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Healy O, O'Callaghan M, Deegan A, McCarthy C. Diffuse pulmonary meningotheliomatosis: a rare cause of multiple pulmonary nodules. BMJ Case Rep 2023; 16:e254039. [PMID: 37788915 PMCID: PMC10551992 DOI: 10.1136/bcr-2022-254039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023] Open
Abstract
This case describes a woman in her 50s who presented with recurrent lower respiratory tract infections. She was an ex-smoker and had worked on a livestock farm for many years. Chest radiograph and CT of the chest revealed multiple bilateral pulmonary nodules. Bronchoalveolar lavage and transbronchial biopsy did not confirm a unifying diagnosis and thus, surgical biopsy was pursued. Video-assisted thoracoscopic surgical guided biopsy of the right upper, middle and lower lobes demonstrated intraparenchymal minute nodules, consisting of bland epithelioid cells without any evidence of malignancy. The nodules stained positive for neural cell adhesion molecule (CD56) and progesterone receptor with weakly positive epithelial membrane antigen and smooth muscle actin. The combination of this characteristic staining pattern, the diffuse subcentimetre nature of the nodules and this clinical presentation fit with a diagnosis of the ultra-rare pulmonary disease, diffuse pulmonary meningotheliomatosis (DPM). This case highlights a rare cause of bilateral diffuse pulmonary nodules and thus, the breadth of differential diagnoses that need to be considered when approaching such a finding. Careful history-taking and thorough workup is often needed, typically requiring input from multiple specialties. DPM, while rare, should not be overlooked when considering the underlying cause of this presentation, especially in female patients. This case reiterates how common clinical presentations can unveil rare conditions and the contributions of physicians, pathologists and radiologists in the diagnosis and management of these complex diseases.
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Affiliation(s)
- Orla Healy
- Department of Respiratory Medicine, St Vincent's University Hospital, Dublin, Ireland
| | - Marissa O'Callaghan
- Department of Respiratory Medicine, St Vincent's University Hospital, Dublin, Ireland
- School of Medicine, University College Dublin, Belfield Campus, Dublin 4, Ireland
| | - Alex Deegan
- Department of Respiratory Medicine, St Michael's Hospital, Dublin East Hospitals Group, Dun Laoghaire, Dublin, Ireland
| | - Cormac McCarthy
- Department of Respiratory Medicine, St Vincent's University Hospital, Dublin, Ireland
- School of Medicine, University College Dublin, Belfield Campus, Dublin 4, Ireland
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2
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Cain SA, Pope B, Mangiola S, Mantamadiotis T, Drummond KJ. Somatic mutation landscape in a cohort of meningiomas that have undergone grade progression. BMC Cancer 2023; 23:216. [PMID: 36882706 PMCID: PMC9990218 DOI: 10.1186/s12885-023-10624-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 02/09/2023] [Indexed: 03/09/2023] Open
Abstract
BACKGROUND A subset of meningiomas progress in histopathological grade but drivers of progression are poorly understood. We aimed to identify somatic mutations and copy number alterations (CNAs) associated with grade progression in a unique matched tumour dataset. METHODS Utilising a prospective database, we identified 10 patients with meningiomas that had undergone grade progression and for whom matched pre- and post-progression tissue (n = 50 samples) was available for targeted next-generation sequencing. RESULTS Mutations in NF2 were identified in 4/10 patients, of these 94% were non-skull base tumours. In one patient, three different NF2 mutations were identified in four tumours. NF2 mutated tumours showed large-scale CNAs, with highly recurrent losses in 1p, 10, 22q, and frequent CNAs on chromosomes 2, 3 and 4. There was a correlation between grade and CNAs in two patients. Two patients with tumours without detected NF2 mutations showed a combination of loss and high gain on chromosome 17q. Mutations in SETD2, TP53, TERT promoter and NF2 were not uniform across recurrent tumours, however did not correspond with the onset of grade progression. CONCLUSION Meningiomas that progress in grade generally have a mutational profile already detectable in the pre-progressed tumour, suggesting an aggressive phenotype. CNA profiling shows frequent alterations in NF2 mutated tumours compared to non NF2 mutated tumours. The pattern of CNAs may be associated with grade progression in a subset of cases.
