#PAGE_PARAMS# #ADS_HEAD_SCRIPTS# #MICRODATA#

Challenges in the management of metastatic cutaneous squamous cell carcinomas of the head and neck


Authors: Z. Horáková;  Ivo Stárek;  R. Salzman
Authors‘ workplace: Klinika otorinolaryngologie a chirurgie hlavy a krku LF UP a FN Olomouc
Published in: Otorinolaryngol Foniatr, 75, 2026, No. 2, pp. 102-111.
Category: Review Article
doi: https://doi.org/10.48095/ccorl2026102

Overview

The incidence of cutaneous squamous cell carcinomas (cSCC), including their metastatic forms, is steadily increasing. For most cSCCs of the head, the primary regional lymphatic drainage area is the parotid lymph nodes. Metastases often present as isolated recurrences occurring after resection of the primary tumor. The risk of metastasing is difficult to stratify with precision using currently known clinical and pathological parameters. The development of metastases significantly worsens the otherwise excellent prognosis of localized cSCC, reducing the 5-year survival rate to just 50–65%. Therefore, adequate resection of the primary skin tumor is of critical importance. Elective lymphadenectomy is not indicated in cSCC. Due to their rapid and aggressive growth, parotid metastases require radical multimodal treatment. This includes complete surgical resection –⁠ via partial superficial, total, or extended parotidectomy –⁠ combined with elective or therapeutic neck dissection (ND), followed by adjuvant radiotherapy (RT), and in some cases, chemoradiotherapy. After completion of treatment, regular follow-up is essential, particularly for high-risk forms of cSCC. This surveillance should include monitoring of the regional lymphatic system.

Keywords:

parotidectomy – cutaneous squamous cell carcinoma – parotid gland carcinoma – parotid metastases


Sources

1. American Cancer Society. Cancer.org. 2021 [online]. Dostupné z: https: //www.cancer.org.

2. Masaryk University; Institute of Health Information and Statistics of the Czech Republic. Portal of Cancer Epidemiology in the Czech Republic. 2025 [online]. Dostupné z: https: //www.svod.cz.

3. Sung H, Ferlay J, Siegel RL et al. Global cancer statistics 2020: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin 2021; 71 (3): 209–249. Doi: 10.3322/caac.21660.

4. Parker ER. The influence of climate change on skin cancer incidence: a review of the evidence. Int J Womens Dermatol 2020; 7 (1): 17–27. Doi: 10.1016/j.ijwd.2020.07.003.

5. Que SKT, Zwald FO, Schmults CD. Cutaneous squamous cell carcinoma: incidence, risk factors, diagnosis, and staging. J Am Acad Dermatol 2018; 78 (2): 237–247. Doi: 10.1016/j.jaad.2017.08.059.

6. Haisma MS, Plaat BEC, Bijl HP et al. Multivariate analysis of potential risk factors for lymph node metastasis in patients with cutaneous squamous cell carcinoma of the head and neck. J Am Acad Dermatol 2016; 75 (4): 722–730. Doi: 10.1016/j.jaad.2016.06.010.

7. Wermker K, Kluwig J, Schipmann S et al. Prediction score for lymph node metastasis from cutaneous squamous cell carcinoma of the external ear. Eur J Surg Oncol 2015; 41 (1): 128–135. Doi: 10.1016/j.ejso.2014.07.039.

8. Thompson AK, Kelley BF, Prokop LJ et al. Risk factors for cutaneous squamous cell carcinoma recurrence, metastasis, and disease-specific death: a systematic review and meta-analysis. JAMA Dermatol 2016; 152 (4): 419–428. Doi: 10.1001/jamadermatol.2015.4994.

9. Cherpelis BS, Marcusen C, Lang PG. Prognostic factors for metastasis in squamous cell carcinoma of the skin. Dermatol Surg 2002; 28 (3): 268–273. Doi: 10.1046/j.1524-4725.2002.01169.x.

10. Rowe DE, Carroll RJ, Day CL. Prognostic factors for local recurrence, metastasis, and survival rates in squamous cell carcinoma of the skin, ear, and lip: implications for treatment modality selection. J Am Acad Dermatol 1992; 26 (6): 976–990. Doi: 10.1016/0190-9622 (92) 70144-5.

