Publications by authors named "Kurokawa I"

Acne is a common skin disease associated with a range of sequelae. These include scarring and dyspigmentation, emotional and psychosocial disturbances, and occupational problems, in part because acne often manifests on the face, in addition to other body areas, and is highly visible. Worldwide, the prevalence of acne is estimated at 9.

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Background: A wide variety of dermocosmetics (products with both active skincare and cosmetic activity) are available for the management of acne vulgaris. These products are important because they may be the first line of approach for patients desiring to self-treat and they can also have beneficial effects-reducing lesion counts and improving global acne severity. When used in conjunction with medical therapy, dermocosmetics can improve tolerability and enhance results.

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We report a case of hidradenitis suppurativa (HS) with skin ulceration in a 19-year-old man. He was successfully treated with topical bucladesine ointment treatment, resulting in a hypertrophic scar 2 months after the treatment. Bucladesine can be an alternative treatment option for ulceration in HS.

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In Japan, as in other countries around the world, acne vulgaris is a common disease and a frequent reason for patients to consult dermatologists. For optimal management of acne, it is important to understand how available products to support skin health can be used both with and without prescription products. Dermocosmetics can be defined as skincare agents with dermatologically active ingredients that directly support or care for the symptoms of various skin conditions (distinct from vehicle effects).

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Article Synopsis
  • * A postmarketing surveillance study, which involved 83 participants over 52 weeks, evaluated the drug's safety and effectiveness in real-world settings, focusing on adverse drug reactions (ADRs) and clinical outcomes.
  • * Findings showed that 62.8% of patients achieved significant clinical response after a year, with a manageable safety profile; however, there was one serious adverse event leading to a fatality due to liver disorder.
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Objectives: We aimed to report the background of patients with vesicovaginal fistulas (VVFs) at our center, which has treated a relatively large number of such patients in Japan, as well as the ingenuity and outcomes of vesicovaginal fistula closure (VVFC). We also investigated the causes of VVFs.

Methods: A retrospective review was performed for 28 patients with VVFs treated at our center.

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A 15-year-old Japanese male noticed brown macules on his back 9 months ago. Initial examination revealed reticulated infiltrative erythema and pigmentation with blisters on the erythema of the back. Histopathology showed blisters with eosinophil infiltration in the epidermis, and direct immunofluorescence showed negative results for immunoglobulin (Ig) G, Ig A, Ig M, and C3 in the epidermal basement membrane zone.

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Proper management of memories by forgetting and retrieval is essential for animals to adapt their behavior to changing environments. To elucidate the mechanisms underlying forgetting, we use olfactory learning to an attractive odorant, diacetyl, in hermaphrodites as a model. In this learning paradigm, the TIR-1/JNK-1 pathway in AWC sensory neurons accelerates forgetting of the olfactory memory, which is stored as a sensory memory trace in AWA sensory neurons.

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Skin infections caused by methicillin-resistant Staphylococcus aureus (MRSA) and the spread of antimicrobial resistance are a major problem in Japan. Here, we investigated the susceptibility of S. aureus clinical isolates to ozenoxacin (OZNX), a topical antimicrobial approved for superficial skin infection treatment in Japan.

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Forgetting is important for animals to manage acquired memories to enable adaptation to changing environments; however, the neural network in mechanisms of forgetting is not fully understood. To understand the mechanisms underlying forgetting, we examined olfactory adaptation, a form of associative learning, in The forgetting of diacetyl olfactory adaptation in is regulated by secreted signals from AWC sensory neurons via the TIR-1/JNK-1 pathway. These signals cause a decline of the sensory memory trace in AWA neurons, where diacetyl is mainly sensed.

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Objective: Demand for erectile dysfunction treatments has increased not only in elderly patients but also in young patients. Reports indicate that frequent causes of erectile dysfunction in Japan are organic disorders in elderly patients and psychogenetic disorders in young patients.

Methods: We defined patients under the age of 40 as young erectile dysfunction patients, and those over 65 as elderly erectile dysfunction patients.