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Affiliation(s)
- Sarah A Cain
- Department of Neurosurgery, The Royal Melbourne Hospital, 300 Grattan street, Parkville, VIC, Australia.
| | - Bernard Pope
- Melbourne Bioinformatics, The University of Melbourne, Parkville, Australia.,Department of Surgery (Royal Melbourne Hospital), Melbourne Medical School, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia.,Department of Medicine, Central Clinical School, Faculty of Medicine Nursing and Health Sciences, Monash University, Monash, Australia
| | - Stefano Mangiola
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
| | - Theo Mantamadiotis
- Department of Microbiology & Immunology, The University of Melbourne, Parkville, Australia.,Department of Surgery (Royal Melbourne Hospital), Melbourne Medical School, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Katharine J Drummond
- Department of Neurosurgery, The Royal Melbourne Hospital, 300 Grattan street, Parkville, VIC, Australia.,Department of Surgery (Royal Melbourne Hospital), Melbourne Medical School, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
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3
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Bukovac A, Kafka A, Hrašćan R, Vladušić T, Pećina-Šlaus N. Nucleotide variations of TP53 exon 4 found in intracranial meningioma and in silico prediction of their significance. Mol Clin Oncol 2019; 11:563-572. [PMID: 31692929 PMCID: PMC6826266 DOI: 10.3892/mco.2019.1936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 08/20/2019] [Indexed: 01/28/2023] Open
Abstract
The aim of the present study was to identify TP53 exon 4 mutations in patients with meningioma and to investigate their potential association with specific tumor pathology. Nucleotide alterations were investigated in 48 meningiomas via the direct sequencing of TP53 exon 4 in patient tumor and blood samples using the DNA Sanger method with the BigDyeTerminator v3.1 Cycle Sequencing kit and Applied Biosystems 3730XL apparatus. The results revealed that TP53 exon 4 was frequently altered in meningioma, occurring in 60.4% of the patients investigated. A total of 18 different alterations were detected in the meningioma samples assessed in the current study. The majority of these appeared more than once and some were repeatedly identified in several patients. Changes at codons 72 (c.215G>C) and 62 (c.186delA) were highly prevalent, occurring in 44.8% of patients. Other changes detected via frequency analysis included: Five substitutions on codon 105 (c.315C>T); four insertions on codon 70 (c.209_210insG); three insertions on codon 64 (c.190C>G), 82 (245C>T; 245delC; 243_244insA) and 104 (c.312G>A); and two insertions on codons 108 (c.322G>C), 71 (c.213C>A), 73 (c.217G>A), 91 (c.271T>C) and 100 (c.300G>T). Codons 68 (c.202_203insT), 77 (c.229C>T), 88 (c.263C>G) and 92 (c.276C>A) were altered once. Alterations on codons 82, 91, 108, 104, 105, 70 and 92 were characterized as possibly damaging by PolyPhen-2 and Mutation Taster2 tools. The current study also demonstrated that nucleotide alterations were significantly associated with the loss of p53 expression (P=0.04) and female patients (P=0.049), particularly codon 72. The results present novel data on the mutational spectrum of TP53 in meningeal brain tumors.
