Moffitt Weekends in Pathology Head & Neck, and Endocrine Pathology Course Outline
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1 Moffitt Weekends in Pathology Head & Neck, and Endocrine Pathology Course Outline Squamous Cell Lesions Lecture BMW: 8:30-9:15 Break: 9:15-9:30 Case Review LK: 9:30-10:15 Case Review JHP: 10:30-11:15 Break: 11:15-11:30
2 Moffitt Weekends in Pathology Head & Neck, and Endocrine Pathology Course Outline Salivary Gland Lesions Lecture JHP: 11:30-12:15 Lunch: 12:15-1:15 Case Review LK: 1:15-2:00 Case Review BMW: 2:00-2:45 Break: 2:45-3:00
3 Moffitt Weekends in Pathology Head & Neck, and Endocrine Pathology Course Outline Thyroid Lesions Lecture LK: 3:00-3:30 Case Review JHP: 3:30-4:15 Case Review BMW: 4:15-5:00 Audience Response Q & A 5:00-5:15
4 Premalignant Squamous Cell Lesions and Variants of Squamous Cell Carcinoma Weekend in Pathology Moffitt Cancer Center November 4, 2017
5 Head & Neck Squamous Cell Lesions Outline Keratinizing Dysplasia Squamous cell carcinoma: Microinvasive and Invasive Select Variants
6 Vocal cord
7 Floor of Mouth
8 Buccal Mucosa
9 Oral Leukoplakia
10 Vocal Cord Leukoplakia
11 Laryngeal Speckled Leukoplakia
12 Epithelial Alterations Histopathology (Hyper)keratosis Hyperplasia Dysplasia: Spectrum of architectural and cytological epithelial changes caused by a gradual accumulation of genetic changes with an increased likelihood of progression to squamous cell carcinoma
13 Criteria for Dysplasia 2017 WHO Blue Book
14 Dyskeratosis Keratin not on the surface Individual cell keratinization Keratin pearl(s) in the middle or lower half of the epithelium Pink or glassy cytoplasm Paradoxical maturation
15 Dyskeratosis
16 Dyskeratosis
17 Paradoxical Maturation
18 Keratosis without Dysplasia
19 Keratosis without Dysplasia
20 (Papillary or verrucoid) Keratosis without Dysplasia
21 Upper Aerodigestive Tract Epithelial Dysplasia Classic or Non-Keratinizing: Mild dysplasia Moderate dysplasia Severe dysplasia = Carcinoma in situ
22 Carcinoma In Situ
23 Upper Aerodigestive Tract Epithelial Dysplasia Keratinizing >>>> Nonkeratinizing: Mild dysplasia Moderate dysplasia Severe dysplasia
24 Keratinizing Mild Dysplasia
25 Keratinizing Mild Dysplasia
26 Keratinizing Moderate Dysplasia
27 Moderate? Severe? CIS?
28 Moderate? Severe? CIS?
29 Moderate? Severe? CIS?
30 Drop Off Carcinoma
31 Drop Off Carcinoma
32 Carcinoma In Situ (CIS) In the absence of full thickness intraepithelial dysplasia is the use of CIS justified? Does keratinizing severe dysplasia = CIS? Is it important to separate moderate and severe dysplasia/cis?
