Home   Chapter Home   Jobs   Conferences   Fellowships   Books


Breast malignant, males, children

Carcinoma subtypes

Glycogen rich (clear cell) carcinoma

Reviewer: Monika Roychowdhury, M.D., (see Reviewers page)
Revised: 10 October 2012, last major update August 2012
Copyright: (c) 2001-2012, PathologyOutlines.com, Inc.


● Breast carcinoma in which at least 90% of the neoplastic cells have abundant clear cytoplasm due to glycogen
● First described in 1981 (Cancer 1981;48:2003)
● Rare, 1-3% of breast carcinomas
● May be a variant of apocrine carcinoma


● Prognosis similar to invasive ductal carcinoma (Am J Surg Pathol 1995;19:904)

Radiology images

Mammogram shows circumscribed mass

Case reports

● 33 year old woman whose tumor had neuroendocrine features (Pathologica 2001;93:676)
● 45 year old woman with solid papillary tumor (J Clin Pathol 2003;56:552)
● 55 year old woman (Case Rep Oncol 2011;4:452)
● 59 year old woman (World J Surg Oncol 2008;6:44)
● 61 year old woman (Arch Med Lab Pathol 2003;127:1629)
● Intraductal lipid rich carcinoma with component of glycogen rich carcinoma (J Breast Cancer 2012;15:135)

Gross images

Solid papillary pattern within cystically dilated duct (Fig 1A)

Micro description

● Solid or solid / papillary patterns of large clear cells with distinct cell borders containing glycogen in 90% or more cells
● Often associated with intraductal component of varied type
● Often has apocrine features
● Cells have clear to granular cytoplasm
● May have scant intracellular mucin (Histopathology 1987;11:857)
● No cytoplasmic vacuoles

Micro images

Various images

Intraductal lipid-rich carcinoma with component of glycogen-rich carcinoma

Tumor cells with distinct borders and clear cytoplasm

Resembles renal clear cell carcinoma

Tumor cells contain abundant cytoplasmic glycogen

Fig 1/2: Infiltrating nests of atypical cells with abundant clear cytoplasm
Fig 3: PAS+ granules
Fig 4: PAS staining is removed by diastase

Polygonal cells with distinct cell borders,
clear cytoplasm and prominent nucleoli (Fig 1B/1C)


AFIP images:

Sheets of polygonal cells with distinct borders, clear cytoplasm and
small nuclei, also lymphocytes and plasma cells (arrows)

Clear cells surround a small group of tumor cells with amphophilic cytoplasm

PAS+ dark granules are due to glycogen, and are abolished by diastase

Cytology description

● Hypercellular with tumor cells in loosely cohesive syncytial groups and some single cells
● Most tumor cells have abundant, finely granular eosinophilic cytoplasm or foamy to clear cytoplasm with well defined cytoplasmic membranes and moderate/marked nuclear pleomorphism with central round/oval nuclei containing prominent nucleoli (Acta Cytol 2008;52:65)
● PAS staining may be helpful (J Med Invest 2002;49:193)

Positive stains

● PAS-diastase sensitive (glycogen)

Negative stains

● CK20, lipid stains (done on fresh/frozen tissue)

Electron microscopic description

● Non-membrane bound glycogen and empty glycogen lakes
● Tight junctions between tumor cells, immature desmosomes, occasional short microvilli (Am J Surg Pathol 1986;10:553)

Differential diagnosis

Apocrine carcinoma
Clear cell “sugar” tumor: positive for melanocytic markers (Am J Surg Pathol 2002;26:670)
Lipid-rich carcinoma: positive for lipid stains, negative for glycogen
● Myoepithelial lesions
Secretory carcinoma: younger patients, low grade histology

Additional references

Hum Pathol 1991;22:81, Stanford University

End of Breast malignant, males, children > Carcinoma subtypes > Glycogen rich (clear cell) carcinoma

This information is intended for physicians and related personnel, who understand that medical information is often imperfect, and must be interpreted in the context of a patient's clinical data using reasonable medical judgment. This website should not be used as a substitute for the advice of a licensed physician.

All information on this website is protected by copyright of PathologyOutlines.com, Inc. Information from third parties may also be protected by copyright. Please contact us at copyrightPathOut@gmail.com with any questions (click here for other contact information).