A Rare Case of IgG4-Related Disease Causing Inflammatory Breast Mass Successfully Treated with Anti-CD20 Biological Therapy: A Discussion of Clinical Case with Literature Review.

Abstract

Consider inflammatory conditions including IgG4-related disease in the differential diagnosis of lumps including breast masses.IgG4 disease is a rare condition but can have complex clinical course and significant complications that need a low threshold of suspicion in terms of diagnosis.Occasionally, a repeat study and re-reading of histopathological specimen with appropriate immunostaining can open the way for accurate diagnosis in challenging cases with an unreached diagnosis.