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European Archives of Oto-Rhino-Laryngology

Erschienen in:

28.06.2018 | Head & Neck

SPECT/CT-guided lymph drainage mapping for the planning of unilateral elective nodal irradiation in head and neck squamous cell carcinoma

verfasst von: Pieter D. de Veij Mestdagh, Marcel C. J. Jonker, Wouter V. Vogel, Willem H. Schreuder, Maarten L. Donswijk, W. Martin C. Klop, Abrahim Al-Mamgani

Erschienen in: European Archives of Oto-Rhino-Laryngology | Ausgabe 8/2018

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Abstract

Purpose

To investigate the feasibility of lymph drainage mapping (LDM) using SPECT/CT to help select head and neck cancer (HNSCC) patients for unilateral elective neck irradiation (ENI). Patients with lateralized HNSCC treated with radiotherapy routinely undergo bilateral ENI, despite the incidence of contralateral regional failure being relatively low even after unilateral ENI. We hypothesized that patients with a lateralized tumor without visible lymph drainage to the contralateral neck have an extremely low risk of contralateral involved nodes. Excluding the contralateral neck from elective irradiation will reduce radiation-induced toxicity and improve quality-of-life.

Methods

Fifty-five patients with lateralized cT1-3N0-2bM0 HNSCC not crossing the midline underwent LDM. Radiolabeled ^99mTc-nanocolloid was injected in 4–5 depots around and in the primary tumor. Lymph drainage patterns were visualized using planar scintigraphy and SPECT/CT after 4 h. We report on the incidence of contralateral drainage, the location of draining areas, and the size of underlying nodes.

Results

Lymphatic drainage was successfully visualized in 54 patients (98%). In 11 patients (20%) with visible contralateral drainage, 14 draining areas (16 nodes; median volume 0.50 cc, diameter 8.0 mm) were identified. Neck levels with contralateral drainage were level II (88%), III (25%), and IV (13%). Contralateral drainage was significantly higher in T3 compared to T1–2 tumors (45 and 14%, respectively, P = 0.035).

Conclusion

SPECT/CT-guided LDM is feasible and can be used to guide unilateral ENI in HNSCC patients in prospective studies. In addition, the anatomical confidence in visualization of contralateral drainage indicates a potential for ENI limited to draining levels alone.

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Titel: SPECT/CT-guided lymph drainage mapping for the planning of unilateral elective nodal irradiation in head and neck squamous cell carcinoma
verfasst von: Pieter D. de Veij Mestdagh
Marcel C. J. Jonker
Wouter V. Vogel
Willem H. Schreuder
Maarten L. Donswijk
W. Martin C. Klop
Abrahim Al-Mamgani
Publikationsdatum: 28.06.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: European Archives of Oto-Rhino-Laryngology / Ausgabe 8/2018
Print ISSN: 0937-4477
Elektronische ISSN: 1434-4726
DOI: https://doi.org/10.1007/s00405-018-5050-0

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SPECT/CT-guided lymph drainage mapping for the planning of unilateral elective nodal irradiation in head and neck squamous cell carcinoma