tuberculosis (n = 2), and pericarditis (n = 1). Miliary tuberculosis developed in infants, lymphadenitis and meningitis in preschool children, and pleural effusion and skeletal tuberculosis in older children. None of the patients with extra-pulmonary tuberculosis died; however, six patients with meningitis developed permanent neurological deficits. In these patients, antituberculous treatment was introduced at a median of six days following admission as compared with one day in patients with no complications. Poverty, immigration, and limited access to medical services were common among patients with meningitis.     

Extra-pulmonary tuberculosis in children.

METHODS: The clinical and epidemiological features of 102 children with extra-pulmonary tuberculosis, diagnosed between 1982 and 1998 at P & A Kyriakou Children's Hospital were reviewed. RESULTS: During the past decade, a 50% increase of admissions for extra-pulmonary tuberculosis was observed. The source of infection was disclosed in 48 patients. Diagnoses included superficial lymphadenitis (n = 48), pleural effusion (n = 27), meningitis (n = 16), skeletal tuberculosis (n = 5), miliary tuberculosis (n = 3), abdominal tuberculosis (n = 2), and pericarditis (n = 1). Miliary tuberculosis developed in infants, lymphadenitis and meningitis in preschool children, and pleural effusion and skeletal tuberculosis in older children. None of the patients with extra-pulmonary tuberculosis died; however, six patients with meningitis developed permanent neurological deficits. In these patients, antituberculous treatment was introduced at a median of six days following admission as compared with one day in patients with no complications. Poverty, immigration, and limited access to medical services were common among patients with meningitis.     

Partial Anomalous Pulmonary Venous Drainage in Young Pediatric Patients: The Role of Magnetic Resonance Imaging

Studies of larger patient groups for systematic assessment of the anatomical accuracy of magnetic resonance imaging (MRI) for partial anomalous pulmonary venous drainage (PAPVD) have been performed so far only in adults. This study was undertaken to evaluate whether MRI can precisely depict pulmonary venous anatomy in infants and young children. Data on 26 children under 10 years old that underwent MRI over the past 2 years for suspected PAPVD were assessed. The MRI protocol included shunt quantification by velocity-encoded cine as well as morphological and functional assessment by multislice multiphase and contrast-enhanced MR techniques. MRI was performed in the compliant patient in breath-hold (n = 8; age range, 4.6–9.5 years) and in the noncompliant patient in conscious-sedation free breathing (n = 18; age range, 0.4 to 7.5 years). In 22 patients, PAPVD was diagnosed with MRI and confirmed during surgery. In four patients with large atrial septal defects not accessible to percutaneous closure, normal pulmonary venous return was demonstrated by MRI and confirmed during surgery. MRI under conscious sedation accurately specifies the anatomy of pulmonary veins in infants and small children. Therefore, we suggest performing MRI in patients with inconclusive transthoracic echocardiographic results in the preoperative assessment of PAPVD.     

儿科综合性医院结核病发病情况分析

目的 通过调查分析儿童结核病在非结核病专科的儿科医院的发病情况,进一步探讨儿童结核病的发病特点.方法 收集近九年收住的出院诊断为结核病的患者病史,并进行重新评估,对符合诊断的103例患儿的临床资料作回顾性分析.结果 结核病诊断率增加,以7～14岁年龄段发病率较高(占35.92%);19.2%有明显的结核病接触史,主要集中在4岁以下的儿童,传染源多为日常密切接触的家人;28%患儿结核菌素试验阴性,其结核类型主要为粟粒型肺结核、结核性脑膜炎等,中、重症结核病表现多见;结核病患儿中出现发热、咳嗽等症状者仅50%左右.结论 我国儿童结核病流行趋势严峻.各年龄段发病率不同,结核病患儿的临床表现多样化,临床诊断手段匮乏,需要进一步加强研究.     

Localized basal meningeal enhancement in tuberculous meningitis

Background Focal basal meningeal enhancement may produce a confusing CT picture in children with suspected tuberculous meningitis (TBM). Objective To demonstrate the incidence, distribution and appearance of localized basal meningeal enhancement in children with TBM. Materials and methods CT scans of patients with definite (culture proven) and probable (CSF suggestive) TBM were retrospectively evaluated by two observers. Localized basal enhancement was documented as involving: unilateral cistern of the lateral fossa (CLF), unilateral sylvian fissure, unilateral CLF and sylvian fissure in combination, unilateral CLF and sylvian fissure with ipsi- or contralateral ambient cistern and isolated quadrigeminal plate cistern. Results The study included 130 patients with TBM (aged 2 months to 13 years 9 months). Focal basal enhancement was seen in 11 patients (8.5%). The sylvian fissure was involved most commonly, followed by the lateral fossa cistern. The ambient cistern was involved in three patients and the quadrigeminal plate cistern in one. Focal areas of enhancement corresponded to the areas of infarction in every patient. Conclusion Focal basal meningeal enhancement is common (8.5%) in paediatric TBM. This must be kept in mind when evaluating CT scans in children presenting with focal neurological findings, seizures or meningism in communities where TBM is endemic.     

