Atopic Dermatitis Challenge Center

Superinfected eczema is an inflammation of the skin accompanied by itchy, weeping, oozing lesions. Secondary infection of the open skin can occur as a result of scratching. In this case, the infection was a consequence of sensitivity to wearing shin pads. 

Although superinfected eczema is a complication of eczema, it can produce separate challenges. With damaged protective skin function and disturbance of quantity and quality of skin lipids, patients with eczema may have secondary bacterial infections. Staphylococcus aureus organisms are the most common etiologic agents; up to 90% of patients with eczema have staphylococcal colonization. Streptococcus is less commonly a cause. The progression from colonization to infection often is associated with a flare of eczema, and increased severity of the eczema is associated with more colonization. More erythema may be noted when the infection begins; then, the affected areas become encrusted or show a serous drainage. A clinical clue to superinfection of any kind is when patients stop responding to therapies that they are normally responsive to (eg, topical steroids). 

With the recent increase in methicillin-resistant S. aureus (MRSA), treatment of a secondary infection of eczema with these organisms can be tricky. Patients with eczema and secondary bacterial skin infections should be treated with topical steroids or other anti-inflammatory medications and moisturizers to repair the skin barrier. The level of skin colonization with S. aureus is decreased with use of these agents alone. Topical or systemic antibiotics appropriate for specific or community-based sensitivities may be needed in severe infections.

Because of the damaged protective skin function, cutaneous inoculation of herpes simplex virus (HSV) can occur. Eczema herpeticum, or HSV-associated Kaposi varicelliform eruption, describes eczema secondarily infected with HSV (type 1 or type 2). The eczema may become more erythematous; then, vesicles develop that are arranged in a grouped pattern. Accompanying symptoms include fever, malaise, and lymphadenopathy. The condition can be diagnosed by a Tzanck smear (seeking multinucleated giant cells), a fluorescent antibody smear, or culture of a vesicular lesion. Patients with eczema herpeticum should be treated with acyclovir. More severe involvement may require hospitalization and use of systemic antivirals. In addition, topical steroids and moisturizers should be continued to repair the skin barrier. 

Children with eczema are more likely than adults to acquire molluscum contagiosum infection, and the disease tends to be widespread. The lesions are generally smooth papules, sometimes with umbilicated skin. The lesions can spread by auto-inoculation to surrounding areas. Molluscum dermatitis accompanies 10% of molluscum lesions, and the dermatitis can be difficult to distinguish from eczema lesions. Untreated, molluscum lesions may resolve on their own; if necessary, the lesions can be treated with cantharidin, liquid nitrogen, or curettage. 

Molluscum dermatitis is treated with topical steroids. Early recognition of infections associated with a diagnosis of eczema is critical for timely initiation of appropriate treatment.
 

Brian S. Kim, MD, Associate Professor, Department of Medicine, Division of Dermatology, Washington University School of Medicine, St. Louis, Missouri

Brian S. Kim, MD, has disclosed no relevant financial relationships.

Superinfected eczema is an inflammation of the skin accompanied by itchy, weeping, oozing lesions. Secondary infection of the open skin can occur as a result of scratching. In this case, the infection was a consequence of sensitivity to wearing shin pads. 

Although superinfected eczema is a complication of eczema, it can produce separate challenges. With damaged protective skin function and disturbance of quantity and quality of skin lipids, patients with eczema may have secondary bacterial infections. Staphylococcus aureus organisms are the most common etiologic agents; up to 90% of patients with eczema have staphylococcal colonization. Streptococcus is less commonly a cause. The progression from colonization to infection often is associated with a flare of eczema, and increased severity of the eczema is associated with more colonization. More erythema may be noted when the infection begins; then, the affected areas become encrusted or show a serous drainage. A clinical clue to superinfection of any kind is when patients stop responding to therapies that they are normally responsive to (eg, topical steroids). 

