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Mesothelioma of childhood
A E Fraire1, S Cooper, S D Greenberg
1Department of Pathology, Baylor College of Medicine, Houston, TX 77030.
Abstract:
Malignant mesothelioma (MM) of childhood is a rare but important neoplasm. Eighty children with a previous diagnosis of MM were identified. Four of the 80 children had exposure to known risk factors (two had history of exposure to asbestos, one had received radiation therapy, and one had been exposed in utero to isoniazid). Tissue slides were available for independent and joint review by a panel of three pathologists in 22 of the cases. Ten were accepted as MM, nine were reclassified as other malignancies, and three were considered tumors of uncertain nature. Six of the ten children with MM were boys, and four were girls. Eight had pleural tumors, and two had peritoneal tumors. Four died at 7, 8, 18, and 48 months after diagnosis; three remained alive at 19, 20, and 59 months; and three had no follow-up. This review suggests that MM of childhood is a valid entity with a grave prognosis. The tissue diagnosis is difficult and is best made by a panel of pathologists. The available evidence does not support a causal relationship between MM and asbestos, radiation, or isoniazid.
Insights
Childhood malignant mesothelioma (MM) is a rare cancer. Diagnosis is challenging, but MM in children is a distinct entity with a poor prognosis, and evidence does not link it to asbestos, radiation, or isoniazid.
Area of Science:
- Pediatric Oncology
- Pathology
- Epidemiology
Background:
- Malignant mesothelioma (MM) in children is a rare but significant neoplasm.
- Understanding its characteristics and diagnostic challenges is crucial for patient outcomes.
Purpose of the Study:
- To review cases of childhood malignant mesothelioma.
- To assess diagnostic accuracy and identify potential risk factors.
- To evaluate the prognosis of pediatric MM.
Main Methods:
- Retrospective review of 80 children with a previous MM diagnosis.
- Independent and joint review of tissue slides by a panel of three pathologists for 22 cases.
- Analysis of patient demographics, tumor characteristics, risk factors, and follow-up data.
Main Results:
- Of 22 reviewed cases, 10 were confirmed as MM, 9 reclassified, and 3 deemed uncertain.
- Six of the confirmed MM cases were in boys and four in girls.
- Eight pleural and two peritoneal tumors were identified; prognosis was generally grave, with mortality in four patients within 48 months.
- Limited evidence supported a causal link to asbestos, radiation, or in utero isoniazid exposure.
Conclusions:
- Childhood malignant mesothelioma is a valid clinicopathological entity.
- Accurate diagnosis is challenging and best achieved by a panel of expert pathologists.
- The prognosis for pediatric MM is poor, and current evidence does not establish causal relationships with common risk factors.