Slide Seminar of the Head and Neck Session of the European Congress of Pathology Bilbao, Spain, 2018.
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1 Slide Seminar of the Head and Neck Session of the European Congress of Pathology Bilbao, Spain, Prof Sulen Sarioglu, MD Dokuz Eylul University Faculty of Medicine Department of Pathology Graduate School of Health Sciences Department of Molecular Pathology Izmir, Turkey
2 Enterprise Interest None
3 Many Thanks to the Congress Organizing Committee ESP Head and Neck Pathology Working Group
4 Case that might be presented - EBER (+) metastatic carcinoma to the neck Primary is not nasopharynx but parotid gland!!! - Triple masses of a patient: at the nasopharynx, neck and parotid gland. Nasopharyngeal bx: EBER+ carcinoma and FNA from the parotid gland: not high grade, probably malignant tumor EBER (-) proving to be intraductal carcinoma after parotidectomy. Neck dissection was not performed as the metastatic neck masses were accepted from nasopharyngeal primary. - Verrucous carcinoma of the maxillary sinus arising from Inverted papilloma; infiltrating the hard palate (Nice case I prefer this one) - Isolated neurofibroma of the band ventricle - Myxoma of the middle ear. - The chosen case (I ll present now)
5 My case Is not very rare Is not the greatest diagnostic challange Is not prognostically important Is not very unexpected The problem is What is the name of the lesion?
6 60-year-old male patient A history of left parotid region swelling of three years duration. No pain 30 package/year smoking: quitted 18 years ago.
7 mss Axial, contrast computed tomography P: Parotid gland mss: masseter muscle *: Mass Arrow: The deliniation of the mass from the parotid gland mss * p p
8 FNA ow-grade neoplasm, n adenoma
9 Superficial parotidectomy was performed and 27x25x22 mm nodular mass was observed at the macroscopic examination.
10
11
12 Basal cell adenoma? Myoepithelioma reticular Pattern?
13 Palisading Pattern
14 Pan Keratin DOG-1 Actin Actin
15 Myoepithelioma?
16 Pan-cytokeratin p63 S100 CK5/6 Actin
17 Oncocytoma
18 S100 (-) oncocytic cells PTAH (+) MITO Actin (-) oncocytic cells p63 (-) oncocytic cells
19 Clear cell adenoma/carcinoma? PAS
20 Sebasceous metaplasia?
21 PAS S100 Actin
22
23 Sebasceous, oncocytic, squamous metaplastic regions
24 Squamous metaplasia
25 Keratin Aktin S100
26 ki67
27 Summary (HC, IHC) Muci carmine (-), CK20 (-), DOG-1(-), β- catenin (-), CK43 (-) Basal cell adenoma? Myoepithelioma? Clear cell tm? Oncocytoma? Sebasceous? PTAH/MITO PAS BM like material - BM like material - - Pan-CK Luminal+++, patchy Patchy Patchy + + CK7-CK5/6 ++ Focal S100/SOX10 Luminal++, patchy+ Strong/Patchy Actin/Calponin Abluminal++, Patchy GFAP Focal p63 Luminal++, patchy
28 What is your diagnosis?
29 Oncocytoma Myoepithelioma Basal cell adenoma Sebaceous adenoma >90% 50-90% 10-50% <10% CK7, CK8, CK18, CEA, GATA-3 S100, CK5/6/14, CALPONİN, SOX10, Vimentin Luminal: CK7, CK8, CK18, EMA Myoepithelial: S100, actin, calponin, vimentin, CK5/6/14, p63 Adipophilin, EMA P63 CK19, EMA, P63, GFAP, Actin, caldesmon CEA Perilipin, CK5/14, CK8/18, CK7, CK19, CD15 Actin CEA, CK7 CD43, Vimentin CK20, CEA, S100 Tuffaha MSA, Guski H, Kristiansen G eds. Salivary Gland Tumors in: Immunohistochemistry in tumor diagnostics Springer Nature, 2018
30 Basal Cell Adenoma of salivary gland tumors; years, female predominance >80% parotid gland FNA: basaloid cells with round-oval nuclei, scant cytoplasm 8p22, 19q13.4, 16q12-13, t7;13, inv(13) Pattern: solid, trabecular, tubular and membranous Basaloid cells with palisading at the periphery of the cell groups. PAS positive basement mambrane like material Centrally located cells may have larger cytoplasm, but the rest have scant cytoplasm and indistinct cell borders.
