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  1. 1. Michael Briscoe Jr., MD Vicente Resto, MD, PhD University of Texas Medical Branch Department of Otolaryngology Grand Rounds Presentation July 29, 2009
  2. 2. Cutaneous Head and Neck Melanoma Melanoma is the fifth most common cancer in men, and the sixth in women in the United States 25-35% will be found in the head and neck The incidence has steadily increased over the past five decades (4.3% annual percentage change) It is highly curable when found at an early stage
  3. 3. Cutaneous Melanoma Melanocytes reside in the basal layer of the epidermis. They produce melanosomes which they share with adjacent keratinocytes through dendritic processes. Melanoma is uncontrolled proliferation of melanocytes
  4. 4. Anatomy of the Skin
  5. 5. Etiology and Risk Factors The main risk factor for melanoma is sun exposure. Intensity of exposure  Distance from equator Age at exposure History of sunburns Sun block may provide false sense of security leading to prolonged sun exposure. (Autier 2007)
  6. 6. Other risk factors Hobbies or jobs that require prolonged sun exposure Fitzpatrick types I-III Red/blonde hair Blue/green eyes Freckles > 100 in adults > 50 in children
  7. 7. Genetic factors Estimated 5-12% of people diagnosed with melanoma have a family history of melanoma 4 genes have been isolated from families with increased incidence of melanoma Cyclin-dependent kinase 4A (p16) ARF (p14) Cyclin-dependent kinase 4  melanocortin1 receptor
  8. 8. p16 Tumor suppressor gene found in 10-40% of melanoma prone families Mutation to this tumor suppressor gene is found in virtually all melanomas Important in cell cycle regulation during G1 checkpoint Inhibits phosphorylation of retinoblastoma protein by CDK4.
  9. 9. MC1R Transmembrane receptor expressed in melanocytes. Mediates melanin production after UV radiation or stimulation by hormones. Protooncogene Autosomal dominant, with low penetrance
  10. 10. Other genetic disorders Xeroderma pigmentosa Multiple skin cancers Decreased ability to repair DNA damaged by UV light Increased susceptibility to melanoma Congenital nevi Present at birth Those greater then 20 mm have a 5-10% chance of developing melanoma
  11. 11. Patterns of melanoma There may be horizontal growth that may take years to grow (superficial spreading) Or there may be vertical growth Vertical growth may take years May occur rapidly (4 months – 2 years) Melanoma in chronically exposed skin Melanoma in intermittently exposed skin
  12. 12. Types of melanoma Lentigo maligna (Hutchinson freckle) Lentigo malignant melanoma Nodular Desmoplastic Mucosal Multiple rare types
  13. 13. Lentigo maligna Melanoma in situ Found in chronically sun exposed areas Cheek > nose > forehead > ears > neck 60-70 year olds with no gender preference Confined to epidermis
  14. 14. Lentigo malignant melanoma There is violation of basement membrane of epidermis into dermis Spread is usually horizontal, followed by vertical spread Irregular borders 7th decade
  15. 15. Nodular Rapidly enlarging nodule (4 months - 2 years) that is black, pink, or blue Age 40-50, but can occur from 30-70s 0.4 – 5.0 centimeters with asymmetry and well defined borders
  16. 16. Desmoplastic Rare subtype with angiotropism and neurotropism Locally aggressive and infiltrative Characterized by spindle cells in desmoplastic stroma
  17. 17. Mucosal melanoma Clinically distinct from cutaneous melanoma 6th -7th decade Black, brown, tan, pink, white, blue, or gray Can be amelanotic Poor prognosis Most frequently found in the nasal cavity (anterior septum > inferior/middle turbinates) followed by oral cavity (hard palate and maxillary alveolar ridge).
