Breast

• mammary fibroma
  17 July

  Fibroma is a benign tumor that develops from connective tissues.

• mammary conjunctive tumors
  17 July

  Examples
  mammary fibroma
  mammary fibromatosis
  mammary sarcomas
  See also
  mammary conjunctive tumors mammary conjunctive tumors

• benign proliferative disease
  7 May

  Three common pathologies and often mixed in an individual case:
  usual epithelial hyperplasia (UEH)
  apocrine metaplasia
  apocrine adenosis
  columnar cell change
  They may all show a continuous spectrum of abnormalities from benign through atypical to in situ carcinoma.
  usual epithelial hyperplasia (UEH)
  intraduct benign epithelial proliferation
  epithelial and myoepithelial cells proliferate together
  Therefore mixed pattern seen on CK 5/6 or P63 immunostaining
  Streaming (...)

• infarcted mammary papilloma
  6 May

  Examples
  infarcted mammary papilloma https://twitter.com/MBBS_Pathology/status/1124697841950240768
  See also
  infarcted tissue / inferction
  mammary papilloma

• mammary sclerozing anomalies
  18 February

  mammary sclerozing lesions
  Examples
  sclerozing adenosis
  radial sclerozing lesion / radial scar
  See also
  sclerozing anomalies / sclerozing lesions
  sclerosis / fibrosis

• mammary fusiform cell tumors
  20 August 2018

  Examples
  mammary myofibroblastoma
  mammary fibromatosis : not circumscribed, more diffuse fibrosis and no thick bands of collagen
  mammary low-grade myofibroblastic sarcoma : marked cellular pleomorphism, infiltrating margins and high mitotic rate
  mammary myoepithelioma : S100+, keratin+
  mammary nodular fasciitis : more infiltrative, mucoid stroma
  phyllode tumors
  mammary sarcomas
  See also
  mammary tumors
  fusiform cell (...)

• mucin producing mammary carcinomas
  30 May 2018

  Types
  columnar cell mucinous carcinoma
  cystadenocarcinoma
  ductal carcinoma NOS with focal mucin production
  lobular carcinoma (rarely, Pathol Int 2009;59:405)
  metastatic tumors, include GI and chordoma (APMIS 2006;114:726)
  mucinous carcinoma / colloid carcinoma
  mucinous cystadenocarcinoma
  mucoepidermoid carcinoma
  neuroendocrine carcinoma (Am J Surg Pathol 1991;15:677)
  signet ring carcinoma
  See also
  mucin producing tumors
  mammary (...)

• mammary carcinoma with medullary features
  14 May 2018

  Carcinoma with medullary features (CMF) of the breast
  |PO|
  Definition: Carcinoma with medullary features (CMF) includes :
  mammary medullary carcinoma
  atypical medullary carcinoma
  invasive carcinoma, no special type (NST) with features of pushing borders, syncytial growth, high grade nuclei and prominent lymphoid infiltrate.
  WHO Classification of Tumors of the Breast (2013) recommends using the term Carcinoma with medullary features (CMF) rather than medullary carcinoma or (...)

• myospherulosis
  5 January 2018

  myospherulosis of the breast; mammary myospherulosis
  Myospherulosis of the breast is a reactive process of RBCs with substances such as traumatized adipose tissue/fat necrosis. It is seen are spherules with internal dense bodies.
  Images
  Glycophorin IHC stain https://twitter.com/VandaTorousMD/status/949038503152836608
  References
  Cytologic appearance of myospherulosis of the breast diagnosed by fine-needle aspirates: a clinical, cytological and immunocytochemical study of 23 cases. (...)

• Montgomery tubercles
  2 January 2018

  WP
  Definition: The periareolar glands of Montgomery in the breast are also called Montgomery tubercles or Morgagni tubercles. These periareolar glands are small, papular tissue projections at the edge of the areola (nipple).
  Images
  Montgomery tubercles: areolar protuberances. Sebaceous glands NOT associated with a hair follicle. Usually multiple (10-20). https://twitter.com/SGottesmanMD/status/946827984568274944
  Pathology
  A cyst of Montgomery is a benign breast mass, usually (...)

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