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TINEA CORPORIS, CRURIS & PEDIS
Dermatophytoses are superficial fungal infections that have different presentations and are named based on location.
Tinea corporis (ringworm) usually presents with lesions of varying sizes, degree of inflammation and depth of involvement found on the trunk, extremities or face excluding the beard area in men.
Tinea cruris (jock itch) are lesions found on the groin. It may affect the proximal medial thighs and extend to the buttocks and abdomen. The scrotum and penis tend to be unaffected.
The red scaling lesions with raised borders have pustules and vesicles at the active edge of infected area.
Tinea pedis (athlete's foot) are lesions found in the interdigital spaces (most common), sole of foot, and sides of feet.

Introduction

  • Dermatophytoses are superficial fungal infections that have different presentations & are named based on location
    • Usually w/ epidermal involvement
    • Affect healthy individuals but unusual or extensive presentations may indicate an underlying immunologic problem

Signs and Symptoms

Tinea Corporis (Ringworm)

  • Patient usually presents w/ lesions of varying size, degree of inflammation & depth of involvement found on the trunk, extremities or face excluding the beard area in men
  • Lesions are characterized as single or multiple, round or oval, & scaly that have central clearing & elevated reddened edges
  • Lesions have sharp, serpiginous, annular, and very irregular borders w/ a polycyclic pattern
    • Papules or pustules may be present on the border 
  • Pruritus may or may not be present
  • Most common organisms: Microsporum canis, Trichophyton mentagrophytes & Trichophyton rubrum

Tinea Cruris (Jock Itch)

  • Lesions found on the groin; may affect the proximal medial thighs & extend to the buttocks & abdomen
    • Scrotum & penis tend to be unaffected
  • More common in men than women w/ risk factors including obesity & immunodeficiency
  • Red scaling lesions w/ raised borders have pustules & vesicles at the active edge of infected area
    • Maceration is usually present
  • Patients usually complain of burning & itching
  • Feet may also be affected & become the source of the infection as tinea pedis & tinea cruris have the same causative agents
    • Recurrent tinea cruris may be prevented by treating the concomitant tinea pedis infection & other dermatophyte infections

Tinea Pedis (Athlete’s Foot)

  • Interdigital
    • Most common form of tinea pedis
    • Maceration, fissuring & scaling of the interdigital spaces of the 4th & 5th toes
    • Patient usually complains of itching or burning that is most intense when shoes & socks are removed
  • Plantar hyperkeratotic or Moccasin Type
    • Sole of foot is typically covered w/ a fine silvery scale
    • Skin is pink, tender & pruritic
    • Disease takes a chronic course & is resistant to treatment
    • Usually caused by T rubrum & sometimes T mentagrophytes
  • Vesicular or vesiculobullous type
    • Least common form; primarily on the sides of the feet
    • May mimic acute contact dermatitis but the latter does not affect intertriginous areas
    • Usually caused by T mentagrophytes
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