Rectum

• rectal inflammatory polyp
  2 September

  Types
  rectal plasmacytic polyp
  See also
  rectal anomalies
  plasmacytic polyp plasmacytic anomalies

• tumoral infiltration of the mesorectum
  25 March 2017

  tumor spread in the mesorectum
  The 1-cm distal margin recommended in patients with low rectal carcinoma could be reduced with insurance to obtain a negative distal margin.
  The knowledge of preferential localization of mesorectal metastatic lymph nodes (MLNs) and mesorectal extranodal cancer tissue (EX) would help the pathologist to improve patient’s lymph node staging.
  Paywall references
  Distal intramural and tumor spread in the mesorectum after neoadjuvant radiochemotherapy in rectal (...)

• mesorectum
  25 March 2017

  Pathology
  tumoral infiltration of the mesorectum tumor spread in the mesorectum

• rectal leiomyosarcoma
  27 September 2016

  Images
  Rectal leiomyosarcoma. More pleomorphic than GIST. Desmin+ Dog1- https://twitter.com/AnnieMeares/status/765288940114849792
  See also
  leiomyosarcomas digestive leiomyosarcoma

• solitary rectal ulcer
  19 September 2016

  Solitary rectal ulcer syndrome; SRUS PO
  Differential diagnosis
  Cowden disease (similar histology, different clinical features)
  Crohn disease
  mucinous adenocarcinoma irregular mucin pools, epithelium floating in mucin, complex glandular proliferation, variable atypia, desmoplasia, usually no hemorrhage
  rectal endometriosis
  ulcerative rectitis / ulcerative proctitis
  ulcers due to ergotamine (...)

• sexually transmitted rectitis
  19 September 2016

  Sexually transmitted proctitis
  Sexually transmitted infections such as chlamydia, gonorrhoea, herpes simplex virus and syphilis commonly present with rectal symptoms.
  Recent outbreaks of lymphogranuloma venereum among homosexual men throughout Europe highlight the need to consider sexually transmitted infections in the differential diagnosis of proctitis.
  See also
  infectious rectitis / infectious proctitis
  Open references
  Sexually transmitted proctitis.
  Hamlyn E, Taylor C. (...)

• rectal metastasis of an endometrial adenocarcinoma
  22 June 2016

  Images
  rectal metastasis of an endometrial adenocarcinoma https://twitter.com/dbabu51/status/714261109658624000
  See also
  rectal metastasis
  endometrial adenocarcinoma

• rectal gastric heterotopia
  6 April 2016

  Images https://twitter.com/Hopkins_GI_Path/status/683316636905009153
  See also
  gastric heterotopia

• protectomy
  1 April 2015

  Synonym(s): rectectomy. [proct- + G. ektomē, excision]
  Definition: Surgical resection of the rectum.

• rectal neuroendocrine tumor
  27 March 2015

  According to the 2010 World Health Organization classification, all gastrointestinal neuroendocrine tumors (NETs) are classified as malignant except for L-cell-type (glucagon-like peptide [GLP] and peptide YY [PYY]-producing) NETs.
  Non-L-cell immunophenotype and large tumor size are associated with increased tumor grading and staging, concurrently indicating that they are independently poor prognostic indicators in rectal NET patients. Therefore, combining L-cell phenotype and tumor size (...)

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