33 Upper Aerodigestive Tract Keratinizing Dysplasia Goal of any grading system is: Reproducible and Applicable Convey to the clinician the potential risk for progression of disease
34 Upper Aerodigestive Tract Grading Keratinizing Dysplasia Imprecise and subjective Preferred grading based on degree and extent of cellular and maturation alterations mild dysplasia moderate dysplasia severe dysplasia
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36
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38 Grading Keratinizing Dysplasia No statistical difference in progression to invasive SCC between keratinizing moderate dysplasia and keratinizing severe dysplasia/cis Justification to 2-Tier grading scheme: Low-grade Dysplasia = Mild dysplasia High-grade Dysplasia = Moderate Dysplasia, Severe Dysplasia, CIS Better reproducibility
39 Binary Grading Laryngeal Dysplasia 2017 WHO Blue Book
40 Binary Grading Oral Dysplasia 2017 WHO Blue Book
41 Keratinizing Dysplasia Etiology Tobacco (smoking, chewing) Alcohol Areca nut, with or without tobacco, causes oral submucous fibrosis with a relatively high frequency of oral dysplasia High risk human papillomavirus? Generally not considered a risk factor
42 Oral Dysplasia and High Risk Human Papillomavirus (HR-HPV) Presence of HR-HPV infection has been convincingly demonstrated in some oral keratinizing dysplasias*: Majority clinically oral leukoplakias Most adult men; Tongue > FOM >> other sites Karyorrhexis and apoptosis with brightly eosinophilic apoptotic cells throughout the thickness of the epithelium, surrounded by keratinocytes exhibiting conventional dysplastic changes Positive for p16 and high-risk HPV subtypes *Woo SB, et al. Modern Pathol 2013;26:
43 Oral Dysplasia and HR-HPV HR-HPV associated with a subset of severe epithelial dysplasia or carcinoma in situ characterized by: Most adult men; ventral tongue or FOM Diffuse loss of squamous differentiation & high proliferation index throughout basal and suprabasal epithelial layers Identified by p16 IHC staining followed by ISH with probes for HPV DNA McCord C, et al. Oral Surg Oral Med Oral Pathol Oral Radiol 2013;115:541-9
44 HR-HPV FOM Dysplasia
45 HR-HPV FOM Dysplasia
46 HR-HPV FOM Dysplasia p16
47 Keratinizing Dysplasia IHC Staining p16, p53 and Ki67 (MIB1): p16 of limited diagnostic utility in keratinizing dysplasias of the UADT p53: increase expression Ki67: increase intraepithelial proliferation rate through all epithelial layers Overall of limited utility
48 High-Grade Keratinizing Dysplasia Ki67 Ki67
49 Squamous Cell Carcinoma Early or Microinvasive Carcinoma Neoplastic cells penetrated basement membrane with invasion into submucosa Develops as a continuum from keratinizing high-grade dysplasia Classically defined CIS is not a prerequisite to the development of invasive carcinoma
50 Squamous Cell Carcinoma Microinvasive Carcinoma (MIC) No uniformity in defining MIC: small number of cells below BM invasion through the BM invasion through the BM limited to 1-2mm of BM without angioinvasion invasion no more than 0.5mm from epithelial BM with no angioinvasion
51 Invasive SCC Diagnostic Features Irregular shaped nests within the submucosa with associated dysplastic changes: Hyperchromasia; N:C; dyskeratosis; mitotic activity including atypical mitoses Desmoplasia Invasion: Lymph-vascular invasion; perineural invasion; invasion of soft tissues and/or bone Keratin granuloma formation
52 Invasive SCC
53 Invasive SCC
54 (Micro)Invasive SCC?
55 (Micro)Invasive SCC?
56 (Micro)Invasive SCC?
57 Keratin Granuloma AE1/AE3
58 Keratin Granuloma
59 CD68 AE1/AE3
60 HNSCC Factors Associated with Prognosis Adequacy of resection (surgical margins) Pattern of invasion: cohesive v dyscohesive Tumor size, thickness, location LVI, neurotropism and soft tissue invasion Regional metastasis - Extranodal Extension Distant metastasis Angiogenesis; Host immune response Second malignancy
61 Extranodal Extension
62 Variants of Squamous Cell Carcinoma of the Upper Aerodigestive Tract
63 Squamous Cell Carcinoma Variants Verrucous Carcinoma Spindle Cell Squamous Carcinoma Basaloid Squamous Cell Carcinoma Viral-Associated Carcinomas (HPV; EBV) Papillary (Exophytic) SCC Adenoid SCC (angiosarcoma-like or acantholytic) Adenosquamous Carcinoma Lymphoepithelial-like Carcinoma Other variants
