Luna stain: a simple and cost-effective diagnostic tool helps in detecting eosinophilic granules deposition of flame figures and aids in diagnosing eosinophilic cellulitis "Wells Syndrome".

We report a rare case of Wells syndrome in which a 61-year-old Caucasian male presented with three distinct skin lesions including a cutaneous bulla, an erythematous plaque, and a linear streak located on the patient's left anterior thigh, left dorsal wrist, and left anterior forearm, respectively. Histologic examination revealed diffuse and interstitial eosinophilic infiltrate admixed with lymphocytes and macrophages that predominantly involve the dermis. Nodular aggregates of eosinophils surrounding dermal collagen fibers suggestive of 'flame figures' were identified. Luna histochemical stain was used and highlighted the deposition of eosinophilic granules over the collagen bundles confirming the presence of flame figures. Laboratory workup revealed peripheral eosinophilia, but a comprehensive clinical evaluation failed to reveal a systemic disease and ultimately the diagnosis of eosinophilic cellulitis 'Wells Syndrome' was rendered. After a short course of immunosuppressive therapy, the patient experienced a complete resolution of the skin lesions on his last follow-up visit several weeks from the initial diagnosis. This case highlights the various clinical forms that Wells syndrome may present with and may serve as a good example for the use of Luna stain as a simple and cost-effective diagnostic tool that can help to arrive at the accurate diagnosis and inform therapy.

Cyclosporine-induced Erythromelalgia.

Erythromelalgia is a neurovascular disorder which causes pain, swelling, erythema, and warmth of the distal extremities. Primary disease is due to a genetic mutation in the SCN9A gene, but secondary erythromelalgia can be the consequence of a variety of underlying etiologies, including drug and toxin exposures. The disease is rare, occurring in only 1.3 out of every 100,000 in the United States, and symptoms can vary significantly in severity and presentation. Therefore, it can be difficult to recognize the disorder, identify the source, and promptly treat the condition. We report a reversible cause of erythromelalgia induced by the use of oral cyclosporine. This correlation is poorly documented in literature, with limited accounts identifying an association between erythromelalgia and cyclosporine. As drug-induced erythromelalgia represents a reversible cause of disease, physicians should obtain a detailed medication history during the diagnostic workup, specifically inquiring about the use of cyclosporine.

Glatiramer acetate-induced lobular panniculitis and skin necrosis.

Glatiramer acetate (GA) is a drug that commonly is used for the treatment of relapsing-remitting multiple sclerosis (RRMS). Although it typically is known as a safe and effective therapy, a number of adverse effects associated with GA have been reported in the literature. Local injection-site reactions (LISRs) and mild systemic symptoms are among the most commonly described adverse effects. A review of the literature revealed limited reports of panniculitis as an adverse effect of GA injection and even fewer describing associated skin necrosis. We report a case of GA-induced panniculitis and skin necrosis and discuss the occurrence of panniculitis, necrosis, and lipoatrophy following GA injections.

Urticarial vasculitis: a unique presentation.

Urticarial vasculitis is a relatively rare diagnosis in a patient presenting with urticaria. The process is classically described as a generalized eruption, painful more so than pruritic, lasting longer than 24 hours. Two forms of urticarial vasculitis have been described: ahypocomplementemic form more commonly associated with systemic disease, and a normocomplementemic form that is generally limited to the skin. We report on a uniquely distributed vasculitic eruption restricted mainly to the anterior belt line area in a patient presenting with urticaria and intense pruritus. Urticarial vasculitis as a unique entity is reviewed along with its clinical and histopathologic presentation and the pharmacologic agents used for treatment.