Search Results for papilloma

ONCOCYTIC SINONASAL PAPILLOMA Figure 1-23 ONCOCYTIC SINONASAL PAPILLOMA This subtype of sinonasal papilloma shows both exophytic and inverted growth patterns. More about this image found in ONCOCYTIC SINONASAL PAPILLOMA This subtype of sinonasal papilloma shows bo...

INVERTED SINONASAL PAPILLOMA WITH DYSPLASIA Figure 1-25 INVERTED SINONASAL PAPILLOMA WITH DYSPLASIA The typical inverted papilloma epithelium (left) abruptly transitions to an area (right) with increased nuclear pleomorphism, dyskeratosis, and a loss of intraepithelial neutrophils. More about this image found in INVERTED SINONASAL PAPILLOMA WITH DYSPLASIA The typical inverted papilloma...

SQUAMOUS PAPILLOMA Figure 4-29 SQUAMOUS PAPILLOMA A: Squamous papilloma on the uvula (arrow) is composed of a cluster of finger-like projections. B: In areas of friction, the papilloma may have blunted papillary projections (arrow). More about this image found in SQUAMOUS PAPILLOMA A: Squamous papilloma on the uvula (arrow) is composed ...

SQUAMOUS PAPILLOMA Figure 4-30 SQUAMOUS PAPILLOMA A: Pedunculated, keratinized squamous papilloma. B: High power photomicrograph highlights the fibrovascular cores (arrows). C: Sessile squamous papilloma. D: Nonkeratinized squamous papilloma. More about this image found in SQUAMOUS PAPILLOMA A: Pedunculated, keratinized squamous papilloma. B: Hi...

LARYNGEAL SQUAMOUS PAPILLOMA Figure 6-23 LARYNGEAL SQUAMOUS PAPILLOMA Endoscopic view of a subglottic papilloma with a pink-white, homogeneous, and pebbly surface. More about this image found in LARYNGEAL SQUAMOUS PAPILLOMA Endoscopic view of a subglottic papilloma wit...

SQUAMOUS PAPILLOMA Figure 6-24 SQUAMOUS PAPILLOMA Low-magnification view of a typical squamous papilloma with delicate papillae, fibrovascular cores, and squamous epithelium of variable thickness with minimal to no keratinization. More about this image found in SQUAMOUS PAPILLOMA Low-magnification view of a typical squamous papilloma ...

INVERTED SINONASAL PAPILLOMA, LOW-RISK HPV POSITIVE Figure 1-22 INVERTED SINONASAL PAPILLOMA, LOW-RISK HPV POSITIVE This inverted papilloma has the typical growth pattern (A), but exhibits prominent koilocytic changes in the epithelium (B). Papillomas with this appearance typically harbor low More about this image found in INVERTED SINONASAL PAPILLOMA, LOW-RISK HPV POSITIVE This inverted papillom...

ONCOCYTIC SINONASAL PAPILLOMA Figure 1-24 ONCOCYTIC SINONASAL PAPILLOMA Compared to other subtypes, the epithelium of oncocytic papilloma is thinner, has more intraepithelial microcysts, and is composed of cells with abundant granular eosinophilic cytoplasm. More about this image found in ONCOCYTIC SINONASAL PAPILLOMA Compared to other subtypes, the epithelium o...

SQUAMOUS CELL CARCINOMA EX-INVERTED SINONASAL PAPILLOMA Figure 1-26 SQUAMOUS CELL CARCINOMA EX-INVERTED SINONASAL PAPILLOMA On the left is a typical inverted sinonasal papilloma, while on the right there is an overtly malignant keratinizing squamous cell carcinoma. More about this image found in SQUAMOUS CELL CARCINOMA EX-INVERTED SINONASAL PAPILLOMA On the left is a t...

