Lymph nodes

• nodal infarction
  24 October

  completely infarcted lymph node
  Definition : A completely infarcted lymph node should alert the pathologist to the high possibility of malignant lymphoma.
  Etiology
  EBV-associated lymphoproliferation infectious mononucleosis (#15157051#) PTLD
  malignant lymphomas (#19305448#)
  granulocytic sarcoma (#14678023#)

• nodal infectious mononucleosis
  24 October

  Lymph node lesions in infectious mononucleosis (IM) show a marked histological diversity and may occasionally be confused with malignant lymphoma.
  The lymph node lesion of infectious mononucleosis (IM) shows marked histologic diversity and occasionally may be confused with malignant lymphoma.
  Synopsis
  geographic nodal necrosis / geographic lymph node necrosis The necrotic area can comprised 50% or more of a cervical lymph node.
  angiocentric lymphoproliferative lesions
  numerous (...)

• massive nodal necrosis
  21 October

  Massive necrosis of the lymph nodes
  Definition : Massive necrosis of the lymph nodes is uncommon and may be induced by obstruction of the blood flow ( nodal infarction ).
  This lesion is characterized by diffuse coagulation necrosis with loss of cell nuclei but, early on, with well preserved cell outlines. Caseous necrosis is also an uncommon lesion but can be produced by infection with tuberculosis organisms and fungi in nonhuman primates. It can also be seen in the centers of rapidly (...)

• nodal lymphoid depletion
  21 October

  Definition : Nodal lymphoid depletion or atrophy is the sequela to chronic necrosis or apoptosis. It can occur in any lymph node and there can be differences in the presence and severity of lymphoid depletion between lymph nodes in the same animal.
  Lymphoid depletion is typically characterized by a decrease in the number and size of follicles with few to no germinal centers and/or depletion of paracortical lymphocytes.
  With a depletion of paracortical lymphocytes, the stromal cells and (...)

• dermatopathic lymphadenitis
  16 August

  Examples
  dermatopathic adenopathy : paracortical hyperplasia https://twitter.com/HemepathUAMS/status/764185252826800128

• dermatopathic lymphadenitis
  27 July

  Dermatopathic lymphadenopathy; Dermatopathic Lymphadenopathy; Lipomelanotic reticuloendothelial cell hyperplasia PO
  Definition : Regional lymph node enlargement with a distinctive reactive process that is characterized by paracortical hyperplasia composed of interdigitating dendritic cells, Langerhans cells, macrophages containing melanin pigment, and small T-cells, due to chronic inflammatory skin disease.
  Examples
  dermatopathic adenopathy : paracortical hyperplasia (...)

• nodal involvement of clear cell hidradenoma
  12 January

  Paywall references
  https://pubmed.ncbi.nlm.nih.gov/33464750/
  https://pubmed.ncbi.nlm.nih.gov/27080562/

• Rosai–Dorfman disease
  13 October 2021

  Images
  Rosai–Dorfman disease https://twitter.com/DrAlodaini/status/1447622077767430154

• nodal granular histiocytes
  13 October 2021

  granular histiocytes in lymph nodes
  Etiology granular histiocytes in hip replacement / arthroplasty effect : metallosis also occurs at sites away from the THA, esp. in lymph nodes. The debris may be metal and/or polyethylene
  Images in soft tissues https://twitter.com/ScottBikeethan/status/1447878727023607808 in lymph nodes https://twitter.com/Chucktowndoc/status/1244662167762276352

• mature B-cell lymphomas
  4 February 2021

  Mature B cell neoplasms
  Subtypes
  Small B cell lymphomas with a circulating component: CLL / SLL Richter syndrome (pending) B cell monoclonal lymphocytosis prolymphocytic leukemia hairy cell leukemia hairy cell leukemia variant splenic B cell leukemia / lymphoma, unclassifiable (pending) splenic diffuse red pulp
  Small B cell lymphomas with lymphoplasmacytic differentiation / marginal zone lymphomas: lymphoplasmacytic lymphoma marginal zone-general MALT-marginal zone marginal zone-nodal (...)

0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | ... | 180