11. Clark RR, Soutar DS. Lymph node metastases from auricular squamous cell carcinoma: a systematic review and meta-analysis. J Plast Reconstr Aesthet Surg 2008; 61 (10): 1140–1147. Doi: 10.1016/j.bjps.2008.04.036.

12. Rubió Casadevall J, Hernandez Pujol AM, Ferreira Santos MC et al. Trends in incidence and survival in nonmelanoma skin cancer from 1994 to 2012 in Girona, Spain: a population-based study. Cancer Epidemiol 2016; 45 : 6–10. Doi: 10.1016/j.canep.2016.09.001.

13. Arnold M, Holterhues C, Hollestein LM, et al. Trends in incidence and predictions of cutaneous melanoma across Europe up to 2015. J Eur Acad Dermatol Venereol 2014; 28 : 1170–1178. Doi: 10.1111/jdv.12236.

14. Weiss MH, Harrison LB, Isaacs RS. Use of decision analysis in planning a management strategy for the stage N0 neck. Otolaryngol Head Neck Surg 1994; 120 (6): 699–702. Doi: 10.1016/S0194-5998 (94) 70327-8.

15. National Comprehensive Cancer Network. NCCN Clinical Practice Guidelines in Oncology: Squamous cell skin cancer, Version 1.2022. J Natl Compr Canc Net 2021; 19 (12): 1382–1395. Doi: 10.6004/jnccn.2021.0059.

16. Brougham ND, Dennett ER, Cameron R et al. The incidence of metastasis from cutaneous squamous cell carcinoma and the impact of its risk factors. J Surg Oncol 2012; 106 : 811–815. Doi: 10.1002/jso.23155.

17. Brantsch KD, Meisner C, Schönfisch B et al. Analysis of risk factors determining prognosis of cutaneous squamous cell carcinoma: a prospective study. Lancet Oncol 2008; 9 (8): 713–720. Doi: 10.1016/S1470-2045 (08) 70178-5.

18. Karia PS, Han J, Schmults CD. Cutaneous squamous cell carcinoma: estimated incidence of disease, nodal metastasis, and deaths from disease in the United States, 2012. J Am Acad Dermatol 2013; 68 (6): 957–966. Doi: 10.1016/j.jaad.2012.11.037.

19. Zeng S, Fu L, Zhou P, Ling H. Identifying risk factors for the prognosis of head and neck cutaneous squamous cell carcinoma: a systematic review and meta-analysis. PLoS One 2020; 15 (9): e0239586. Doi: 10.1371/journal.pone.0239586.

20. Roozeboom MH, Lohman BG, Westers Attema A et al. Clinical and histological prognostic factors for local recurrence and metastasis of cutaneous squamous cell carcinoma: analysis of a defined population. Acta Derm Venereol 2013; 93 (4): 417–421. Doi: 10.2340/00015555-1501.

21. Quaedvlieg PJ, Creytens DH, Epping GG et al. Histopathological characteristics of metastasizing squamous cell carcinoma of the skin and lips. Histopathology 2006; 49 (3): 256–264. Doi: 10.1111/j.1365-2559.2006.02472.x.

22. Jambusaria Pahlajani A, Kanetsky PA, Karia PS et al. Evaluation of AJCC tumor staging for cutaneous squamous cell carcinoma and a proposed alternative tumor staging system. JAMA Dermatol 2013; 149 (4): 402–410. Doi: 10.1001/jamadermatol.2013.2456.

23. Vauterin TJ, Veness MJ, Morgan GJ et al. Patterns of lymph node spread of cutaneous squamous cell carcinoma of the head and neck. Head Neck 2006; 28 : 785–791. Doi: 10.1002/hed.20417.

24. Carter JB, Johnson MM, Chua TL et al. Outcomes of primary cutaneous squamous cell carcinoma with perineural invasion: an 11-year cohort study. JAMA Dermatol 2013; 149 (1): 35–41. Doi: 10.1001/jamadermatol.2013.746

25. Amin MB, Edge S, Greene F et al. (eds). AJCC Cancer Staging Manual. 8th ed. New York, NY: Springer International Publishing 2017.

