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  • Title: Postchemotherapy retroperitoneal lymph node dissection in patients presenting with very high HCG levels.
    Author: Speir RW, Calaway AC, Einhorn LH, Foster RS, Cary C.
    Journal: Urol Oncol; 2020 Aug; 38(8):687.e19-687.e23. PubMed ID: 32448503.
    Abstract:
    PURPOSE: Choriocarcinoma germ cell tumors are rare and usually present with significantly elevated human chorionic gonadotropin (hCG) levels. When curable, it is felt to be largely a result of chemotherapy. We sought to determine the histologic characteristics for those undergoing postchemotherapy retroperitoneal lymph node dissection (PC-RPLND) and compare them with metastatic nonseminomatous germ cell tumor (NSGCT) patients with similarly elevated hCG levels. METHODS: We reviewed medical records of men undergoing PC-RPLND between 1988 and 2017 with postorchiectomy, preinduction chemotherapy hCG levels greater than 50,000 mIU/ml. They were stratified by primary tumor histology: Pure choriocarcinoma and mixed NSGCT. Clinical, pathologic, and serologic data were reported and logistic regression was used to assess for predictors of necrosis in the PC-RPLND specimen. RESULTS: Our cohort consisted of 108 men. The mixed group (n = 91) had a median hCG of 165,177 mIU/ml, a postchemotherapy node size of 4.7 cm, of whom 19.8% also received salvage chemotherapy prior to RPLND. The pure choriocarcinoma group (n = 17) had a median hCG of 170,267 mIU/ml, a node size of 5.1 cm, of whom 17.6% received salvage chemotherapy. 88.2% of patients with choriocarcinoma had necrosis in the PC-RPLND specimen compared with 29.7% of the mixed NSGCT group (P = <0.0001). Controlling for salvage chemotherapy use, prechemotherapy hCG, node size and marker status, choriocarcinoma patients were 20 fold more likely to have necrosis on RPLND specimen (Odds ratio 20.68 [95% confidence interval 5.279-81.114]). CONCLUSION: While PC-RPLND is appropriate in patients with residual masses after chemotherapy, patients with pure choriocarcinoma presenting with significantly elevated hCG levels represent a unique patient population where necrosis is found more often than anticipated.
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