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SOLID CELL NEST  Solid cell nest in a thyroglossal <span class="search-highlight">duct</span> cyst. These ultimob...
Published: 01 November 2022
SOLID CELL NEST Figure 3-5 SOLID CELL NEST Solid cell nest in a thyroglossal duct cyst. These ultimobranchial body rests are made up of polygonal to oval cells with oval nuclei and granular chromatin. More
Images
ECTOPIC THYROID TISSUE  Left: Ectopic thyroid tissue in a thyroglossal <span class="search-highlight">duct</span>...
Published: 01 November 2022
ECTOPIC THYROID TISSUE Figure 3-8 ECTOPIC THYROID TISSUE Left: Ectopic thyroid tissue in a thyroglossal duct remnant shows colloid follicles with cuboidal epithelium. Right: This tissue may be mistaken for metastatic thyroid carcinoma; however, the cytologic features are benign. More
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THYROGLOSSAL <span class="search-highlight">DUCT</span> CYST  Contrast-enhanced sagittal (left) and axial (right)...
Published: 01 November 2022
THYROGLOSSAL DUCT CYST Figure 3-9 THYROGLOSSAL DUCT CYST Contrast-enhanced sagittal (left) and axial (right) computerized tomography (CT) scans show a fluid-density structure in the soft tissues of the anterior neck (arrowheads). The cyst is intimately associated with the hyoid bone (arrow) as is... More
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THYROGLOSSAL <span class="search-highlight">DUCT</span> CYST  Left: Histologic section shows the cyst lined by ep...
Published: 01 November 2022
THYROGLOSSAL DUCT CYST Figure 3-10 THYROGLOSSAL DUCT CYST Left: Histologic section shows the cyst lined by epithelium, with lymphocytic inflammation in the cyst wall. Right: Ciliated respiratory epithelium lining a thyroglossal duct cyst. More
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 13
Published: 01 November 2022
DOI: 10.55418/9781933477251-3
ISBN-10: 1-933477-25-3
ISBN: 978-1-933477-25-1
... in the ventral midline of the primitive pharynx that later gives rise to the foramen cecum at the junction of the anterior two thirds and posterior one third of the tongue ( 2 ). The anlage then migrates caudally along the thyroglossal duct and passes through or in front of the hyoid bone before reaching its...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 13
Published: 01 November 2022
DOI: 10.55418/9781933477251-5
ISBN-10: 1-933477-25-3
ISBN: 978-1-933477-25-1
... in adults ( 1 , 83 ). They are located predominantly in the islets of Langerhans, but single neuroendocrine cells and small clusters may also be associated with the pancreatic ducts and paraductal acinar cells ( 1 ). Islets are present throughout the pancreas, but random variation in the number of islets...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 13
Published: 01 November 2022
DOI: 10.55418/9781933477251-1
ISBN-10: 1-933477-25-3
ISBN: 978-1-933477-25-1
... around the eighth week of gestation, forming the craniopharyngeal duct ( 431 ). During this time, the Rathke cleft is formed in the region of the pars intermedia. Failure of this cleft to regress during further development can lead to cystic dilatation and the formation of a Rathke cleft cyst ( 430 , 432...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 13
Published: 01 November 2022
DOI: 10.55418/9781933477251-4
ISBN-10: 1-933477-25-3
ISBN: 978-1-933477-25-1
... into paracrural, para-aortic, and paracaval lymph nodes. On the left, adrenal lymphatics initially drain into para-aortic and left renal hilar lymph nodes. Adrenal lymphatics may also drain directly into the thoracic duct and posterior mediastinal nodes ( 27 , 32 ). Abnormalities of the adrenal lymphatic vessels...
Images
EPIDIDYMIS  Left: The epididymal head consists largely of the efferent <span class="search-highlight">duct</span>...
Published: 01 August 2022
EPIDIDYMIS Figure 2-22 EPIDIDYMIS Left: The epididymal head consists largely of the efferent ductules, which show the characteristic undulating luminal surfaces. Right: The epididymal body and tail are composed of the highly convoluted epididymal duct, which is seen as multiple cross sections of... More
Images
DUCTAL ADENOCARCINOMA OF PROSTATE METASTATIC TO TESTIS  This prostatic <span class="search-highlight">duct</span>...
Published: 01 August 2022
DUCTAL ADENOCARCINOMA OF PROSTATE METASTATIC TO TESTIS Figure 10-5 DUCTAL ADENOCARCINOMA OF PROSTATE METASTATIC TO TESTIS This prostatic ductal adenocarcinoma grows extensively in dilated channels of the rete testis and raised concern for a primary carcinoma of the rete. More
Images
SPERM GRANULOMA  A: Within the epididymis, there is a large ruptured <span class="search-highlight">duct</span> w...