26. Durham AB, Lowe L, Malloy KM et al. Sentinel lymph node biopsy for cutaneous squamous cell carcinoma on the head and neck. JAMA Otolaryngol Head Neck Surg 2016; 142 (12): 1171–1176. Doi: 10.1001/jamaoto.2016.1927.

27. Gore SM, Shaw D, Martin RC et al. Prospective study of sentinel node biopsy for high-risk cutaneous squamous cell carcinoma of the head and neck. Head Neck 2016; 38 (spec E): E884–E889.

28. Del Regno L, Catapano S, Di Stefani A et al. A review of existing therapies for actinic keratosis: current status and future directions. Am J Clin Dermatol 2022; 23 (3): 339–352. Doi: 10.1007/s40257-022-00674-3

29. Stenger M. Brigham and Women’s Hospital tumor staging for cutaneous squamous cell carcinoma outperforms AJCC and UICC staging. The ASCO Post. March 15, 2014. 2014 [online]. Dostupné z: https: //ascopost.com.

30. Ruiz ES, Karia PS, Besaw R et al. Performance of the American Joint Committee on Cancer Staging Manual, 8th Edition vs the Brigham and Women’s Hospital Tumor Classification System for Cutaneous Squamous Cell Carcinoma. JAMA Dermatol 2019; 155 (7): 819–825. Doi: 10.1001/jamadermatol.2019.0032

31. Slater NA, Googe PB. PD L1 expression in cutaneous squamous cell carcinoma correlates with risk of metastasis. J Cutan Pathol 2016; 43 : 663-670. Doi: 10.1111/cup.12728.

32. Konicke K, López Luna A, Muñoz Carrillo JL et al. The microRNA landscape of cutaneous squamous cell carcinoma. Drug Discov Today 2018; 23 (4): 864–870. Doi: 10.1016/j.drugdisc.2017.12.008.

33. Gillespie J, Skeeles LE, Allain DC et al. MicroRNA expression profiling in metastatic cutaneous squamous cell carcinoma. J Eur Acad Dermatol Venereol 2016; 30 (6): 1043–1045. Doi: 10.1111/jdv.13685

34. Wysong A, Newman JG, Covington KR et al. Validation of a 40 gene expression profile test to predict metastatic risk in localized high risk cutaneous squamous cell carcinoma. J Am Acad Dermatol 2021; 84 (2): 361–369. Doi: 10.1016/j.jaad.2020.04.088.

35. Masarwy R, Shilo S, Neiderman NN et al. The prognostic value and clinical utility of the 40 gene expression profile (40 GEP) test in cutaneous squamous cell carcinoma: systematic review and meta analysis. Cancers 2023; 15 (9): 2456. Doi: 10.3390/cancers15092456.

36. Mendenhall WM, Amur RJ, Hinerman RW et al. Radiotherapy for cutaneous squamous and basal cell carcinomas of the head and neck. Laryngoscope 2009; 119 (10): 1994–1999.

37. Gurudutt VV, Genden EM. Cutaneous squamous cell carcinoma of the head and neck. J Skin Cancer 2011; 2011 : 502723. Doi: 10.1155/2011/502723.

38. Jenkins G, Smith AB, Kanatas AN et al. Anatomical restrictions in the surgical excision of scalp squamous cell carcinomas: does this affect local recurrence and regional nodal metastases? Int J Oral Maxillofac Surg 2014; 43 (2): 142–146. Doi: 10.1016/j.ijom.2013.08.018.

39. Stratigos A, Garbe C, Lebbe C et al. Diagnosis and treatment of invasive squamous cell carcinoma of the skin: European consensus based interdisciplinary guideline. Eur J Cancer 2012; 51 (14): 1989-2007. Doi: 10.1016/j.ejca.2015.06.110.

40. Lee S, Kim GE, Park CS et al. Primary squamous cell carcinoma of the parotid gland. Am J Otolaryngol. 2001; 22 (6): 400–406. Doi: 10.1053/ajot.2001.28068

41. Genders RE, Marsidi N, Michi M et al. Incomplete excision of cutaneous squamous cell carcinoma: systematic review of the literature. Acta Derm Venereol 2020; 100 (6): adv00084. Doi: 10.2340/00015555-3441.

