Treatment of telangiectasia macularis eruptiva perstans with montelukast.

controls. An endoscopy study was performed showing contractions on the medium and distal third of oesophagus like a bamboo joint and the histological study showed up to nine eosinophils in the oesophageal mucosa. Although clinical symptoms and macroscopic images from the endoscopic study suggested an eosinophilic oesophagitis, the number of eosinophils was not diagnostic. However, some authors suggest that a number of 7–20 eosinophils in oesophagic mucosa could be a probable eosinophilic oesophagitis. The fact that the Shiitake is not a frequent food and that the patient refused to eat it due to the symptoms could be responsible for the microscopic findings. Moreover, as there is not a commercial extract available for this mushroom, prick-to-prick has to be done and a homemade extract has been obtained from Shiitake showing specific positive results in in vitro tests supporting the in vivo test findings. We describe a case of food allergy manifested as oesophageal symptoms due to Shiitake mushroom. Moreover, in vitro tests such as BATand HRTusing home-made extract is a useful technique to diagnose food allergy.