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lymphoid

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DESMOID FIBROMATOSIS  <span class="search-highlight">Lymphoid</span> aggregates are seen at the periphery of the ...
Published: 01 January 2024
DESMOID FIBROMATOSIS Figure 11-11 DESMOID FIBROMATOSIS Lymphoid aggregates are seen at the periphery of the lesion, which is a helpful clue when present in the core needle biopsy sample of a bland spindle cell proliferation. More about this image found in DESMOID FIBROMATOSIS Lymphoid aggregates are seen at the periphery of the ...
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EXTRANODAL MARGINAL ZONE LYMPHOMA OF MUCOSA-ASSOCIATED <span class="search-highlight">LYMPHOID</span> TISSUE (MAL...
Published: 01 January 2024
EXTRANODAL MARGINAL ZONE LYMPHOMA OF MUCOSA-ASSOCIATED LYMPHOID TISSUE (MALT LYMPHOMA) Figure 12-4 EXTRANODAL MARGINAL ZONE LYMPHOMA OF MUCOSA-ASSOCIATED LYMPHOID TISSUE (MALT LYMPHOMA) Low- (A), intermediate- (B), and high- (C) power images of MALT lymphoma arising in the breast. More about this image found in EXTRANODAL MARGINAL ZONE LYMPHOMA OF MUCOSA-ASSOCIATED LYMPHOID TISSUE (MAL...
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LOW-GRADE ADENOSQUAMOUS CARCINOMA  A: At low power, subtle cords, glands, a...
Published: 01 January 2024
LOW-GRADE ADENOSQUAMOUS CARCINOMA Figure 8-59 LOW-GRADE ADENOSQUAMOUS CARCINOMA A: At low power, subtle cords, glands, and nests of epithelial cells are seen haphazardly placed in the stroma. Scattered lymphoid aggregates are present. B,C: Some nests have a squamoid appearance (B) and others are... More about this image found in LOW-GRADE ADENOSQUAMOUS CARCINOMA A: At low power, subtle cords, glands, a...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 19
Published: 01 February 2024
10.55418/9781933477428-22
ISBN-10: 1-933477-42-3
ISBN: 978-1-933477-42-8
... nonmelanocytic neoplasms. Depending on the diagnostic problem (e.g., metastatic melanoma versus poorly differentiated carcinoma, lymphoma, or sarcoma) a set of antibodies to melanocytic differentiation antigens, as well as epithelial, lymphoid, and mesenchymal markers, may be necessary for a precise diagnosis...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 19
Published: 01 February 2024
10.55418/9781933477428-16
ISBN-10: 1-933477-42-3
ISBN: 978-1-933477-42-8
..., it usually does not pose a diagnostic challenge. However, if the desmoplastic component is prominent, extends deep, or is associated with lymphoid aggregates, it may lead to confusion with DM. Although a rare DM may arise in association with a melanocytic nevus, as a general rule, if a dermal sclerosing...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 18
Published: 01 January 2024
10.55418/9781933477367-12
ISBN-10: 1-933477-36-9
ISBN: 978-1-933477-36-7
... marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) are also reported ( 7 ). In recent years, the occurrence of implant-associated anaplastic large cell lymphoma has introduced a new entity to this class of lesions (see next section). As with lymphomas presenting in other non-lymph...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 18
Published: 01 January 2024
10.55418/9781933477367-11
ISBN-10: 1-933477-36-9
ISBN: 978-1-933477-36-7
... to moderate cellularity. The spindle cells have relatively small nuclei and eosinophilic cytoplasm that is sometimes described as fibrillary. Mitoses are typically scant. Lymphoid aggregates are commonly seen at the periphery of the lesion and are a helpful clue to the diagnosis ( fig. 11-11 ). Collagen...
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LYMPHANGIOMA  The walls of lymphangioma are of variable thickness and conta...