Published: 01 August 2022
SPERM GRANULOMA Figure 11-84 SPERM GRANULOMA A: Within the epididymis, there is a large ruptured duct with inspissated aggregates of basophilic, degenerated spermatozoa surrounded by a myofibroblastic reaction. B: At high magnification, there are congealed sperm with an associated histiocytic an... More
Images
TESTICULAR <span class="search-highlight">DUCTS</span>: PAX8 EXPRESSION  Left: Nuclear reactivity is seen in the ...
Published: 01 August 2022
TESTICULAR DUCTS: PAX8 EXPRESSION Figure 2-56 TESTICULAR DUCTS: PAX8 EXPRESSION Left: Nuclear reactivity is seen in the rete testis but not in the seminiferous tubules (bottom). Right: The epithelium of the vas deferens shows expression. More
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TESTICULAR EMBRYONIC REMNANTS  A diagram of the adult testis shows the loca...
Published: 01 August 2022
TESTICULAR EMBRYONIC REMNANTS Figure 2-10 TESTICULAR EMBRYONIC REMNANTS A diagram of the adult testis shows the location of remnants derived from mesonephric tubules (paradidymis, superior and inferior ductuli aberrantes [or vasa aberrantes]), the mesonephric duct (the appendix epididymis), and t... More
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EMBRYOLOGY OF TESTIS  Those mesonephric tubules (left) that persist are kno...
Published: 01 August 2022
EMBRYOLOGY OF TESTIS Figure 2-9 EMBRYOLOGY OF TESTIS Those mesonephric tubules (left) that persist are known as the epigenital tubules. They connect with the tubules of the rete testis and become the efferent ductules of the epididymis (right), comprising the head of the epididymis. The remaining... More
Images
PREPUBERTAL-TYPE TERATOMA  Organoid pancreatic differentiation consists of ...
Published: 01 August 2022
PREPUBERTAL-TYPE TERATOMA Figure 5-15 PREPUBERTAL-TYPE TERATOMA Organoid pancreatic differentiation consists of ducts, acinar tissue, and islets of Langerhans. More
Images
PARATESTICULAR SMOOTH MUSCLE HYPERPLASIA  A nodular proliferation of smooth...
Published: 01 August 2022
PARATESTICULAR SMOOTH MUSCLE HYPERPLASIA Figure 11-41 PARATESTICULAR SMOOTH MUSCLE HYPERPLASIA A nodular proliferation of smooth muscle is unassociated with a duct and resembles a leiomyoma. More
Images
TERATOMA, POSTPUBERTAL TYPE  Liver-like differentiation with macrovesicular...
Published: 01 August 2022
TERATOMA, POSTPUBERTAL TYPE Figure 4-171 TERATOMA, POSTPUBERTAL TYPE Liver-like differentiation with macrovesicular fatty change is seen in this tumor. A small bile duct is present (upper right). More
Images
TESTICULAR ANATOMY  The seminiferous tubules form continuous loops that dra...
Published: 01 August 2022
TESTICULAR ANATOMY Figure 2-15 TESTICULAR ANATOMY The seminiferous tubules form continuous loops that drain into the rete testis via the straight tubules. The efferent ductules coil to form the epididymal head; and the convoluted epididymal duct comprises its body and tail. (From https://www.ear... More
Images
EPIDIDYMITIS NODOSA  Left: Epididymitis nodosa is the analogous lesion to v...
Published: 01 August 2022
EPIDIDYMITIS NODOSA Figure 11-99 EPIDIDYMITIS NODOSA Left: Epididymitis nodosa is the analogous lesion to vasitis nodosa in the epididymis. In this case, a cluster of small tubules (top) is juxtaposed to normal but dilated ducts (bottom). Right: At higher magnification, there are crowded small t... More
Images
HYALINE GLOBULES IN EPIDIDYMAL EPITHELIUM  Left: The epididymal epithelium ...
Published: 01 August 2022
HYALINE GLOBULES IN EPIDIDYMAL EPITHELIUM Figure 11-16 HYALINE GLOBULES IN EPIDIDYMAL EPITHELIUM Left: The epididymal epithelium contains hyaline globules, variably referred to as Paneth cell-like metaplasia or coarse granular cytoplasmic change. Right: At higher magnification, a normal-appearin... More