42. Mourouzis C, Boynton A, Grant J et al. Cutaneous head and neck SCCs and risk of nodal metastasis –⁠ UK experience. J Craniomaxillofac Surg 2009; 37 : 443–447. Doi: 10.1016/j.jcms.2009.07.007.

43. Said S, Kadir SO, Erdoğan K et al. Determining the number and distribution of intraparotid lymph nodes according to parotidectomy classification of European Salivary Gland Society: cadaveric study. Head Neck 2020; 42 (12): 3685–3692. Doi: 10.1002/hed.26434.

44. Ebrahimi A, Moncrieff MD, Clark JR et al. Predicting the pattern of regional metastases from cutaneous squamous cell carcinoma of the head and neck based on location of the primary. Head Neck 2010; 32 : 1288–1294. Doi: 10.1002/hed.21332

45. Kashiwagi N, Murakami T, Toguchi M et al. Metastases to the parotid nodes: CT and MR imaging findings. Dentomaxillofac Radiol 2016; 45 (8): 20160201. Doi: 10.1259/dmfr.20160201.

46. Sweeny L, Zimmerman T, Carroll WR et al. Head and neck cutaneous squamous cell carcinoma requiring parotidectomy: prognostic indicators and treatment selection. Otolaryngol Head Neck Surg 2014; 150 : 610–617. Doi: 10.1177/0194599814520686.

47. Kampel L, Dorman A, Horovitz G et al. The role of parotidectomy for advanced cutaneous squamous cell carcinoma of the head and neck. Eur Arch Otorhinolaryngol 2021; 278 : 3955–3963.

48. D‘Souza J, Clark J. Management of the neck in metastatic cutaneous squamous cell carcinoma of the head and neck. Curr Opin Otolaryngol Head Neck Surg 2011; 19 (2): 99–105. Doi: 10.1097/MOO.0b013e328343e811.

49. Del Signore G, Megwalu UC. The rising incidence of major salivary gland cancer in the United States. Ear Nose Throat J 2017; 96 (3): E13–E16.

50. Burton KA, Ashack KA, Khachemoune A. Cutaneous squamous cell carcinoma: a review of high-risk and metastatic disease. Am J Clin Dermatol 2016; 17 (5): 491–508.

51. O‘Brien CJ, McNeil EB, McMahon JD et al. Significance of clinical stage, extent of surgery, and pathologic findings in metastatic cutaneous squamous carcinoma of the parotid gland. Head Neck 2002; 24 (5): 417–422. Doi: 10.1002/hed.10063.

52. Pfisterer MJ, Vazquez A, Mady L et al. Squamous cell carcinoma of the parotid gland: a population-based analysis of 2545 cases. Am J Otolaryngol 2014; 35 (4): 469–475.

53. Akhtar K, Ray PS, Sherwani R et al. Primary squamous cell carcinoma of the parotid gland: a rare entity. BMJ Case Rep 2013; 2013: bcr2013009467. Doi: 10.1136/bcr-2013-009467.

54. Taxy JB. Squamous carcinoma in a major salivary gland: a review of the diagnostic considerations. Arch Pathol Lab Med 2001; 125 (6): 740–745. Doi: 10.5858/2001-125-0740-SCIAMS.

55. Ying MYL, Johnson JT, Myers EN. Squamous cell carcinoma of the parotid gland. Head Neck 2006; 28 (7): 626–632. Doi: 10.1002/hed.20360.

56. Verim OF, Çalım OD, Yüksel S. Parotid gland mass as the presenting symptom of nasopharyngeal carcinoma. Med Bull Haseki 2014; 52 : 130–132.

57. Chen MM, Roman SA, Judson BL. Prognostic factors for squamous cell cancer of the parotid gland: an analysis of 2104 patients. Head Neck 2015; 37 (1): 1–7.

58. Edafe O, Hughes B, Tsirevelou P et al. Understanding primary parotid squamous cell carcinoma –⁠ a systematic review. Surgeon 2020; 18 (1): 44–48. Doi: 10.1016/j.surge.2019.03.006.

59. Aboziada MA, Eisbruch A. Parotid squamous cell carcinoma: is it a primary or secondary? J Clin Oncol 2011; 29 (Suppl): e16002. Doi: 10.1200/JCO.2011.29.15suppl.e16002.