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Affiliation(s)
- Anja Bukovac
- Laboratory of Neurooncology, Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia.,Department of Biology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Anja Kafka
- Laboratory of Neurooncology, Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia.,Department of Biology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Reno Hrašćan
- Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia
| | - Tomislav Vladušić
- Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia
| | - Nives Pećina-Šlaus
- Laboratory of Neurooncology, Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia.,Department of Biology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
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4
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Uno M, Oba-Shinjo SM, Wakamatsu A, Huang N, Ferreira Alves VA, Rosemberg S, de Aguiar P, Leite C, Miura F, Marino RJ, Scaff M, Nagahashi-Marie SK. Association of TP53 Mutation, p53 Overexpression, and p53 Codon 72 Polymorphism with Susceptibility to Apoptosis in Adult Patients with Diffuse Astrocytomas. Int J Biol Markers 2018; 21:50-7. [PMID: 16711514 DOI: 10.1177/172460080602100108] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Clarification of TP53 alterations is important to understand the mechanisms underlying the development of diffuse astrocytomas. It has been suggested that the alleles of TP53 at codon 72 differ in their ability to induce apoptosis in human cancers. The aim of this study was to analyze the possible association of TP53 mutation, p53 overexpression, and p53 codon 72 polymorphism with susceptibility to apoptosis in adult Brazilian patients with diffuse astrocytomas. We analyzed 56 surgical specimens of diffuse astrocytomas for alterations of TP53, using polymerase chain reaction single-strand conformation polymorphism (PCR-SSCP) direct sequencing. p53 and cleaved caspase 3 protein expression were assessed by immunohistochemistry. We found TP53 mutations in 19.6% (11 out of 56) of tumors tested, with the lowest mutation rate found in the cases of glioblastomas (8.8%) (p = 0.03). Only 16.1% of tumors tested showed cleaved caspase 3-positive staining, demonstrating that apoptosis is very inhibited in these tumors. All tumors having TP53 mutation and p53 accumulation had no expression of cleaved caspase 3. Additionally, no association was observed in tumors having proline and arginine alleles and expression of cleaved caspase 3. We concluded that clarification of the TP53 alterations allows a better understanding of the mechanisms involved in the progression of diffuse astrocytomas, and the allele status at codon 72 was not associated with apoptosis in these tumors.
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Affiliation(s)
- M Uno
- Department of Neurology, School of Medicine, University of São Paulo, São Paulo, Brazil.
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5
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Trott G, Pereira-Lima JFS, Leães CGS, Ferreira NP, Barbosa-Coutinho LM, Oliveira MC. Abundant immunohistochemical expression of dopamine D2 receptor and p53 protein in meningiomas: follow-up, relation to gender, age, tumor grade, and recurrence. ACTA ACUST UNITED AC 2015; 48:415-9. [PMID: 25742638 PMCID: PMC4445664 DOI: 10.1590/1414-431x20144163] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Accepted: 11/26/2014] [Indexed: 11/22/2022]
Abstract
Meningiomas are common, usually benign tumors, with a high postoperative recurrence
rate. However, the genesis and development of these tumors remain controversial. We
aimed to investigate the presence and implications of a mutated p53 protein and
dopamine D2 receptor in a representative series of meningiomas and to
correlate these findings with age, gender, tumor grade, and recurrence. Tumor tissue
samples of 157 patients diagnosed with meningioma (37 males and 120 females, mean age
53.6±14.3 years) who underwent surgical resection between 2003 and 2012 at our
institution were immunohistochemically evaluated for the presence of p53 protein and
dopamine D2 receptor and were followed-up to analyze tumor recurrence or
regrowth. Tumors were classified as grades I (n=141, 89.8%), II (n=13, 8.3%), or
grade III (n=3, 1.9%). Dopamine D2 receptor and p53 protein expression
were positive in 93.6% and 49.7% of the cases, respectively. Neither of the markers
showed significant expression differences among different tumor grades or recurrence
or regrowth statuses. Our findings highlight the potential role of p53 protein in
meningioma development and/or progression. The high positivity of dopamine
D2 receptor observed in this study warrants further investigation of
the therapeutic potential of dopamine agonists in the evolution of meningiomas.
