Yogesh Devaraj, Shaik Mohammed Obeidullah, Mukunda Ranga Swaroop, Jnanashree Gowda A, Greeshma Jagadish, Namratha Govindaraju

DERMOSCOPIC PATTERNS OF FACIAL MELANOSIS - A CROSS SECTIONAL STUDY

  • General Medicine
  • General Earth and Planetary Sciences
  • General Environmental Science
  • General Medicine
  • Ocean Engineering
  • General Medicine
  • General Medicine
  • General Medicine
  • General Medicine
  • General Earth and Planetary Sciences
  • General Environmental Science
  • General Medicine
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Introduction: Facial melanosis is a group of heterogenous entities, having a common clinical feature of altered pigmentation over face. They cause cosmetic disfigurement which often leads to significant psychosocial consequences. Dermoscopy is a noninvasive diagnostic technique for in- vivo observation of pigmented skin lesions, allowing better visualization of surface and sub surface structures which are not visible to the naked eye. In this study we aim to determine the Dermoscopic patterns of facial melanosis. Patients presenting to Dermatology out-patie Methods: nt Department over a period of 18 months with facial hyperpigmentation meeting the defined inclusion and exclusion criteria were enrolled in this cross-sectional, descriptive study. A detailed clinical history was taken and clinical examination of the lesions was done and recorded in a pre-structured proforma. Dermoscopic examination was performed using a Dermatoscope with a magnification of 10x. Clinical and dermoscopic features of these facial melanosis were photographically recorded and correlated. A total of 200 patients of facial melanosis Results: were included in the study. Majority of the patients (70.5%) belonged to age group of 20-40 years. Females outnumbered males with a ratio of 4.7: 1.0. Melasma was the most common facial melanosis seen in 110 (55%), followed by periorbital hyperpigmentation and freckles. On Dermoscopic examination, melasma showed reticular pattern, freckles showed reticular pattern with moth eaten border, accentuated pigment network was found in lentigines, lichen planus pigmentosus revealed hem-like pattern and bluish grey granules, Reihl's melanosis showed reticular and pattern perifollicular whitish halo, exogenous ochronosis had arciform structures and obliteration of follicles, acanthosis nigricans showed linear crista cutis and sulcus cutis. This study was useful in delineating various Conclusion: clinical and dermoscopic patterns of facial melanosis. Understanding the distinct dermoscopic patterns of different facial melanosis helps in increasing the diagnostic accuracy, obviating the need for invasive procedures like skin biopsy.

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