Search Results for sarcoma

SYNOVIAL SARCOMA Figure 1-128 SYNOVIAL SARCOMA A: Spindled cells with elongated, uniform nuclei are set in a collagenous stroma in this monophasic synovial sarcoma. B: In biphasic synovial sarcoma, in addition to the spindled cells, there are tumor glands lined by cuboidal cells. C: Poorly More about this image found in SYNOVIAL SARCOMA A: Spindled cells with elongated, uniform nuclei are set ...

SYNOVIAL SARCOMA Figure 7-49 SYNOVIAL SARCOMA A: Low-magnification view of a monophasic synovial sarcoma showing sheets of plump spindle cells with areas of fascicular growth. B: At higher magnification, the plump spindle cells have ovoid nuclei, which overlap each other and have, in this case More about this image found in SYNOVIAL SARCOMA A: Low-magnification view of a monophasic synovial sarcom...

ADAMANTINOMA-LIKE EWING SARCOMA Figure 1-156 ADAMANTINOMA-LIKE EWING SARCOMA A: The tumor grows as solid nests and cords of primitive-appearing cells. B: Scattered foci of abrupt squamous differentiation are sometimes seen. C, D: In contrast to conventional Ewing sarcoma, the adamantinoma-like More about this image found in ADAMANTINOMA-LIKE EWING SARCOMA A: The tumor grows as solid nests and cord...

FIBROSARCOMA Figure 1-116 FIBROSARCOMA This is a diagnosis of exclusion for a sarcoma showing a herringbone fascicular growth pattern, cellular atypia, and no evidence of specific mesenchymal differentiation. More about this image found in FIBROSARCOMA This is a diagnosis of exclusion for a sarcoma showing a herr...

UNDIFFERENTIATED PLEOMORPHIC SARCOMA Figure 1-117 UNDIFFERENTIATED PLEOMORPHIC SARCOMA A: Cells are markedly atypical and show no specific differentiation. B: Cases with prominent myxoid changes and prominent vessels are called myxofibrosarcoma. More about this image found in UNDIFFERENTIATED PLEOMORPHIC SARCOMA A: Cells are markedly atypical and sh...

BIPHENOTYPIC SINONASAL SARCOMA Figure 1-126 BIPHENOTYPIC SINONASAL SARCOMA A: The unencapsulated tumor often entraps the downward invaginations of surface epithelium. B: Haphazardly arranged fascicles surround dilated, thin-walled vessels. C: Alternating fascicles of spindled cells More about this image found in BIPHENOTYPIC SINONASAL SARCOMA A: The unencapsulated tumor often entraps t...

BIPHENOTYPIC SINONASAL SARCOMA Figure 1-127 BIPHENOTYPIC SINONASAL SARCOMA This tumor type invariably shows positivity for both S-100 protein (A) and SMA (B), although the extent of staining is variable. More about this image found in BIPHENOTYPIC SINONASAL SARCOMA This tumor type invariably shows positivity...

EWING SARCOMA Figure 1-157 EWING SARCOMA The tumor consists of uniform cells with clear cytoplasm and round nuclei containing powdery chromatin. More about this image found in EWING SARCOMA The tumor consists of uniform cells with clear cytoplasm and...

OROPHARYNGEAL FOLLICULAR DENDRITIC CELL SARCOMA Figure 2-46 OROPHARYNGEAL FOLLICULAR DENDRITIC CELL SARCOMA Low magnification view shows vaguely nodular sheets of cells interspersed with some associated mature lymphocytes. More about this image found in OROPHARYNGEAL FOLLICULAR DENDRITIC CELL SARCOMA Low magnification view sho...

OROPHARYNGEAL FOLLICULAR DENDRITIC CELL SARCOMA Figure 2-47 OROPHARYNGEAL FOLLICULAR DENDRITIC CELL SARCOMA High magnification view shows the tumor cells in sheets with round to ovoid nuclei, small nucleoli, scattered multinucleated cells, irregular nuclear contours, and interspersed mature More about this image found in OROPHARYNGEAL FOLLICULAR DENDRITIC CELL SARCOMA High magnification view sh...

ODONTOGENIC SARCOMA (OS) Figure 5-35 ODONTOGENIC SARCOMA (OS) Poorly marginated osteolytic OS of right posterior mandible. More about this image found in ODONTOGENIC SARCOMA (OS) Poorly marginated osteolytic OS of right posterio...

ODONTOGENIC SARCOMA Figure 5-36 ODONTOGENIC SARCOMA A–C: Hypercellular embryonal mesenchymal stroma (A) with significant cytologic atypia and increased mitoses on higher magnification (B,C). More about this image found in ODONTOGENIC SARCOMA A–C: Hypercellular embryonal mesenchymal stroma (A) wi...

FOLLICULAR DENDRITIC CELL SARCOMA Figure 7-16 FOLLICULAR DENDRITIC CELL SARCOMA A,B: Groups of loosely cohesive, atypical histiocytoid cells (A) are immunohistochemically positive for CD23 (B). More about this image found in FOLLICULAR DENDRITIC CELL SARCOMA A,B: Groups of loosely cohesive, atypica...

SYNOVIAL SARCOMA Figure 7-50 SYNOVIAL SARCOMA A,B: The aspirates are cellular and show loosely cohesive groups of cells with irregular edges. Spindle cells are uniform, with plump oval nuclei and rare mitoses. (Papanicolaou stain) More about this image found in SYNOVIAL SARCOMA A,B: The aspirates are cellular and show loosely cohesive...

MESENCHYMAL CHONDROSARCOMA Figure 5-195 MESENCHYMAL CHONDROSARCOMA A: The perivascular, hemangiopericytoma-like pattern of primitive round to spindled cells of mesenchymal chondrosarcoma may mimic Ewing sarcoma. B: Strong and diffuse membrane positivity of CD99 in the small cells. More about this image found in MESENCHYMAL CHONDROSARCOMA A: The perivascular, hemangiopericytoma-like pa...

is extremely rare in the head and neck. This typical chordoma in the upper right is juxtaposed to a high-grade, spindled and pleomorphic sarcoma in the lower aspect. More about this image found in CHORDOMA A: Chondroid chordoma can have a basophilic matrix with lobulatio...