64 Verrucous Carcinoma (VC) Highly differentiated variant of squamous cell carcinoma with locally destructive but not metastatic capabilities
65 Verrucous Carcinoma Clinical Features M > F; generally occurs in older age groups (6 th 7 th decades of life) Sites: oral cavity (4%) > larynx (1-3%) > other (sinonasal tract; nasopharynx) Symptoms vary according to site
66 Verrucous Carcinoma Etiology Tobacco (smoking, chewing) use HPV may play an active role in the multistep progression to cancer by binding (via protein products) to the RB gene product removing regulatory block in the cell cycle (Science 1989;243:934-7 Recent studies using highly sensitive and specific molecular methods suggest that VC is not associated with human papillomavirus infection
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68
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70 Hybrid Carcinoma Tumor showing mixed histology including verrucous carcinoma and conventional SCC Oral cavity > larynx >>> other sites Biologic risk that of conventional SCC potential for metastasis Treatment that of conventional SCC
71 Hybrid Carcinoma
72 Verrucous Carcinoma Biopsy Diagnosis Biopsy diagnosis of VC extremely difficult Adequate material is critical to interpretation and should include ample epithelial-stromal interface: Pathologists should not over interpret a verrucoid lesion as a carcinoma without adequate tissue Diagnosis of VC at initial presentation and biopsy is challenging given overall bland cytomorphology and shared features with reactive verrucoid lesions
73 Verrucous Carcinoma Biopsy Diagnosis Well-differentiated verrucoid squamous epithelial proliferation, NOS complete excision & follow-up Recurrence of tumor at a future time may be the most important clue/evidence to diagnosis of VC
74 Verrucous Carcinoma Differential Diagnosis Conventional squamous cell carcinoma Reactive verrucoid hyperplasia Proliferative verrucous leukoplakia (PVL) Papilloma
75 Proliferative Verrucous Leukoplaia
76 Verrucous Carcinoma Treatment and Prognosis Surgery is the treatment of choice Radiotherapy used in select settings Excellent prognosis: for laryngeal VC: 5-yr survival rates of 86-95% Local recurrence but no metastases may cause extensive destruction if left untreated Does not metastasize Hybrid carcinoma has potential for metastasis and should be treated as conventional SCC
77 Spindle Cell Squamous Carcinoma (SCSC) Variant of SCC characterized by prominent or even exclusive malignant spindle-shaped cell and/or pleomorphic cells with or without identifiable conventional squamous cell carcinoma component (intraepithelial dysplasia and/or invasive differentiated SCC) Synonym: Sarcomatoid carcinoma
78 SCSC Clinical Features Uncommon tumor type M >> F; primarily occurs in older age groups (6 th 8 th decades) Sites of occurrence: Larynx (TVC) > oral cavity > cutaneous > tonsil > pharynx, other Symptoms vary according to site Linked to tobacco and alcohol use/abuse No specific correlation with HPV
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81 Invasive differentiated SCC and malignant spindle-shaped cells = SCSC
82 Spindle cells Epithelioid cells
83 Granulation tissuelike appearance
84 Collagenized (hypocellular) SCSC
85 Spindle Cell Squamous Carcinoma IHC Staining Cytokeratins (AE1/AE3, CAM5.2, CK5/6, OSCAR) p63, p40 Vimentin Mesenchymal markers (actins, desmin)
86 AE1/AE3 CAM5.2 CK5/6 OSCAR
87 p63
88 Spindle Cell Squamous Carcinoma Keratin Expression 71 of 122 cases (58%) expressed keratin Lewis J, et al. Hum Pathol 1997;28:664-73
89
90 VIM
91 SMA
92 MSA
93 DES
94 Spindle Cell Squamous Carcinoma Epithelial Differentiation Identical p53 expression patterns in epithelial and spindle cell components support concept that phenotypically divergent cell populations share similar (epithelial) developmental pathway Ansari-Lari MA, et al. Am J Surg Pathol 2002;26:
95 Spindle Cell Squamous Carcinoma Sarcomas: Differential Diagnosis heterologous elements may be present in SCSC (e.g., rhabdomyosarcoma, osteosarcoma, chondrosarcoma) Inflammatory myofibroblastic tumor Reactive processes: myofibroblastic-based Inflammatory (e.g., contact ulcers) post-radiation changes
96 Spindle Cell Squamous Carcinoma Association with HPV Majority of SCSC not related to HPV Rare p16-positive oropharyngeal SCSC harboring HPV identified: Watson RF, Chernock RD, Wang X, Liu W, Ma XJ, Luo Y, Wang H, El-Mofty SK, Lewis JS Jr. Head Neck Pathol 2013;7:
