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Clinicopathologic study on pityriasis alba.

R F Martín1, A Lugo-Somolinos, J L Sánchez

  • 1Department of Dermatology, University of Puerto Rico, School of Medicine, San Juan 00936-5067.

Boletin De La Asociacion Medica De Puerto Rico
|October 1, 1990
PubMed
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Pityriasis alba (PA), a common skin condition in children, presents as hypopigmented macules. This study details its occurrence, typical locations, and characteristic histologic findings in affected individuals.

Area of Science:

  • Dermatology
  • Pediatric Dermatology
  • Dermatopathology

Background:

  • Pityriasis alba (PA) is a common, benign skin condition primarily affecting children and young adults.
  • It is characterized by superficial, hypopigmented macules, often presenting on the face and extremities.
  • Understanding the clinicopathologic features of PA is crucial for accurate diagnosis and management.

Purpose of the Study:

  • To conduct a clinicopathologic study of pityriasis alba.
  • To investigate the demographic distribution, clinical presentation, and histologic characteristics of PA.
  • To correlate clinical observations with histopathological findings in patients with pityriasis alba.

Main Methods:

  • A clinicopathologic study was performed on patients diagnosed with pityriasis alba.

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  • Data collection included patient demographics, personal history of atopy, and lesion location.
  • Histologic evaluation of skin biopsy specimens was conducted to identify characteristic pathological changes.

    • Main Results:

    • Pityriasis alba occurred more frequently in preadolescent children, with equal incidence in both sexes.
    • A predominance of white patients was observed compared to black patients.
    • Lesions most commonly affected the arms and face, followed by legs and trunk; spongiosis and superficial perivascular lymphocytic infiltrate were consistent histologic findings.

    Conclusions:

    • Pityriasis alba is a common pediatric dermatosis with specific demographic and clinical patterns.
    • Histopathological examination reveals characteristic epidermal and dermal changes, aiding in diagnosis.
    • The findings underscore the importance of clinicopathologic correlation for understanding pityriasis alba.