33 Special Types of Invasive Breast Carcinoma: Diagnostic Criteria ...

43. Green I, McCormick B, Cranor M, et al. A comparateve study of pure tubular
and tubulolobular carcinoma of breast. Am J Surg Pathol 1997;21:653-657
44. Wheeler DT, Tai LH, Bratthauer GL, et al. Tubulolobular carcinoma of breast.
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Case 4:
History: 57 y/o female with palpable breast mass. Patient was participating in
the breast cancer awareness month function when she examined her own
breasts and noticed the left breast mass. Mammogram found 2 cm suspicious
mass at 5 o'clock position of the left breast
Submitted diagnosis: Invasive mucinous carcinoma, "pure” (welldifferentiated
invasive breast carcinoma, overall mBR grade 1; nuclear grade 1,
tubular grade “1", mitotic grade 1).
MUCINOUS CARCINOMA
Background: Mucinous carcinoma contains large amounts of extracellular epithelial
mucin, sufficient to be visible grossly, and recognizable microscopically surrounding
and, sometimes, within tumor cells. These tumors have blunt, rather irregular borders.
Mucin can be found in most carcinomas of the breast, but the term mucinous
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