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Tibial lymphoplasmacytic plaque (TLP) is a recently recognized clinicopathological entity affecting children and is characterized by a linear, reddish brown plaque on the leg with a dense dermal lymphoplasmacytic infiltrate. No effective treatments are available for this lesion of unknown etiology and its course is chronic. We report a new case in which, for the first time, a causative factor (insect bite) is strongly suspected. The clinical and pathological features of TLP may be misleading for the uninformed dermatologist or pathologist. Therefore, we would like to draw attention to this very distinctive clinicopathological presentation in order to help them recognize it easily and prevent it from being misdiagnosed as an infectious disease or, above all, a cutaneous lymphoma. We will discuss the relationship between TLP and linear acral pseudolymphomatous angiokeratoma of children, a variant of pseudolymphoma localized on acral sites in children which may share some of TLP's histopathological features., (Copyright © 2012 S. Karger AG, Basel.)

A patient with an ulcerated cutaneous leishmaniasis of the pinna had suppurative otochondritis after a first unsuccessful course of treatment with meglumine antimoniate. Although the Leishmania ulceration healed after a second course of meglumine antimoniate, and despite three oral dicloxacillin or pristinamycin courses, the otochondritis extended and an abscess developed. Pus from the abscess revealed a pure culture of Pseudomonas aeruginosa. Five days of oral ciprofloxacin plus rifampin led to a marked improvement. The P. aeruginosa isolate was sensitive to ciprofloxacin but fully resistant to rifampin. Healing with minimal mutilation was obtained at the end of a six-week course of multiple antibiotic therapy. Pseudomonas aeruginosa otochondritis was a co-factor of cartilage mutilation in this patient. Thus, infection with P. aeruginosa should be promptly treated when present in tender cutaneous or mucosal leishmaniasis lesions near cartilaginous areas.

Background: Primitive cutaneous neuroendocrine carcinoma or Merkel cell carcinoma is a rare tumor. It may be large since diagnosis is frequently delayed. The usual treatment is extensive surgical removal and radiotherapy., Patients and Methods: A 69-year-old woman presented with a large Merkel cell carcinoma of the right leg. MRI showed a tumor invading the deep layers together with several satellite lesions. There was no regional nodal or visceral metastasis. Regional chemotherapy involving isolated limb perfusion with melphalan was performed in order to avoid amputation. Complete response was achieved a few months later and continues 5 and a half years later with minor sequelae comprising cutaneous sclerosis, pigmentation and mild ankle stiffness., Discussion: Only five cases of Merkel cell carcinoma treated with isolated limb perfusion are reported in the literature: four of these involved local relapse and one was a primary tumor with regional lymph node involvement. Only one patient was still in complete remission 18 months after treatment. Isolated limb perfusion chemotherapy could thus be indicated in the treatment of advanced Merkel cell carcinoma of a limb in the absence of bone or regional lymph node involvement.

Introduction: Perianal abcess and fistula-in-ano are particular when happening in infants of less than 1 year of age. A congenital abnormality of crypts of Morgagni may be at the origin of the disease. There is no evidence for predisposing condition at this age., Case Report: A 7-week-old boy had a painful swollen perianal lesion suggesting the presence of perianal abcess. Biological tests did not show any neutropenia nor inflammatory syndrome. The infant was admitted to the surgical center to undergo a perianal abcess drainage. During the intervention, no fistula was found. No recurrence was observed., Discussion: Perianal abcess and/or fistula-in-ano are relatively common conditions in infants of less than 1 year of age. This disease is suspected to originate from anal cryptitis, which will later form a perianal abcess. Androgen excess during the foetal stage could be the cause of the formation of abnormal crypts of Morgagni, which encourages cryptitis and abcess formation. In childhood some predisposing factors can exist, as immunodeficiency or colopathy. On the opposite, a predisposing condition is rare in infancy. Twenty-eight to 85 per cent of infants with perianal abcess may progress to form a fistula. The usual treatment of perianal abcess is incision and drainage; it may be completed by fistulotomy or fistulectomy. The antibiotherapy is not systematic. The identification of the corresponding crypt may be important to avoid recurrence. On the opposite, a recent prospective study proposes a non operative management of perianal abcess and fistula-in-ano in healthy infants.