The value of sentinel node HPV status for prediction of lymphnode metastasis and recurrence in cervical cancer patients

Lee, Yong Seok; Rhim, Chae Chun; Lee, Hae Nam; Lee, Keun Ho; Bae, Seog Nyeon; Park, Jong Sup; Namkoong, Sung Eun

Abstract

OBJECTIVE
The "sentinel node" is defined as the first lymph node encountered by lymphatic vessels draining a tumor. We tried to examine whether pathologic status of sentinel nodes of cervical cancer patients represent metastatic status of pelvic and paraaortic lymph nodes and to investigate the correlation between sentinel node HPV status and lymph node metastasis and recurrence of cervical cancer patients.
METHODS
From August 2001 to December 2003, 57 patients affected by stage IB-IIA cervical cancer had sentinel node biopsies performed during radical hysterectomy and pelvic and paraaortic lymphadenectomy. We performed sentinel lymph node pathologic examination by frozen section and HPV typing by oligonucleotide microarray. After two years of follow up, we analyzed the prognosis of patients.
RESULTS
Sentinel nodes were identified in all of our patients. A total of 79 nodes were detected as sentinel nodes. Metastasis in the sentinel nodes were found in 10 patients by frozen section and 11 patients by permanent pathologic examination. The results of sentinel lymph node frozen biopsy were statistically significant for predicting the metastatic status of the pelvic lymph nodes (p<0.05), but showed one false negative case. HPV DNA was detected in the cervices of 55 patients (96.5%), 44 (80.0%) of whom were found to have HPV DNA in the sentinel nodes. HPV DNA was detected in sentinel nodes of 10 patients among 11 patients with lymph node metastases. After mean follow up of 31.7 months (range; 1-48), disease recurred in five patients and all of these patients showed HPV in sentinel nodes. Combination of sentinel node frozen biopsy and HPV typing showed negative predictive value of 100% in predicting lymph node metastasis and recurrence.
CONCLUSION
Our result suggests the possibility that sentinel node HPV typing would play a supportive role to reduce false negative rate of sentinel node biopsy. Additional study will be needed to confirm the clinical application of sentinel lymph procedure and to reveal correlation between HPV status of sentinel nodes and lymph node metastasis and recurrence of cervical cancer patients.