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Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 21
Published: 01 December 2024
10.55418/9781933477473-04
ISBN-10: 1-933477-47-4
ISBN: 978-1-933477-47-3
... distribution (lentigines) Myxomas Heart Myxomas Adrenal gland PPNAD with Cushing syndrome Pituitary gland Pituitary GH-secreting neuroendocrine tumor with acromegaly Breast Myxomatosis Ductal adenoma Testis Large cell calcifying Sertoli cell tumor Thyroid gland Follicular nodular...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 21
Published: 01 December 2024
10.55418/9781933477473-09
ISBN-10: 1-933477-47-4
ISBN: 978-1-933477-47-3
... or neuroendocrine tumors are a consideration. These include follicular, papillary, and medullary thyroid carcinoma and gastroenteropancreatic or bronchopulmonary neuroendocrine tumors ( 135 ). Medullary thyroid carcinoma is the most common misdiagnosis of paraganglioma among thyroid tumors ( 136 ). Although subtle...
Images
Published: 01 September 2024
MALASSEZIA FOLLICULITIS Figure 24-47 MALASSEZIA FOLLICULITIS Numerous small follicular pustules with surrounding erythema on the posterior neck and upper back. (Courtesy of Dr. P. Moodley, Sandton, South Africa) More about this image found in MALASSEZIA FOLLICULITIS Numerous small follicular pustule...
Images
Published: 01 September 2024
KERION Figure 24-38 KERION PAS stain shows hair shaft invasion by fungal arthrospores and mildly distended follicular ostium containing scattered surrounding neutrophils. More about this image found in KERION PAS stain shows hair shaft invasion by fungal arthrospores and mild...
Images
Published: 01 September 2024
PERSISTENT GENERALIZED LYMPHADENOPATHY (PGL) Figure 9-2 PERSISTENT GENERALIZED LYMPHADENOPATHY (PGL) A: The lymph node has irregularly shaped reactive follicles. B: PGL lymph node follicle in center with macrophage phagocytosis and apoptotic debris. C: HIVp24 stains HIV virus in follicular dend... More about this image found in PERSISTENT GENERALIZED LYMPHADENOPATHY (PGL) A: The lymph node has irregul...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 20
Published: 01 September 2024
10.55418/9781933477435-24
ISBN-10: 1-933477-43-1
ISBN: 978-1-933477-43-5
... represents the most severe form of tinea capitis and is characterized by discharging follicular pustules and the formation of a painful inflammatory mass, in which loose hairs are present. Regional lymphadenopathy is common ( 67 , 69 ). Majocchi granuloma (nodular granulomatous perifolliculitis...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 20
Published: 01 September 2024
10.55418/9781933477435-09
ISBN-10: 1-933477-43-1
ISBN: 978-1-933477-43-5
... in HIV infection: salivary glands, tonsils, liver portal tracts, and lung lymphoid tissue are examples. The primary lymphoid pathology in HIV proceeds from hyperplasia to involution to atrophy. Most patients, in early infection, develop follicular hyperplasia in lymph nodes and spleen, the basis...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 20
Published: 01 September 2024
10.55418/9781933477435-25
ISBN-10: 1-933477-43-1
ISBN: 978-1-933477-43-5
... in lymph node and ocular tissue ( 7 ). Lymph nodes are frequently enlarged and reveal the characteristic combination of follicular hyperplasia, clusters of epithelioid histiocytes which impinge on the germinal centers, and sinusoidal distention by monocytoid B cells ( 8 , 9 ). Cysts are sometimes observed...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 20
Published: 01 September 2024
10.55418/9781933477435-18
ISBN-10: 1-933477-43-1
ISBN: 978-1-933477-43-5
... prominent follicular hyperplasia, with or without small granulomas, a thickened capsule, typical vascular changes, and striking plasmacytosis ( fig. 18-7 ). SECONDARY SYPHILIS OF SKIN Figure 18-6 SECONDARY SYPHILIS OF SKIN Lichenoid inflammation with prominent plasma cells. SECONDARY SYPHILIS INVOLVING...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 20
Published: 01 September 2024
10.55418/9781933477435-17
ISBN-10: 1-933477-43-1
ISBN: 978-1-933477-43-5
... lymph nodes in cat scratch disease depends on the stage of infection. Follicular hyperplasia, irregular microabscesses, and foci of cortical necrosis are followed by coalescent stellate granulomas with a necrotic center, palisaded histiocytes, and usually, only rare multinucleated giant cells ( 5...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 20
Published: 01 September 2024
