Publications by authors named "Junichiro Sato"

Article Synopsis
  • - Chordomas are rare tumors that originate from remnants of the notochord and usually affect the axial skeleton; intrasellar chordomas are particularly uncommon and can mimic pituitary tumors.
  • - An 87-year-old woman experienced acute mental changes and vision loss due to an intrasellar chordoma, leading to cortisol replacement therapy and surgical removal, which revealed characteristic displacement of the pituitary gland and absence of bony structures.
  • - The diagnosis was confirmed through histological examination, and postoperative radiation therapy successfully prevented tumor progression for a year; the case emphasizes the need for neurosurgeons to recognize intrasellar chordomas and consider aggressive treatment strategies.
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Central hypothyroidism and dyslipidemia are well-known adverse events (AEs) of bexarotene therapy. Although hypothyroidism is known to cause dyslipidemia, no study has examined the association between hypothyroidism and dyslipidemia in patients undergoing bexarotene therapy. The aim of this study is to examine this association.

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Article Synopsis
  • Research identifies the colonization of H. fennelliae, a type of enterohepatic Helicobacter, in the large intestine of a specific immunocompromised patient in Japan.
  • * The study used microbiological and histopathological methods to confirm this localization.
  • * This finding helps enhance our understanding of the life cycle of enterohepatic Helicobacter species in humans.
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  • Adrenal infarction is a rare condition where parts of the adrenal glands get damaged, and it's often caused by blood conditions or diseases.
  • An 81-year-old man came to the hospital with severe back pain, and doctors found he had this condition linked to a blood disease called MDS/MPN.
  • This case is special because it's the first time someone has had adrenal infarction twice, and it shows how important it is to investigate the reasons behind these health issues.
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  • The study aimed to evaluate the effectiveness and safety of video-assisted thoracoscopic surgery (VATS) for breast cancer patients with internal mammary lymph node metastases, which are less commonly treated surgically compared to axillary metastases.
  • Researchers analyzed 34 patients with abnormal uptake in lymph nodes using PET/CT, identifying 11 who underwent VATS, with promising results showing no complications and an 80% positive predictive value for cancer detection.
  • During an average follow-up of 17.9 months, most patients remained alive and relapse-free, although two experienced recurrence after surgery, suggesting VATS could be a safe option for treating internal mammary lymph node metastasis.
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  • Invasive lobular carcinoma (ILC) tends to grow in a subtle, single-cell pattern, making it challenging to detect axillary lymph node (ALN) metastases through MRI, especially when compared to invasive ductal carcinoma (IDC).
  • A study analyzed MRI findings in 120 female patients with ILC to identify characteristics correlated with ALN metastasis, revealing that 29% had metastasis.
  • The results indicated that focal cortical thickening (FCT) is possibly the most significant MRI indicator for predicting ALN metastasis in ILC, though further validation of this finding is necessary.
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  • Solitary fibrous tumors (SFT) are rare growths that can form anywhere in the body, but finding one in a man's breast is super uncommon, with only 8 cases known before this one.
  • A 73-year-old man had a noticeable lump in his breast and was diagnosed with SFT after tests showed it had certain characteristics and after a biopsy confirmed it.
  • The doctors successfully removed the tumor, and they used a special test called STAT6 immunostaining to help recognize it, marking this case as the first recorded instance of SFT in a male breast that tested positive for STAT6.
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  • The study evaluates the effectiveness of using combined PET/CT and MRI imaging to detect axillary lymph node metastasis in invasive ductal breast cancer (IDC), aiming to improve preoperative risk assessment for patients.
  • Researchers analyzed data from 361 female patients, creating a prediction model to classify patients into low-risk and high-risk groups regarding ALN macrometastasis.
  • The results showed that the model was effective, with a false-negative rate of 11% and an overall accuracy of 87.5%, suggesting it could help identify low-risk patients before surgery.
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Biased agonism is a frontier field in GPCR research. Acquired hypocalciuric hypercalcemia (AHH) is a rare disease caused by calcium-sensing receptor (CaSR) autoantibodies, to date, showing either simple blocking or biased properties (i.e.

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Context: There are inconsistent results and insufficient evidence as to whether an association exists between the size and aldosterone-producing ability of aldosterone-producing adenomas.

Objective: We further investigated this possible association retrospectively.

Methods: A total of 142 cases of primary aldosteronism diagnosed as unilateral by adrenal venous sampling at 2 referral centers between 2009 and 2019 were included.

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Gastric cancer without infection accounts for less than 1% of all gastric cancers, and is generally considered to be less invasive. This report describes a rare case of -uninfected gastric cancer with deep submucosal invasion and lymph node metastasis. Endoscopic submucosal dissection was performed, and pathological examination revealed tubular adenocarcinoma with deep submucosal invasion.

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Tripartite motif (TRIM) family proteins are involved in various biological processes and the pathophysiology of cancers. However, the roles of TRIM39, a TRIM family member, in breast cancer is not well-understood. Here, we performed immunohistochemical study of TRIM39 protein in clinical estrogen receptor-positive (ER ) breast cancer tissues from 108 patients.

