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[Neoplasms with unknown primary location].

F Buda1, L De Gregori, S Salamanca

  • 1Centro oncologico per la Prevenzione, diagnosi e terapia dei tumori, Regione A. Friuli Venezia Giulia, S. Vito Tagliamento.

Recenti Progressi in Medicina
|July 1, 1990
PubMed
Summary
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Neoplasms of unknown primary location (U.P.L.N.) are aggressive cancers with high mortality. Current treatments offer limited impact, but combination therapies including anthracyclines, cyclophosphamide, and immunomodulators show promise.

Area of Science:

  • Oncology
  • Pathology

Background:

  • Neoplasms of unknown primary location (U.P.L.N.) constitute a significant challenge in oncological pathology, affecting 0.5%-10% of cancer cases.
  • These cancers exhibit aggressive, systemic behavior from onset, leading to high mortality rates despite current therapeutic interventions.

Purpose of the Study:

  • To analyze the incidence, histotypes, clinical presentation, and treatment outcomes of U.P.L.N.
  • To evaluate the efficacy of various treatment modalities and suggest potential therapeutic strategies.

Main Methods:

  • Retrospective analysis of 1786 cancer diagnoses from February 1980 to January 1988, identifying 5.37% as U.P.L.N.
  • Histopathological classification of U.P.L.N. and documentation of clinical presentation and therapeutic interventions.

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Main Results:

  • Adenocarcinoma (65%), epidermoid carcinoma (21%), and undifferentiated carcinoma (14%) were the predominant histotypes.
  • Lymph node involvement was the most frequent clinical presentation, followed by serosa, bone, lung, and liver.
  • Complex therapeutic regimens yielded limited clear results, though anthracyclines and cyclophosphamide showed potential.

Conclusions:

  • U.P.L.N. prognosis is significantly influenced by histotype and metastatic spread.
  • Combination therapy involving classic chemotherapeutics, potentially with anthracyclines and cyclophosphamide, alongside immunomodulators like interferons, thymus hormone, and lymphokines, is recommended.