Fixed food eruption caused by peanut confirmed by open oral food challenge and in vitro cellular testing

Fixed food eruption caused by soy lecithin in a child

“…Fixed drug eruption (FDE) is well known, 1 but only a few cases of fixed food eruption have been described 2‐6 . The diagnosis is based on the temporal relationship between the appearance of typical skin lesions and the exposure to the causative agent 1,7 .…”

“…Fixed eruption (FE) is a characteristic skin reaction that usually appears as a single, round or oval erythematous‐violaceous macule or plaque that typically recurs at the same location after re‐exposure to the trigger 1 . Although it is mainly caused by drugs, 1 it has also been triggered by foods 2‐6 . We present a case of FE in a child, confirmed by local and oral provocation tests.…”

Fixed food eruption caused by Maja squinado (European spider crab) in a child

“…Loli‐Ausejo et al 1 did not perform skin biopsy on account of the possibility of reaching a diagnosis with the history of exposure, OFC, and in vitro cellular testing, in addition to the patient's age. Likewise, we consider that a consistent history and, in absence of systemic symptomatology, positive results for tests like OFC or PT on the affected site provide enough information to accurately diagnose FFE, without needing more invasive techniques.…”

“…Loli‐Ausejo et al 1 recently reported one of the few examples of fixed food eruption (FFE) in children that can be found in the literature. We present a similar case that was referred to our department, which is the first report, to our knowledge, of FFE caused by seafood in children.…”