Cases reported "pityriasis"

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1/58. Pityriasis amiantacea.

    Pityriasis amiantacea is an easily recognizable cutaneous disease that is characterized by scaling of the scalp and temporary alopecia. The scaling, described as thick and asbestos-like, binds down tufts of hair. The alopecia may be temporary or scarring. Despite a well-established clinical description, no definitive etiology has been uncovered. This disease may represent seborrheic dermatitis, superficial fungal or pyogenic infections, lichen planus, or psoriasis. Histologically, the disease is characterized by eczematous features. We report a case of pityriasis amiantacea in an 11-year-old girl with simultaneous findings of psoriasis as well as review the literature on the etiology of this disease. ( info)

2/58. Pityriasis amiantacea: a report of two cases in adults.

    Pityriasis amiantacea is a scaly condition of the scalp that is usually seen in children. It is most often associated with an underlying primary dermatosis. We describe two adult patients who did not present with concomitant scalp or cutaneous diseases. ( info)

3/58. case reports. Pityriasis amiantacea as manifestation of tinea capitis due to microsporum canis.

    We report three patients, two infants and an adult, in whom their tinea capitis clinically appeared as pityriasis amiantacea. The mycological studies showed infection due to microsporum canis in all cases. Correct diagnosis as well as adequate antimycotic chemotherapy of this atypical manifestation of tinea capitis remain a challenge to the clinician. Epidemiological aspects must be regarded also. ( info)

4/58. Pityriasis rotunda mimicking tinea cruris/corporis and erythrasma in an Indian patient.

    Pityriasis rotunda is a rare disease characterized by perfectly round to oval, sharply defined, scaly, hypo/hyperpigmented patches of variable number and size located mainly over the trunk and proximal extremities. More than 95% of the reported cases in medical literature are from three countries/ethnic populations, namely japan, south africa (Bantu), and italy (Sardinian islanders). To the best of my knowledge, no patient with the characteristic clinico-pathologic features has been reported from the Indian subcontinent. I report a 44-year-old man with eighteen pityriasis rotunda patches, persistent for nearly 20 years. The lesions in the groin and axillae closely resembled erythrasma and tinea, and he had received treatment for these conditions several times in the past. Histopathology of the skin biopsy showed thinning of the epidermis with a thinned-out granular layer and a sparse lymphomononuclear infiltrate in the dermis. A review of literature suggests that there are two subsets of the disease. The type I subset is comprised of pityriasis rotunda associated with systemic illness and is seen in Black or Oriental patients with no family history of the disease. The lesions tend to subside on treatment of the underlying illness. The type II subset patients are Caucasians as well as Blacks and Orientals with no underlying systemic illness. Familial occurrence is possible; lesions tend to be persistent and unresponsive to therapy. ( info)

5/58. Case report. Pityriasis versicolor mimicking Pityriasis rotunda.

    Pityriasis versicolor is a common dermatomycosis, occurring throughout the world, characterized by irregular, slightly scaly patches, varying in color from red/light brown to white. Pityriasis rotunda, on the other hand, is an uncommon disease, reported in specific ethnic groups, and characterized by perfectly round or oval patches of varying color, with a scaly surface. The histologic pattern is that of ichthyosis vulgaris. We report here the case of a male patient, aged 31, from Sardinia (italy), affected by Pityriasis versicolor mimicking Pityriasis rotunda. Mycological examination allowed us to formulate the correct diagnosis, and ensuing treatment with antifungal drugs was entirely successful. The authors, while pointing out the rarity of this case, stress the possibility that Pityriasis versicolor mimics Pityriasis rotunda and vice-versa, especially in those countries in which the two diseases are endemic. More widespread recourse to microscopic examination can help avoid the risk of mistaken diagnosis and consequent incorrect treatment. ( info)

6/58. Pityriasis alba in a psoriatic location.

    Three patients with pityriasis alba whose lesions were confined to the knees only are reported. Such cases can be misdiagnosed as psoriasis. The key to the correct diagnosis lies in the physician's awareness of the existence of this variant of pityriasis alba. ( info)

7/58. hiv seropositivity in association with pityriasis lichenoides et varioliformis acuta.

    We describe a case of PLEVA in an asymptomatic, human immunodeficiency virus (HIV) positive patient. This association has not been previously described. The possible mechanisms involved are discussed. ( info)

8/58. Pityriasis versicolor on the groin mimicking erythrasma.

    Pityriasis versicolor (PV) is a widespread dermatomycosis caused by yeasts. erythrasma is a superficial bacterial skin disease affecting the major folds of the body, particularly the groin. We report the case of a 45-year-old man, affected by PV, exclusively localized in the inguinal folds and in the inner surface of the thighs, characterized by lesions clinically reproducing erythrasma. The authors underline the possibility that PV mimics erythrasma and vice versa, especially in those countries in which both diseases are quite common, and stress the importance of performing a simple mycological examination to avoid gross diagnostic and therapeutic errors. ( info)

9/58. Atypical manifestations of pityriasis lichenoides chronica: development into paraneoplasia and non-Hodgkin lymphomas of the skin.

    Three patients with atypical courses and manifestations of pityriasis lichenoides chronica (PLC) are presented. The first patient is a 21-year-old white woman who showed a good response of her PLC lesions as well as her reactive oligoarthritis to repeated PUVA treatments combined with oral prednisone during 1 year. The effect of the treatment then decreased. The patient developed a low-grade malignant lymphoma of the lung. When the lymphoma of the lung improved after chemotherapy, the PLC eruptions improved, too. The second patient is a 41-year-old man, whose Hodgkin's disease stage IVa was successfully treated by chemotherapy and radiotherapy in 1984. In 1987 he showed PLC lesions which responded well to puva therapy, later also in combination with etretinate. Until 1988 repeated skin biopsies revealed a non-specific eczematous pattern. In 1989 the recalcitrant PLC eruptions finally revealed a pleomorphic non-Hodgkin lymphoma of the skin with medium-sized cells. The third patient had a PLC for about 9 years when Hodgkin's disease stage Ia was diagnosed. At the beginning the skin biopsy showed an eczematous pattern, but 2 years later, in 1990, skin infiltrations of a large-cell, anaplastic non-Hodgkin lymphoma were seen. These cases show that PLC in rare cases may either represent a paraneoplastic skin disease or may itself develop into cutaneous lymphomas. ( info)

10/58. Progressive and extensive hypomelanosis and extensive pityriasis alba: same disease, different names?

    We report the cases of five female patients with high skin phototype affected by relapsing, hypochromic, non-scaling macules occurring after the summer on the back and spreading over large areas of skin. Histological features disclosed decreased epidermal melanin. Psoralen plus ultraviolet A (PUVA) treatment proved to be beneficial, but new relapses were noted after stopping treatment. Clinical and histological features were consistent with the diagnosis of 'progressive and extensive hypomelanosis' described by Guillet in persons of mixed racial background. We discuss the differential diagnosis of the latter entity with respect to the other idiopathic acquired primitive hypomelanosis and hypothesize an overlapping with the so-called extensive pityriasis alba (EPA). ( info)
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