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Affiliation(s)
- G Trott
- Programa de Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - J F S Pereira-Lima
- Programa de Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - C G S Leães
- Programa de Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - N P Ferreira
- Centro de Neuroendocrinologia, Complexo Hospitalar Santa Casa de Porto Alegre, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - L M Barbosa-Coutinho
- Programa de Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
| | - M C Oliveira
- Programa de Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil
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6
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Menghi F, Orzan FN, Eoli M, Farinotti M, Maderna E, Pisati F, Bianchessi D, Valletta L, Lodrini S, Galli G, Anghileri E, Pellegatta S, Pollo B, Finocchiaro G. DNA microarray analysis identifies CKS2 and LEPR as potential markers of meningioma recurrence. Oncologist 2011; 16:1440-50. [PMID: 21948653 DOI: 10.1634/theoncologist.2010-0249] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Meningiomas are the most frequent intracranial tumors. Surgery can be curative, but recurrences are possible. We performed gene expression analyses and loss of heterozygosity (LOH) studies looking for new markers predicting the recurrence risk. We analyzed expression profiles of 23 meningiomas (10 grade I, 10 grade II, and 3 grade III) and validated the data using quantitative polymerase chain reaction (qPCR). We performed LOH analysis on 40 meningiomas, investigating chromosomal regions on 1p, 9p, 10q, 14q, and 22q. We found 233 and 268 probe sets to be significantly down- and upregulated, respectively, in grade II or III meningiomas. Genes downregulated in high-grade meningiomas were overrepresented on chromosomes 1, 6, 9, 10, and 14. Based on functional enrichment analysis, we selected LIM domain and actin binding 1 (LIMA1), tissue inhibitor of metalloproteinases 3 (TIMP3), cyclin-dependent kinases regulatory subunit 2 (CKS2), leptin receptor (LEPR), and baculoviral inhibitor of apoptosis repeat-containing 5 (BIRC5) for validation using qPCR and confirmed their differential expression in the two groups of tumors. We calculated ΔCt values of CKS2 and LEPR and found that their differential expression (C-L index) was significantly higher in grade I than in grade II or III meningiomas (p < .0001). Interestingly, the C-L index of nine grade I meningiomas from patients who relapsed in <5 years was significantly lower than in grade I meningiomas from patients who did not relapse. These findings indicate that the C-L index may be relevant to define the progression risk in meningioma patients, helping guide their clinical management. A prospective analysis on a larger number of cases is warranted.
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Affiliation(s)
- Francesca Menghi
- Unit of Molecular Neuro-Oncology, Fondazione Istituto Neurologico Besta, Milan, Italy
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7
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Claus EB, Park PJ, Carroll R, Chan J, Black PM. Specific genes expressed in association with progesterone receptors in meningioma. Cancer Res 2008; 68:314-22. [PMID: 18172325 PMCID: PMC3256746 DOI: 10.1158/0008-5472.can-07-1796] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An association between hormones and meningioma has been postulated. No data exist that examine gene expression in meningioma by hormone receptor status. The data are surgical specimens from 31 meningioma patients undergoing neurosurgical resection at Brigham and Women's Hospital from March 15, 2004 to May 10, 2005. Progesterone and estrogen hormone receptors (PR and ER, respectively) were measured via immunohistochemistry and compared with gene expression profiling results. The sample is 77% female with a mean age of 55.7 years. Eighty percent were grade 1 and the mean MIB was 6.2, whereas 33% and 84% were ER+ and PR+, respectively. Gene expression seemed more strongly associated with PR status than with ER status. Genes on the long arm of chromosome 22 and near the neurofibromatosis type 2 (NF2) gene (22q12) were most frequently noted to have expression variation, with significant up-regulation in PR+ versus PR- lesions, suggesting a higher rate of 22q loss in PR- lesions. Pathway analyses indicated that genes in collagen and extracellular matrix pathways were most likely to be differentially expressed by PR status. These data, although preliminary, are the first to examine gene expression for meningioma cases by hormone receptor status and indicate a stronger association with PR than with ER status. PR status is related to the expression of genes near the NF2 gene, mutations in which have been identified as the initial event in many meningiomas. These findings suggest that PR status may be a clinical marker for genetic subgroups of meningioma and warrant further examination in a larger data set.
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Affiliation(s)
- Elizabeth B Claus
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts, USA.