  18. 18. Unusual variants of melanoma Amelonotic Spindle cell Small cell Nevoid Verrucous Spitzoid Balloon cell Malignant blue nevus
  19. 19. Clinical Presentation Comprehensive history and physical examination Targeted questions about sun exposure, hobby/job history Family history of skin cancers Previous skin cancers Duration of lesions Number of lesions
  20. 20. ABCDE Asymmetry Borders Variegated, or irregular borders Color Variegation of color, jet black, change in color Diameter Greater than 6 mm Evolving Bleeding, ulceration, pruritis to an old lesion
  21. 21. Additional Questions Constitutional symptoms Pulmonary Gastrointestinal Hepatic Musculoskeletal Neurologic Integumentary
  22. 22. Physical Exam Full head and neck exam Inspection of the entire skin surface of head and neck as well as full body evaluation In men, melanoma is most commonly found in the trunk/back followed by extremities, then head and neck region In women, it is most commonly found in the extremities, followed by trunk/back, then head and neck
  23. 23. Differential Diagnosis  Includes processes with melanocytic proliferation  Markedly atypical nevi  Halo nevi  Spitz tumors  Pigmented spindle cell tumors  Processes from sun damaged skin  Actinic keratosis  Solar lentigo  Solar melanocytic hyperplasia  Variety of pigmented sarcomas  Kaposi’s sarcoma  Angiosarcoma  leiomyosarcoma  Metastatic disease  SCCa  SCCa spindle cell variant
  24. 24. Diagnosis Requires full examination of skin Biopsy of suspicious lesions Avoid shave biopsy because they give no information on thickness of lesion Excisional with 1-2 mm margin, full thickness punch biopsy, or full thickness incisional biopsy.
  25. 25. Histology Hematoxylin and eosin stain shows Melanocytic proliferation, pleomorphism, high nuclear to cytoplasmic ratio, enlarged nuclei and nucleoli. Pagetoid spread Lentiginous melanocytic proliferation Immunohistologic staining S-100, HMB-45, vimentin, MART1  Cytokeratin negative
  26. 26. Histology
  27. 27. Clark Qualitative Levels I. All tumor cells within the epidermis, superficial to basement membrane II. Tumor involves, but does not completely fill the papillary dermis III. Tumor fills the interface between papillary and reticular dermis IV. Tumor cells invade the reticular dermis V. Tumor involves subcutaneous tissue
  28. 28. Breslow Quantitative Stage < 0.75 mm 0.76 – 1.49 mm 1.50 – 3.99 mm > 4.0 mm
  29. 29. Significance of Breslow and Clark levels Breslow depth has been correlated with prognosis Clark levels are useful for differentiating lesions that are less than 1 mm in thickness (T1 lesions)
  30. 30. Other diagnostic tests FNA of suspicious lymph nodes Radiographic CXR CT head, neck, abdomen, pelvis as indicated MRI as indicated Laboratory Lactate dehydrogenase for distant metastasis
  31. 31. Cutaneous Melanoma Staging
  32. 32. Cutaneous Melanoma Staging
  33. 33. Cutaneous Melanoma staging
  34. 34. Cutaneous Melanoma Staging
  35. 35. Cutaneous Melanoma Staging
  36. 36. Cutaneous Melanoma Staging
  37. 37. Prognostic factors Thickness of primary lesion Presence or absence of ulceration (histologic) Number of metastatic lymph nodes Presence or absence of In transit disease Distant metastasis (skin, lung, visceral)
  38. 38. Definitive Treatment Wide local excision of melanoma Depends on size of lesion Melanoma in situ 0.5 cm margin < 1.0 mm, then 1 cm margin 1.0 – 2.0 mm, then 1 – 2 cm margin > 2.0 mm, then 2 cm margin Sentinel lymph node biopsy Therapeutic neck dissection Reconstruction
  39. 39. Staged incision technique Moller et al retrospective chart review of 49 patients with lentigo maligna (melanoma in situ) of the head and neck. Staged marginal and central incision technique 5 mm margin, then 2-3 mm marginal excisions After negative margins (7-10 days), performed excision of central specimen with reconstruction Moller et al, Annals of Surgical Oncology, 2009
  40. 40. Staged Incision Moller et al, Annals of Surgical Oncology, 2009
  41. 41. Staged incision Kept incisions within aesthetic facial units Reconstructed with FTSG, STSG, or rotational flaps 12% were upstaged to malignant melanoma No recurrences with 14 month follow-up Moller et al, Annals of Surgical Oncology, 2009
  42. 42. Lymph node assessment in melanoma 90% of patients with melanoma have no evidence of lymphadenopathy on presentation 20% have occult neck disease Elective neck dissection is no longer recommended due to morbidity of procedure Morton was the first to use sentinel lymph node biopsy for melanoma in 1992.
