A study of pulmonary hydatid disease in children. 1. Epidemiological and clinical characteristics

Primary cerebral cystic echinococcosis in a child from Roman countryside: Source attribution and scoping review of cases from the literature

BACKGROUND

Human cystic echinococcosis (CE) is a zoonotic parasitic infection caused by the larval stage of the species belonging to the Echinococcus granulosus sensu lato (s.l.) complex. Parasitic cysts causing human CE are mainly localized in the liver and in the lungs. In a smaller number of cases, larvae may establish in any organ or tissue, including the central nervous system (CNS). Cerebral CE (CCE) is rare but poses serious clinical challenges.

METHODS

This study presents a case of CCE in a child living in the countryside near Rome (Italy), along with a comparative molecular analysis of the isolated cyst specimens from the patient and sheep of local farms. We also systematically searched the literature to summarize the most relevant epidemiological and clinical aspects of this uncommon localization.

FINDINGS

The comparative molecular analysis confirmed that the infection was caused by E. granulosus sensu stricto (s.s.) (G3 genotype), and most likely acquired in the family farm. The literature search identified 2,238 cases of CCE. In 80.51% of cases, brain was the only localization and single CCE cysts were present in 84.07% of cases. Mean patients' age was 20 years and 70.46% were children. Cyst rupture was reported in 12.96% and recurrence of CCE after treatment in 9.61% of cases. Permanent disability was reported in 7.86% of cases, while death occurred in 6.21%. In case series reporting all CE localization, CCE represented 1.5% of all CE cases. In the few reports that identified at molecular level the CCE cyst, E. granulosus s.s. was found in 40% and E. canadensis in 60% of cases.

CONCLUSIONS

We report a rare case of CCE and evidenced the probable local origin of infection. The proportions of CE cases with uncommon localizations and with high impact on patients' lives have been globally neglected and should be included in the computation of the global burden of CE.

Pulmonary complications of cystic echinococcosis in children in Uruguay

Cystic echinococcal lesions surgically removed from 99 patients aged 1-15 years in Uruguay were histopathologically studied. The lesions were collected from the lungs, liver, peritoneum, omentum, pleura, ovary, appendix and perinephrium. All intact cysts were well-developed and unilocular. Pulmonary and hepatic fertile cysts in which protoscoleces were produced were in 75% and 47%, respectively, of all patients. Fertile cysts having many protoscoleces were in the lungs of a 1-year-old infant. Sixteen ruptured pulmonary cysts were found in the lungs of 13 patients and four ruptured hepatic cysts were found in the liver of three patients. Pulmonary complications were seen in patients having pulmonary echinococcal cysts. In lung tissue surrounding echinococcal cysts, pulmonary complications included chronic congestion, hemorrhage, bronchopneumonia, as well as interstitial pneumonia that included histological changes caused by bronchiolitis, organizing pneumonia and obstructive pneumonia. Liver tissue adjacent to echinococcal cysts showed atrophy of hepatic cells, proliferation of interstices, small focal hemorrhages, and infiltration of mononuclear cells. The present study shows that a close relationship exists between pulmonary echinococcosis and pneumonia. The term 'echinococcal pneumonia' is proposed for pneumonia accompanying pulmonary echinococcosis.

[Surgery for pulmonary hydatid cyst in Mali]

INTRODUCTION

The pulmonary hydatid disease has not been the subject of many studies in Mali.

OBJECTIVE

List the cases hydatid cyst of the lung operated on in Mali, in order to analyze their surgical aspects.

METHODS AND PATIENTS

This is a retrospective study of consecutive and non-selected cases. From 1960 to 2000, eleven cases of the pulmonary hydatid disease were operated on in Mali. The earliest case dates back to 1968 and the most recent was in 2000. All of these patients were taken care of at the "Point G Hospital" in Bamako.

RESULTS

Patients were aged between 4 and 42 years, with an estimated average at 20. The gender ratio (F/M) was 1.75. The circumstance leading to the discovery stems from 8 cases of cough. Seven patients had at least a sign of complicated cyst. Out of a total of 12 cysts, 9 were located to the right lung. The treatment of the cyst consisted in a kystectomy accompanied by an atypical resection of the parenchyma on 6 patients and a typical resection of the attacked lobe on 5 others. The operating effects were complicated in 5 cases. No mortality was reported. Anatomopathology confirmed pulmonary hydatidosis in all cases.

CONCLUSION

Paradoxically, the frequency of pulmonary hydatidosis is low in Mali. Patients were consulted late. This explains in part the high level of lobectomy during surgical treatment.

Exotic pulmonary infections

Pulmonary infections are the commonest type of illnesses seen in everyday practice. Although most infections are caused by a few familiar pathogens, an increase in global travel has led to the occurrence of rare and exotic diseases that often do not manifest until after the traveller returns home. Previously innocuous organisms may also be the cause of exotic infections in patients undergoing transplantation, or very aggressive immunosupression. Such treatment regimes may reactivate quiescent organisms acquired years previously, for example melioidosis and strongyloides stercoralis. In most developed countries there is also an increasing incidence of zoonotic infections, with a number of these presenting with mainly pulmonary symptoms. A carefully taken history of recent travel, exposure to wild or domestic animals or the presence of immunosuppression, is extremely helpful in identifying problematic infections that fall into the realm of the exotic. This review discusses some of the respiratory infections in each of these groups with an emphasis on imported infections.

Chest pain in pediatrics

Chest pain in the pediatric population is a common and mostly benign occurrence. A thorough history and physical examination are usually all that are necessary in excluding the rare, life-threatening causes of chest pain. These rare, life-threatening events require immediate evaluation, treatment, and subspecialty consultation. Idiopathic chest pain is the most common diagnosis, and the symptoms are typically chronic. laboratory testing is usually nondiagnostic, costly, and burdensome to patients and therefore unnecessary. A long-term, trusting relationship with the patients and their families is needed to reassure them and allow symptoms to resolve.