Skip to content
Triangle logo TriangleGet started
← Cancer of Unknown Primary (CUP)

HEALTH PROFESSIONAL · SOURCE READING

Treatment of Newly Diagnosed Favorable Cancer of Unknown Primary

Source: Cancer of Unknown Primary (CUP) Treatment (PDQ®)–Health Professional Version, National Cancer Institute.

Source updated: May 7, 2025 · Captured 2026-09-09.

Selected source text with whitespace normalised. This Triangle page is not an NCI PDQ summary.

Twenty percent of patients with cancer of unknown primary (CUP) have favorable CUP. Favorable CUP is defined by the following characteristics:

Single-site or oligometastatic disease amenable to surgery or radiation therapy.

Source links and citations

Cervical lymph node(s) with squamous cell histology (head and neck paradigm).

Source links and citations

Inguinal lymph nodes with squamous cell histology (genitourinary or anorectal source).

Source links and citations

Axillary lymph node(s) with adenocarcinoma histology (breast paradigm).

Source links and citations

Bone metastases if blastic (breast paradigm for women, prostate paradigm for men).

Source links and citations

Elevated alpha-fetoprotein (AFP) and/or beta-human chorionic gonadotropin (beta-hCG) (germ cell paradigm).

Source links and citations

Peritoneal carcinomatosis if adenocarcinoma (ovarian paradigm).

Source links and citations

Targeted therapy defined by molecular markers or by next-generation sequencing (including PD-L1, homologous recombination repair deficiency [HRD], microsatellite instability [MSI]).

Source links and citations

Neuroendocrine neoplasms.

Source links and citations

Melanoma (melanotic or amelanotic) occurring in a single lymph node site.

Source links and citations

Continue within this section

Single-Site or Oligometastatic Disease Amenable to Surgery or Radiation Therapy →Cervical Lymph Node(s) With Squamous Cell Histology (Head and Neck Paradigm) →Inguinal Lymph Nodes With Squamous Cell Histology (Genitourinary or Anorectal Source) →Axillary Lymph Node(s) With Adenocarcinoma Histology (Breast Paradigm) →Bone Metastases if Blastic (Breast Paradigm for Women, Prostate Paradigm for Men) →Elevated AFP and/or Beta-hCG (Germ Cell Paradigm) →Peritoneal Carcinomatosis if Adenocarcinoma (Ovarian Paradigm) →Targeted Therapy Defined by Molecular Markers or by Next-Generation Sequencing (Including PD-L1, HRD, MSI) →Neuroendocrine Neoplasms →Melanoma (Melanotic or Amelanotic) Occurring in a Single Lymph Node Site →

Preserved source evidence · Not medical advice