Woodward Classification of Hematogenous Lung Metastases

• Group 1: Lungs as First Site of Metastasis
  • Sarcoma (see Sarcoma, [[Sarcoma]])
  • Melanoma (see Melanoma, [[Melanoma]])
  • Choriocarcinoma (see Choriocarcinoma, [[Choriocarcinoma]])
  • Thyroid Cancer (see Thyroid Cancer, [[Thyroid Cancer]])
  • Adrenal Gland Cancer (see Adrenal Gland Cancer, [[Adrenal Gland Cancer]])
  • Testicular Cancer (see Testicular Cancer, [[Testicular Cancer]])
  • Head and Neck Cancer (see Head and Neck Cancer, [[Head and Neck Cancer]])
  • Anorectal Cancer (see Colon Cancer, [[Colon Cancer]])
• Group 2: Metastasis to Lung After Seeding of Liver
  • Gastric Adenocarcinoma (see Gastric Cancer, [[Gastric Cancer]])
  • Colon Adenocarcinoma (see Colon Cancer, [[Colon Cancer]])
  • Pancreatic Adenocarcinoma (see Pancreatic Cancer, [[Pancreatic Cancer]])
• Group 3: Simultaneous Seeding of Lung and Other Organs
  • Urothelial Cell Cancer (see Urothelial Cell Cancer, [[Urothelial Cell Cancer]])
    • Bladder Cancer
    • Ureteral Cancer
  • Renal Cell Carcinoma (see Renal Cell Carcinoma, [[Renal Cell Carcinoma]])
  • Uterine Cancer (see Uterine Cancer, [[Uterine Cancer]])
  • Cervical Cancer (see Cervical Cancer, [[Cervical Cancer]])
• Group 4: Metastasis to Bone (With Infrequent Lung Involvement)
  • Prostate Cancer (see Prostate Cancer, [[Prostate Cancer]])
  • Malignant Carcinoid Tumor Arising from Hindgut (see Carcinoid, [[Carcinoid]])
• Group 5: Complicated Pattern of Metastasis to Bone (First Site: Lung, Liver, or Bone)
  • Breast Cancer (see (see Breast Cancer, [[Breast Cancer]])

References

• Radiologic Diagnosis of Extrathoracic Metastases to the Lung. Oncology (Williston Park). 1998 Mar;12(3):431-8; discussion 441-2, 444