Case Report. Widespread tinea corporis due to Trichophyton rubrum.

We report the case of a 36-year-old man who presented large erythematous plaques involving the trunk, face and extremities, since one month. Some of these lesions had a psoriasis-like aspect, with abundant superficial scaling. Direct microscopic examination of scales removed from the plaques revealed numerous hyphae. Cultural examination lead to the identification of Trichophyton rubrum species. Our case of tinea corporis presented some peculiarities related both to the extension of the lesions and their clinical aspects.

Case report. Rosacea-like Tinea incognito.

We report a case of dermatophytosis of the face due to Microsporum canis that was exacerbated and altered clinically by a long-term application of topical corticosteroids. We considered this case a rosacea-like tinea incognito of the beard area.

Case report. Tinea corporis due to Microsporum canis in a professional cyclist.

We report the case of a 20-year-old man, a professional cyclist, with multiple scaling plaques on his limbs that had been present for 40 days. Our case of tinea corporis presented some peculiarities related to the aetiological agent Microsporum canis and also its mode of transmission.

Case report. Erythrasmoid pityriasis versicolor.

A 50-year-old Caucasian man with pityriasis versicolor that was localized almost exclusively in the inguinal folds and was characterized by lesions clinically superimposable on those of erythrasma is described. Due to these clinical characteristics, it is proposed that this variety of pityriasis versicolor is defined as 'erythrasmoid'.

Case report. Tinea corporis purpurea.

We report a case of tinea corporis purpurea localized to a calf in a 36-year-old woman. The patient, who was also affected by mild superficial venous insufficiency of lower limbs, complained of intense pruritus. Microsporum canis was the aetiological agent. Clinically atypical varieties of tinea corporis were sometimes reported in the literature, particularly in HIV-positive patients, although they are uncommon in immunocompetent patients; in particular, tinea corporis purpurea is very rare.

Erythema elevatum diutinum and HIV infection: a report of five cases.

Erythema elevatum diutinum (EED) is emerging as a specific HIV-associated dermatosis, 11 cases having so far been reported in the medical literature and five patients with the disease having been seen by us during the last 4 years. As the disease is poorly known, it is easily confused with Kaposi's sarcoma or bacillary angiomatosis, but the histopathological features are diagnostic. EED is considered to be an immune complex-mediated vasculitis. A streptococcal infection seemed to be the trigger factor in four of our patients. Partial control of the cutaneous lesions was achieved by the use of antibiotics.

Cutaneous myiasis caused by Dermatobia hominis.

We report a case of myiasis caused by larvae of Dermatobia hominis in a 12-year-old boy. The infestation was acquired in Uruguay and was characterized by a single, large, inflammatory, nodular lesion located on the scalp. The lesion was accompanied by local pruritus and pain as well as diffuse headache and regional lymphadenopathy. From the lesion a single larva in stage III, of noteworthy size, was removed. Very few pediatric cases of myiasis due to D. hominis have been reported in the literature. Furthermore, as far as we know, just one adult case of myiasis caused by D. hominis acquired in Uruguay has been published.

Photofibrosis: a further histopathological change induced by PUVA therapy via the mast cell in guttate psoriasis. Preliminary report.

Twenty-five psoriatic patients were studied histologically before and after PUVA therapy in order to delineate the relationship between dermal mast cells, psoriasis healing process and collagen changes. A number of mast cells were found in the psoriatic changes. A number of mast cells were found in the psoriatic lesion both before PUVA and also after PUVA therapy in 22 of the 25 patients. Fibrosis of the papillary dermis and upper reticular dermis was found in 3 cases. Increased collagen deposition and increased numbers of fibroblasts were accompanied by verticalization of ectatic and elongated blood vessels, with an overall pattern of relatively recent scarring. Mast cells were no longer detectable in the fibrosis area. We cannot exclude the possibility that PUVA therapy exerts a further stimulus on mast cell histamine and heparin degranulation in this type of psoriasis, thus leading to dermal fibrosis and blood vessel neogenesis.