  43. 43. Sentinel Lymph node biopsy Ideally performed after excisional biopsy and concurrent with definitive wide local excision Radiocolloid is injected into four quadrants around the lesion 1-12hr prior to SLNB Lymphoscintogram identifies areas of uptake In the operating room, isosulfan blue is injected intradermally until a wheal forms. This forces the dye into the lymphatics McMasters et al Journal of surgical Oncology 2004;86:212-223
  44. 44. SLNB A gamma probe is used to identify “hotspots” and a 1- 3cm incision is made over the area of maximum radioactivity SLN has 3:1 ratio of radioactivity compared to background, and 10:1 ration when compared to non- sentinel node. Sentinel node will have blue color from dye, or the afferent lymphatics leading to the node will be blue. Nodal basin is carefully examined using the gamma probe, as more than one SLN may exist McMasters et al Journal of surgical Oncology 2004;86:212-223
  45. 45. SLNB It is important to continue dissection until the background count is less than 10% of the hottest node because metastases may be missed if the threshold is raised above 10%. For head and neck sites, it is important to excise the primary and its isotope blush before using gamma probe, due to overlapping drainage pathways. McMasters et al Journal of surgical Oncology 2004;86:212-223
  46. 46. Definition of False Negative for SLNB McMasters et al Journal of surgical Oncology 2004;86:212-223
  47. 47. Successful SLNB in Head and Neck Region Requires knowledge of the head and neck by surgeon as well as nuclear medicine specialist. Learning curve of 30 procedures for most head and neck surgeons Two probe system (technetium and blue dye) increases the sensitivity of SLNB. McMasters et al Journal of surgical Oncology 2004;86:212-223
  48. 48. Lymphoscintigraphy
  49. 49. Sentinel Lymph Node Mapping in Head and Neck Melanomas Schmalbach et al University of Michigan (2003) Retrospective cohort study with 80 patients Mean follow-up of 25 months, minimum f/u of 1 year All with cutaneous melanoma of head and neck and staged with SLNB  Tumor depth > 1.0 mm or  Tumor depth < 1.0 mm with poor prognostic variables  Ulceration  Extension to deep margin, or regression  Young age Schmalbach et al 2003
  50. 50. SLNM Reliability Patients underwent lymphoscintigraphy with Tc 99m sulfur colloid, intradermally in 4 quadrants. (2-4 hours prior to surgery) Isosulfan blue intradermally in the OR. 1-3 cm incision made over area of increased radioactivity, or preauricular incision for parotid lymph nodes LN evaluated with H&E staining, if this was negative, then would use S100, Melan-A, or HMB-45 Schmalbach et al 2003
  51. 51. SLNM Reliability SLN found in 96% of cases 74% in neck nodal basins and 24% in parotid basin Of the parotid basin, 28/30 (93%) patients underwent successful SLNB 17.5% had lymph node positive metastasis treated with modified radical, superficial parotidectomy, or posterolateral neck dissection. 4.5 % false negative rate (3/66 negative SLNB went on to have regional failure) These rates are comprable to SLNB in non-head and neck sites. Schmalbach et al 2003
  52. 52. Comparison of HNCM vs Melanoma at other sites (OMS) Agnese et al The Ohio State University (2007) performed study to assess outcome of cutaneous head and neck melanoma versus melanoma at other sites. Total of 755 patients underwent SLNB Tumor thickness > 1.0 mm Tumor thickness < 1.0 mm with poor prognostic factors  Ulceration, regression, or Clark level IV or V involvement Agnese et al 2007
  53. 53. SLNB in HNCM 131/755 (17.4%) of melanomas found in the head and neck Significantly more SLN’s in the head and neck group. Despite this, there was a lower percentage of positive nodes (9.2% vs. 16.0%) No notable difference in local, regional, or distant recurrence between groups. False negative rate 5.9% vs 4.4%, not significant HNM do not have a poorer outcome than OMS Agnese et al 2007
  54. 54. Recurrence and Survival after SLNB Gomez-Rivera et al 2008 M.D. Anderson Cancer Center Retrospective chart review of 113 patients with CHNM who underwent SLNB (1993-2004) 96% successful in finding SLN Follow-up 34 months, with 28% recurrence Same criteria as UM and OSU for performing SLNB Gomez-Rivera et al
  55. 55. Recurrence and survival 83 patients were part of a prospective study in which they underwent SLNB and neck dissection of the nodal basins (I-V, II-V, parotid, postauricular, and suboccipital) The remaining patients underwent SLNB, and therapeutic neck dissection if SLN was positive. Gomez-Rivera et al
  56. 56. Recurrence Location face > scalp > neck At least one SLN, median of 3 26% of SLN localized to non-predicted sites, especially lesions in the anterior scalp 32 (28%) patients developed recurrence 5/90 (5.5%) with negative SLNB, had recurrence Gomez-Rivera et al