Published: 15 November 2023
LYMPHANGIOMA Figure 33-20 LYMPHANGIOMA The walls of lymphangioma are of variable thickness and contain prominent lymphoid tissue and smooth muscle bundles (arrows). More about this image found in LYMPHANGIOMA The walls of lymphangioma are of variable thickness and conta...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 18
Published: 01 January 2024
10.55418/9781933477367-02
ISBN-10: 1-933477-36-9
ISBN: 978-1-933477-36-7
..., and periductal (B-cell predominant) lymphoid infiltrates, as well as alterations of the collagenous stroma, keloidal-type collagen, and epithelioid myofibroblasts ( fig. 2-3 ) ( 6 ). The findings are subtle, but taken together, this constellation of features is sufficient to suggest the diagnosis. Correlation...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 18
Published: 01 January 2024
10.55418/9781933477367-08
ISBN-10: 1-933477-36-9
ISBN: 978-1-933477-36-7
... aggregates around the periphery of the tumor. LOW-GRADE ADENOSQUAMOUS CARCINOMA Figure 8-59 LOW-GRADE ADENOSQUAMOUS CARCINOMA A: At low power, subtle cords, glands, and nests of epithelial cells are seen haphazardly placed in the stroma. Scattered lymphoid aggregates are present. B,C: Some nests have...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 17
Published: 15 November 2023
10.55418/9781933477299-ch57
ISBN-10: 1-933477-29-6
ISBN: 978-1-933477-29-9
...-associated DLBCL consists of loose aggregates of large lymphoid cells within a fibrin matrix ( fig. 57-10 ). These cells do not infiltrate into normal tissues. The cells have an atypical immunoblastic character, with coarse chromatin and prominent nucleoli. Mitotic figures are often seen. Treatment...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 17
Published: 15 November 2023
10.55418/9781933477299-ch44
ISBN-10: 1-933477-29-6
ISBN: 978-1-933477-29-9
... are referred to as hygromas and those composed of smaller microscopic cysts as cavernous lymphangiomas. The cysts are irregular, and lined by flattened lymphatic endothelial cells. The septa typically are thick, and contain disorganized muscle bundles. Lymphoid aggregates are common...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 17
Published: 15 November 2023
10.55418/9781933477299-ch50
ISBN-10: 1-933477-29-6
ISBN: 978-1-933477-29-9
.... There is variable lymphoplasmacytic inflammation, but lymphoid aggregates or germinal centers are rare. Calcification is frequent, particular in children. Immunohistochemical Findings. All reported cases with immunohistochemical findings have been smooth muscle actin positive ( fig. 50-5 ). Only one reported case...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 17
Published: 15 November 2023
10.55418/9781933477299-ch16
ISBN-10: 1-933477-29-6
ISBN: 978-1-933477-29-9
... plakoglobin ACTN2 Alpha-actinin-2 TNNT2 Troponin T, cardiac type LMNA Lamin A BAG3 BCL2-associated athanogene 3 Table 16-2 CAUSES OF EOSINOPHILIA Primary a  Myeloid and/or lymphoid neoplasms with eosinophilia and rearrangement...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 17
Published: 15 November 2023
10.55418/9781933477299-ch33
ISBN-10: 1-933477-29-6
ISBN: 978-1-933477-29-9
...: There is often flocculent lymph fluid in the spaces, and perivascular chronic inflammation. LYMPHANGIOMA Figure 33-20 LYMPHANGIOMA The walls of lymphangioma are of variable thickness and contain prominent lymphoid tissue and smooth muscle bundles (arrows). CYSTIC HYGROMA Figure 33-17 CYSTIC HYGROMA A fetal...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 17
Published: 15 November 2023
10.55418/9781933477299-ch06
ISBN-10: 1-933477-29-6
ISBN: 978-1-933477-29-9
..., it usually is nonobstructive (black arrowhead). Within the small vasculature (e.g., vasa vasorum), however, the amyloid deposition may be marked and obstructive (black arrow). (Sulfated Alcian blue stain.) REFERENCES REFERENCES 1. Kawasaki   T . [ Acute febrile mucocutaneous syndrome with lymphoid...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 17
Published: 15 November 2023
10.55418/9781933477299-ch30
ISBN-10: 1-933477-29-6
ISBN: 978-1-933477-29-9
... aneurysm; there are histologic differences, however. Inflammatory aneurysms have numerous adventitial IgG4-positive plasma cells, lymphoid follicles, perineural fibrosis, obliterative phlebitis, and significantly higher serum IgG4 levels than the more common atherosclerotic abdominal aortic aneurysms...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 16
Published: 01 August 2023
10.55418/9781933477282-13
ISBN-10: 1-933477-28-8
ISBN: 978-1-933477-28-2
... bands containing lymphocytes. The lymphocytes can form lymphoid follicles, but are primarily T lymphocytes (see fig. 13-8 ). At medium to high power, the tumor is composed of dyscohesive cells with a uniform appearance. Other growth patterns have been described, such as cords, trabeculae, solid tubules...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 16
Published: 01 August 2023
10.55418/9781933477282-15
ISBN-10: 1-933477-28-8
ISBN: 978-1-933477-28-2
..., carcinoma with lymphoid stroma (often Epstein-Barr virus [EBV] positive), choriocarcinoma, parietal cell carcinoma, malignant rhabdoid tumor, mucoepidermoid carcinoma, Paneth cell carcinoma, undifferentiated carcinoma, mixed adenoneuroendocrine carcinoma, endodermal sinus tumor, embryonal carcinoma, pure...
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LYMPHOEPITHELIAL CYST  Left: There is nonkeratinizing squamous epithelium o...
Published: 01 March 2023
LYMPHOEPITHELIAL CYST Figure 15-53 LYMPHOEPITHELIAL CYST Left: There is nonkeratinizing squamous epithelium overlying a dense band of lymphoid tissue. Right: Small squamous islands are within the lymphoid tissue. More about this image found in LYMPHOEPITHELIAL CYST Left: There is nonkeratinizing squamous epithelium o...