With the recent increase in methicillin-resistant S. aureus (MRSA), treatment of a secondary infection of eczema with these organisms can be tricky. Patients with eczema and secondary bacterial skin infections should be treated with topical steroids or other anti-inflammatory medications and moisturizers to repair the skin barrier. The level of skin colonization with S. aureus is decreased with use of these agents alone. Topical or systemic antibiotics appropriate for specific or community-based sensitivities may be needed in severe infections.

Because of the damaged protective skin function, cutaneous inoculation of herpes simplex virus (HSV) can occur. Eczema herpeticum, or HSV-associated Kaposi varicelliform eruption, describes eczema secondarily infected with HSV (type 1 or type 2). The eczema may become more erythematous; then, vesicles develop that are arranged in a grouped pattern. Accompanying symptoms include fever, malaise, and lymphadenopathy. The condition can be diagnosed by a Tzanck smear (seeking multinucleated giant cells), a fluorescent antibody smear, or culture of a vesicular lesion. Patients with eczema herpeticum should be treated with acyclovir. More severe involvement may require hospitalization and use of systemic antivirals. In addition, topical steroids and moisturizers should be continued to repair the skin barrier. 

Children with eczema are more likely than adults to acquire molluscum contagiosum infection, and the disease tends to be widespread. The lesions are generally smooth papules, sometimes with umbilicated skin. The lesions can spread by auto-inoculation to surrounding areas. Molluscum dermatitis accompanies 10% of molluscum lesions, and the dermatitis can be difficult to distinguish from eczema lesions. Untreated, molluscum lesions may resolve on their own; if necessary, the lesions can be treated with cantharidin, liquid nitrogen, or curettage. 

Molluscum dermatitis is treated with topical steroids. Early recognition of infections associated with a diagnosis of eczema is critical for timely initiation of appropriate treatment.
 

Brian S. Kim, MD, Associate Professor, Department of Medicine, Division of Dermatology, Washington University School of Medicine, St. Louis, Missouri

Brian S. Kim, MD, has disclosed no relevant financial relationships.

Superinfected eczema is an inflammation of the skin accompanied by itchy, weeping, oozing lesions. Secondary infection of the open skin can occur as a result of scratching. In this case, the infection was a consequence of sensitivity to wearing shin pads. 

Although superinfected eczema is a complication of eczema, it can produce separate challenges. With damaged protective skin function and disturbance of quantity and quality of skin lipids, patients with eczema may have secondary bacterial infections. Staphylococcus aureus organisms are the most common etiologic agents; up to 90% of patients with eczema have staphylococcal colonization. Streptococcus is less commonly a cause. The progression from colonization to infection often is associated with a flare of eczema, and increased severity of the eczema is associated with more colonization. More erythema may be noted when the infection begins; then, the affected areas become encrusted or show a serous drainage. A clinical clue to superinfection of any kind is when patients stop responding to therapies that they are normally responsive to (eg, topical steroids). 

With the recent increase in methicillin-resistant S. aureus (MRSA), treatment of a secondary infection of eczema with these organisms can be tricky. Patients with eczema and secondary bacterial skin infections should be treated with topical steroids or other anti-inflammatory medications and moisturizers to repair the skin barrier. The level of skin colonization with S. aureus is decreased with use of these agents alone. Topical or systemic antibiotics appropriate for specific or community-based sensitivities may be needed in severe infections.

Because of the damaged protective skin function, cutaneous inoculation of herpes simplex virus (HSV) can occur. Eczema herpeticum, or HSV-associated Kaposi varicelliform eruption, describes eczema secondarily infected with HSV (type 1 or type 2). The eczema may become more erythematous; then, vesicles develop that are arranged in a grouped pattern. Accompanying symptoms include fever, malaise, and lymphadenopathy. The condition can be diagnosed by a Tzanck smear (seeking multinucleated giant cells), a fluorescent antibody smear, or culture of a vesicular lesion. Patients with eczema herpeticum should be treated with acyclovir. More severe involvement may require hospitalization and use of systemic antivirals. In addition, topical steroids and moisturizers should be continued to repair the skin barrier. 