  57. 57. Survival 5 year DFS was negatively affected by female sex, Breslow thickness 2-4 mm, Clark level IV or higher, and positive SLN 5 year OS was negatively affected by age greater than 60, Breslow 2-4 mm, Clark level IV, and positive SLN Concluded that tumor thickness and age were important factors in survival. (+) SLN showed a trend in intermediate thickness tumors for worse survival. Gomez-Rivera et al
  58. 58. Treatment of the Neck SLNB should be performed if there is no palpable nodal metastasis and the following criteria are met: > 1.0 mm thicknes < 1.0 mm thickness with poor prognostic factors  Ulceration  Clark level IV or V involvement  Significant regression of tumor
  59. 59. Treatment of the Neck Therapeutic neck dissection is carried out when there is positive nodal disease. This can be palpable, or node positivity from SLNB Levels of neck dissection depend on location of melanoma, but modified radical or selective neck dissection is preferred May need to dissect postauricular, suboccipital, or parotid nodes (superficial parotidectomy)
  60. 60. Treatment of Neck based on location of melanoma Face Forehead Auricle Anterior scalp Posterior scalp
  61. 61. Adjunctive therapy Interferon alpha-2b is the only FDA approved agent for therapy in high-risk patients (stage IIb and III). The largest group of high risk patients are those with nodal metastasis. Eastern Cooperative Oncology Group (ECOG) has had two trials which show disease free survival benefit with high dose interferon alpha-2b.
  62. 62. Adjunctive Therapy ECOG trial E1694 looked at interferon alpha-2b compared to ganglioside vaccine. Interferon had increased DFS and OS compared to vaccine All of these trials were in patients with bulky neck disease Sunbelt Melanoma Trial is looking at the role of adjunctive therapy in patients with intermediate disease, and micrometastasis to lymph nodes.
  63. 63. Adjuvant Interferon therapy
  64. 64. Pegylated IFN-alpha 2b Eggermont et al (2008) conducted a randomized phase III study comparing the pegylated IFN-alpha 2b to observation in stage III melanoma (EORTC 18991) 1256 patients (629 obs, 627 IFN) Median treatment length was 12 months Median follow-up 3.8 years Found improved RFS, but no change in OS Pegylated IFN offers less side effects (toxicity), and has benefit beyond the treatment duration. Best results in those with micrometastasis Eggermont et al, Lancet Vol 372
  65. 65. Radiation Therapy Reserved for stage IV disease, or disease with significant poor prognostic factors Neurotropism Greater than 4 node metastasis Extracapsular spread Recurrence Phase III clinical trial is on-going
  66. 66. Chemotherapy Melanoma is relatively chemoresistant Dacarbazine (DTIC) is the only approved agent Only 10-20% of people have a response and less than 5% of people have a complete response Reserved for Stage IV disease
  67. 67. Future Study There are a number of research protocols underway. Management of intermediate disease, and micrometastasis will benefit from randomized control trials Immunotherapeutic agents
  68. 68. Immunotherapy IL-2 is the only FDA approved cytokine for stage IV melanoma. 8 clinical trials have shown a 16% overall response rate, and 6% complete response IL-21 currently being investigated in phase I and II clinical trials Adoptive immunity – ex vivo activation and expansion of tumor-reactive lymphocytes taken from host, then reinfused into the patient Human igG monoclonal antibodies Iplimumab tremelimumab Eggermont AM and Schadendorf D, Hematol Oncol Clin N Am 23 (2009)
  69. 69. Immunotherapy Vaccines Autologous Allogeneic MAGE-3 (RCT stage IIIB and IIIC planned) Peptide based (ECOG 4697) Dendritic cell based (inconclusive data) Intratumoral gene transfer (Phase III trial planned) Eggermont AM and Schadendorf D, Hematol Oncol Clin N Am 23 (2009)
  70. 70. Summary Melanoma is the 5th and 6th most common causes of cancer in men, women in the United States It is highly curable at an early stage (85-90%) There are no good treatment options for late stage disease (Stage IV)
  71. 71. Summary The most important prognostic factors for intermediate melanomas are tumor thickness, presence of ulceration, and lymph node status. Sentinel lymph node biopsy is an important part of nodal staging to find micrometastasis Positive lymph node status upgrades to a stage III cancer (regional disease)
  72. 72. Summary Therapy remains wide local excision with margins for stages I - III, with the addition of neck dissection for stage III melanomas. Adjunctive therapy is available, but more trials are needed to discover more effective treatments for stage III and IV disease.
