Ductal Carcinoma in Situ of the Breast
Variant: Ductal Carcinoma In Situ Associated with Mucocele-like Lesion
Diagnostic Criteria
- Typical DCIS with duct rupture and pools of mucin spilled into stroma
- Must not have cells floating in mucin
- Distinguish from following
- Invasive mucinous carcinoma has mucin in contact with stroma with cells floating in mucin
- Mucinous DCIS has extracellular mucin but spaces are all lined by epithelium
- No mucin in contact with stroma
- Mucocele-like lesion (NOS) lacks DCIS component
