Hair pain (trichodynia): frequency and relationship to hair loss and patient gender.

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Dermatology 2002;205(4):374-7

Hair pain (trichodynia): frequency and relationship to hair loss and patient gender.

Background: Patients complaining of hair loss frequently claim that their hair has become painful. Objective and Methods: The aim of the study was to evaluate the frequency of this phenomenon and its relationship to hair loss. Patients seeking advice for hair loss either spontaneously reported or were questioned about painful sensations of the scalp. Hair loss activity was quantified by a hair pull, daily count and wash test. Telogen percentage was obtained by a hair pluck. The scalp surface was examined by dermatoscopy. Results: Of 403 examined patients, 20% of women and 9% of men reported hair pain, irrespective of the cause and activity of hair loss. A minority presented scalp telangiectasia. This strongly correlated with hair pain. Conclusions: Hair pain (trichodynia) affects a significant proportion of patients complaining of hair loss and may increase the anxiety. The symptom neither allows discrimination of the cause nor correlates with the activity of hair loss. A higher prevalence of female patients might be connected to gender-related differences in pain perception in relation to anxiety. The role of vasoactive neuropeptides in the interaction between the central nervous system and skin reactivity is discussed. In the absence of any correlation with quantitative parameters of hair loss or specific morphologic changes of the scalp, management remains empiric and tailored to the individual.

J Dermatol 2002 Oct;29(10):653-6

Idiopathic CD4+ T lymphocytopenia associated with disseminated flat warts and alopecia areata.

Idiopathic CD4+ T lymphocytopenia is a very rare condition characterized by persistent depletion of circulating CD4+ T lymphocytes, without evidence of HIV or HTLV infection, or other identifiable causes of immunodeficiency. The syndrome can present with dermatological diseases, including viral, fungal and bacterial infections, as well as Kaposi's sarcoma, epithelial cell malignancies, lymphoma and inflammatory dermatoses. We report the case of a 47-year-old woman with idiopathic CD4+ T lymphocytopenia who presented with a 10-year history of disseminated and refractory flat warts from which human papillomavirus type 3 DNA was identified. The patient also had alopecia areata.

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.

Eur J Immunogenet 2002 Feb;29(1):25-30

Genetic analysis of the interleukin-1 receptor antagonist and its homologue IL-1L1 in alopecia areata: strong severity association and possible gene interaction.

Alopecia areata is an inflammatory hair loss disease with a major genetic component. The presence of focal inflammatory lesions with perifollicular T-cell infiltrates reflects the importance of local cytokine production in the pathogenesis. In addition to its fundamental pro-inflammatory role, the interleukin-1 (IL-1) system has major effects on hair growth regulation in vitro, with the inhibitory actions of IL-1alpha and IL-1beta being opposed by the receptor antagonist IL-1ra. The novel interleukin-1 like molecule 1 (IL-1L1) which has greatest gene sequence homology with IL1RN, the gene encoding IL-1ra, is another potential IL-1 antagonist. In view of previous studies suggesting a significant role for IL1RN polymorphisms in the pathogenesis of autoimmune/inflammatory disease, we have analysed polymorphisms of IL-1ra (IL1RN+2018) and its homologue IL-1L1 (IL1L1+4734) in a case-control association study on 165 patients and a large number of matched controls. Homozygosity for the rare allele of IL1RN (IL1RN*2) was significantly associated with alopecia areata [odds ratio (OR) = 1.89, 95% CI (1.09, 3.28); P = 0.02], confirming our previous findings of significant association with the IL1RN variable number tandem repeat (VNTR). The results also revealed a novel association involving a polymorphism of the interleukin-1 receptor antagonist homologue IL1L1 at position + 4734, IL1RN+2018, and alopecia areata. The effect of a genotype combining three copies of the rare alleles at the IL1RN and IL1L1 loci conferred a more than additive increase in the risk of disease compared to IL1RN+2018 or IL1L1+4734 alone [OR 3.37 (1.60, 7.06); P = 0.002], suggesting possible synergy between the IL1RN and IL1L1 genes. This effect was stronger in patients with severe disease (alopecia totalis/universalis) [OR 4.62 (1.87, 11.40), P = 0.0022], and in those with early age at onset (< 20 years) [OR = 6.38 (2.64, 15.42), P = 0.0002]. Our results suggest that these polymorphisms within IL1RN and IL1L1 themselves or a gene in linkage disequilibrium with IL1RN and IL1L1 predispose to the more severe forms of alopecia areata.

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