Atypical atrial septal defects in children: noninvasive evaluation by cardiac MRI

Background  Atypical left-to-right shunts at the level of the atrium in children such as sinus venosus atrial septal defects (ASDs) and partial anomalous pulmonary venous return (PAPVR) may be difficult to assess by transthoracic or transoesophageal echocardiography. Free-breathing cardiac MRI may be a powerful alternative. Objective  To assess the value of free-breathing cardiac MRI in the delineation of atypical ASDs in children. Materials and methods  A total of 82 children (mean age 5.9 years, range 1.1–15.7 years) with suspected ASD and inconclusive transthoracic echocardiography underwent cardiac MRI under free-breathing, mostly sedated conditions. Phase-contrast MRI was used for defect visualization and shunt quantification, and multiphase inflow MR angiography for delineation of pulmonary/systemic venous connections. Results  Of the 82 patients, 34 (41%) were diagnosed with atypical shunt lesions at the level of the atrium and 48 (59%) with simple secundum ASDs. No false-negative or false-positive findings were reported by MRI compared to cardiac catheterization and intraoperative findings. Superior sinus venosus ASD with partial anomalous PAPVR was present in 10 of the 82 children (12.2%), whereas 2 (2.4%) had a large posterior-inferior defect, 5 (6.1%) had isolated PAPVR, and 17 (20.7%) had multiple ASDs and/or associated vascular anomalies. Q_p/Q_s by phase-contrast MRI agreed well with oximetry values (mean difference 3%, limits of agreement ±21–25%; Bland/Altman analysis). Conclusion  Free-breathing cardiac MRI under sedation allows reliable identification of atypical left-to-right shunt defects at the level of the atrium in children in whom transcatheter ASD closure is unsuitable, including delineation of pulmonary or systemic venous anomalies and shunt quantification.     

Neuroimaging in tuberous sclerosis: A clinicoradiological evaluation in pediatric patients

CT, MRI and neurological features of 27 children with tuberous sclerosis were prospectively compared. Imaging studies were positive in 92.5% of cases. CT was more useful in detecting subependymal nodules, while MRI showed the number and location of cerebral cortical and subcortical lesions more accurately. Cortical lesions in the cerebellar hemispheres were present in 26% of patients. Gadolinium-DTPA used in 10 patients showed slight enhancement of the subependymal lesions in 80% of cases, probably representing active lesions with alteration of the blood-brain barrier. None of the cortical and subcortical lesions enhanced. Giant-cell astrocytomas were detected in 5 patients, the postcontrast CT and MRI studies improving their assessment. Unlike subependymal nodules, all tumors showed marked enhancement regardless of their size. Seizures were present in 96% of patients, mostly beginning before 1 year of age. There was no clear relationship between the radiological features and the neurological evolution of these patients. There-fore, it is not possible to establish a clinical prognosis based on the radiological findings. MRI is the procedure of choice in the diagnosis of tuberous sclerosis. When pre and postcontrast MRI are negative, CT is used to exclude small calcified subependymal nodules. MRI followup is required only when tumoral development is clinically suspected.     

Diagnostic criteria for Tuberculous Meningitis

Objective : Tuberculous Meningitis is associated with a high morbidity and mortality if there is a delay in diagnosis. The diagnosis is based on clinical evaluation since the bacteriological diagnosis takes time and has a low yield. This study attempts to validate these criteria in children with TBM.Methods : Forty-two children clinically suspected to have TBM were enrolled in the study. History, examination, CT scan and CSF findings were utilized to categorize patients into “definite”, “highly probable”, “probable” and “possible” TBM based on the criteria laid down by Ahuja et al. The validity of these criteria was tested against bacterial isolation and response to treatment.Results : Thirty one children, with complete data, were included for analysis. Using “improvement on therapy” as a criterion for definite TBM, we analyzed the sensitivity and specificity of the Ahuja criteria in diagnosing TBM. Using the criteria of “highly probable” TBM, the sensitivity was 65% with a specificity of 75%. When the criteria of “probable” TBM were used, the sensitivity increased to 96% while the specificity dropped to 38%. In an attempt to make these criteria more appropriate for children, we modified the criteria by including mantoux reaction, and family history of exposure in the criteria. The modified criteria gave a sensitivity of 83% and a specificity of 63%.Discussion : A sensitivity of 65% (highly probable group) implies that 35% of TBM patients will be missed, while the probable criteria gave a 63% false positive rate suggesting that the trade-off for a higher sensitivity makes the criteria very unreliable. Our modification of the criteria gave us a reasonable sensitivity of 83% with a higher specificity of 63%. The false positive rate was also reduced to 38%. Thus the modified Ahuja criteria worked better for children with TBM.Conclusion : The modified Ahuja criteria are better applicable for use in pediatric patients with TBM. Since the number of patients was small in this study, the study needs to be validated with a larger sample size     

Extrarenal rhabdoid tumours outside the central nervous system in infancy

Background  Malignant rhabdoid tumours (RT) are increasingly recognized in young children, probably as a consequence of advances in accurate histological diagnosis rather than a true increase in frequency. Although typically presenting as renal tumours in infancy, extrarenal tumours outside the central nervous system (CNS) in children less than 12 months of age are now well recognized, but previous literature on their imaging features is very limited. Objective  To demonstrate the imaging features of extrarenal RTs outside the CNS. Materials and methods  A retrospective database review was made from 1989 to 2007 of patients diagnosed with extrarenal RT in infancy, i.e. below 12 months of age. Results  There were nine patients (six boys and three girls). The age at presentation varied from 1 to 11 months (average 6 months). Tumours were located in the thorax/mediastinum (n=3), liver (n=3), neck (n=1), shoulder (n=1) and axilla (n=1). The imaging modalities used included US (n=8), CT (n=7) and MRI (n=6). Bone scan was positive in one patient, while metastases at the time of diagnosis occurred in four patients. On MRI the tumours tended to show nonspecific hypointensity on T1-W images and heterogeneous hyperintensity on T2-W images, with heterogeneous enhancement. Conclusion  This is the largest radiological series of extrarenal RTs outside the CNS in infancy. In our series no imaging features were found specific to the diagnosis. A tendency towards large size and mediastinal/paravertebral location were noted. A hypodense solid component on CT and a heterogeneous hyperintensity on T2-W MR images suggest that this tumour should be considered in the routine differential diagnosis of soft-tissue tumours in infancy, in addition to rhabdomyosarcoma.