“…4 The subepithelial MS cells in all patients in the current study showed moderate to strong reactivities to ER stains, while all but one patient showed mild to strong reactions to PR stains (Table 2), as consistent with previous reports. 9,10 Although non-specific cytologic findings were briefly mentioned in two reports of HBC, 11,12 to the best of our knowledge, the cytomorphology of HBC with or without MS has not yet been thoroughly described. Upon aspiration, cytologic analysis of the fluid consistently exhibited chronic inflammatory exudate with large numbers of neutrophils, lymphocytes, and macrophages along with a few groups of non-atypical, often degenerated, cuboidal to columnar epithelial cells in a hypocellular pattern, which occasionally were arranged in papillary clusters.…”