A 2005 case report described an 8-year-old boy who developed systemic anaphylaxis shortly after the ingestion of pancakes prepared with commercial pancake flour.
The patient had positive skin prick test to contaminated pancake flour extract and dust mite, but a negative skin test to uncontaminated pancake flour. There was no response to the main ingredients of the pancake mix. Microscopic examination of the contaminated pancake flour revealed the storage mite Blomia freemani.
The scientific name for "pancake syndrome" is oral mite anaphylaxis.
Mind map: Indoor allergens
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"Watch what you eat. For instance, don’t eat pancakes with mites in them - you could have a bad allergic reaction. When you go to IHOP make sure you ask them to “hold the mites.”
Dust mite allergen avoidance. The main allergen is in the dust mite feces. Use 3 control measures for 3-6 months to see an effect on the allergy symptoms (click to enlarge the image).
Systemic anaphylaxis after the ingestion of pancake contaminated with the storage mite Blomia freemani. Wen DC, Shyur SD, Ho CM, Chiang YC, Huang LH, Lin MT, Yang HC, Liang PH.Ann Allergy Asthma Immunol 2005 Dec;95(6):612-614.
Oral mite anaphylaxis (pancake syndrome) also observed in children. Sánchez-Borges M, Capriles-Hulett A, Caballero-Fonesca F. Ann Allergy Asthma Immunol. 2006 May;96(5):755-6.
Anaphylaxis from ingestion of mites: Pancake anaphylaxis [J Allergy Clin Immunol. 2012] http://buff.ly/VcEthS
Image sources: Heap of pancakes in Sweden; Yellow mite, Wikipedia, public domain.