Diagnostic Evaluation for Metastatic Ovarian Tumors

Clinical History and Examination

The American College of Oncology recommends assessing key symptoms such as abdominal/pelvic pain, constipation, diarrhea, urinary frequency, vaginal bleeding, abdominal distension, and fatigue in patients with suspected metastatic ovarian tumors 1
In advanced disease, symptoms such as ascites, abdominal masses causing bloating, nausea, anorexia, dyspepsia, and early satiety should be evaluated 1
Respiratory symptoms should be assessed if pleural involvement is present 1

The National Comprehensive Cancer Network recommends using serum tumor markers such as CA-125, CEA, and CA 19-9 for differential diagnosis, with CA-125 elevated in ~85% of advanced ovarian cancer cases 1, 2
A CA-125/CEA ratio ≤25:1 suggests gastrointestinal primary rather than ovarian origin 1
Complete blood count and differential, as well as renal and hepatic function tests, should be performed 3

The American College of Radiology recommends transvaginal and transabdominal ultrasound as the initial evaluation, including color/power Doppler to assess vascularity 1, 4
CT chest, abdomen, and pelvis with IV contrast is essential for complete staging and surgical planning 1, 3, 4
MRI pelvis may be used if ultrasound or CT findings are indeterminate, particularly for tissue characterization 4, 5

The National Comprehensive Cancer Network recommends upper and lower endoscopy if CEA or CA 19-9 are elevated, or if CA-125/CEA ratio is ≤25:1, to evaluate for gastrointestinal primary tumors 1, 2
Appendectomy is recommended at primary surgery for suspected or confirmed mucinous ovarian tumors 2

The College of American Pathologists recommends definitive diagnosis requires pathological examination by an expert pathologist of adequate tumor sample from diagnostic biopsy or surgical specimen 1
Immunohistochemistry patterns, such as PAX8, CK7, and CK20, can help distinguish primary ovarian from metastatic adenocarcinomas 1, 2