Nephroblastoma: does the decrease in tumor volume under preoperative chemotherapy predict the lymph nodes status at surgery?

Abstract:

BACKGROUND:Partial nephrectomy (NSS) for unilateral nephroblastoma may be beneficial, although in case of regional lymph node (LN) involvement, radiotherapy counteracts the functional benefit of NSS. The aim is to verify whether decrease of tumor volume under preoperative chemotherapy implies clearance of regional LN. PROCEDURE:SIOP 9301 (1993-2001) collected 1,450 localized nephroblastoma patients of whom 1,360 (93%) had sufficiently available data and were retrospectively reviewed. RESULTS:Histologic subtypes were classically distributed. Patients were divided in those with tumor positive LN (76, 5.5%) and those with tumor negative LN (1,284, 94.5%) at surgery. In the LN(+) group, the tumor volume changed from a median of 554 (318-772) to 192 (63-458) ml = 67% (27-88%) during preoperative ChT. In the LN(-) group-377 (200-612) to 130 (44-294) ml = 62% (28-83%) (NS). Increase of tumor volume was observed in 16% of patients with LN(+), and 11% of those with LN(-) (NS); ranges are interquartile. Initial tumor volume was significantly larger in the LN(+) patients (P = 0.00091) but not different (NS) at surgery; patients with initial tumor volume under 318 ml had the regional LN involved significantly less frequently (P = 0.00751). CONCLUSIONS:Change in tumor volume under preoperative chemotherapy is not a predictor for LN status at surgery, although larger initial volume is associated with a higher risk of LN invasion. The decrease of tumor volume is not a good criterion for the safety of NSS. The low rate of LN(+) (5.5%) indicates that this risk is low.

journal_name

Pediatr Blood Cancer

journal_title

Pediatric blood & cancer

authors

Godzinski J,van Tinteren H,de Kraker J,Graf N,Bergeron C,Heij H,von Schweinitz D,Fuchs J,Cecchetto G,Audry G,Gauthier F,Sandstedt B,SIOP Nephroblastoma Trial & Study Committee.

doi

10.1002/pbc.23147

subject

Has Abstract

pub_date

2011-12-15 00:00:00

pages

1266-9

issue

7

eissn

1545-5009

issn

1545-5017

journal_volume

57

pub_type

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