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This case was contributed by Dr. Semir Vranic, Clinical Center of the University of Sarajevo, Bosnia).
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CancerTYPE IDs database includes 2,206 tumors from multiple tumor banks, selected to provide broader and deeper representation of the heterogeneity of tumors. The 92-gene assay does not overlap with IHC markers, providing complementary data to standard tumor diagnosis.
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For more information, click here.
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Case #227
Clinical history:
A 60 year old woman with no history of malignancy, kidney disease or other medical disorders presented with a tumor mass in the upper outer quadrant of her left breast, measuring 30 x 25 mm. Previous mammography revealed massive calcification with a benign appearance. A wide excision was performed. Frozen section revealed no definite diagnosis.
Microscopic images:
What is your diagnosis?
Diagnosis: Osseous metaplasia of the breast
Discussion:
The specimen contains well formed bone tissue without associated neoplasia.
Osseous metaplasia is uncommon. It is associated with benign lesions, including cholesterol granuloma (Pathol Res Pract 2008;204:353), fibroadenoma (Radiology 1989;172:671), fasciitis ossificans (Pathol Res Pract 2007;203:737, Arch Pathol Lab Med 2004;128:e29), lipogranuloma (Yonsei Med J 2011;52:373), radiation therapy (Br J Radiol 2002;75:460), saline implants (Plast Reconstr Surg 2001;107:356) and silicone implants (Ann Plast Surg 1998;41:348).
Osseous metaplasia is also associated with metaplastic carcinoma and other invasive subtypes (Breast 2008;17:314, Am J Surg Pathol 2009;33:534) as well as osteosarcoma of the breast (Cases J 2008 Aug 9;1(1):80).
This disorder is benign but it is important to exclude a possible associated malignancy, which may not be evident on a core biopsy.
