Intermittent Soft-Tissue Tumor Enlargement in Episodic Angioedema With Eosinophilia Syndrome

Episodic hypereosinophilia and angioedema syndrome, also known as Gleich syndrome, is a rare entity characterized by recurrent episodes of eosinophilia, angioedema, urticaria, fever and weight gain with spontaneous resolution. It is classified as an idiopathic hypereosinophilic syndrome. Unlike other hypereosinophilic syndromes, it has a low risk for internal organ damage. We report the case of a 42-year-old male with a 28-year history of recurrent erythematous wheals and plaques and persistent hypereosinophilia. Physical examination revealed a well-defined subcutaneous nodule on his right lower limb that increased in size with each episode of angioedema. Histopathology evidenced a lipoma with intense eosinophil infiltration within the mature adipose tissue, while the specimen of the wheal revealed scarce perivascular and interstitial eosinophilic inflammatory infiltrate. Diagnosis of episodic angioedema with eosinophilia syndrome was made based on clinical and laboratory findings.