It is more common in warm humid environments and may be seasonal. Pityriasis versicolor is a superficial fungal infection of the skin produced by lipophilic dimorphic fungi belonging to the genus malassezia spp, which form part of the normal skin flora. Identification of malassezia species isolated from patients with. Mar 31, 2016 pitiriasis versicolor luz marina miranda frias 2. Jun 26, 2015 pityriasis versicolor is a common skin rash in puberty and early adult life but can occur in infants. Pityriasis versicolor is one of the most frequent fungal cutaneous infections. Pityriasis versicolor epidemiology bmj best practice.
Apr 18, 2018 pityriasis rosea is a rash that usually begins as a large circular or oval spot on your chest, abdomen or back. Although the organism is a saprophytic yeast that is part of the normal skin flora, a number of favorable conditions may trigger its conversion to the mycelial or hyphal form that is associated with clinical disease, including. The severity of the infection depends on the type of agent, environmental factors, and the host immunologic status. A clinical and epidemiological study of pityriasis versicolor srirath m kambil associate professor, department of dermatology, kannur medical college, anjarakandy, kannur, kerala, india to the mycelial phase pseudofilamentous parasitic form. Pitiriasis versicolor con maculas eritematosas en tronco fuente. Most people with this condition are concerned about the appearance of the rash. Often has a relapsing nature requiring frequent treatm. Pityriasis versicolor pv is a common superficial fungal infection caused by yeasts of the genus malassezia. In clinical terms, it generally presents on the trunk as round or oval macules that vary in color from hypopigmentation to blackish. Pitiriasis versicolor causas, sintomas, tratamiento y fotos. The superficial mycoses include those that superficially infect skin or hair fig. It is a superficial mycosis characterized by welldefined, slightly scaly skin lesions of variable color. A superficial fungal infection of the stratum corneum, due to dimorphic yeasts of the genus, leading to hypo or hyperpigmented macular lesions on seborrheic areas of the trunk.
Pityriasis versicolor is a rash caused by a yeastlike germ. The genus malassezia comprises lipophilic yeasts belonging to the normal cutaneous microbiota of humans and warmblooded animals, 16 and can be cultured from almost all body areas. Scaly, hypopigmented macules of pityriasis versicolor on the chest of a child. Patients with this disorder often present with hypopigmented, hyperpigmented, or erythematous macules on the trunk and proximal upper extremities picture 1ae. In patients with a predisposition, tinea versicolor may chronically recur. Dermatophytoses are infections caused by keratinophilic fungi known as dermatophytes. Pityriasis versicolor is a common skin rash in puberty and early adult life but can occur in infants. Eruption is most common in the summer months in adolescents. Several steps are required for infection to take place. Pityriasis versicolor differentials bmj best practice. Tinea versicolor is a common, benign, superficial cutaneous fungal infection usually characterized by hypopigmented or hyperpigmented macules and patches on the chest and the back. Only globous unicellular units pityrosporum orbiculare were seen outside the active lesions and in. Pityriasis versicolor primary care dermatology society uk. Certain environmental, genetic, and immunological factors can predispose to this pathogenic conversion and contribute to the.
Diagnosis is based on clinical appearance and potassium hydroxide wet mount of skin s. But it can lead to emotional distress or selfconsciousness. Tinea versicolor ie, pityriasis versicolor is a common superficial fungal infection. The epidermis may show mild hyperkeratosis and acanthosis figure 2. A clinical and epidemiological study of pityriasis versicolor. Elongation of the rete ridges and mild increased basal layer pigmentation as seen in acanthosis nigricans can sometimes be observed. Tinea versicolor, tinea nigra, white piedra, and black.
This fungus is part of the normal skin flora but can cause disease when it converts to its pathogenic hyphal form. Conoce las diferencias entre pitiriasis versicolor vs vitiligo. Tinea versicolor or pityriasis versicolor is a common superficial cutaneous fungal infection characterized by pityriasiform desquamation and hypopigmented or hyperpigmented macules formation, primarily located on the chest and back with tendency to spread. Tinea versicolor due to malassezia furfur phil 2914 lores. Pdf pathogenesis of dermatophytosis and tinea versicolor. Unlike other disorders utilizing the term tinea eg, tinea pedis, tinea capitis, tinea versicolor is not a dermatophyte infection. Pitiriasis versicolor por malassezia ovalis springerlink. Pityriasis versicolor is a common superficial infection of the skin caused by the yeast malassezia furfur also known as pityrosporum ovale or pityrosporum orbiculare. However, they may become pathogenic under certain conditions and are associated with a broad spectrum of clinical infections as pityriasis versicolor pv, folliculitis, seborrheic dermatitis, some forms of atopic.