Children with eczema are more likely than adults to acquire molluscum contagiosum infection, and the disease tends to be widespread. The lesions are generally smooth papules, sometimes with umbilicated skin. The lesions can spread by auto-inoculation to surrounding areas. Molluscum dermatitis accompanies 10% of molluscum lesions, and the dermatitis can be difficult to distinguish from eczema lesions. Untreated, molluscum lesions may resolve on their own; if necessary, the lesions can be treated with cantharidin, liquid nitrogen, or curettage. 

Molluscum dermatitis is treated with topical steroids. Early recognition of infections associated with a diagnosis of eczema is critical for timely initiation of appropriate treatment.
 

Brian S. Kim, MD, Associate Professor, Department of Medicine, Division of Dermatology, Washington University School of Medicine, St. Louis, Missouri

Brian S. Kim, MD, has disclosed no relevant financial relationships.

This patient has atopic dermatitis (AD), but on the basis of the image and description above, by no means would this be an intuitive diagnosis; the findings are not characteristic of those in younger patients with AD. Further, clinicians might find it difficult to diagnose AD in an older patient because older patients generally tend to have more comorbidities and medication side effects, including chronic pruritus of unknown origin and xerosis, which could confound the diagnosis. 

Finally, specific guidelines are lacking for clinicians to distinguish AD from other pruritic skin conditions in the older patient. Currently, according to one report, older patients are diagnosed with AD after at least 6 months of symptom assessment and exclusion of other conditions, including cutaneous T-cell lymphoma, allergic contact dermatitis, psoriasis, drug reactions, and chronic idiopathic or secondary erythroderma.

AD arising de novo in older persons is a discrete form of the disease that characteristically involves the face, neck, trunk, and hands, while sparing the flexural areas, which are prominently involved in younger patients. The eczema can become erythrodermic. Older men are affected threefold more often than older women. 

Skin manifestations in older patients with AD generally match those of adolescents and young adults with AD, but the reverse sign of lichenified eczema around unaffected folds of the elbows and knees is more common than the classic sign of localized lichenified eczema at those folds. 

Factors rendering older people susceptible to AD include innate physiologic changes of aging, notably a decline in skin barrier function, dysregulation of innate immune cells, and skewing of adaptive immunity to a Th2 response.

Much about how to best treat AD in older patients remains unclear. It is a challenge to treat older patients according to standardized guidelines for general AD treatment because dermatologists and others need to consider comorbidities and the medications that these patients might already be taking. Some examples: Dermatologists might limit cyclosporine use in patients with hypertension and reduced kidney function, or limit systemic steroid use in patients with osteoporosis. Older patients have a greater propensity for infection, which might cause dermatologists to limit systemic immunosuppressant drugs. And skin thinning and diffuse photoaging might cause doctors to limit even topical steroid treatment in these patients.

As in other age groups, regular application of moisturizers in combination with calcineurin inhibitors, adjunctive administration of oral antihistamines and avoidance of exacerbating factors comprise basic treatments for AD in older patients. 

Although antihistamines such as hydroxyzine can work for itching in some individuals, they are generally lacking in efficacy in most patients with AD.

Brian S. Kim, MD, is Associate Professor, Department of Medicine, Division of Dermatology, Washington University School of Medicine, St. Louis, Missouri

Brian S. Kim, MD, has disclosed no relevant financial relationships.

This patient has atopic dermatitis (AD), but on the basis of the image and description above, by no means would this be an intuitive diagnosis; the findings are not characteristic of those in younger patients with AD. Further, clinicians might find it difficult to diagnose AD in an older patient because older patients generally tend to have more comorbidities and medication side effects, including chronic pruritus of unknown origin and xerosis, which could confound the diagnosis. 

Finally, specific guidelines are lacking for clinicians to distinguish AD from other pruritic skin conditions in the older patient. Currently, according to one report, older patients are diagnosed with AD after at least 6 months of symptom assessment and exclusion of other conditions, including cutaneous T-cell lymphoma, allergic contact dermatitis, psoriasis, drug reactions, and chronic idiopathic or secondary erythroderma.

AD arising de novo in older persons is a discrete form of the disease that characteristically involves the face, neck, trunk, and hands, while sparing the flexural areas, which are prominently involved in younger patients. The eczema can become erythrodermic. Older men are affected threefold more often than older women. 

