Structural and ultrastructural study in an isolated case of pili annulati

L. Brambilla, V. Boneschi, G. Chiappino, L. Bruognolo, F. Sala, G. L. Tadini

Research output: Contribution to journalArticlepeer-review


A case of pili annulati in an eighteen year old woman is described. The hairs show bright spots along hair shafts when viewed in daylight. The transmission and scanning electron microscopy confirmed that the bright spots are due to small cavities into the cortex. The plasmatic measurement of copper, zinc and of the most important hormone, such as the dosage of plasmatic, urinary and hair amino acids, allowed the Authors to exclude any influence of metabolic systemic alterations on the pathogenesis of pili annulati. Neither cutaneous nor internal anomalies were detected.

Original languageEnglish
Pages (from-to)383-387
Number of pages5
JournalGiornale Italiano di Dermatologia e Venereologia
Issue number9
Publication statusPublished - 1990

ASJC Scopus subject areas

  • Dermatology


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