Tinea capitis

Tinea capitis
Incidence:
  • Ringworm of the scalp occurs in children exclusively Mainly due to M. canis or Trichophyton tonsurans
Pathophysiology:
  • It invades the hair cuticle (ectothrix infection), causing pink, scaling patches on the scalp skin
  • Scalp ringworm caused by T. schoenleini, invades the interior of the hair shaft (endothrix) and causes intense inflammation on the scalp, with swelling, pus formation and scalp scarring.
  • Favus: Causes crusting on the surface of the skin, combined with hair loss
Symptoms:
  • There is patchy loss of hair (only broken hair) with variable degrees of inflammation (to differentiate from alopaecia areata - no inflammation and total loss of hair from the root) It is easily spread by the sharing of hairbrushes.
Diagnosis:
  • Infected areas sometimes fluoresce a light green under long-wave UVR (Wood's light)
Exam Question
  • Ringworm of the scalp occurs in children exclusively
  • Mainly due to M. canis or Trichophyton tonsurans
  • It invades the hair cuticle (ectothrix infection), causing pink, scaling patches on the scalp skin
  • Scalp ringworm caused by T. schoenleinii, invades the interior of the hair shaft (endothrix) and causes intense inflammation on the scalp, with swelling, pus formation and scalp scarring.

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