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Itami H, Fujii T, Nakai T, Takeda M, Kishi Y, Taniguchi F, Terada C, Okada F, Nitta Y, Matsuoka M, Sasaki S, Sugimoto S, Uchiyama T, Morita K, Kasai T, Kawaguchi R, Ohbayashi C. TRAF7 mutations and immunohistochemical study of uterine adenomatoid tumor compared with malignant mesothelioma. Hum Pathol 2021; 111:59-66. [PMID: 33667423 DOI: 10.1016/j.humpath.2021.02.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 12/12/2022]
Abstract
Adenomatoid tumors (ATs) are benign mesothelial tumors with a good prognosis and usually occur in female and male genital tracts, including in the uterus. ATs are genetically defined by tumor necrosis factor receptor-associated factor (TRAF) 7 mutations, and a high number of AT cases show immunosuppression. On the other hand, malignant mesotheliomas (MMs) are malignant mesothelial tumors with a very poor prognosis. Genetic alterations in TRAF, methylthioadenosine phosphorylase(MTAP), and BRCA-associated nuclear protein 1 (BAP1) in ATs derived from the uterus and MMs of pleural or peritoneal origin were compared by gene sequence analysis or immunohistochemical approaches. Formalin-fixed paraffin-embedded tissues derived from patients were used for immunohistochemical staining of L1 cell adhesion molecule (L1CAM), BAP1, MTAP, and sialylated protein HEG homolog 1 (HEG1) in 51 uterine AT cases and 34 pleural or peritoneal MM cases and for next-generation sequencing of the TRAF7 gene in 44 AT cases and 21 MM cases. ATs had a significantly higher rate of L1CAM expression than MMs, whereas MMs had a significantly higher rate of loss of MTAP and BAP1 expression than ATs. There was no difference in the rate of HEG1 expression between the tumor types. Most of the ATs (37/44; 84%) had somatic mutations in TRAF7, but none of the MMs had somatic mutations in TRAF7 (0/21; 0%). In addition, a low number of AT cases were associated with a history of immunosuppression (9/51; 17.6%). TRAF7 mutation is one of the major factors distinguishing the development of AT from MM, and immunosuppression might not be associated with most AT cases.
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Affiliation(s)
- Hiroe Itami
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan.
| | - Tomomi Fujii
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Tokiko Nakai
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Maiko Takeda
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan; Department of Laboratory Medicine and Pathology, National Hospital Organization Kinki-chuo Chest Medical Center, Sakai, Japan
| | - Yohei Kishi
- Department of Obstetrics and Gynecology, Takanohara Central Hospital, Nara, Japan
| | - Fumiaki Taniguchi
- Department of Obstetrics and Gynecology, Takanohara Central Hospital, Nara, Japan
| | - Chiyoko Terada
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Fumi Okada
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Yuji Nitta
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Minami Matsuoka
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Shoh Sasaki
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Sumire Sugimoto
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Tomoko Uchiyama
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Kohei Morita
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Takahiko Kasai
- Department of Laboratory Medicine and Pathology, National Hospital Organization Kinki-chuo Chest Medical Center, Sakai, Japan
| | - Ryuji Kawaguchi
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Japan
| | - Chiho Ohbayashi
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
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