60. Bron LP, Traynor SJ, McNeil EB et al. Primary and metastatic cancer of the parotid: comparison of clinical behavior in 232 cases. Laryngoscope 2003; 113 (6): 1070–1075. Doi: 10.1097/00005537-200306000-00018.

61. Bradley PJ, Stenman G, Thompson LDR et al. Metastatic cutaneous squamous cell carcinoma accounts for nearly all squamous cell carcinomas of the parotid gland. Virchows Arch 2024; 485 (2): 367–375. Doi: 10.1007/s00405-024-03798-5.

62. Fishbach S, Steinhardt G, Zhen CJ et al. High rates of ultraviolet-signature mutations in squamous cell carcinomas of the parotid gland and prognostic implications. Head Neck Pathol 2022; 16 (1): 236–247. Doi: 10.1007/s12105-021-01349-x.

63. Gerami P, Cook RW, Wilkinson J et al. Development of a prognostic genetic signature to predict the metastatic risk associated with cutaneous melanoma. Clin Cancer Res 2015; 21 (1): 175–183. Doi: 10.1158/1078-0432.CCR-13-3316.

64. O’Hara J, Ferlito A, Takes RP et al. Cutaneous squamous cell carcinoma of the head and neck metastasizing to the parotid gland –⁠ a review of current recommendations. Head Neck 2011; 33 : 1789–1795. Doi: 10.1002/hed.21583.

65. Hinerman RW, Indelicato DJ, Amdur RJ, et al.Cutaneous squamous cell carcinoma metastatic to parotid-area lymph nodes. Laryngoscope 2008; 118 (11): 1989–1996. Doi: 10.1097/MLG.0b013e3181809a3e.

66. Forest VI, Clark JJ, Veness MJ et al. N1S3: a revised staging system for head and neck cutaneous squamous cell carcinoma with lymph node metastases: results of 2 Australian cancer centers. Cancer 2010; 116 (5): 1298–1304. Doi: 10.1002/cncr.24855.

67. O‘Sullivan B, Brierley J, Byrd D et al. The TNM classification of malignant tumours: towards common understanding and reasonable expectations. Lancet Oncol 2017; 18 (7): 849–851. Doi: 10.1016/S1470-2045 (17) 30438-2.

68. Brierley JD, Gospodarowicz MK, Wittekind C (eds). TNM Classification of Malignant Tumours. 8th ed. Oxford (UK): Wiley-Blackwell 2017.

69. Andruchow JL, Veness MJ, Morgan GJ et al. Implications for clinical staging of metastatic cutaneous SCC of the head and neck based on a multicentre study of treatment outcomes. Cancer 2006; 106 (5): 1078–1083. Doi: 10.1002/cncr.21601.

70. Keohane SG, Proby CM, Newlands C et al. The new 8th edition of TNM staging and its implications for skin cancer: a review by the British Association of Dermatologists and the Royal College of Pathologists, U.K. Br J Dermatol 2018; 179 (4): 824–828. Doi: 10.1111/bjd.16892.

71. Amit M, Liu C, Mansour J et al. Elective neck dissection versus observation in patients with head and neck cutaneous squamous cell carcinoma. Cancer 2021; 127 (23): 4413–4420. Doi: 10.1002/cncr.33773.

72. Osborne RF, Shaw T, Zandifar H et al. Elective parotidectomy in the management of advanced auricular malignancies. Laryngoscope 2008; 118 (12): 2139–2145. Doi: 10.1097/MLG.0b013e318182c30b.

73. Zbaren P, Schupbach J, Nuyens M et al. Elective neck dissection versus observation in primary parotid carcinoma. Otolaryngol Head Neck Surg 2005; 132 (3): 387–391.

74. Rotman A, Kerr SJ, Giddings CEB. Elective neck dissection in metastatic cutaneous squamous cell carcinoma to the parotid gland: a systematic review and meta-analysis. Head Neck 2019; 41 (4): 1131–1139. Doi: 10.1002/hed.25561.

75. Hoch S, Franke N, Katabi N et al. The value of elective parotidectomy in advanced squamous cell carcinoma of the skin of the head. Anticancer Res 2014; 34 (5): 2433–2436.

