円形脱毛症の原因・検査・最新治療を皮膚科専門医が解説｜JAK阻害薬まで

This video, based on the 2024 guidelines, explains the causes, types, diagnostic tests, and treatments of alopecia areata, as explained by a dermatologist. It covers current treatment options, from topical steroids to oral JAK inhibitors. *Effects and progress may vary from person to person. ━━━━━━━━━━━━━━ 📌 Table of Contents (Timestamps) ━━━━━━━━━━━━━━ 0:00 Introduction 0:22 Main Content 2:29 Causes of Alopecia Areata 4:11 Incidence and Proneness 6:14 Types of Alopecia Areata 7:18 Diagnostic Tests for Alopecia Areata 8:31 Treatment Methods 10:51 Latest Treatments (JAK Inhibitors) 12:40 Summary 13:52 Announcements ━━━━━━━━━━━━━━ 🔑 Key Points of This Video ━━━━━━━━━━━━━━ • Alopecia areata is not caused solely by stress; it is an autoimmune disease in which T lymphocytes attack hair follicles. • It is estimated that approximately 1-2% of people in Japan (1-2 out of 100) suffer from it, making it a not-so-uncommon disease. • Treatment strategies differ depending on the type, such as single-spot, multiple-spot, totalis, universalis, and serpentine alopecia. • ​​Dermatological examination methods include the pull test (hair pulling test) and trichoscopy. • There are stepwise treatment options, from topical steroids and local injections to pulse therapy, phototherapy, topical immunotherapy, and oral JAK inhibitors. • As of 2024, oral JAK inhibitors have been added as a new treatment option for refractory and severe cases. ━━━━━━━━━━━━━━ ❓ Q&A (Frequently Asked Questions) ━━━━━━━━━━━━━━ Q. Is stress the cause of alopecia areata? A. While stress is considered one of the triggers (switches) for the onset of alopecia areata, the underlying condition is an autoimmune disease. T lymphocytes in the body target the body's own hair follicles, which they should not normally attack, causing inflammation. Cases of onset after viral infections or vaccinations have also been reported. Q. What types of alopecia areata are there? A. They are broadly classified into: ① single-spot type (one area), ② multiple-spot type (multiple areas), ③ totalis type (entire scalp), ④ universalis type (including body hair), and ⑤ serpentine type (band-like hairline). The treatment method varies depending on the type and severity. Q. How are alopecia areata tests performed? A. Typical tests include the "pull test" (hair pulling test), which involves gently pulling hair around the bald area, and "trichoscopy," which involves observing hair follicles with a dermatoscope (magnifying glass). Trichoscopy reveals characteristic findings such as broken hairs, exclamation mark hairs, and black dots. Q. Which patients are treated with oral JAK inhibitors? A. They are considered for use in adult patients with severe or refractory hair loss (50% or more of the affected area) who have not shown improvement for more than six months since the onset of symptoms. Use is considered at the discretion of a physician. While efficacy has been reported, evaluation of indications and side effects requires consultation with a specialist. Individual results may vary. ━━━━━━━━━━━━━━ ⚠️ Disclaimer ━━━━━━━━━━━━━━ This video is intended to provide health-related information and is not a substitute for diagnosis or treatment. Effects and progress may vary from person to person. If you have any concerns about your health, please consult a medical institution near you. We may not be able to answer medical questions in the comments section because we cannot examine the affected area. Thank you for your understanding. ━━━━━━━━━━━━━━ 👨‍⚕️ Director's Profile ━━━━━━━━━━━━━━ Takaaki Hanafusa Chairman, Osaka Hanafusa Dermatology Group, Yuryokai Medical Corporation Director, Senri Chuo Hanafusa Dermatology & Cosmetic Dermatology Clinic 【Specialist Certifications and Qualifications】 ・Doctor of Medicine (Osaka University Graduate School) ・Certified Dermatologist, Japanese Dermatological Association ・Certified Allergist, Japanese Society of Allergology ・Certified Anti-Aging Medicine Specialist, Japanese Society of Anti-Aging Medicine ・Designated Physician for Intractable Diseases 【Affiliated Societies】 Japanese Dermatological Association / Japanese Society of Allergology / Japanese Society for Pediatric Dermatology / Japanese Society of Anti-Aging Medicine / Japanese Society for Cosmetic Dermatology 【Publications】 『Hybrid Dermatology』 https://amzn.asia/d/0ja20if9 ━━━━━━━━━━━━━━ 🏥 Osaka Hokusetu 3 Clinics [Hanafusa Dermatology Group] ━━━━━━━━━━━━━━ Dermatology, Cosmetic Dermatology, Allergy Clinic ✅ Senri Chuo Hanafusa Dermatology & Cosmetic Dermatology Clinic (Toyonaka City) https://hanafusa-hifuka.com/ ▶ Alopecia Areata Treatment Page https://hanafusa-hifuka.com/symptoms/... ▶ Disease Column "What is Alopecia Areata? Symptoms, Causes, and Treatments" https://hanafusa-hifuka.com/disease/a... ▶ Disease Column "Treatment and Cure for Alopecia Areata" https://hanafusa-hifuka.com/disease/a... ▶ Disease Column "What are the Causes of Alopeci...