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Eosinophilic dermatoses encompass a broad spectrum of diseases of different etiologies hallmarked by eosinophilic infiltration of the skin and/or mucous membranes, with or without associated blood eosinophilia. The wide range of dermatological manifestations of this spectrum, including nodules and plaques, pustules, blisters, ulcers, and urticarial lesions, is reflected in a non-univocal classification system. We identified six groups of eosinophilic dermatoses based on the predominant anatomic level of involvement: (1) epidermal; (2) of the dermal–epidermal junction; (3) dermal; (4) of the hypodermis and muscle fascia; (5) of the pilosebaceous unit; and (6) vascular/perivascular. We review clinicopathologic features and management of diseases belonging to each group, particularly: (1) pemphigus herpetiformis and atopic dermatitis as prototypes of the epidermal group; (2) bullous pemphigoid as prototypic eosinophilic dermatosis of the dermal–epidermal junction; (3) eosinophilic cellulitis (Wells syndrome), hypereosinophilic syndromes, Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) syndrome, eosinophilic dermatosis of hematologic malignancy and chronic spontaneous urticaria as paradigmatic dermal eosinophilic dermatoses; (4) eosinophilic fasciitis as an eosinophilic dermatosis with predominant involvement of the hypodermis and muscle fascia; (5) eosinophilic pustular folliculitis as a model of the pilosebaceous unit involvement; and (6) granuloma faciale, angiolymphoid hyperplasia with eosinophilia, and eosinophilic granulomatosis with polyangiitis, belonging to the vascular/perivascular group. [ABSTRACT FROM AUTHOR]

Eosinophilic annular erythema (EAE) is a rare entity of unknown etiology that is possibly related to a hypersensitivity reaction and presents as annular erythematous plaques with tissue eosinophilia. It is classified as a figurate erythema with a controversial relationship to Wells syndrome (WS) in the literature, where it is generally considered a separate entity or subset based on clinical and histopathologic differences. EAE typically presents with recurrent, erythematous, arcuate, and annular plaques on the trunk and proximal extremities. The course of the disease is often chronic, recurrent, and relapsing. Responses to treatment are variable but are typically best with systemic steroids and antimalarials. We report a patient refractory to other therapies who had a striking response to dapsone. [ABSTRACT FROM AUTHOR]

Objective and design: Asthma is associated with eosinophilic airway inflammation and characterized by enhanced airway sensitivity. Interleukin (IL)-5 plays an important role in the pathogenesis of asthma. The involvement of IL-5 receptor-mediated cellular signals in the pathogenesis of a mite antigen-induced chronic asthma model was investigated. Subjects: In this study, 48 female C57BL/6J (WT) mice and IL-5 receptor-deficient (IL-5RKO) mice were used. Treatment: Mite antigen (50 μl) was intranasally administered 13 times to WT and IL-5RKO mice. Methods: Airway hypersensitivity (Mch PC) and specific antigen exposure tests were performed, and lung tissue, bronchoalveolar lavage fluid (BALF), and blood were collected to investigate the asthma pathology and differences in the local pulmonary levels of cytokines and chemokines. Results: Airway sensitivity was enhanced and antigen-specific airway resistance was increased in WT mice. In addition, the number of eosinophils and Th2 cytokine levels in the BALF were increased. In contrast, IL-5RKO mice did not acquire the asthma pathology, such as antigen-specific airway resistance and eosinophilic airway inflammation. Mch PC was significantly correlated with cysteinyl leukotriene levels in WT mice. Conclusion: These findings suggested that both IL-5 induced eosinophils and cysteinyl leukotrienes are involved in the pathology of this mite antigen-induced chronic asthma model. [ABSTRACT FROM AUTHOR]

Well's syndrome, in many circumstances, is determined by intensive eosinophilic infiltration into dermal layer with the clinical presentation of erythematous and edematous plaques which can easily be remitted by current corticosteroid therapies. Up to now, different etiologies have been proposed governing Well's pathophysiological procedure. Of note, no evidence of seasonal association has been already reported. A 70-years-old afebrile male presented with a chief complaint of 30-years history of cutaneous manifestations along with non-ulcerated edematous, erythematous plaques and patches, and extensive pruritus confined on both dorsal and palmar surface of upper extremities occurred annually in early summer. We hereby report a case in season-dependent of Well's syndrome occurrence. [ABSTRACT FROM AUTHOR]

Wells' syndrome is a multifaceted dermatosis with a wide morphological spectrum, ranging from characteristic cellulitis-like erythema and papula to an unusual presentation of vesicles and pustules. The most important elements for diagnosis are erythemal plaques and histological picture of eosinophilic infiltration of the dermis with 'flame figures' (Plotz et al., in Hautarzt 51:182-186, ). Because of its original description as a distinct entity, it has come to be regarded as an abnormal eosinophilic response to a number of causative agents such as herpes simplex virus 2(HSV-2) and toxocara (Ludwig et al., in J Am Acad Dermatol 48:S60-S61, ; Bassukas et al., in Cases J 1:356, ). Concurrence of WS and malignant diseases as colon cancer, trachea squamous carcinoma, nasopharyngeal carcinoma or angioimmunoblastic lymphadenopathy has been reported (Hirsch et al., in J Dtsch Dermatol Ges 3:530-531, ; Renner et al., in Acta Derm Venereol 87:525-528, ). Autoimmune diseases, including Systemic lupus erythematosus (SLE) are multi-system disorders of unknown cause and are commonly characterized by protean cutaneous manifestations. To date, few autoimmne disease was found associated with WS except four previous reports of Churg-Strauss syndrome (CSS) and one case of ulcerative colitis (Fujimoto et al., in Clin Exp Dermatol, ; Sakaria et al., in J Gastroenterol 42:250-252, ). The coexistence of SLE and WS in one patient was not found in literature and our case is the first. Here we described the rare combination and discussed the treatment strategy for this condition. [ABSTRACT FROM AUTHOR]

Wells' syndrome, also termed eosinophilic cellulitis, is a dermatologic condition of unknown etiology that occurs as recurrent patches or plaques mimicking infectious cellulitis. Histopathology reveals an eosinophilic infiltrate and characteristic flame figures. Previous reports have associated this syndrome with parasitic infections, arthropod bites, pharmacologic agents, surgery, and hematologic disorders. We present a case report of a patient with Wells' syndrome associated with newly diagnosed ulcerative colitis. The dermatosis erupted concurrently with flares of ulcerative colitis. Furthermore, treatment of the ulcerative colitis led to resolution of the skin lesions. To our knowledge this describes the first association between inflammatory bowel disease and Wells' syndrome and argues for a distinct relationship between the two. [ABSTRACT FROM AUTHOR]

The article presents a case study of a child who developed Wells' syndrome or eosinophilic cellulitis on both feet. It describes the clinical presentation of the child. It details his medical history and the laboratory examinations administered to the patient. The article also discusses the diagnosis of eosinophilic cellulitis.