Publications by authors named "Kohei Oguni"

A 60-year-old woman with rheumatoid arthritis and an impaired consciousness was referred to our hospital. Prior to transfer, the patient underwent intensified immunosuppressive therapy under a diagnosis of rheumatoid vasculitis that had developed in her buttocks. Upon hospitalization, she developed severe multiorgan failure and hemophagocytic syndrome.

View Article and Find Full Text PDF

Background: Blood culture remains the gold standard for diagnosing bacteremia; however, contamination inevitably occurs in 2-3% of cases, requiring differentiation between true bacteremia and contamination. Although time to positivity (TTP) aids in this clinical decision, with detection after 24 hours generally indicating contamination, technological advances in blood culture systems may have shortened this threshold interval.

Methods: This study retrospectively analyzed blood culture data in our hospital from April 2023 to January 2025 to determine the optimal TTP cutoff.

View Article and Find Full Text PDF

During the coronavirus disease 2019 (COVID-19) pandemic, people in Japan were urged to stay at home as much as possible, and this resulted in significant changes in lifestyle behavior. The new lifestyle included factors affecting both energy intake and energy consumption, and it is now thought that weight gain during the lockdown was the result of complex effects. The aim of this study was to determine the relationships among lifestyle habits, laboratory data, and body weight gain during the lockdown using medical check-up data.

View Article and Find Full Text PDF

Phaeohyphomycosis is a rare fungal infection that presents significant challenges in diagnosis and treatment. Herein, we document a case of a cerebellar abscess caused by Cladophialophora bantiana. A 77-year-old woman with type 2 diabetes mellitus and a previous history of diffuse large B-cell lymphoma gradually developed ataxia and was transferred to an emergency department.

View Article and Find Full Text PDF

Fibroblast growth factor receptor 1 (FGFR1), also known as KAL2, is a tyrosine kinase receptor, and variants of have been detected in patients with Kallmann syndrome (KS), which is a congenital developmental disorder characterized by central hypogonadism and anosmia. Herein, we report an adult case of KS with a novel variant of . A middle-aged male was referred for a compression fracture of a lumbar vertebra.

View Article and Find Full Text PDF

Subclinical hypothyroidism (SCH) is diagnosed when thyroid function tests show that the serum thyrotropin (TSH) level is elevated and the serum free thyroxine (FT4) level is normal. SCH is mainly caused by Hashimoto's thyroiditis, the prevalence of which increases with aging. Recently, it has been revealed that SCH is associated with risk factors for cardiovascular diseases (CVDs), including atherosclerosis, dyslipidemia and hypertension, leading to cardiovascular morbidity and mortality.

View Article and Find Full Text PDF

A 16-year-old girl presented with a high fever that had persisted for more than 4 weeks. Computed tomography revealed a 4-cm mass in the left adrenal gland. Clinically, there were no obvious symptoms of adrenal hormone excess; however, serum interleukin-6 (IL-6) and C-reactive protein levels were significantly elevated.

View Article and Find Full Text PDF

Cryptococcus prostatitis is an uncommon manifestation of cryptococcal infection that occurs mostly in immunocompromised patients. Tocilizumab, an anti-interleukin-6 receptor monoclonal antibody, has been associated with an increased risk of cryptococcal infections. However, there have been no documented cases of cryptococcal prostatitis in patients receiving tocilizumab therapy.

View Article and Find Full Text PDF
Article Synopsis
  • Ureaplasma urealyticum is a rare pathogen linked to septic arthritis, especially in patients with low immunoglobulin levels, and this is the first reported case of such an infection in Japan.
  • A 23-year-old woman with secondary hypogammaglobulinemia experienced severe joint inflammation that did not respond to standard treatments; advanced imaging and fluid analysis revealed U. urealyticum as the cause.
  • The case underscores the importance of using 16S rRNA gene sequencing for identifying difficult-to-culture bacteria in septic arthritis, confirming U. urealyticum as a potential threat in immunocompromised individuals.
View Article and Find Full Text PDF

We present a patient with hypertension who developed a rare type of incidentaloma, a benign adrenal cyst. Benign adrenal cysts are typically large; however, most are nonfunctioning and asymptomatic, and they can be managed conservatively.

View Article and Find Full Text PDF

Serum levels of growth hormone (GH) and insulin-like growth factor (IGF)-I are crucial in the diagnosis and management of GH-related diseases. However, these levels are affected by nutritional and metabolic status. To elucidate the correlations between GH and IGF-I in various conditions, a retrospective analysis was performed for adult patients in which GH levels were examined by general practitioners during the period from January 2019 to December 2021.

View Article and Find Full Text PDF

Octreotide is used in patients with insulinomas to treat hypoglycemia, and somatostatin receptor (SSTR) 2 expression is important for its efficacy. We report a case of insulinoma in a 50-year-old woman that responded to an octreotide test, showed accumulation in somatostatin scintigraphy, and was positive for SSTR2A on immunostaining.

View Article and Find Full Text PDF

Cryptococcal meningitis is a critical disease that occasionally involves immunosuppressed patients. We herein report a 79-year-old Japanese man who received low-dose prednisolone therapy for neurosarcoidosis and panhypopituitarism. He presented a 10-day history of a fever and altered mental status.

View Article and Find Full Text PDF
Article Synopsis
  • Orexin is crucial for controlling sleep, wakefulness, and feeding, and this study investigates its effects on pituitary gonadotropin regulation using mouse cells that express specific orexin receptors.
  • Orexin A increases the expression of LHβ and FSHβ mRNA in a dose-dependent way, but it also suppresses gonadotropin expression induced by GnRH, while affecting the expression of GnRH receptors.
  • The study reveals that orexin A influences gonadotropin expression through clock genes and interacts with BMP signaling, highlighting a complex regulatory relationship in gonadotrope cells.
View Article and Find Full Text PDF
Article Synopsis
  • Somatostatin analogs, like octreotide and pasireotide, suppress luteinizing hormone (LH) secretion and mRNA expression in mouse gonadotrope LβT2 cells, especially when combined with BMP-6.
  • BMP-6 enhances the activity of somatostatin receptor (SSTR)5, which contributes to the reduction of GnRH-induced LH secretion by influencing signaling pathways.
  • The study suggests that somatostatin analogs can both inhibit and modulate BMP signaling, revealing a complex interaction in the regulation of LH production in gonadotrope cells.
View Article and Find Full Text PDF