of radiological anatomy is contained in the second box. The radiologist must be aware of normal, frequent, and infrequent anatomical configurations, and should be able to translate the CT appearance of structures into the equivalent MR signal (and vice versa). The third box holds the knowledge of the “neighbors”– the radiologist should know what information surgeons and radiation and medical oncologists need to have to plan a proper treatment, in order to provide all the necessary information. This aspect implies that the radiologist must be up-to-date with all the advances in the field of TES and additional treatment options. Hence, the importance of a reporting checklist is highlighted. The fourth and last box details the knowledge of a specific “enemy,” i.e., to be aware of the expected patterns of spread and imaging appearance of neoplasms, which widely vary according to histology.
Disclosure Statement
The authors have no conflicts of interest to disclose.
References
1López F, Lund VJ, Suárez C, Snyderman CH, Saba NF, Robbins KT, et al: The impact of histologic phenotype in the treatment of sinonasal cancer. Adv Ther 2017;34:2181–2198.
2Gardner PA, Kassam AB, Rothfus WE, Snyderman CH, Carrau RL: Preoperative and intraoperative imaging for endoscopic endonasal approaches to the skull base. Otolaryngol Clin North Am 2008;41:215–230.
3Lund VJ, Stammberger H, Nicolai P, Castelnuovo P, Beal T, Beham A, et al: European position paper on endoscopic management of tumours of the nose, paranasal sinuses and skull base. Rhinol Suppl 2010;22:1–143.
4Schmalfuss IM: Imaging of endoscopic approaches to the anterior and central skull base. Clin Radiol 2018;73:94–105.
5Castelnuovo P, Battaglia P, Turri-Zanoni M, Tomei G, Locatelli D, Bignami M, et al: Endoscopic endonasal surgery for malignancies of the anterior cranial base. World Neurosurg 2014;82:S22–S31.
6Nicolai P, Battaglia P, Bignami M, Bolzoni Villaret A, Delù G, Khrais T, et al: Endoscopic surgery for malignant tumors of the sinonasal tract and adjacent skull base: a 10-year experience. Am J Rhinol 2008;22:308–316.
7Maroldi R, Ambrosi C, Farina D: Metastatic disease of the brain: extra-axial metastases (skull, dura, leptomeningeal) and tumour spread. Eur Radiol 2005;15:617–626.
8Maroldi R, Ravanelli M, Farina D, Facchetti L, Bertagna F, Lombardi D, et al: Post-treatment evaluation of paranasal sinuses after treatment of sinonasal neoplasms. Neuroimaging Clin N Am 2015;25:667–685.
9Casselman JW, Kuhweide R, Deimling M, Ampe W, Dehaene I, Meeus L: Constructive interference in steady state-3DFT MR imaging of the inner ear and cerebellopontine angle. AJNR Am J Neuroradiol 1993;14:47–57.
10Linn J, Peters F, Lummel N, Schankin C, Rachinger W, Brueckmann H, et al: Detailed imaging of the normal anatomy and pathologic conditions of the cavernous region at 3 Tesla using a contrast-enhanced MR angiography. Neuroradiology 2011;53:947–954.
11Huang T-Y, Huang I-J, Chen C-Y, Scheffler K, Chung H-W, Cheng H-C: Are TrueFISP images T2/T1-weighted? Magn Reson Med 2002;48:684–688.
12Blitz AM, Macedo LL, Chonka ZD, Ilica AT, Choudhri AF, Gallia GL, et al: High-resolution CISS MR imaging with and without contrast for evaluation of the upper cranial nerves. Neuroimaging Clin N Am 2014;24:17–34.
13Wen J, Desai NS, Jeffery D, Aygun N, Blitz A: High-resolution isotropic three-dimensional MR imaging of the extraforaminal segments of the cranial nerves. Magn Reson Imaging Clin N Am 2018;26:101–109.
14Kasemsiri P, Carrau RL, Ditzel Filho LFS, Prevedello DM, Otto BA, Old M, et al: Advantages and limitations of endoscopic endonasal approaches to the skull base. World Neurosurg 2014;82:S12–S21.
15Ferrari M, Pianta L, Borghesi A, Schreiber A, Ravanelli M, Mattavelli D, et al: The ethmoidal arteries: a cadaveric study based on cone beam computed tomography and endoscopic dissection. Surg Radiol Anat 2017;39:991–998.
16Spratt D, Cabanillas R, Lee N: The paranasal sinuses; in Lee N, Lu JJ (eds): Target Volume Delineation and Field Setup: A Practical Guide for Conformal and Intensity-Modulated Radiation Therapy. Heidelberg, Springer, 2013.
17Myers LL, Nussenbaum B, Bradford CR, Teknos TN, Esclamado RM, Wolf GT: Paranasal sinus malignancies: an 18-year single institution experience. Laryngoscope 2002;112:1964–1969.
18Grisanti S, Bianchi S, Locati LD, Triggiani L, Vecchio S, Bonetta A, et al: Bone metastases from head and neck malignancies: prognostic factors and skeletal-related events. PLoS One 2019;14:e0213934.
19Howell MC, Branstetter BF, Snyderman CH: Patterns of regional spread for esthesioneuroblastoma. Am J Neuroradiol 2011;32:929–933.
20Ascierto PA, Accorona R, Botti G, Farina D, Fossati P, Gatta G, et al: Mucosal melanoma of the head and neck. Crit Rev Oncol Hematol 2017;112:136–152.
21Liao X-B, Mao Y-P, Liu L-Z, Tang L-L, Sun Y, Wang Y, et al: How does magnetic resonance imaging influence staging according to AJCC staging system for nasopharyngeal carcinoma compared with computed tomography? Int J Radiat Oncol Biol Phys 2008;72:1368–1377.
22Sai A, Shimono T, Yamamoto A, Takeshita T, Ohsawa M, Wakasa K, et al: Incidence of abnormal retropharyngeal lymph nodes in sinonasal malignancies among adults. Neuroradiology 2014;56:1097–1102.
23Gangl K, Nemec S, Altorjai G, Pammer J, Grasl MC, Erovic BM: Prognostic survival value of retropharyngeal lymph node involvement in sinonasal tumors: a retrospective, descriptive, and exploratory study. Head Neck 2017;39:1421–1427.
24Donhuijsen K, Kollecker I, Petersen P, Gassler N, Schulze J, Schroeder H-G: Metastatic behaviour of sinonasal adenocarcinomas of the intestinal type (ITAC). Eur Arch Otorhinolaryngol 2016;273:649–654.
25Clifton N, Harrison L, Bradley PJ, Jones NS: Malignant melanoma of nasal cavity and paranasal sinuses: report of 24 patients and literature review. J Laryngol Otol 2011;125:479–485.