Atopic dermatitis (AD) in older adults represents a newly defined subgroup of AD. The prevalence of elderly AD is approximately 1-3% among elderly populations in industrialized countries. Elderly patients with AD show some common clinical characteristics, such as a male predominance, a lower incidence of lichenified eczema at the elbow and knee folds, and particular patterns of onset and clinical course. Both immunoglobulin (Ig)E-allergic and non-IgE-allergic types are observed in elderly AD. Elderly patients with IgE-allergic AD show high rates of positivity for specific IgE antibodies against house dust mites, associations with IgE allergic and asthmatic complications, histopathological features with a predominance of IgE-mediated allergic inflammation in the lesional skin, and a significantly lower incidence of malignancy as compared with control subjects. The etiology of elderly AD might be associated with immunosenescence, age-related changes to the sex hormone milieu, age-related barrier dysfunctions in the skin and gut, functional disturbance of sweat production, and environmental stimuli in the lifestyle of elderly individuals. Powerful anti-inflammatory treatments, such as oral corticosteroids, might be required together with standard treatments to manage moderate to severe cases of elderly AD. Finally, most elderly patients with AD reach the end of life with this disease, which should now be considered a lifelong allergic disease. Geriatr Gerontol Int 2016; 16 (Suppl. 1): 75-86.

The aim of the present study was to analyze the characteristics of atopic dermatitis (AD) in the senile phase. Subjects were comprised of 16 patients investigated for clinical features, serum immunoglobulin (Ig)E levels and skin manifestations. Mean age was 76.9 +/- 6.2 years (range, 68-87), with a man : woman ratio of 3:1. Mean age at onset was 67.7 +/- 15.7 years. Eight patients (50%) had personal histories of chronic eczema until the young adult phase and three patients (18.8%) showed the classic course of child AD. Eczematous erythroderma in 10 patients (62.5%) and unclassified chronic eczema in five patients (31.3%) were the predominant clinical presentations. Mean total IgE level in sera of the 16 patients was 8810 +/- 13 511 IU/mL (range, 5-53 605). Fourteen patients showed positive results for antigen-specific IgE antibodies, and the mean total IgE level for these patients was 10 056 +/- 14 044 IU/mL. Specific IgE to the main antigen, Dermatophagoides farinae, was observed in 12 patients (85.7%), representing the principal antibody in eight patients (57.1%). Eczematous dermatitis manifested predominantly in the face and neck, trunk and extensor and flexure sites of extremities, and less commonly in the antecubital and popliteal areas. Other stigmata of AD were observed as follows: red face in 10 patients (62.5%); Hertoghe's sign in six (37.5%); goose-skin in four (25%); facial pallor in three (18.8%); and dirty neck in one (6.3%). These results indicate that senile-type AD represents a characteristic subgroup of AD that appears in the last stage of life in AD patients.

Atopic eczema (AE) in the elderly is gradually increasing and has been added to the classification of AE in recent years. This investigation retrospectively analyzed 60 patients with elderly AE. Among the clinical characteristics, a male predominance, existence of several patterns of onset and clinical course, and associations with immunoglobulin (Ig)E-allergic-status and asthmatic complication were observed. The highest positive-rate and positive-score for serum-specific IgE against Dermatophagoides farinae were 83.8% and 2.65 in patients with IgE-allergic AE, and a lower incidence of lichenified eczema in the elbow and knee folds were observed. In terms of treatments and outcomes, clinical improvement and clinical remission were observed in 80.8% and 36.5% of cases, respectively, using standard treatments and combined therapy with oral corticosteroid in severe cases. As for complications and final prognosis, most elderly AE patients reached the end of life with AE, but patients with IgE-allergic AE showed significantly lower incidences of complications of malignancy and death from malignancy. These results indicate that AE in the elderly represents a new subgroup of AE with specific features.

Though atopic dermatitis (AD) is relatively uncommon in the elderly, elderly patients with AD are gradually increasing in industrialized countries associated with an aging society. Therefore, the clinical features of senile AD are becoming more apparent in some aspects. Three patterns of onset-senile onset, recurrence of AD with a history of classic childhood AD, and recurrence or continuation of adult AD-are associated with AD in the elderly. A male predominance in elderly AD may be a characteristic feature that differs from adult AD. Localized lichenifications in the folds of elbows and knees that are typical of classic AD are uncommon. Similar to AD in the other age groups, both extrinsic and intrinsic forms of AD exist in the elderly, and the major environmental allergens in the extrinsic form are house dust mite, followed by pollens and foods. In addition to the clinical features, this review focuses on the pathogenesis, diagnosis, management and future directions of this new subgroup of AD.

A prospective clinical investigation of 45 patients with lichen planus (LP) demonstrated a significant association between LP and chronic hepatitis C. Anti-hepatitis C virus (HCY) antibodies were found in 17 (37.8%) of the 45 LP patients. This was significantly higher than in the controls. This higher prevalence of anticHCV antibodies was found equally in both male and female patients in the three types of LP; cutaneous only type, mucous only type, and both cutaneous and mucous type. Most ofthe patients with positive anti-HCV antibodies had abnormal values of transaminase enzymes and/or a past history of chronic hepatitis. Histological and immunohistological investigations of three cases with LP and chronic hepatitis C demonstrated some morphologic similarities between these two diseases. Histopathologic findings of both LP and chronic hepatitis C were based on a T lymphocytic infiltrate with keratinocyte or hepatocyte damage. The degrees of infiltrating cells positive to UCHL-l, MX-panB, Leu-7, and human leukocyte antigen (HLA)-DR antibodies in the chronic hepatitis C lesions seemed to be similar to those in the LP lesions. These results may support a possible relationship between LP and chronic hepatitis C and the hypothesis that LP may be associated with chronic liver diseases as a result of a cytotoxic attack on the hepatocytes. Table 1. Cases oflichen planus (LP) and controls Subjects and Methods Clinical investigationsForty-five patients with LP were observed in a pointed out since the 1970's (2-6); recently, several reports (7-10) have particularly indicated the involvement of hepatitis C virus (HCV)-related chronic hepatitis (chronic hepatitis C) in the development of LP.In this study, we investigated the clinical and histopathologic association of LP with chronic hepatitis C.