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Int J Dermatol 2002 Nov;41(11):748-53

The pattern and profile of alopecia areata in Singapore - a study of 219 Asians.


BACKGROUND: Alopecia areata is believed to be an autoimmune condition with a worldwide occurrence. It usually presents as patchy, nonscarring hair loss. There is a paucity of clinical data in Asians. OBJECTIVE: To study the epidemiology, clinical aspects, associations, and treatment of alopecia areata in an Asian population over a 1-year period. METHODS: Records of all newly diagnosed alopecia areata cases seen from May 1998 to April 1999 at the National Skin Center were collated with regard to the epidemiology, pattern of alopecia, and associations according to the investigational guidelines published by Oslen et al. The treatment and psychologic impact of alopecia areata were also assessed. RESULTS: Two hundred and nineteen new case referrals of alopecia areata were seen from May 1998 to April 1999. The incidence of alopecia areata was 3.8%. There were 173 Chinese (79%), 35 Indians (16%), and 11 Malays (5.0%). The male to female ratio was 1 : 1.3. The median age at presentation was 25.2 years. The majority of patients (85.5%) had their first episode of alopecia areata before the age of 40 years. Of the patients with onset of alopecia areata before the age of 40 years, 36.5% presented with extensive alopecia, compared with 5.5% above the age of 40 years (P < 0.05). Nail changes, consisting of pitting, trachyonychia, and longitudinal ridging, were reported in 23 patients (10.5%). A significant percentage of patients had an associated personal and family history of atopy (60.7%). There was no significant association between a personal history of atopy and the extent of alopecia areata. The frequencies reported for the following associated diseases were: thyroid disease, 2.3%; vitiligo, 4.1%; diabetes mellitus, 3.2%; Down's syndrome, 1.4%; and rheumatic arthritis, 0.9%. A family history of alopecia areata was reported in 4.6%. Intralesional triamcinolone acetonide was the first-line treatment for limited alopecia areata, while squaric acid dibutyl ester was used for extensive involvement. The majority of patients with limited alopecia areata (82.1%) had more than 50% improvement with intralesional triamcinolone acetonide after 3 months. The majority of patients who received squaric acid dibutyl ester (87.5%) achieved more than 50% regrowth at the end of 6 months. Poor prognostic factors for alopecia areata were extensive involvement, early age of onset, and Down's syndrome. Thirteen out of 132 respondents (9.8%) recalled stressful events preceding hair loss. Patients with extensive alopecia areata experienced more psychologic adverse effects than those with limited alopecia areata (P < 0.05). Males with extensive alopecia areata experienced more severe psychologic ill-effects, such as depression and feelings of inability to improve hair loss. CONCLUSIONS: Our findings are similar to those reported in the Western literature where alopecia areata is predominantly a disease of the young. A holistic approach is important in the management of alopecia areata as the disease can have a severe psychologic impact on an individual's well-being.


Dermatology 2002;205(2):108-10

Kenogen. A new phase of the hair cycle?


BACKGROUND: A novel phenomenon has been described by the phototrichogram: the emptiness of the follicle after teloptosis. We called this phenomenon kenogen, from the Greek kappaepsilonnuovarsigma, 'empty'. OBJECTIVE: To describe the kenogen phase in its details. METHODS: Analysis of the existing literature. RESULTS: The original observation in 2 women was confirmed in 10 balding and non-balding males studied for 14 years in whom kenogen lasted about 4 months increasing up to about 7 months and affecting 80% of all hair cycles. In 2 women with progressing androgenetic alopecia studied for 2 years, kenogen involved 22% of the hair follicles, lasting from 3 months to 1 year. In a prepubertal boy studied for 1 year, it involved 8% of hairs and lasted about 2 months. CONCLUSION: During kenogen, the hair follicle rests physiologically, but duration and frequency are greater in androgenetic alopecia, possibly accounting for baldness. In addition to the classical cycle, the hair follicle may follow an alternative route during which the telogen phase, not accompanied by a coincident new early anagen, ends with teloptosis leaving the follicle empty.


Dermatol Surg 2002 Aug;28(8):678-85

Fluridil, a rationally designed topical agent for androgenetic alopecia: first clinical experience.


BACKGROUND: Fluridil, a novel topical antiandrogen, suppresses the human androgen receptor. While highly hydrophobic and hydrolytically degradable, it is systemically nonresorbable. In animals, fluridil demonstrated high local and general tolerance. OBJECTIVE: To evaluate the safety and efficacy of a topical anti- androgen, fluridil, in male androgenetic alopecia. METHODS: In 20 men, for 21 days, occlusive forearm patches with 2, 4, and 6% fluridil, isopropanol, and/or vaseline were applied. In 43 men with androgenetic alopecia (AGA), Norwood grade II-Va, 2% fluridil was evaluated in a double-blind, placebo-controlled study after 3 months clinically by phototrichograms, hematology, and blood chemistry including analysis for fluridil, and at 9 months by phototrichograms. RESULTS: Neither fluridil nor isopropanol showed sensitization/irritation potential, unlike vaseline. In all AGA subjects, baseline anagen/telogen counts were equal. After 3 months, the average anagen percentage did not change in placebo subjects, but increased in fluridil subjects from 76% to 85%, and at 9 months to 87%. In former placebo subjects, fluridil increased the anagen percentage after 6 months from 76% to 85%. Sexual functions, libido, hematology, and blood chemistry values were normal throughout, except that at 3 months, in the spring, serum testosterone increased within the normal range equally in placebo and fluridil groups. No fluridil or its decomposition product, BP-34, was detectable in the serum at 0, 3, or 90 days. CONCLUSION: Topical fluridil is nonirritating, nonsensitizing, nonresorbable, devoid of systemic activity, and anagen promoting after daily use in most AGA males.


Cancer Epidemiol Biomarkers Prev 2002 Jun;11(6):549-53

Androgenetic alopecia and prostate cancer: findings from an Australian case-control study.


The purpose of this study was to examine the relationship between androgenetic alopecia (AA) and prostate cancer with particular emphasis on early age at diagnosis and higher grade tumors. We conducted an age-stratified, population-based case-control study in Australia of men who were diagnosed before 70 years of age during 1994-1997 with histopathology-confirmed adenocarcinoma of the prostate, excluding well-differentiated tumors. Controls were selected from the electoral rolls, and the frequency was matched on age. After excluding subjects with missing values, the analysis was based on 1446 cases and 1390 controls of whom direct observations were made of their pattern of AA during face-to-face interviews. Our data suggest an association between prostate cancer and vertex baldness; compared with men who had no balding, the adjusted odds ratio (OR) was 1.54 (1.19-2.00). No associations were found between prostate cancer and frontal baldness or when frontal baldness was present concurrently with vertex baldness. The ORs were 0.98 (0.79-1.23) and 1.14 (0.90-1.45), respectively. The highest ORs were for high-grade disease in men 60-69 years of age: 1.80 (1.02-3.16) for frontal baldness; 2.91 (1.59-5.32) for vertex baldness; and 1.95 (1.10-3.45) for frontal and vertex baldness. This association between the pattern of AA and prostate cancer points to shared androgen pathways that are worthy of additional investigation.






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  • Alopecia info.
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  • Hair loss and alopecia research articles: abstracts and source links.



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