Skin manifestations in older patients with AD generally match those of adolescents and young adults with AD, but the reverse sign of lichenified eczema around unaffected folds of the elbows and knees is more common than the classic sign of localized lichenified eczema at those folds. 

Factors rendering older people susceptible to AD include innate physiologic changes of aging, notably a decline in skin barrier function, dysregulation of innate immune cells, and skewing of adaptive immunity to a Th2 response.

Much about how to best treat AD in older patients remains unclear. It is a challenge to treat older patients according to standardized guidelines for general AD treatment because dermatologists and others need to consider comorbidities and the medications that these patients might already be taking. Some examples: Dermatologists might limit cyclosporine use in patients with hypertension and reduced kidney function, or limit systemic steroid use in patients with osteoporosis. Older patients have a greater propensity for infection, which might cause dermatologists to limit systemic immunosuppressant drugs. And skin thinning and diffuse photoaging might cause doctors to limit even topical steroid treatment in these patients.

As in other age groups, regular application of moisturizers in combination with calcineurin inhibitors, adjunctive administration of oral antihistamines and avoidance of exacerbating factors comprise basic treatments for AD in older patients. 

Although antihistamines such as hydroxyzine can work for itching in some individuals, they are generally lacking in efficacy in most patients with AD.

Brian S. Kim, MD, is Associate Professor, Department of Medicine, Division of Dermatology, Washington University School of Medicine, St. Louis, Missouri

Brian S. Kim, MD, has disclosed no relevant financial relationships.

This patient has atopic dermatitis (AD), but on the basis of the image and description above, by no means would this be an intuitive diagnosis; the findings are not characteristic of those in younger patients with AD. Further, clinicians might find it difficult to diagnose AD in an older patient because older patients generally tend to have more comorbidities and medication side effects, including chronic pruritus of unknown origin and xerosis, which could confound the diagnosis. 

Finally, specific guidelines are lacking for clinicians to distinguish AD from other pruritic skin conditions in the older patient. Currently, according to one report, older patients are diagnosed with AD after at least 6 months of symptom assessment and exclusion of other conditions, including cutaneous T-cell lymphoma, allergic contact dermatitis, psoriasis, drug reactions, and chronic idiopathic or secondary erythroderma.

AD arising de novo in older persons is a discrete form of the disease that characteristically involves the face, neck, trunk, and hands, while sparing the flexural areas, which are prominently involved in younger patients. The eczema can become erythrodermic. Older men are affected threefold more often than older women. 

Skin manifestations in older patients with AD generally match those of adolescents and young adults with AD, but the reverse sign of lichenified eczema around unaffected folds of the elbows and knees is more common than the classic sign of localized lichenified eczema at those folds. 

Factors rendering older people susceptible to AD include innate physiologic changes of aging, notably a decline in skin barrier function, dysregulation of innate immune cells, and skewing of adaptive immunity to a Th2 response.

Much about how to best treat AD in older patients remains unclear. It is a challenge to treat older patients according to standardized guidelines for general AD treatment because dermatologists and others need to consider comorbidities and the medications that these patients might already be taking. Some examples: Dermatologists might limit cyclosporine use in patients with hypertension and reduced kidney function, or limit systemic steroid use in patients with osteoporosis. Older patients have a greater propensity for infection, which might cause dermatologists to limit systemic immunosuppressant drugs. And skin thinning and diffuse photoaging might cause doctors to limit even topical steroid treatment in these patients.

As in other age groups, regular application of moisturizers in combination with calcineurin inhibitors, adjunctive administration of oral antihistamines and avoidance of exacerbating factors comprise basic treatments for AD in older patients. 

Although antihistamines such as hydroxyzine can work for itching in some individuals, they are generally lacking in efficacy in most patients with AD.

Brian S. Kim, MD, is Associate Professor, Department of Medicine, Division of Dermatology, Washington University School of Medicine, St. Louis, Missouri

Brian S. Kim, MD, has disclosed no relevant financial relationships.