G. Tumoral pathology

• alveolar rhabdomyosarcoma
  25 November 2003

  Images
  Alveolar rhabdomyosarcoma.
  https://twitter.com/histiocytosisX/status/699599913013923840
  https://twitter.com/seattlequinns/status/855202143564742656
  ARMS : focal desmin w/ diffuse myogenin in A-RMS (PCR + PAX3-FOXO1)
  https://twitter.com/histiocytosisX/status/730475540524699649
  Compact ARMS : Alveolar rhabdomyosarcoma may lack alveolar spaces. Solid nodules uniform round cells,fibrous septa. DIFFUSE myogenin.
  https://twitter.com/JMGardnerMD/status/856870953011347456 (...)

• paraganglioma
  20 November 2003

  extra-adrenal pheochromocytomas, phaeochromocytomas; paragangliomas PO
  Definition: Paragangliomas arise in specialized neural crest cells associated with segmental or collateral autonomic ganglia throughout the body.
  Images
  Vagus Paraganglioma https://twitter.com/DanglisFotiosMD/status/742304089908903936
  Paraganglioma https://twitter.com/raghupillappa/status/816372158066728960
  retroperitoneal (...)

• malignant rhabdoid tumor
  20 November 2003

  rhabdoid tumor, MRT

• clear cell sarcoma of soft tissue
  15 November 2003

  soft parts melanoma, melanoma of soft parts, clear cell sarcoma of tendons and aponeuroses, clear cell sarcoma of soft tissues
  Digital cases
  Case 206 (HPC:206) : Clear cell sarcoma of soft parts
  Case 218 (HPC:218) : Clear cell sarcoma of soft parts
  Images
  Clear cell sarcoma of soft tissue
  https://twitter.com/histiocytosisX/status/724990958383824896
  https://twitter.com/smlungpathguy/status/858052954716286976
  Definition: Clear cell sarcoma is now included under the uncertain (...)

• growth patterns
  13 November 2003

  Types
  solid pattern
  trabecular pattern
  acinar pattern
  papillary pattern
  plexiform pattern
  See also
  architectural patterns

• tumoral cell appearance
  12 November 2003

  tumoral cell types
  Semiology
  small cells : small cell tumors / small cell carcinomas
  tumoral round cells : round cell tumors
  small round cell tumors / tumoral small blue cells / small blue cell tumors
  large round cell tumors
  tumoral fusiform cells : furisform cell tumors / spindle cell tumors
  tumoral rhabdoid cells : rhabdoid cell tumors / rhabdoid tumors
  tumoral signet-ring cells : signet ring cell tumors
  tumoral oncocytic cells / oncocytes / Hürtle cell : oncocytic (...)

• signet-ring cells
  12 November 2003

  Signet-ring Cell change
  Etiology
  signet-ring cell change
  digestive mucosal injury
  pseudomembranous colitis
  signet-ring cell tumors
  signet-ring cell carcinomas
  signet-ring cell melanoma
  signet-ring cell lymphoma
  Images
  digestive mucosal injury leads to slough of benign mucinous cells. Beware of signet ring cell change in benign polyps, stomach, and pseudomembranous colitis
  https://twitter.com/RhondaYantiss/status/876834829794455552
  Signet-ring Cell Change in (...)

• carcinomas
  12 November 2003

  carcinoma
  Classification
  adenocarcinomas salivary carcinomas
  squamous cell carcinomas
  urothelial carcinoma
  endocrine carcinomas
  renal cell carcinomas
  bronchioloalveolar carcinoma
  undifferentiated carcinomas / anaplastic carcinomas
  Phenotypes
  adenocarcinomas
  squamous cell carcinoma
  urothelial carcinoma
  small cell carcinomas
  clear cell carcinomas
  marge cell carcinomas
  oncocytic carcinomas
  carcinosarcomas / carcinosarcoma (...)

• mesothelial tumors
  30 October 2003

  mesothelial tumours (tumors of the serosal membranes)
  See also
  serosal membranes
  References
  The 2015 World Health Organization Classification of Tumors of the Pleura: Advances since the 2004 Classification. Galateau-Salle F, Churg A, Roggli V, Travis WD; World Health Organization Committee for Tumors of the Pleura. J Thorac Oncol. 2016 Feb;11(2):142-54. doi:10.1016/j.jtho.2015.11.005 . PMID: (...)

• synovial tumors
  30 October 2003

  Examples
  lipoma arborescens
  synovial chondromatosis
  synovial hemangioma
  giant cell tumor of tendon sheath tenosynovial giant cell tumor, localized type (nodular tenosynovitis ) tenosynovial giant cell tumor, diffuse type (pigmented villonodular synovitis ) malignant giant cell tumor of the tendon sheath
  synovialosarcoma
  See also
  synovium synovial pathology synovial (...)

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