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Background: Solid pseudopapillary neoplasms (SPNs) are rare tumors of the pancreas. Typically, they occur in young females, often have characteristic imaging features, such as cystic components and calcification, and have few effects on the pancreatic duct.

Case Summary: A 31-year-old man was admitted to our hospital with the chief complaint of epigastric pain.

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Article Synopsis
  • - The study investigates the role of Octamer transcription factor 1 (OCT1) in breast cancer, particularly in estrogen receptor (ER)-positive cases, finding that high levels of OCT1 are linked to shorter disease-free survival.
  • - OCT1 knockdown reduces cell growth in MCF-7 breast cancer cells, while overexpression increases proliferation, indicating its significant influence on cancer cell behavior.
  • - The research identifies NCAPH as a new target gene of OCT1, and both OCT1 and NCAPH are associated with poor prognostic outcomes, suggesting they could serve as therapeutic targets for ER-positive breast cancer patients.
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Neuroendocrine manifestations are common in Erdheim-Chester disease (ECD) patients. ECD is a rare non-Langerhans form of histiocytosis with multisystemic infiltration. The involvement of the hypothalamo-pituitary axis is common and central diabetes insipidus (CDI) is one of the most common endocrine manifestations in ECD patients.

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Immune checkpoint inhibitors (ICIs) are potent therapeutic options for many types of advanced cancer. The expansion of ICIs use however has led to an increase in immune-related adverse events (irAEs). Secondary adrenal insufficiency (AI) can be life-threatening especially in patients with delayed diagnosis.

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The incidence of thyroid carcinoma has been increasing worldwide. This is interpreted as an increase in the incidental detection of papillary thyroid microcarcinomas (PTMCs). However, mortality has not changed, suggesting overdiagnosis and overtreatment.

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Background: We previously identified estrogen-responsive finger protein (Efp) as an estrogen-induced gene, and showed that the positive immunoreactivity of Efp is a poor prognostic factor for patients with breast cancer. We also demonstrated that Efp has distinctive roles in innate immunity by activating pattern recognition receptor retinoic acid-inducible gene I (RIG-I). The clinical value of RIG-I protein expression in breast cancer had not been evaluated in relationship with patients' prognosis.

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We previously reported that a strong immunoreactivity of tripartite motif-containing 44 (TRIM44) predicts the poor prognosis of patients with invasive breast cancer, and proposed that TRIM44 activates nuclear factor-κB (NF-κB) signaling as a causative mechanism. In the present study, we examined the clinicopathological roles of A20, which is known to be an NF-κB responsive gene, with TRIM44, in an updated cohort. Tissue samples of invasive breast cancer were obtained from 140 Japanese female breast cancer patients who underwent surgical treatment.

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Article Synopsis
  • V2 vasopressin receptor (V2R) is linked to diseases through mutations that can either hinder or enhance its function, specifically affecting water balance in the body.
  • Loss-of-function mutations lead to nephrogenic diabetes insipidus (NDI), while gain-of-function mutations result in nephrogenic syndrome of inappropriate antidiuresis (NSIAD).
  • The study of V2R mutations indicates complex functional mechanisms and suggests new treatment possibilities, including pharmacochaperones for NDI and inverse agonists for NSIAD, while also enhancing our understanding of GPCR roles and mechanisms.
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Primary hyperparathyroidism (PHPT) is a common endocrine disease. Although surgical treatment is curative in most cases, there are few alternative therapies for the hypercalcemia caused by PHPT. Cinacalcet is a positive allosteric modulator of the calcium sensing receptor and was conditionally approved in Japan in 2014 to treat PHPT cases.

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Biased agonism is a paradigm that may explain the selective activation of a signaling pathway via a GPCR that activates multiple signals. The autoantibody-induced inactivation of the calcium-sensing receptor (CaSR) causes acquired hypocalciuric hypercalcemia (AHH). Here, we describe an instructive case of AHH in which severe hypercalcemia was accompanied by an increased CaSR antibody titer.

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Ectopic ACTH syndrome (EAS) due to a prostate small cell carcinoma (SCC) is very rare with only 26 cases reported to date and has a poor prognosis. We here describe another case of this disorder that was clinically typical based on prior reports as it showed hypercortisolemia and severe hypokalemia with multiple metastasis. However, our current case of prostate SCC causing EAS is the first to display negative immunostaining for ACTH despite detectable POMC mRNA expression in the primary lesion.

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Objective: Central hypothyroidism (CH) is a well-known adverse effect of bexarotene treatment for cutaneous T-cell lymphoma (CTCL). While concomitant levothyroxine therapy is recommended in these cases, associations between ethnic variation or susceptibility and bexarotene-induced CH have not yet been reported. This study aimed to characterize the kinetics and dose dependency of bexarotene-induced CH in Japanese patients.

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Glomeruloid hemangioma is a rare cutaneous lesion that has been considered as a specific cutaneous marker of POEMS syndrome. Herein, we present the first case of glomeruloid hemangioma associated with TAFRO syndrome, a unique variant of idiopathic multicentric Castleman disease. The patient is a 74-year-old woman presented with fever, cervical lymphadenopathy, thrombocytopenia, bilateral pleural effusions and ascites.

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