Figure 1

Intralobular distribution of ovalian-like stroma (OLS). (A–D) Mucinous cystic neoplasm (MCN) case 1. (A) MCN cyst (*) and intralobularly distributed OLS. (B) Higher magnification of the square region of 1A. (C) ER positivity in OLS. (D) PgR positivity in OLS. 1E-H. MCN case 4. (E) MCN cyst (*) and intralobularly distributed OLS. (F) Higher magnification of the square region of (E). (G) ER positivity in OLS. (H) PgR positivity in OLS. Arrow heads in (B–D) and (F–H) show intralobular OLS. (C, G) Immunohistochemistry for ER. (D, H) Immunohistochemistry for PgR.