31 Basal Cell Adenoma May be associated with oncocytic and squamous metaplasia The membranous patterned tumors resemble the dermal anlage tumor and the two tumors may be associated and 16q12.1, CYDL LOH/mutation; Brooke-Spiegler Syndrome. CTNNB1 mutation is identified in tubule-trabecular variant Basal cell adenoma may be associated with oncocytic and squamous metaplasia (10,11). Luminal cells are positive for CK7, CK8, CK18, EMA while myoepithelial cells express S100, actin, calponin, vimentin, CK5/6/14, p63 as well as CEA is expected to be positive. CD117, CD43 and vimentin may be rarely positive. -Tuffaha MSA, et al. eds. Salivary Gland Tumors in: Immunohistochemistry in tumor diagnostics Springer Nature, 2018; Choi HR, et al. Molecular analysis of chromosome 16q regions in dermal analogue tumors of salivary glands: a genetic link to dermal cylindroma? Am J Surg Pathol Jun;26(6): Jo VY, et al. Distinctive Patterns of CTNNB1 (β-catenin) Alterations in Salivary Gland Basal Cell Adenoma and Basal Cell Adenocarcinoma. Am J Surg Pathol Aug;40(8): Dardick I, et al. Differentiation and the cytomorphology of salivary gland tumors with specific reference to oncocytic metaplasia. Oral Surg Oral Med Oral Pathol Oral Radiol Endod Dec;88(6): Paker I, et al. Basal cell adenoma with extensive squamous metaplasia and cellular atypia: a case report with cytohistopathological correlation and review of the literature. Diagn Cytopathol Jan;40(1):48-55.
32 Myoepithelioma 1.5% of salivary gland tumors; 9-85 years, female=male >80% parotid gland FNA: bland cells which may be spindled, epitheloid or plasmacytoid. Cells: Spindle, plasmacytoid, hyaline, epitheloid, clear cell, signet ring cell Patterns: Epitheoloid, organoid, reticular
33 Myoepithelioma Cell types: Plasmocytoid (most frequently), hyaline, epitheloid, clear cells (glycogen rich) arranged in nests and cords; Pattern: Glandular structures and chondromyxoid stromal elements should be sparse if any. *Reticular pattern may mimic basal cell adenoma, which is recognized by net-like arrangement of interconnected cell cords. Rare cases with oncocytic or lipomatous metaplasia and signet ring shaped (mucin rich) cells may be observed. Smooth muscle actin expression is strong in spindle cells but negative in plasmocytoid and clear cells. Cases with positive S100, CK5/6/14, CALPONİN, SOX10, Vimentin CK19, EMA, P63, GFAP, actin, caldesmon expressions are frequent while CEA, CK7 may also be positive. Not many mutations, aberrations at chromosome 8 - Skálová A, et. al. Oncocytic myoepithelioma and pleomo rphic adenoma of the salivary glands. Virchows Arch Jun;434(6): Skálová A, et al. Spindle cell myoepithelial tumours of the parotid gland with extensive lipomatous metaplasia. A report of four cases with immunohistochemical and ultrastructural findings. Virchows Arch Dec;439(6): Gnepp DR. Mucinous myoepithelioma, a recently described new myoepithelioma variant. Head Neck Pathol Jul;7 Suppl 1:S Tuffaha MSA, et al. eds. Salivary Gland Tumors in: Immunohistochemistry in tumor diagnostics Springer Nature, 2018;
34 Oncocytoma Large granular eosinophilic cytoplasm and vesicular nuclei PTAH or MITO positivity reflects thousands of mitochondria many times the normal amount. Focal or extensive clear cell changes may be seen related to cystic dilatation of the mitochondria. The oncocytes are vulnerable to trauma and this may be the reason for frequent squamous metaplasia. Impairment of mitochondrial genes (OXPHOS) seem to induce the proliferation of the mitochondria; either related to low protein expression or mutations. In neoplasms, the mutations are not restricted to the mitochondrial genes; probably the high concentration of reactive oxygen species related to mitochondrial malfunction, lead to the mutations of the cellular DNA. These alterations may lead to malignant transformation. *In tumors with partial oncocytic changes, the mitochondrial changes are probably acquired following cellular DNA changes. - Máximo V, et al. Oncocytic lesions of the thyroid, kidney, salivary glands, adrenal cortex, and parathyroid glands. Int J Surg Pathol Feb;22(1): Correia M, et al. Etiopathogenesis of oncocytomas. Semin Cancer Biol Dec;47:82-94.