ADENOSQUAMOUS CARCINOMA EX-INVERTED SINONASAL PAPILLOMA Figure 1-27 ADENOSQUAMOUS CARCINOMA EX-INVERTED SINONASAL PAPILLOMA A: The tumor usually has the typical low-power appearance of an inverted sinonasal papilloma, but at the deep aspect of the lesion, there are small nests involving bone. B More about this image found in ADENOSQUAMOUS CARCINOMA EX-INVERTED SINONASAL PAPILLOMA A: The tumor usual...

INVERTED SINONASAL PAPILLOMA Figure 1-17 INVERTED SINONASAL PAPILLOMA Deeply invaginating clefts create a “cerebriform” gross and clinical appearance. More about this image found in INVERTED SINONASAL PAPILLOMA Deeply invaginating clefts create a “cerebrif...

EXOPHYTIC SINONASAL PAPILLOMA Figure 1-18 EXOPHYTIC SINONASAL PAPILLOMA Outwardly growing papillary fronds with a thin central core of fibrovascular tissue are lined by thickened nonkeratinizing squamous epithelium. More about this image found in EXOPHYTIC SINONASAL PAPILLOMA Outwardly growing papillary fronds with a th...

EXOPHYTIC SINONASAL PAPILLOMA Figure 1-19 EXOPHYTIC SINONASAL PAPILLOMA A: Koilocytic changes, i.e., nuclear enlargement, hyperchromasia, multinucleation, and perinuclear “halos,” are often observed in the superficial epithelial layers. B: Keratinization is not usually present, but can be seen More about this image found in EXOPHYTIC SINONASAL PAPILLOMA A: Koilocytic changes, i.e., nuclear enlarge...

INVERTED SINONASAL PAPILLOMA Figure 1-20 INVERTED SINONASAL PAPILLOMA A–D: There is an endophytic growth pattern, with rounded downward invaginations of the thickened surface epithelium into the underlying stroma. More about this image found in INVERTED SINONASAL PAPILLOMA A–D: There is an endophytic growth pattern, w...

INVERTED SINONASAL PAPILLOMA Figure 1-21 INVERTED SINONASAL PAPILLOMA A: The tumor epithelium is most often a thickened transitional-type epithelium, often with a superficial ciliated layer of respiratory epithelium. B: The epithelium is usually accompanied by numerous transmigrating More about this image found in INVERTED SINONASAL PAPILLOMA A: The tumor epithelium is most often a thick...

INTRADUCTAL PAPILLOMA Figure 4-60 INTRADUCTAL PAPILLOMA A: Unicystic lesions composed of numerous branching papillary structures with fibrovascular cores. B: Papillae are lined by columnar epithelium with goblet cells. More about this image found in INTRADUCTAL PAPILLOMA A: Unicystic lesions composed of numerous branching ...

INTRADUCTAL PAPILLOMA Figure 4-61 INTRADUCTAL PAPILLOMA A: A well-delineated, endophytic proliferation forms bulbous papillary projections. B: The predominant basaloid and squamous/epidermoid cell component contains scattered mucocytes (black arrows); luminal surface cuboidal/columnar cells More about this image found in INTRADUCTAL PAPILLOMA A: A well-delineated, endophytic proliferation forms...

SQUAMOUS PAPILLOMA Figure 6-25 SQUAMOUS PAPILLOMA The epithelium shows the mild maturational abnormalities. Cells have mildly pleomorphic nuclei, scattered binucleation, and koilocytic change with cytoplasmic clearing. More about this image found in SQUAMOUS PAPILLOMA The epithelium shows the mild maturational abnormalitie...

SQUAMOUS PAPILLOMA Figure 6-26 SQUAMOUS PAPILLOMA Mild maturational abnormalities of cells include mildly pleomorphic nuclei, scattered binucleation, and minimal parakeratosis on the surface. More about this image found in SQUAMOUS PAPILLOMA Mild maturational abnormalities of cells include mildly...

SQUAMOUS PAPILLOMA Figure 6-27 SQUAMOUS PAPILLOMA Dysplastic features include epithelium showing hyperkeratosis and hyperchromatic basal cells with angulation and increased mitotic activity. More about this image found in SQUAMOUS PAPILLOMA Dysplastic features include epithelium showing hyperker...