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Pleuropulmonary blastoma: a marker for familial disease
J R Priest1, J Watterson, L Strong
1Department of Hematology/Oncology, Children's Health Care, St. Paul, Minnesota 55102, USA.
Insights
Pleuropulmonary blastoma (PPB) in children may indicate a heritable cancer predisposition in about 25% of cases. Families of PPB patients require thorough investigation for associated genetic syndromes.
Area of Science:
- Pediatric Oncology
- Cancer Genetics
- Medical Genetics
Background:
- Pleuropulmonary blastoma (PPB) is a rare pediatric tumor.
- Understanding familial disease patterns is crucial for early diagnosis and management.
Observation:
- A study of 45 children with PPB identified associations with other conditions in 12 patients and their relatives.
- Associated conditions include various cancers, cysts, and dysplasias, such as Wilms tumor, sarcomas, and leukemia.
Findings:
- Approximately 25% of PPB cases suggest a constitutional, heritable predisposition to other neoplastic or dysplastic diseases.
- Preliminary genetic analysis did not reveal abnormalities in p53, WT1, or WT2 in the studied cases.
Implications:
- PPB may be part of a novel familial cancer syndrome.
- Careful investigation of PPB patients and their families is recommended.
- Further research into the genetic basis of these associated diseases is warranted.
Objective:
To catalog and evaluate patterns of disease in families of children with pleuropulmonary blastoma (PPB).
Methods:
Data have been collected since 1988 on 45 children with PPB and their families. All pathologic materials were centrally reviewed. Preliminary molecular genetic analyses were performed when possible.
Results:
In 12 of 45 patients, an association was found between PPB and other dysplasias, neoplasias, or malignancies in the patients with or in their young relatives. The diseases found to be associated with PPB include other cases of PPB, pulmonary cysts, cystic nephromas, sarcomas, medulloblastomas, thyroid dysplasias and neoplasias, malignant germ cell tumors, Hodgkin disease, leukemia, and Langerhans cell histiocytosis. Abnormalities of the p53 tumor suppressor gene, Wilms tumor suppressor gene (WT1), and the putative second genetic locus for Wilms tumor (WT2) were not found in preliminary investigations.
Conclusions:
The occurrence of PPB appears to herald a constitutional and heritable predisposition to dysplastic or neoplastic disease in approximately 25% of cases. All patients with PPB and their families should be investigated carefully. Further research of this new family cancer syndrome may provide insight into the genetic basis of these diseases.