35 Sebaceous Adenoma Sebaceous cell nests in a fibrous stroma is the typical morphology. Squamous and oncocytic metaplasia is frequent. Adipophilin, EMA perilipin, CK5/14, CK8/18, CK7, CK19, CD15 expression is frequent but CK20, CEA, S100 is positive in rare cases. - Tuffaha MSA, et al. eds. Salivary Gland Tumors in: Immunohistochemistry in tumor diagnostics Springer Nature, 2018;
36 Metaplasia What is metaplasia? - Stem cell origin? - Epigenetic changes? - Relation with dysplasia?
37 Metaplasia in salivary gland tumors Microdissection of oncocytic metaplastic and non metaplastic regions of a pleomorphic adenoma Microarray based comperative genomic hybridization A similar amplification in both components, mapping to 12q13.3 q21.1, which was further validated by chromogenic in situ hybridisation (A hotspot region for PA). The foci of oncocytic metaplasia showed an additional low-level gain of 6p. Di Palma S, et al. Oncocytic change in pleomorphic adenoma: molecular evidence in support of an origin in neoplastic cells. J Clin Pathol May;60(5):492-9.
38 How do we diagnose?
39 Approach with focus on Patterns of Recognition Basaloid Markers: p63, p40 Myoepithelial markers: SMA, S100, Calponin Five broad categories of salivary gland tumors: Acinar differentiation: Acinic cell carcinoma Biphasic ductal and myoepithelial differentiation: Mimicking intercaleted ducts; pleomorphic adenoma, basal cell adenoma, intercaleted duct adenoma, carcinoma ex pleomorphic adenoma, epithelial-myoepithelial carcinoma, adenoid cystic carcinoma, basal cell adenocarcinoma Oncocytic features: Mimicking striated ducts; Warthin s tumor, oncocytoma, oncocytic carcinoma Epidermoid and glandular features: Mimicking excratory ducts; salivary duct carcinoma, clear cell carcinoma, adenocarcinoma NOS, mucoepidermoid carcinoma Myoepithelial: Polymorphous adenocarcinoma, myoepithelioma, myoepithelial carcinoma Katabi N, Xu B. Salivary Gland Neoplasms: Diagnostic Approach with focus on Patterns of Recognition and useful ancillary tools Mini-Symposium: Head and Neck Pathology Diagnostic Histopathology 24:5
40 Strict diagnostic criteria in salivary tumors?
41 IHC in salivary gland tumors Ductal: epithelial-luminal cells: LMWK: CAM5.2, EMA, CK7, CK19 Basaloid Markers: p63, p40 Myoepithelial (abluminal) HMWK: CK5/6, 34βE12, p63, p40 and SMA, SOX10, S100, Calponin, GFAP Biphasic or monophasic pattern may be appreciated Myoepithelioma: One cytokeratin marker and a myoepithelial marker: S100 and/or SOX10 Squamous differentiation; Clear cell carcinoma, Mucoepidermoid carcinoma: HMWK (CK5/6, 34βE12) and p40, p63 S100 positive: exclude: Salivary duct carcinoma, clear cell carcinoma, mucoepidermoid carcinoma Androgen receptor +: Salivary duct carcinoma (75%-95%+) P63+/p40-: Secretory carcinoma, Polymorphous adenocarcinoma P63-/p40-: Salivary duct carcinoma P63+/p40+: Adenoid cystic carcinoma SOX10: Usually negative in salivary duct carcinoma, clear cell carcinoma, lymphoepithelial carcinoma, oncocytoma, oncocytic carcinoma, Warthin tumor. Positive in pleomorphic adenoma, epithelial myoepithelial carcinoma, basal cell adenoma and basal cell adenocarcinoma S100 negative but SOX10 positive mucoepidermoid carcinoma and acinic cell carcinoma Katabi N, Xu B. Salivary Gland Neoplasms: Diagnostic Approach with focus on Patterns of Recognition and useful ancillary tools Mini-Symposium: Head and Neck Pathology Diagnostic Histopathology 24:5
42 Diagnosis There is adenocarcinoma, NOS There isn t adenoma, NOS There is polymorphous adenocarcinoma There isn t polymorphous adenoma
43 Myoepithelioma with metaplasia and some unexpected patterns
44 Thanks for your attention
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