Publications by authors named "Itsuki Kajimura"

Background: Androgen-producing granulosa cell tumor in adolescent girl is rare condition and clinical characteristics are not fully elucidated.

Case Presentation: Seventeen years old girl complained of secondary amenorrhea was referred to our out-patient consultation. Markedly elevated serum testosterone, LH, and AMH levels were noted.

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We report a case of dysgerminoma in a 22-year-old woman diagnosed with chromosomal abnormality, balanced translocation 46X,t(X:1)(q22;q21). She had received hormone replacement therapy for 7 years for primary amenorrhea. She visited a primary care physician because of lower abdominal distension, and a large tumor in the pelvis was discovered.

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Article Synopsis
  • Ovarian tissue cryopreservation and auto-transplantation show promise for preserving fertility, but the limited longevity of grafted tissue is a concern due to insufficient understanding of follicle reduction mechanisms.
  • The study involved cryopreserving human ovarian tissue using vitrification, grafting it to nude mice, and examining tissue changes after 12 weeks, focusing on follicle presence, fibrosis, and other histological characteristics.
  • Findings indicated increased fibrosis, reduced normal ovarian cortex, and activation of dormant follicles post-grafting, suggesting that these changes may explain the tissue's short lifespan and that aSMA expression can serve as a marker for healthy ovarian stroma.
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As its name indicates, anti-Müllerian hormone (AMH) is primarily found as an inhibitor of the Müllerian duct in male fetus. On the other hand, AMH may act as a mediator of Müllerian duct-derived female tissue, such as endometrium in normal and pathological conditions. However, the role of AMH in the functional regulations of endometriosis is not well understood.

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Aims: Genomic instability has been indicated during the dedifferentiation process from leiomyoma (LM) to leiomyosarcoma (LMS). Previously, we have described that nuclear expression pattern of DNA damage response protein p53-binding protein 1 (53BP1), detected by immunofluorescence, reflects the magnitude of genomic instability during malignancy. Here, we present a case of LMS arising from LM with molecular analysis of 53BP1, which showed transitional magnitude of DNA damage response within a tumor.

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