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Aims: FemiCushion (FC) is a supportive device for pelvic organ prolapse (POP), but its effectiveness has not been evaluated with imaging studies. This study utilized magnetic resonance imaging (MRI) to evaluate the anatomic changes induced by FC use in patients with severe POP.

Methods: This prospective study examined patients with stage 3 or 4 POP who underwent treatment with FC and received a diagnostic MRI.

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Article Synopsis
  • Hidradenitis suppurativa (HS) is a chronic and painful skin condition that causes abscesses and nodules, and adalimumab is a medication approved for its treatment in various countries, including Japan.
  • A recent study conducted in Japan (March 2019 - May 2021) assessed the safety and effectiveness of adalimumab in 84 patients, with results indicating that the majority of patients saw improvements in skin pain and quality of life within 12 weeks.
  • The study concluded that adalimumab is a well-tolerated and effective treatment, with no serious infections reported and a low number of adverse effects among those treated.
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Previous approaches to acne management have focused on the four main factors implicated in acne, namely, androgen-mediated sebogenesis (considered integral to acne), hyperkeratinization, colonization with Cutibacterium acnes, and inflammation related to both innate and adaptive mechanisms. Recent advances have facilitated potential novel approaches to acne management, as the pathophysiology and the immunological aspects related to acne and wound healing have evolved. Particular targets that have been shown to be closely involved in acne pathophysiology and wound healing include interleukin (IL)-1β, IL-17, IL-23, and tumor necrosis factor alpha (TNFα).

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Hidradenitis suppurativa (HS) in South-East Asia and East Asia shows distinct clinical, environmental, physiological and likely genetic differences compared with the West. A male predominance is present, which may be due to differences in smoking habits. Involvement of the buttocks is common in East Asian patients, while the axillae are most commonly affected in South-East Asian patients.

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Multidisciplinary investigations into the pathogenesis of acne have significantly progressed over the past three years. Studies of the etiology of acne from the perspectives, for example, of sebaceous gland biology, sebum, genetics, keratinization, differentiation, hair cycles, immunology, bacteriology, and wound healing have elucidated its pathogenesis. This has led to the development of new therapies and paved the way for advanced studies that will enable the further evolution of acne treatment.

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Objectives: To investigate the correlation between the Erection Hardness Score and both erectile function and metabolic and lifestyle factors.

Methods: This study included 548 men who underwent a complete standard medical checkup at Yokohama Shin-midori General Hospital between 1 July 2016 and 31 August 2018, and answered the question about erectile hardness. The following variables were evaluated: age, erectile hardness on the Erection Hardness Score, erectile function on the Sexual Health Inventory for Men, current medical history (diabetes, hypertension, dyslipidemia, heart disease, stroke), metabolic risk factors (abdominal circumference, hyperglycemia, high blood pressure, lipid abnormality) and lifestyle factors.

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A 38-year-old woman who consulted a local doctor with chief complaints of sudden palpitations, headaches, and chest pain is herein presented. After admission, pheochromocytoma crisis was suspected. Since the patient had a history of acute heart failure and had once survived an episode of cardiac arrest, a rapid decrease in the catecholamine levels was needed.

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Background: Nevus is a hamartoma or malformation of one or more skin components, resulting in aberrant differentiation of the cell lineage(s) mostly during developmental stages. Although multiple lineages may be involved in a nevus, the combination of melanocyte and keratinocyte abnormalities has been rarely discussed.

Objectives: To present two cases of congenital nevi with hypomelanosis and superficial fine scales.

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Article Synopsis
  • A case study of a 52-year-old woman reveals her struggles with hypertension and diabetes, which worsened over time despite treatment.
  • After developing symptoms like headaches and palpitations, imaging studies identified a 4-cm mass in her left adrenal gland linked to elevated catecholamine levels.
  • Post-rupture, significant changes were noted in imaging and hormone levels, leading to a diagnosis of pheochromocytoma confirmed by histopathological examination of the resected tumor, which showed signs of hemorrhagic necrosis.
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