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Abdulfatah E, Brown NA, Davenport MS, Reichert ZR, Camelo-Piragua S, Heider A, Huang T, Vaishampayan UN, Skala SL, Montgomery JS, Chinnaiyan AM, Kaffenberger SD, Bawa P, Shao L, Mehra R. Extragonadal germ cell tumors: A clinicopathologic study with emphasis on molecular features, clinical outcomes and associated secondary malignancies. Hum Pathol 2024; 148:41-50. [PMID: 38697270 DOI: 10.1016/j.humpath.2024.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/25/2024] [Accepted: 04/25/2024] [Indexed: 05/04/2024]
Abstract
Extragonadal germ cell tumors (EGCTs) are rare, representing <5% of all germ cell tumors (GCTs). Whilst EGCTs share morphological and immunohistochemical features with their gonadal counterparts, they tend to be more aggressive and are frequently associated with secondary somatic malignancies. The aim of our study was to evaluate the clinical, morphological and immunohistochemical features, and to analyze tumors for chromosomal abnormalities of 12p, in addition to any novel genetic alterations, in a series of EGCTs. Seventy-seven EGCTs were included. Anterior mediastinum was the most common anatomic site, followed by central nervous system, retroperitoneum, sacroccygeal area, and neck. Whole genome SNP array identified isochromosome 12p in 26% of tumors. Additional cytogenetic abnormalities included the presence of gain of chr 21 in 37% of tumors. Somatic-type malignancies were identified in 8% of patients. Disease progression (metastasis and/or recurrence) was documented in 8 patients, most of whom died from their relapse. Three patients who died of disease had somatic-type malignancies. Mediastinal seminomas had a significantly better overall survival when compared to mediastinal non-seminomatous GCTs. Our study demonstrates that EGCTs share similar histologic features, but diverse clinical outcomes compared to their gonadal counterparts. Outcomes vary according to anatomic location and histologic subtypes. Our data corroborate that somatic-type malignancies are frequently encountered in mediastinal EGCTs and that their presence portends a poorer prognosis.
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MESH Headings
- Humans
- Neoplasms, Germ Cell and Embryonal/pathology
- Neoplasms, Germ Cell and Embryonal/genetics
- Male
- Adult
- Female
- Young Adult
- Adolescent
- Middle Aged
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/analysis
- Child
- Neoplasms, Second Primary/pathology
- Neoplasms, Second Primary/genetics
- Mediastinal Neoplasms/pathology
- Mediastinal Neoplasms/genetics
- Mediastinal Neoplasms/mortality
- Immunohistochemistry
- Chromosomes, Human, Pair 12/genetics
- Aged
- Neoplasm Recurrence, Local/pathology
- Disease Progression
- Polymorphism, Single Nucleotide
- Chromosome Aberrations
- Genetic Predisposition to Disease
- Testicular Neoplasms
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Affiliation(s)
- Eman Abdulfatah
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Noah A Brown
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Matthew S Davenport
- Department of Radiology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Zachery R Reichert
- Department of Urology, University of Michigan Medical School, Ann Arbor, MI, USA; Rogel Cancer Center, Michigan Medicine, Ann Arbor, MI, USA; Department of Internal Medicine, Divsion of Hematology/ Oncology, MI, USA
| | | | - Amer Heider
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Tao Huang
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Ulka N Vaishampayan
- Rogel Cancer Center, Michigan Medicine, Ann Arbor, MI, USA; Department of Internal Medicine, Divsion of Hematology/ Oncology, MI, USA
| | - Stephanie L Skala
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA; Rogel Cancer Center, Michigan Medicine, Ann Arbor, MI, USA
| | - Jeffrey S Montgomery
- Department of Urology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Arul M Chinnaiyan
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA; Michigan Center for Translational Pathology, Ann Arbor, MI, USA; Rogel Cancer Center, Michigan Medicine, Ann Arbor, MI, USA; Howard Hughes Medical Institute, Ann Arbor, MI, USA
| | | | - Pushpinder Bawa
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA; Michigan Center for Translational Pathology, Ann Arbor, MI, USA
| | - Lina Shao
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Rohit Mehra
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA; Michigan Center for Translational Pathology, Ann Arbor, MI, USA; Rogel Cancer Center, Michigan Medicine, Ann Arbor, MI, USA.
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Fichtner A, Marx A, Ströbel P, Bremmer F. Primary germ cell tumours of the mediastinum: A review with emphasis on diagnostic challenges. Histopathology 2024; 84:216-237. [PMID: 37994540 DOI: 10.1111/his.15090] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 10/12/2023] [Accepted: 10/20/2023] [Indexed: 11/24/2023]
Abstract
This article will review current aspects of the histopathological, immunohistochemical and molecular analysis of primary mediastinal germ cell tumours (PMGCTs) as well as their aetiological, epidemiological, clinical and therapeutic features. PMGCTs represent an important differential diagnosis in the spectrum of mediastinal tumours, and their diagnosis is usually made on small tissue samples from core needle biopsies in combination with diagnostic imaging and serum tumour markers. As in lymphomas, a small biopsy is often the only viable tumour sample available from these patients, as they receive chemotherapy prior to eventual surgical resection. Pathologists therefore need to apply an efficient combination of immunohistochemical markers to confirm the diagnosis of a PMGCT and to exclude morphological mimics.
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Affiliation(s)
- Alexander Fichtner
- Institute of Pathology, University Medical Center Göttingen, Göttingen, Germany
| | - Alexander Marx
- Institute of Pathology, University Medical Center Göttingen, Göttingen, Germany
| | - Philipp Ströbel
- Institute of Pathology, University Medical Center Göttingen, Göttingen, Germany
| | - Felix Bremmer
- Institute of Pathology, University Medical Center Göttingen, Göttingen, Germany
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