Lymphoma & related disorders

Hodgkin lymphoma

Mixed cellularity



Topic Completed: 1 August 2011

Minor changes: 29 December 2020

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PubMed Search: "Mixed cellularity" classic Hodgkin lymphoma

Dragos C. Luca, M.D.
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Cite this page: Luca DC. Mixed cellularity. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/lymphomanonBmixed.html. Accessed December 8th, 2021.
Definition / general
Terminology
  • Includes cases that do not fit in any other category
Epidemiology
  • 20 - 25% of all cases of classic Hodgkin lymphoma in developed countries
  • More frequent in HIV patients and in developing countries (most common subtype)
  • No bimodal age distribution (median age: 38 years)
  • Male predominance (~70% of patients)
Sites
  • Cervical and supraclavicular lymph nodes, peripheral lymph nodes (frequently), spleen (30%), bone marrow (10%), liver (3%), other organs (1 - 3%), mediastinum (uncommon)
Clinical features
  • B symptoms are frequent
  • 50% present as stage III or IV with abdominal lymphonodular or splenic involvement
Treatment
  • Worse prognosis than nodular sclerosis classic Hodgkin lymphoma but better than lymphocyte depleted classic Hodgkin lymphoma (before modern therapy, almost the same with current regimens)
  • Recent studies suggest the number of background histiocytes may be prognostically significant
Case reports
Microscopic (histologic) description
  • Effaced lymph node architecture; interfollicular pattern also possible
  • May have interstitial fibrosis but no broad bands of sclerosis or capsular thickening
  • Typical Hodgkin Reed-Sternberg cells in a variable inflammatory background (eosinophils, histiocytes, neutrophils, plasma cells)
  • May have prominent epithelioid histiocytes that may form granulomas (especially in EBV+ cases)
Microscopic (histologic) images

Contributed by Mariam A. Molani, M.D. (Case #447)

Mediastinal LN, effaced

Mediastinal LN, atypical cells among mixed inflammatory infiltrate

Reed-Sternberg cells in mediastinal lymph node



Other images hosted on PathOut server:

Various images

Positive stains
  • Classic Hodgkin lymphoma phenotype, EBV+ in 75%
Differential diagnosis
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