Erythema ab igne

Source: Wikipedia, the free encyclopedia.
Not to be confused with miliaria.
Erythema ab igne
Other namesFire stains,[1] laptop thigh, granny's tartan, Koruda erythema, toasted skin syndrome[1]
Erythema ab igne in a person with chronic abdominal pain who found some relief from the application of heat.
SpecialtyDermatology

Erythema ab igne (

pigmentation
is seen, it can go unnoticed.

Causes

Reticulated, interlacing, hyperpigmented patches with a few, scattered, erythematous macules at junctions on the medial aspects of the lower legs

Different types of heat sources can cause this condition such as:

  • Repeated application of hot water bottles, heating blankets, or heat pads to treat chronic pain—e.g., chronic back pain.[4]
  • Repeated exposure to heated car seats, space heaters, or fireplaces. Repeated or prolonged exposure to a heater is a common cause of this condition in elderly individuals.
  • Occupational hazards of silversmiths and jewelers (face exposed to heat), bakers, and chefs (arms, face)
  • Resting a laptop computer on the thigh (laptop computer-induced erythema ab igne). In a 2012 review, Riahi and Cohen describe the characteristics of laptop computer-induced erythema ab igne.[5] Temperatures between 43 and 47 °C can cause this skin condition; modern laptops can generate temperatures in this range. Indeed, laptops with powerful processors can reach temperatures of 50 °C and be associated with burns. Positioning the laptop on the thighs can allow for direct exposure to the heating elements of the laptop, which include the central processing unit (CPU) and the graphics processing unit (GPU).[5] At least 15 cases have been reported by 2012 with the condition usually affecting the left anterior thigh.[5] In these reports, 9 of the 15 patients were women (60%) with an average age of 25 years at diagnosis.
  • In Kashmir, due to the use of a kanger which also causes kangri cancer.
  • It is a classic finding in chronic pancreatitis and may also be seen in people with hypothyroidism or lymphedema

Pathogenesis

The pathogenesis of erythema ab igne remains unknown. It has been proposed that thermal radiation exposure can induce damage to superficial blood vessels that subsequently leads to epidermal vascular dilation. The dilation of vessels presents morphologically as the initially observed erythema.

papillary dermis
)—results in the net-like pattern of erythema ab igne skin lesions.

Diagnosis

Differential diagnosis

Treatment

Discontinuing contact with the heat source is the initial treatment of erythema ab igne.

5-fluorouracil cream has been recommended.[medical citation needed] Abnormally pigmented skin may persist for years. Treatment with topical tretinoin or laser treatment may improve the appearance.[medical citation needed
]

Epidemiology

Erythema ab igne was once commonly seen in the

electronic devices
.

References

  1. ^
    ISBN 978-1-4160-2999-1
    .
  2. S2CID 40827390
    .
  3. S2CID 30189490
    .
  4. ^ a b c "What Caused This Hyperpigmented Reticulated Rash On This Man's Back?". The Dermatologist. Jan 14, 2013.
  5. ^
    PMID 22747929
    . Retrieved 21 January 2013.
  6. PMID 11216204
    .

External links
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