Differential Diagnosis of Oral Masses. Palatal Lesions
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1 Differential Diagnosis of Oral Masses Palatal Lesions
2 Palatal Masses Periapical Abscess Torus Palatinus Mucocele Lymphoid Hyperplasia Adenomatous Hyperplasia Benign Salivary Neoplasms Malignant Salivary Neoplasms Mesenchymal Neoplasms MALT Lymphoma Carinoma (Verrucous, Antral)
3 Apical Palatal Abscess Carious, nonvital tooth Spread of infection from palatal root Fluctuant or compressible Off midline Purulent aspirate Pain
4 Palatal Abscess
5 Torus Palatinus Onset during adulthood Females>Males Quite variable in size Tendency for lobulation Midline localization Bone hard to palpation Other exostoses may be present Remove for Prosthetic reasons
6 Midline Hard Palate Torus Palatinus
7 Reactive Lesions of Palatal Gingiva Pyogenic Granuloma Peripheral Fibroma Peripheral Ossifying Fibroma Peripheral Giant Cell Granuloma
8 Pyogenic Granuloma
9 Mucocele Soft Palate, Fauces
10 Hyperplastic Tonsillar Tissue
11 Adenomatous Hyperplasia Overgrowth of normal salivary tissue (acini and ducts) Soft to palpation Adults Mistaken for salivary tumor clinically Biopsy to confirm diagnosis
12 Adenomatous Hyperplasia
13 Benign Salivary Tumors Pleomorphic Adenoma Myoepithelioma Monomorphic Adenoma Basal Cell Adenoma
14 Pleomorphic Adenoma Encapsulated Capsule may fuse to periostium Extracapsular invasion is common Wide histologic variation Ductal and myoepithelial component Heterogeneous Pleomorphic stroma Myxoid, Cartilage, bone, fat Enucleation, subperiosteal dissection Low Recurrence in Palate
15 Pleomorphic Adenoma
16 capsule Mixed Tumor
17 Pleomorphic adenoma Plasmacytoid Myoepithelial Cells Tyrosine Crystals
18 Malignant Salivary Tumors Mucoepidermoid Carcinoma Polymorphous Low Grade Adenocarcinoma Adenoid Cystic Carcinoma Adenocarcinoma (NOS) Rare Adenocarcinomas Epithelial-Myoepithelial Carcinoma Carcinoma ex Mixed Tumor Salivary Duct Carcinoma Adenosquamous Carcinoma
19 Mucoepidermoid Carcinoma Midlife, yet may occur at young age Behavior varies with histologic grade Low Grade: Nonmetastasizing Intermediate Grade High Grade: Behavior Similar to Squamous Cell CA Wide local excision including bone Evaluation of neck for metastasis Clinical MRI, nodes > 1.0 cm positive
20 Mucoepidermoid Carcinoma
21 Low Grade Polymorphous AdenoCA Nonencapsulated Often misdiagnosed as Adenoid Cystic Carcinoma Histologic variations Solid nests, cribriform, perineural, Indian file, papillary cystic, tubular Wide local excision Metastases Nodal, more common with papillary patterns histologically (15%) Distant (8%)
22 Polymorphous Low Grade AdenoCA
23 Adenoid Cystic Similar histology to PLGA Recurrence and Metastasis Histology Tubular, Solid, Cribriform Stromal hyalinization Wide local excision Neck node assessment Clinical MRI, nodes > 1.0 cm positive
24 Adenoid Cystic Carcinoma
25 Adenocarcinoma, NOS Histologically not distinctive Ductal differentiation Most are intermediate to high grade Local and Distant Metastases Wide local excision, Radiation
26 Various Adenocarcinomas Myoepithelial Carcinoma Polymorphous low grade adenocarcinoma
27 Mesenchymal Neoplasms Benign Traumatic Fibroma (Fibrous Hyperplasia) Nerve Sheath Tumors Granular Cell Tumors (Soft Palate) Malignant MALT Lymphoma All sarcomas are very rare
28 Inflammatory Papillary Hyperplasia)
29 Fibroma, Pyogenic Granuloma
30 Atypical Lymphoreticular Disease of the Palate (MALT Lymphomas) Low Grade Malignancies Diffuse soft swelling hard and soft palate junction Histology Diffuse or Nodular Plasmacytoid/Histiocytoid May show benign lymphoepithelial lesion Radiation Therapy
31 Atypical Lymphoproliferative Lesion
32 Atypical Lymphoreticular Lesion diffuse follicular
33 IHC Markers Lymphoma Bcl=2 oncogene
34 IHC Lymphoma CD 20 B Lymphocytes
35 MALT Lymphoma Lymphoepithelial Lesion Pattern
36 Carcinoma Squamous Cell CA is rare in palate Soft Palate>Hard Palate Verrucous Carcinoma Palate, alveolar ridge White or pink, verrucous or papillary Antral Carcinoma Palatal perforation, oral mass Often ulcerated Most are Squamous Cell CAs or SNUC
37 Squamous Cell CA Papillary Variant Moderately Differentiated, SCCA Spindle Cell Carcinoma
38 Antral Squamous Cell CA
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