10.55418/9781933477435-04
ISBN-10: 1-933477-43-1
ISBN: 978-1-933477-43-5
... (sometimes follicular), often associated with necrosis and hemorrhage. Cellular viral inclusions are frequently (but not invariably) present. In AdV pneumonitis, lung macroscopy typically reveals congestion with focal areas of consolidation ( fig. 4-12 ). The bronchi may have a mucinous or bloody exudate...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 20
Published: 01 September 2024
10.55418/9781933477435-08
ISBN-10: 1-933477-43-1
ISBN: 978-1-933477-43-5
... disease characterized by aberrant follicular hyperplasia and plasma cell infiltration of lymph nodes ( 30 ). The nodal architecture is usually preserved although germinal centers show prominent and sometimes hyalinized arterioli. There is associated fibrin and immunoglobulin deposition in the somewhat...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 20
Published: 01 September 2024
10.55418/9781933477435-15
ISBN-10: 1-933477-43-1
ISBN: 978-1-933477-43-5
..., and nipples show prominent cutaneous lymphoid follicles (lymphoid hyperplasia or “pseudolymphoma”) which contain spirochetes; these are referred to as Borrelia lymphocytoma cutis ( 16 ). These lesions require differentiation from cutaneous lymphoma, particularly follicular lymphoma...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 20
Published: 01 September 2024
10.55418/9781933477435-13
ISBN-10: 1-933477-43-1
ISBN: 978-1-933477-43-5
... aggregates, and the occasional presence of mild chronicity may mimic Crohn disease histologically. Lymph node involvement usually shows follicular hyperplasia, with or without associated granulomas and neutrophilic microabscesses ( fig. 13-13 ). YERSINIA APPENDICITIS Figure 13-12 YERSINIA...
Images
Published: 01 February 2024
SCALP NEVUS Figure 5-8 SCALP NEVUS A: There is a broad junctional nevus. B: Nests at the dermoepidermal junction vary in size and shape and are admixed with solitary units of melanocytes, which display a lentiginous pattern and extend into follicular infundibular epithelium. More about this image found in SCALP NEVUS A: There is a broad junctional nevus. B: Nests at the dermoep...
Images
Published: 01 February 2024
LENTIGO MALIGNA MELANOMA IN SITU WITH JUNCTIONAL NESTS Figure 13-6 LENTIGO MALIGNA MELANOMA IN SITU WITH JUNCTIONAL NESTS Irregularly placed nests of varying size and shape are present at the dermoepidermal junction along with solitary units. The latter extend into follicular structures. There is... More about this image found in LENTIGO MALIGNA MELANOMA IN SITU WITH JUNCTIONAL NESTS Irregularly placed ...
Images
Published: 01 February 2024
SCALP NEVUS Figure 5-10 SCALP NEVUS A: The compound nevus is associated with ectatic hair follicles and follicular cyst-like structures. The intradermal melanocytes are densely cellular and separated by the elongated rete ridges. B: The melanocytes are arranged in nests and solitary units. They ... More about this image found in SCALP NEVUS A: The compound nevus is associated with ectatic hair follicle...
Images
Published: 01 February 2024
COMMON BLUE NEVUS Figure 8-4 COMMON BLUE NEVUS A: Variably dense aggregates of pigmented melanocytes are distributed around follicular units occupying a larger area in the reticular dermis. B: There are slender fusiform melanocytes with finely granular cytoplasmic melanin pigment and small oval ... More about this image found in COMMON BLUE NEVUS A: Variably dense aggregates of pigmented melanocytes ar...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 19
Published: 01 February 2024
10.55418/9781933477428-21
ISBN-10: 1-933477-42-3
ISBN: 978-1-933477-42-8
... and subsequent soft tissue metastasis. FOLLICULAR MELANOMA Follicular or folliculotropic melanoma is a melanoma variant in which the in situ component is predominantly located within a follicular structure ( fig. 21-4 ) ( 3 ). Melanoma in situ exclusively confined to a follicle is exceedingly...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 19
Published: 01 February 2024
10.55418/9781933477428-13
ISBN-10: 1-933477-42-3
ISBN: 978-1-933477-42-8
... diagnosing LM. Dermoscopic features of LM include asymmetrically pigmented or gray-colored follicular openings, perifollicular dots and granules giving rise to an annular pattern, and angulated pigmented lines that join to create zigzag lines or polygonal structures such as rhomboids ( 11 ). MICROSCOPIC...
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