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Sayagués JM, Tabernero MD, Maíllo A. [Cytogenetic alterations in meningioma tumors and their impact on disease outcome]. Med Clin (Barc) 2007; 128:226-32. [PMID: 17335728 DOI: 10.1016/s0025-7753(07)72543-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In recent years important advances have been achieved in the understanding of the genetic abnormalities present in meningioma tumors and its association with the ontogeny and progression of these tumor. Accordingly, while the presence of monosomy 22/22q-, associated with mutation of the NF2, BAM22, RRP22, GAR22, MN1, SMARCB1, CLH22 and/or LARGE genes, is associated with neoplasic transformation, other alterations such us monosomy 14, del(1p), different chromosomal abnormalities localized at 9p, 10q and 17q and complex karyotypes are frequently related to tumor progression. From the clinical point of view, currently available information about the impact of the different cytogenetic abnormalities on disease behavior and patient outcome is still scanty; nevertheless, the presence of gains of chromosome 22 in the context of a hyperdiploid karyotype, as well as del(1p) and monosomy 14 have been associated with a statistically significantly shorter recurrence-free survival, this later abnormality showing an independent prognostic value.
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Affiliation(s)
- José María Sayagués
- Servicio General de Citometría, Departamento de Medicina y Centro de Investigación del Cáncer, Universidad de Salamanca, Salamanca, España.
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Al-Khalaf HH, Lach B, Allam A, AlKhani A, Alrokayan SA, Aboussekhra A. The p53/p21 DNA damage-signaling pathway is defective in most meningioma cells. J Neurooncol 2007; 83:9-15. [PMID: 17245624 DOI: 10.1007/s11060-006-9301-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2006] [Accepted: 11/14/2006] [Indexed: 11/26/2022]
Abstract
Although meningiomas represent the most common class of tumors of the central nervous system, the molecular events underlying their genesis and development are still not well defined. In the present study we have used the immuno-blotting technique to study the expression level of the tumor suppressor proteins p53, p21 and PTEN in primary meningioma cells. We have also studied the induction of p21 and p53 in response to both UV light and gamma-rays. We present evidence that the p53/p21-dependent gamma-ray signaling pathway is defective in 5 out of 8 (62%) of these cells. Furthermore, we have shown that the tumor suppressor p21, p53 and PTEN proteins are differently expressed in these cells, with up to 40-folds difference between the lowest and the highest levels of each protein. These results suggest that the tumor suppressors p53/p21 signaling pathway and PTEN play important roles in the development of benign meningiomas.
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Affiliation(s)
- Huda H Al-Khalaf
- Department of Biological and Medical Research, King Faisal Specialist Hospital and Research Center, MBC# 03-66, 3354, Riyadh 11211, KSA
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Rohini K, Mathivanan J, Prabhu PDAH, Subbakrishna DK, Gope ML, Chandramouli BA, Sampath S, Anandh B, Gope R. Loss of heterozygosity of the p53 gene and deregulated expression of its mRNA and protein in human brain tumors. Mol Cell Biochem 2006; 300:101-11. [PMID: 17180249 DOI: 10.1007/s11010-006-9374-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Accepted: 11/06/2006] [Indexed: 01/26/2023]
Abstract
Tumor-specific alterations at the p53 gene locus were analyzed in 40 human brain tumor samples. Gliomas were more prevalent in young males and meningiomas in old females. Structural changes at the intron 1 region of the p53 gene were analyzed in these tumors by Southern blotting. Among the 40 tumors, 33 were informative and 21 of these (63.6%) informative cases showed loss of heterozygosity (LOH). This is the first report showing LOH at the intron 1 region of p53 gene in human brain tumors. The level of p53 mRNA, p53 protein and Ser 392 phosphorylated p53 protein were also analyzed in all tumor samples. Normal sized p53 mRNA and protein were present in all the tumor samples; however, their levels were 1.5- to 4-fold higher compared to the control suggesting deregulated p53 pathway in these tumors. No correlation was found between LOH status and the levels of p53 mRNA and protein. In all high-grade glioblastomas majority of the p53 protein existed as Ser 392 phosphorylated form as compared to low-grade gliomas. In addition, the percentage of Ser 392 phosphorylated form of p53 protein was lower in meningiomas and other brain tumor types irrespective of tumor grade. These results suggest involvement of Ser 392 phosphorylated form of p53 protein during the later stages of glioma development. These results also indicate that deregulation of p53 gene could occur at various steps in p53 pathway and suggest an overall deregulation of p53 gene in most brain tumor types.