76. Kadakia S, Ducic Y, Marra D et al. The role of elective superficial parotidectomy in the treatment of temporal region squamous cell carcinoma. Oral Maxillofac Surg 2016; 20 (2): 143–147. Doi: 10.1007/s10006-015-0539-9.

77. Yoon M, Chougule P, Dufresne R et al. Localized carcinoma of the external ear is an unrecognized aggressive disease with a high propensity for local regional recurrence. Am J Surg 1992; 164 (6): 574–577.

78. Dür C, Salmina C, Borner U et al. Relevance of intraparotid metastases in head and neck skin squamous cell carcinoma. Laryngoscope 2021; 131 (4): 788–793. Doi: 10.1002/lary.28985.

79. Cannon RB, Dundar Y, Thomas A et al. Elective neck dissection for head and neck cutaneous squamous cell carcinoma with skull base invasion. Otolaryngol Head Neck Surg 2017; 156 (4): 671–676. Doi: 10.1177/0194599817691923.

80. Phulpin B, Kopp Q, Cortese S et al. Parotid sentinel lymph node biopsy combined with intraoperative facial nerve monitoring in head and neck tumor. Glob Surg 2017; 3 (1): 1000150. Doi: 10.15761/GOS.1000150.

81. Demir D. The role of sentinel lymph node biopsy in head and neck cancers and its application areas. Turk Arch Otorhinolaryngol 2016; 54 (1): 35–38. Doi: 10.5152/tao.2016.1129.

82. Cracchiolo JR, Shaha AR. Parotidectomy for parotid cancer. Otolaryngol Clin North Am 2016; 49 (2): 415–424. Doi: 10.1016/j.otc.2015.10.007.

83. D‘Souza J, Clark J. Management of the neck in metastatic cutaneous squamous cell carcinoma of the head and neck. Curr Opin Otolaryngol Head Neck Surg 2011; 19 (2): 99–105. Doi: 10.1097/MOO.0b013e328343e811.

84. Thom JJ, Moore EJ, Price DL. The role of total parotidectomy for metastatic cutaneous squamous cell carcinoma and malignant melanoma. JAMA Otolaryngol Head Neck Surg 2014; 140 (6): 548-554. Doi: 10.1001/jamaoto.2014.327.

85. Leong WS, Gowda S, Jackson R et al. Superficial versus total parotidectomy for metastatic cutaneous squamous cell carcinoma and melanoma of the head and neck: a systematic review. J Laryngol Otol 2023; 137 (6): 592–598. Doi: 10.1017/S0022215122001724.

86. Khurana VG, Menti DH, O‘Brien CJ et al. Parotid and neck metastases from cutaneous squamous cell carcinoma of the head and neck. Am J Surg 1995; 170 (5): 446–450. Doi: 10.1016/s0002-9610 (99) 80326-2.

87. Terakedis BE, Hunt JP, Buchmann LO et al. The prognostic significance of facial nerve involvement in carcinomas of the parotid gland. Am J Clin Oncol 2017; 40 (3): 323–328. Doi: 10.1097/COC.0000000000000157.

88. Nobis CH, Rohleder N, Wolf KD et al. Head and neck salivary gland carcinomas –⁠ elective neck dissection, yes or no? J Oral Maxillofac Surg 2014; 72 (1): 205–210. Doi: 10.1016/j.joms.2013.05.024.

89. Audet N, Palme CE, Gullane PJ et al. Cutaneous metastatic squamous cell carcinoma to the parotid gland: analysis and outcome. Head Neck 2004; 26 (8): 727–732. Doi: 10.1002/hed.20048.

90. Yesensky J, Solis RN, Bewley A. Facial nerve sacrifice during parotidectomy for metastatic cutaneous squamous cell carcinoma. OTO Open 2021; 5 (1): 2473974X21996627. Doi: 10.1177/2473974X21996627.

Labels
Audiology Paediatric ENT ENT (Otorhinolaryngology)

Article was published in

Otorhinolaryngology and Phoniatrics

Issue 2

2026 Issue 2

Most read in this issue
Login
Forgotten password

Enter the email address that you registered with. We will send you instructions on how to set a new password.

Login

Don‘t have an account?  Create new account

#ADS_BOTTOM_SCRIPTS#