Abstract：
:Pulmonary inflammatory pseudotumors (IP) are rare mesenchymal proliferations that have a polymorphic histology and an unpredictable biologic behavior. The histologic spectrum of IP has led to uncertainty as to whether this tumor has a reactive or neoplastic pathogenesis. Reports of extrapulmonary IP have identified clonal chromosomal aberrations involving 2p23 in the region of the ALK gene. Using fluorescence in situ hybridization with a probe flanking the ALK gene at 2p23 and immunostaining for the ALK gene product, we studied formalin-fixed, paraffin-embedded tissues of pulmonary IP and found a subset (33%) with 2p23 aberrations. We suggest that chromosomal rearrangements and ALK immunostaining may be helpful in the diagnosis of a group of pulmonary IP and should be investigated as a potential tool for predicting their future biologic behavior. An association with anaplastic large-cell lymphoma was also observed. HUM PATHOL 32:428-433.
journal_name
Hum Patholjournal_title
Human pathologyauthors
Yousem SA,Shaw H,Cieply Kdoi
10.1053/hupa.2001.23523subject
Has Abstractpub_date
2001-04-01 00:00:00pages
428-33issue
4eissn
0046-8177issn
1532-8392pii
S0046-8177(01)18497-2journal_volume
32pub_type
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