Clinical lung cancer · 2025
Correlation of PET-CT, Endobronchial Ultrasound Cytology and Surgical Biopsy in Patients with Non-Small Cell Lung Cancer Undergoing Curative Surgery.
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Rakedzon Stav, Mor Elad, Yechiel Yaniv, Saiet Yaron, Khoury Fuad, Gur Ivan, Feldman Tzah, Guralnik Ludmila, Katz Amit, Zohar Yaniv, Keidar Zohar, Daher Sameh, Kagna Olga, Solomonov Anna, Dawood Hanna, Shentzer Kutiel Talia, Zer Kuch Alona, Fuchs Eyal, Dotan Yaniv
Аннотация
BACKGROUND: Non-small cell lung cancer (NSCLC) is the leading cause of cancer mortality worldwide. The recommended approach for mediastinal staging is a combination of both positron emission tomography- computed tomography (PET-CT) and endobronchial ultrasound (EBUS). Data on the correlation of PET-CT uptake to EBUS cytology and surgical lymph node biopsy is scarce.
PATIENTS AND METHODS: Of 379 patients diagnosed with NSCLC, 65 underwent preoperative PET-CT, EBUS, and surgical lymph node biopsies. The correlations between EBUS cytology, fluoro-deoxy glucose (FDG) uptake (SUVmax) by PET-CT, and surgical biopsy were analyzed.
RESULTS: About 229 lymph nodes derived from 65 patients were sampled, of which 67 lymph nodes had data from EBUS, PET-CT, and surgical biopsy. 58 nodes were negative in all modalities; 6 were malignant on EBUS but negative on surgical biopsy; 2 were malignant for both modalities; and one was EBUS negative but malignant in surgical staging. EBUS sensitivity was 89% with a negative predictive value of 98%. Six patients were upstaged after surgery due to inaccessible lymph nodes (at stations 5 and intralobar) for EBUS. No malignant lymph nodes had maximum standardized uptake (SUVmax) lower than 2.9.
CONCLUSION: EBUS has high sensitivity and specificity rates, however it misses intralobar and station 5 lymph nodes which might upstage the patient after surgery. In cases when there is a high suspicion for malignant lymph nodes inaccessible to EBUS, other invasive strategies or neoadjuvant treatment should be considered. PET-CT was shown to be accurate in ruling out but not ruling in lymph node involvement.
PATIENTS AND METHODS: Of 379 patients diagnosed with NSCLC, 65 underwent preoperative PET-CT, EBUS, and surgical lymph node biopsies. The correlations between EBUS cytology, fluoro-deoxy glucose (FDG) uptake (SUVmax) by PET-CT, and surgical biopsy were analyzed.
RESULTS: About 229 lymph nodes derived from 65 patients were sampled, of which 67 lymph nodes had data from EBUS, PET-CT, and surgical biopsy. 58 nodes were negative in all modalities; 6 were malignant on EBUS but negative on surgical biopsy; 2 were malignant for both modalities; and one was EBUS negative but malignant in surgical staging. EBUS sensitivity was 89% with a negative predictive value of 98%. Six patients were upstaged after surgery due to inaccessible lymph nodes (at stations 5 and intralobar) for EBUS. No malignant lymph nodes had maximum standardized uptake (SUVmax) lower than 2.9.
CONCLUSION: EBUS has high sensitivity and specificity rates, however it misses intralobar and station 5 lymph nodes which might upstage the patient after surgery. In cases when there is a high suspicion for malignant lymph nodes inaccessible to EBUS, other invasive strategies or neoadjuvant treatment should be considered. PET-CT was shown to be accurate in ruling out but not ruling in lymph node involvement.