97 Spindle Cell Squamous Carcinoma Treatment and Prognosis Surgical excision is the treatment of choice Adjunctive therapeutic modalities of questionable utility Prognosis dependent on clinical stage but overall prognosis is considered to be poor Metastasis to regional lymph nodes and to the lungs No known ameliorating effect associated with HPV
98 Basaloid Squamous Cell Carcinoma (BSCC) Biologically aggressive histologically high-grade variant of conventional squamous cell carcinoma characterized by invasive growth and predominantly composed of basaloid (pleomorphic) cell population and often limited evidence of squamous cell component
99 Basaloid Squamous Cell Carcinoma Clinical Features M > F; primarily occurs in older age groups (6 th 7 th decades) Sites of predilection: supraglottic larynx hypopharynx (piriform sinus) oropharynx: base of tongue and tonsil Symptoms vary according to site: at presentation tendency to be multifocal, deeply invasive and/or metastatic
100 Basaloid Squamous Cell Carcinoma Etiology Strongly related to alcohol and tobacco Non-oropharyngeal BSCC: Transcriptionally-active high risk human papillomavirus (HPV) is consistently absent in BSCC arising outside the oropharynx
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102
103 Lobular growth, comedonecrosis Reduplicated basement membrane-like material
104 BSCC - In Situ Component
105 BSCC with squamous differentiation
106 Rosettes and Nuclear Palisading
107 Perineural invasion
108 Basaloid Squamous Cell Carcinoma IHC Findings IHC: Cytokeratins p63/p40 (diffusely positive) Variable reactivity for S100 protein, NSE Mesenchymal: Vimentin, SMA Negative for neuroendocrine, melanocytic and lymphoid markers p16: Most non-oropharyngeal HPV-negative Most oropharyngeal HPV-positive
109 Basaloid Squamous Cell Carcinoma Differential Diagnosis Adenoid cystic carcinoma Small cell (neuroendocrine) carcinoma Conventional squamous cell carcinoma Adenosquamous carcinoma Spindle cell squamous carcinoma Others
110 Basaloid Squamous Cell Carcinoma Treatment and Prognosis Aggressive management: Complete surgical resection Radiotherapy and chemotherapy HPV-negative: dismal prognosis Active smokers and those with nodal metastases at presentation have worse prognosis Lymphatic and hematogenous spread: Regional lymph nodes (50-70%) Lung, bone, skin and brain
111 Basaloid Squamous Cell Carcinoma HPV-positive: Better overall prognosis than histologically similar non-hpv associated head and neck BSCC (Am J Surg Pathol 2008;32: ) Any tumor appearing to arise in the larynx/hypopharynx but that involves the oropharynx should be tested for HPV (p16)
112 Viral-Associated Head and Neck Squamous Cell Carcinoma (SCC) Oropharyngeal HPV-associated squamous cell carcinoma (WHO 2017 SCC, HPV-positive) Nasopharyngeal EBV-associated squamous cell carcinoma
113 MRI T1 T2
114 FNAB Metastatic poorly-differentiated carcinoma favor squamous cell carcinoma
115 PET/CT
116 Base of Tongue (BOT) Bx Biopsy
117 BOT Biopsy
118 CAM5.2 p16
119 Diagnosis Oropharyngeal (Tonsillar) Carcinoma: Poorly-differentiated squamous cell carcinoma Squamous cell carcinoma with basaloid features Nonkeratinizing carcinoma
120 Nonkeratinizing Carcinoma Human Papillomavirus (HPV) Oropharyngeal Carcinoma (HPV-associated SCC)
121 HPV-positive SCC vs HPV-negative SCC HPV-positive SCC HPV-negative SCC Incidence Increasing Stable to decreasing Age Younger Older Gender M = F M > F Race Caucasian >>>> African American African American > Caucasian Risk factors HPV Smoking, alcohol Primary location Oropharynx (base of tongue; tonsil) All mucosal sites of the UADT Histology Nonkeratinizing SCC Keratinizing SCC p16 Positive Negative AJCC staging (TNM) ChemoXRT response Prognosis Lower T, higher N Good with low rate of recurrence Better disease-free and overall survival (worse if smokers) Higher T, lower N Good with high rate recurrence Worse disease-free and overall survival
122 Cystic Tonsillar Crypt NK Carcinoma
123 Cystic Tonsillar Crypt NK Carcinoma p16
124 Cystic Neck Mass
125 Cystic Neck Mass p16
126 Hybrid Oropharyngeal SCC (OPSCC) p16
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128
129 p16 p16
130 Ciliated HPV-Associated Carcinoma (aka Ciliated Adenosquamous Carcinoma) Bishop JA, Westra WH. Am J Surg Pathol 2015;39: Radkay-Gonzalez L, et al. Head Neck Pathol 2016;10:
131 Oropharyngeal Reticulated Epithelium
132 Oropharyngeal Reticulated Epithelium Immunohistochemistry AE1/AE3 p16
133 Tonsillar Crypt with Carcinoma CIS p16
134 HPV 16 p16 immunostaining and/or HPV DNA (ISH, PCR) correlates to the presence of HPV16 Representing a reliable predictor of origin from the oropharynx
135 Guidelines for the Detection of High Risk (HR)-HPV in H&N SCC College of American Pathologists (2017) The tumors of all adults presenting with oropharyngeal SCC should be tested for HR- HPV Neck nodal tissue from all patients with metastatic SCC of unknown primary should be tested for HR-HPV Staining with IHC p16 should be used as an initial screening method (70% cut off)
136 Guidelines for the Detection of High Risk (HR)-HPV in H&N SCC When to Test All newly diagnosed oropharyngeal squamous cell carcinomas (from primary or metastasis) All carcinomas of unknown primary presenting as neck metastases Don ts: Other sites: not currently recommended Low-risk HPV
137
138 Nasopharyngeal Carcinoma (NPC) WHO Classification (2017) Keratinizing SCC: well-, moderately, poorly-differentiated (WHO 1) Nonkeratinizing SCC: Differentiated type (Transitional Cell or Cylindrical Cell Carcinoma; WHO 2) Undifferentiated type (Lymphoepithelioma; WHO 3) Basaloid SCC
139 Percent Sex/Age EBV XRT Respons e 5-Yr survival Nasopharyngeal Carcinoma (NPC) Keratinizing Approximately 25% M > F; 4 th - 6th decades Weak association Radioresponsiveness is not good Nonkeratinizing Differentiated Least common < 15% M > F; 4 th - 6th decades Strong association Radioresponsive Nonkeratinizing Undifferentiated Most common > 60% M > F; 4 th - 6th decades; may occur in children Strong association Radioresponsive 20-40% 75% 75%
140 NPC, nonkeratinizing differentiated EBER
141 NPC, nonkeratinizing undifferentiated
142 Where is the carcinoma?
143 NPC, nonkeratinizing undifferentiated
144 NPC, nonkeratinizing undifferentiated AE1/AE3 p63 EBER
145 Nasopharyngeal Carcinoma Differential Diagnosis Non-Hodgkin lymphoma (DLBCL) Mucosal malignant melanoma Mesenchymal (e.g., rhabdomyosarcoma)
146 Cervical Neck Lymph Node Topography
147 Site Specific Lymph Node Drainage
148 Metastatic Cervical Carcinoma with an Unknown Primary Tumor (MCCUP) Definition: - Overt neck mass harboring a cytologically or histologically proven metastatic carcinoma in the absence of signs and symptoms of a primary neoplasm or of a clinically detectable mass: no history of previous malignancy or cancer ablation of any indeterminate lesion no history of definite symptoms related to a specific organ system no clinical or laboratory evidence of a primary neoplasm
149 Luna MA. Chapter 17. In: Barnes L, ed. Surgical Pathology of the H&N. 2009
150 Luna MA. Chapter 17. In: Barnes L, ed. Surgical Pathology of the H&N. 2009
151 Waldeyer Tonsillar Tissues
152 Luna MA. Chapter 17. In: Barnes L, ed. Surgical Pathology of the H&N. 2009
153 Branchiogenic Carcinoma Criteria* Cervical tumor occurs along line extending from anterior to the tragus along the anterior border of the SCM to the clavicle Histology c/w origin from tissue known to be present in branchial vestige No primary source for carcinoma on at least 5-year f/u Histologic evidence of carcinoma arising in wall of epithelial-lined cyst *Martin et al. Ann Surg 1950;132:
154 Branchial Cleft Cyst Benign lateral neck cyst most often of 2 nd branchial cleft apparatus Bimodal age: (75%); <5 yrs (20%): - rare ( 5%) in ages >40 years Painless cervical swelling typically near angle of mandible along border of SCM
155 Branchial Cleft Cyst p16 p16 p16
156 AJCC Staging 8 th Edition HPV-mediated (p16+) Oropharyngeal Cancer (Chapter 10): - Descriptor poorly-differentiated at odds with known improved prognosis so use should be avoided - Use of the designation oropharyngeal SCC, nonkeratinizing type is recommended - Histologic grading is not relevant - Presence of keratinization in a p16+/hr HPV+ carcinoma does not exclude using this staging system - Cervical lymph node metastases (to level II/III) from unknown primary tumor (pt0) that is p16+ and histology is consistent with HPV-mediated carcinogenesis are staged according to the guidelines in this chapter - Diagnosis of malignant transformation of branchial cleft cyst should be rejected
157 Thank you
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