The impact of complete embedding of remaining tissue in gynecological lymph node dissection specimen in surgical pathology on lymph node yield: is it clinically relevant?

Pelvic lymph node dissection for cervical or bladder cancer: embedding residual fat tissue offers no added value

Diagnosis of lymph node metastases in pelvic lymph node dissection (PLND) is important for staging and treatment. Standard practice is to submit visible or palpable lymph nodes for histology. We assessed the added value of embedding all residual fatty tissue.Patients (n = 85) who underwent PLND for cervical (n = 50) or bladder cancer (n = 35) between 2017 and 2019 were included. Study approval was obtained (MEC-2022-0156, 18.03.2022, retrospectively registered).The median lymph node yield with conventional pathological dissection was 21 nodes (Interquartile range (IQR) 18-28). This led to discovery of positive lymph nodes in 17 (20%) patients. Extended pathological assessment found 7 (IQR 3-12) additional nodes, but did not result in identification of more node metastases.Histopathological analysis of residual fatty tissue harvested at PLND resulted in an increased lymph node yield, but not in the detection of additional lymph node metastases.

Number of paraaortic lymph node dissections as a prognostic factor in locally advanced cervical cancer

BACKGROUND

Lymph node (LN) metastases are the most important prognostic factor in locally advanced cervical cancer. Paraaortic lymphadenectomy is the only method able to confirm the presence of metastasis and thereby help to determine the most adequate treatment approach. There is no standard regarding the minimal number of LNs that should be removed in paraaortic lymphadenectomy. Women with undiagnosed positive paraaortic LNs (false negatives) due to a low LN count do not receive extended-field radiation therapy, which may lead to worse survival outcomes. The aim of this study is to confirm LN metastases as poor prognosis and to assess whether in cases of locally advanced CC with negative paraaortic LN status, the number of paraaortic LN laparoscopically removed carries a prognostic value.

METHODS

We analyzed 78 patients with locally advanced cervical cancer that underwent complete paraaortic lymphadenectomy.

RESULTS

Fifteen (19.2%) women had paraaortic LN metastases. The mean number of LN extracted was 11.1 (SD 7.5). Patients with paraaortic LN metastases presented a worse overall survival (127.1 months [95% CI 111.7-142.4] vs. 59.6 months [95% CI 31.2-87.9]; p<0.01). Nevertheless, there were no differences regarding disease-free survival. There were no prognostic differences according to the number of LNs resected in patients with negative lymphadenectomy.

CONCLUSIONS

Patients with locally advanced cervical cancer and paraaortic LN metastases present worse survival. In women with negative paraaortic LN, the number of LNs removed does not imply shorter survival.