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Affiliation(s)
- K Rohini
- Department of Human Genetics, National Institute of Mental Health and Neuro Sciences, Bangalore 560 029, India
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11
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Rieske P, Zakrzewska M, Biernat W, Bartkowiak J, Zimmermann A, Liberski PP. Atypical molecular background of glioblastoma and meningioma developed in a patient with Li?Fraumeni syndrome. J Neurooncol 2005; 71:27-30. [PMID: 15719270 DOI: 10.1007/s11060-004-9181-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We observed three neoplasms with completely different histologies: malignant fibrous histiocytoma (MFH), atypical meningioma (AM), and glioblastoma (GB), developing in a patient with Li-Fraumeni syndrome. By using a combined molecular approach we performed molecular characterization of all three tumours. Data obtained showed an interesting molecular background of the AM and GB. AM showed TP53mutations and a 22q loss of heterozygosity (LOH). GB showed epidermal growth factor receptor (EGFR) amplification and TP53 mutations, whereas P16, PTEN, Rbwere intact in terms of LOH and/or multiplex PCR (polymerase chain reaction) analysis. Additionally, GB has a 1q LOH, which is an extremely rare alteration in glioblastomas. Identical 1q LOH was also observed in MFH.
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Affiliation(s)
- Piotr Rieske
- Department of Molecular Pathology and Neurology, Chair of Oncology, Medical University of Lodz, Lodz, Poland
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12
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Ionescu DN, Sasatomi E, Aldeeb D, Omalu BI, Finkelstein SD, Swalsky PA, Yousem SA. Pulmonary Meningothelial-like Nodules. Am J Surg Pathol 2004; 28:207-14. [PMID: 15043310 DOI: 10.1097/00000478-200402000-00008] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Minute pulmonary meningothelial-like nodules (MPMNs) are incidental interstitial pulmonary nodules. They share histologic, ultrastructural, and immunohistochemical features with meningiomas (MGs). DESIGN Sixteen cases yielding 33 separate MPMNs and 10 cases of benign MG were studied. Immunohistochemical studies and mutational analyses were performed on microdissected tissue using 20 polymorphic microsatellite markers targeting 11 genomic regions in an effort to identify genetic similarities of MPMN and MG. RESULTS A total of 96.6% of MPMNs stained positive for vimentin, 33.3% for epithelial membrane antigen, 3% for S-100, and all were negative for cytokeratin and synaptophysin. Loss of heterozygosity (LOH) was identified in 25% of single MPMN affecting 3 genomic loci. No solitary MPMN had more than 1 LOH event. Multiple LOHs were seen only in MPMN-omatosis syndrome, where 33.3% of MPMNs showed LOH affecting 7 genomic loci. MG showed the highest frequency of LOH with major events seen at 22q (60%), 14q (42.8%), and 1p (44.4%) that were not shared by MPMN. CONCLUSION Isolated MPMN lacks mutational damage, consistent with a reactive origin. MPMN-omatosis syndrome might represent the transition between a reactive and neoplastic proliferation. MPMNs are different from MG based on the major molecular genetic events seen in their formation and progression.
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Affiliation(s)
- Diana N Ionescu
- Department of Pathology, Division of Anatomic Pathology, University of Pittsburgh Medical Center, Presbyterian University Hospital, Room A610, 200 Lothrop St., Pittsburgh, PA 15213, USA.
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