Pitiriasis versicolor farmacia profesional elsevier. Pityriasis versicolor definition of pityriasis versicolor. It is not harmful or passed on through touching contagious. P a c ie n t e s c o n s o s p e c h a d e p it ir ia s is v e r s ic o lo r c u a d r o c lin ic o, h is to r ic o, to p o g r a fia y m o r fo lo g ia. Pityriasis versicolor pv is an infection caused by various species of malassezia yeast. Called a herald patch, this spot can be up to 4 inches 10 centimeters across. Sometimes it may cause minor symptoms such as scaling, itch or irritation. Tinea versicolor pityriasis versicolor is a superficial mycosis caused by various yeasts and lipophilic fungi of the genus malassezia, with three dominant species.
Antifungal treatment for pityriasis versicolor article pdf available in journal of fungi open access mycology journal 11. Under certain conditions, both exogenous and endogenous, the fungus can convert from a yeast to a pathogenic mycelial form. It is caused by malassezia, a lipophilic dimorphic fungus. Age rare in childhood, becomes commoner in the late teens with a peak in the early 20s. Clipping is a handy way to collect important slides you want to go back to later. The rash often has an insidious onset and it may take months, or a sunny holiday, before it becomes noticed by the patient. Tinea versicolor is characterized by the presence of fine scaly patches pityriasis or macules, which may be hypochromic or hyperchromic versicolor, that are generally located on the. Pityriasis versicolor is a common superficial fungal infection of the skin. Pityriasis versicolor pv is a cutaneous pigmentation disorder caused by a lipophilic yeast of the genus malassezia sp. Tinea versicolor, which is also called pityriasis versicolor, is not painful or contagious. In a randomly collected series of 175 cases of pityriasis versicolor in residents of the centralnorthern part of venezuela, % of the patients were infected with ovoid unicellular units of the causal fungus malassezia ovalis and 87% with globous unicellular units in the scales m. Tinea versicolor is skin infection with malassezia furfur that manifests as multiple asymptomatic scaly patches varying in color from white to tan to brown to pink.
Now customize the name of a clipboard to store your clips. A superficial fungal infection of the stratum corneum, due to dimorphic yeasts of the genus, leading to hypo or hyperpigmented macular lesions on seborrhoeic areas of the trunk. Diagnosis is based on clinical appearance and potassium hydroxide wet mount of skin scrapings. Some people who are prone to this condition need regular treatment to prevent the rash from coming back recurring. Sun exposure may make tinea versicolor more apparent. Often has a relapsing nature requiring frequent treatme. Unlike other disorders utilizing the term tinea eg, tinea pedis, tinea capitis, tinea. It is essential for dermatologists to recognize it and offer an appropriate treatment. Objective to determine the efficacy of topical or systemic agents in the treatment and prevention of pityriasis versicolor. The low power view of pityriasis versicolor is suggestive of a mild superficial perivascular inflammation pattern figure 1.
Malassezia furfur tinea versicolor, pityriasis versicolor infection of the skin causes hypopigmented or hyperpigmented macular lesions along the trunk of the body. Data sources the cochrane skin group specialized register to june 2008, cochrane central register of controlled. Tinea versicolor tineeuh vursikulur occurs most frequently in teens and young adults. Sciencedirect is a registered trademark of elsevier. Pityriasis versicolor is a common infection of the skin caused by the yeast pityrosporum ovale. Pathogenesis of dermatophytosis and tinea versicolor. Of the species described, those most frequently producing symptoms are m. Tinea versicolor dermatologic disorders msd manual. Pityriasis versicolor is een onschuldige oppervlakkige huidinfectie. The herald patch is typically followed by smaller spots that sweep out from the middle of your body in a shape that resembles drooping pinetree branches.