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Images
Figure 3-7
Published: 01 June 2025
PAPILLARY CRANIOPHARYNGIOMA Figure 3-7 PAPILLARY CRANIOPHARYNGIOMA A: Low magnification of a papillary-shaped nonkeratinizing squamous epithelial lesion. B: The lesion surrounds a fibrovascular core. C: Immunohistochemistry for BRAF p.V600E is positive in tumor cells. More about this image found in PAPILLARY CRANIOPHARYNGIOMA A: Low magnification of a papillary-shaped non...
Images
Figure 3-25
Published: 01 June 2025
PRIMARY NON-HODGKIN LYMPHOMA OF THE NASOPHARYNX Figure 3-25 PRIMARY NON-HODGKIN LYMPHOMA OF THE NASOPHARYNX Lymphomas are infrequent in the nasopharynx. A,B: Diffuse large B-cell lymphoma is the most common type of non-Hodgkin lymphoma involving the nasopharynx, shown here replacing the stroma More about this image found in PRIMARY NON-HODGKIN LYMPHOMA OF THE NASOPHARYNX Lymphomas are infrequent i...
Images
Figure 4-77
Published: 01 June 2025
NON-HODGKIN LYMPHOMA OF THE ORAL CAVITY Figure 4-77 NON-HODGKIN LYMPHOMA OF THE ORAL CAVITY A,B: The lymphoma presents as an extranodal swelling and ulceration involving the palate (A) and the gingiva (B). More about this image found in NON-HODGKIN LYMPHOMA OF THE ORAL CAVITY A,B: The lymphoma presents as an e...
Images
Figure 5-18
Published: 01 June 2025
PRIMARY INTRAOSSEOUS CARCINOMA (PIOC) Figure 5-18 PRIMARY INTRAOSSEOUS CARCINOMA (PIOC) An asymmetric, non-corticated but well-defined radiolucency is seen in the left maxilla. More about this image found in PRIMARY INTRAOSSEOUS CARCINOMA (PIOC) An asymmetric, non-corticated but we...
Images
Figure 5-188
Published: 01 June 2025
MALIGNANT MESENCHYMAL NEOPLASM Figure 5-188 MALIGNANT MESENCHYMAL NEOPLASM The sine qua non for diagnosis is demonstrating tumor osteoid produced by the malignant cells. More about this image found in MALIGNANT MESENCHYMAL NEOPLASM The sine qua non for diagnosis is demonstra...
Images
Figure 7-12
Published: 01 June 2025
BENIGN ENLARGED CERVICAL LYMPH NODES Figure 7-12 BENIGN ENLARGED CERVICAL LYMPH NODES A–C: Reactive lymphoid hyperplasia shows a polymorphous population of lymphocytes, tingible body macrophages, and lymphohistiocytic aggregates. D: Non-necrotizing granulomatous inflammation can be associated More about this image found in BENIGN ENLARGED CERVICAL LYMPH NODES A–C: Reactive lymphoid hyperplasia sh...
Book Chapter

Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 22
Published: 01 June 2025
10.55418/9781933477619-7
ISBN: 978-1-933477-61-9
... to the neck from non-head and neck sites, particularly renal cell carcinoma, can be confused with paraganglioma. These have cytokeratin and PAX8 positivity, however, and usually there is a clinical history of malignancy. SCLEROSING PARAGANGLIOMA Figure 7-9 SCLEROSING PARAGANGLIOMA Some paragangliomas have...
Book Chapter

Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 22
Published: 01 June 2025
10.55418/9781933477619-3
ISBN: 978-1-933477-61-9
..., especially the undifferentiated form, can present a challenge owing to its high-grade appearance, dispersed cell pattern, and association with stromal lymphoid tissue. The differential diagnosis of nonkeratinizing NPC is broad and includes large cell non-Hodgkin lymphomas, sinonasal undifferentiated...
Book Chapter

Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 22
Published: 01 June 2025
10.55418/9781933477619-2
ISBN: 978-1-933477-61-9
... positive for p40 and 2/3 (66 percent) for CK5/6 ( 38 ). The main differential diagnosis for non-keratinizing HPV-associated SCC is small cell carcinoma. Oropharyngeal SCCs are negative for chromogranin and are rarely positive for synaptophysin and CD56, making these reliable markers of bona fide...
Book Chapter

Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 22
Published: 01 June 2025
10.55418/9781933477619-5
ISBN: 978-1-933477-61-9
... INTRAOSSEOUS CARCINOMA (PIOC) Figure 5-18 PRIMARY INTRAOSSEOUS CARCINOMA (PIOC) An asymmetric, non-corticated but well-defined radiolucency is seen in the left maxilla. Microscopic Findings. Most PIOCs are squamous cell carcinomas (SCCs) showing some degree of cytologic atypia with the full range...
Book Chapter

Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 22
Published: 01 June 2025
10.55418/9781933477619-4
ISBN: 978-1-933477-61-9
... is highly variable, ranging from small asymptomatic cancers that mimic other non-cancerous oral lesions, to depressed, ulcerated lesions, to fungating masses ( fig. 4-4 ). Approximately 40 percent of patients with OSCC present with spread to regional/cervical lymph nodes. Distant metastases are uncommon...
Book Chapter

Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 22
Published: 01 June 2025
10.55418/9781933477619-1
ISBN: 978-1-933477-61-9
..., and hypophysis. Histologically, the paranasal sinuses are lined by the same ciliated pseudostratified respiratory-type epithelium seen in the nasal cavities. The mucosa in the paranasal sinuses is thinner and less vascular, and has fewer seromucinous glands than the nasal cavity. NON-NEOPLASTIC TUMOR-LIKE...
Book Chapter

Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 22
Published: 01 June 2025
10.55418/9781933477619-8
ISBN: 978-1-933477-61-9
...) is a non-neoplastic inflammatory degenerative process of the external ear characterized by necrobiotic changes in the dermis and perichondrium, with associated alterations in the cartilaginous plate ( 60 , 61 ). It does not seem that the cartilage is the primary source of the disorder, since similar...
Book Chapter

Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 22
Published: 01 June 2025
10.55418/9781933477619-6
ISBN: 978-1-933477-61-9
.... Lewis   JS   Jr . Spindle cell lesions—neoplastic or non-neoplastic?: spindle cell carcinoma and other atypical spindle cell lesions of the head and neck . Head Neck Pathol   2008 ; 2 : 103 - 10 . 13. Thompson   L . Larynx contact ulcer . Ear Nose Throat J   2005 ; 84 : 340 . 14...
Images
Figure 5-38
Published: 01 June 2025
UNILOCULAR AMELOBLASTOMA Figure 5-38 UNILOCULAR AMELOBLASTOMA More about this image found in UNILOCULAR AMELOBLASTOMA
Images
Figure 5-39
Published: 01 June 2025
MULTILOCULAR AMELOBLASTOMA Figure 5-39 MULTILOCULAR AMELOBLASTOMA More about this image found in MULTILOCULAR AMELOBLASTOMA
Images
Figure 5-40
Published: 01 June 2025
MULTILOCULAR AMELOBLASTOMA Figure 5-40 MULTILOCULAR AMELOBLASTOMA More about this image found in MULTILOCULAR AMELOBLASTOMA
Images
Figure 5-192
Published: 01 June 2025
OSTEOSARCOMA Figure 5-192 OSTEOSARCOMA MDM2 reactivity in an osteosarcoma. More about this image found in OSTEOSARCOMA MDM2 reactivity in an osteosarcoma.
Images
Figure 4-1
Published: 01 June 2025
ANATOMY OF THE ORAL CAVITY Figure 4-1 ANATOMY OF THE ORAL CAVITY More about this image found in ANATOMY OF THE ORAL CAVITY
Images
Figure 5-16
Published: 01 June 2025
AMELOBLASTIC CARCINOMA Figure 5-16 AMELOBLASTIC CARCINOMA SOX2 immunoreactivity. More about this image found in AMELOBLASTIC CARCINOMA SOX2 immunoreactivity.