  73. 73. Bibliography  Agnese DM, Maupin R, Tilman B et al. Head and neck melanoma in the sentinel lymph node era. Arch Otolaryngol Head Neck Surg 2007,133(11):1121-1124  Autier P, Dore JF, Schifflers E, et al. Melanoma and use of sunscreens: an EORTC case-control study in Germany Belgium, and France. Int J Cancer 1995;61:749.  Autier P, Boniol M, Dore JF. Sunscreen use and increased duration of intentional sun exposure: still a burning issue. Int J Cancer 2007;121:1–5.  Balch CM et al. New TNM melanoma staging system: linking biology and natural history to Clinical outcomes. Seminars in Surg. Oncology 2003,21:43-52  Barnhill RL, Mihm MC, and Elgart G. Malignant Melanoma. Skin Cancer 1st ed 2008, Nouri K  Bottomley A et al. Adjuvant therapy with pegylated interferon alpha-2b versus observation in resected stage III melanomas: a phase III randomized control trial of health-related quality of life and symptoms by the European Organisation for Research and Treatment of Melanoma Cancer Group. J Clin Oncol 27:2916-2923  Doting EH, De Vries M, and Plukker J et al. Does Sentinel Lymph Node Biopsy in cutaneous Head and neck melanoma alter disease outcome. Journal of Surgical Oncology 2006,93:564-570  Easson AM, Rotstein LE and McReady DR. Lymph node assessment in melanoma. Journ of Surg Oncology 2009,99:176-185  Eggermont AMM. Melanoma and Immunotherapy. Hematol Oncol Clin N AM 2009:547-564  Eggermont AMM et al. Adjuvant therapy with pegylated interferon alpha-2b versus observation Alone in resected stage III melanoma: final results of EORTC 18991, a randomized phase III trial. The Lancet July 2008,372:117-126
  74. 74. Bibliography  Gomez-Rivera F, Santillan A, McMurphey AB et al. Sentinel lymph node biopsy in patients with cutaneous melanoma of the head and neck: recurrence and survival study. Head And Neck Oct 2008,1284-1293  Gillenwater, AM and Harrison LB ed. Ch 22 Melanoma of the Head and Neck. Head and Neck Cancer: A Multidisciplinary Approach. 3rd edition, 2009  Lin D, Franc BL, Kashani-Sabet M, amd Singer MI. Lymphatic drainage patterns of head and neck cutaneous melanoma observed on lymphoscintigraphy and sentinel lymph node biopsy. Head and Neck March 2006,249-255  McDermott et al. Double Blind Randomized Phase II study of the Combination of Sorafenib and Dacarbazine in patients with advanced melanoma/; A report from the 11715 Study Group J Clin Oncol 26:2178-2185  McMasters KM et al. Lessons learned from Sunbelt Melanoma Trial. Journ of Surg Oncology 2004,86:212-223.  Tanis PJ, Nieweg OE et al. Dilemma of clinically node-negative head and neck melanoma: Outcome of “watch and wait” policy, elective lymph node dissection and sentinel lymph Node biopsy- A Systemic Review. Head and Neck March 2008:380-389  Schmalbach CE, Nussenbaum B, Rees RS et al. Reliability of sentinel lymph node mapping with biopsy for head and neck cutaneous melanoma. Arch Otolaryngol Head and Neck Surgery Jan 2003,129:61-65  Schmalbach CE, Johnson TM, and Bradford CR. Ch. 23 The Management of Head and Neck Melanoma. Cummings: Otolaryngology Head and Neck Surgery, 4th ed., 2005  Wolf P, Donawho CK, Kripke ML. Effect of suncreens on UV radiation-induced enhancement of melanoma growth in mice. J Natl Cancer Inst 1994;86:99–105.
  75. 75. Thank you