Cutaneous Toxoplasmosis

Abstract

Nine patients with cutaneous toxoplasmosis had slowly regressing erythema-multiforme-like eruptions or lichenoid, papulonodular and purpurictelangiectatic disorders. The most common histologic finding was subacute histiolymphocytic perivasculitis with frequent demonstration of the parasite. Another group of patients showed similar clinical and histological findings, but the parasite was not evidenced in these.

Pityriasis lichenoides et varioliformis acuta and Acquired Toxoplasmosis

“…In addition, numerous autonom ous skin conditions have been anecdotically as sociated with active toxoplasmosis, namely lichen planus, pityriasis rubra pilaris, pur puric capillaritis, papular acantholytic der matosis, Weber-Christian disease, erythema multiforme [3,4], lichen verrucosus et reticularis of Kaposi [5] and Sweet syn drome [6].…”

Acute Toxoplasmosis Mimicking Melanoma Metastases: Review of Conditions Causing False-Positive Results on ¹⁸F-FDG PET/CT

“…A HIV-positive patient, presenting with hard and painful nodular lesions on the arms, hands and chest, had a negative serology for T. gondii , but the histopathologic examination of the lesion revealed foci of macrophages containing the protozoan parasite T. gondii [10]. In Italy, in 1980, during a period of 3 years Binazzi and Papini [11 ]observed 9 patients with -evidence of trophozoites in skin lesions which presented different nonspecific cutaneous manifestations as ulcerative, purpuric teleangiectatic dermatosis of the lower limbs, relapsing erythema multiforme-like eruptions, erythema anulare centrifigum, lichenoid, lenticular or nummular patches as well as migrant, erysipelas-like edematous, cyanotic dermatitis. The most common manifestation of the acute toxoplasmosis is bilateral, symmetrical, nontender cervical adenopathy, which usually resolves, but in rare cases may persist chronically.…”

Skin Infections

“…766 Maculopapular, hemorrhagic, lichenoid, 767 nodular, granuloma annulare-like 766,768 and dermatomyositis-like lesions 769 have been found concomitantly with acquired T. gondii infections. gondii can cause congenital and acquired infections.…”

“…768 Occasionally, an overlying pseudoepitheliomatous hyperplasia can be found. Parasites are identified in the dermis as cysts of bradyzoites in the dermis or as free tachyzoite forms.…”