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Prolonged abdominal heat application in an individual with diabetes and gastroparesis leads to the development of erythema ab igne. Practitioners should be aware of the various ways that erythema ab igne can present.1
Erythema ab igne is due to prolonged heat exposure (43–47°C) which causes damage to superficial vascular plexus leading to vasodilation, erythema and haemosiderin deposition which clinically appears as hyperpigmentation.2
A 28-year-old man with type 1 diabetes and gastroparesis had presented with vomiting and abdominal pain. Abdominal examination revealed a erythematous, reticulated, macular and non blanchable pigmentation, (figure 1). The patient used to apply hot water bottles for abdominal pain relief.
Important differentials include other reticulated conditions such as livedo reticularis and livedoid vasculitis, cutis marmorata, poikiloderma atrophicans vasculare and cutaneous T-cell lymphoma.
Management is mainly removing the heat source. 5-fluorouracil is recommended if the lesion shows precancerous changes and can help clear epithelial atypia. Topical tretinoin or laser is advocated for improving skin pigmentation.4 5
Biopsy of the lesion was not performed in the patient as it was clear that the lesion was due to application of heat source as the lesion started to fade during the patient’s hospital stay.6 Biopsy is usually recommended to rule out cancer if lesions are not fading after the removal of heat source.7
Erythema ab igne indicates the severity of the underlying cause for example, pain thereby leading to prolonged heat application.
Practitioners need to be aware of the different ways of presentation of erythema ab igne.
Contributors RR is the sole author of this manuscript.
Competing interests None declared.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
Author note A young patient hadpresented with abdominal pain and vomiting in the evening. He was a type 1 diabetic with gastroparesis. On admission, high glucose levels were noted and he was treated overnight with variable rate insulin infusion to control his glucose levels as he was unable to eat due to his vomiting and abdominal pain.When he was seen by the on-call medical consultant, he was found to be lying in bed in a curled up position and with his hand on his abdomen. Examination of his abdomen revealed erythema ab igne lesion and the patient informed that hehad been using hot water bottles/bags to relieve himself of his pain. An erythema ab igne lesions are usually found in elderly. Patients who often sitnear the fire during winter time to keep themselves warn, this lesion presenting in a young man with diabetic gastroparesis was striking which indicated the severity of the pain secondary to gatroparesis. A quick literature search did not reveal any gastroparetic patient presenting with this type of lesion, although an astute physician can make a diagnosis of hypothyroidism when such lesion presents in the shin area of hypothyroid patients due to theirproximity to heating devices to keep themselves warm. It was felt that this would be a good pictorial case presentation for general physicians so that they can be aware of the different ways of presentation of erythema ab igne. Also the lesion can also be precancerous and is one of the differentials.
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