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Thursday, July 16 2015 @ 05:31 AM UTC

Head and Neck
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Non bacterial granulomatous inflammation of the thyroid gland with multinucleated giant cells, usually painful, usually in women. Histology shows numerous non-necrotizing granulomas with multinuclated giant cells eating the colloid, stromal fibrosis and acute inflammation with microabscesses.
Granulomatous Thyroiditis of De Quervain (De Quervain's Thyroiditis, Subacute Thyroiditis)
Wednesday, May 18 2011 @ 07:16 PM UTC
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Papillary Thyroid Carcinoma, spindle cell variant
Thursday, October 21 2010 @ 02:23 PM UTC
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Views 6047
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Medullary carcinoma, oncocytic variant
Thursday, October 21 2010 @ 02:24 PM UTC
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Views 6265
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Rating: 4.00/5 (1 vote cast)
Insular Carcinoma of the Thyroid
Thursday, October 21 2010 @ 02:24 PM UTC
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Views 8180
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Rating: 3.00/5 (1 vote cast)
Dyshormonogenetic goiter
Thursday, October 21 2010 @ 02:25 PM UTC
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Views 7731
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Sinonasal Adenocarcinoma, mucinous type
Thursday, October 14 2010 @ 05:06 PM UTC
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Juvenile nasopharyngeal angiofibroma (JNA) is a histologically benign yet locally aggressive vascular head and neck tumor. JNA affects almost exclusively adolescent boys, but has been reported in women and elderly patients on rare occasions. JNA is an uncommon tumor, with reported incidence between 1 in 5000 and 1 in 60,000 otolaryngology patients. It is estimated to account for only 0.5% of all head and neck neoplasms, but is nevertheless considered the most common benign neoplasm of the nasopharynx. Grossly, the JNA is a lobulated, firm, non-encapsulated mass, usually pink-gray or purple-red. The tumor base may be sessile or pedunculated, but the tumor often has numerous secondary attachments, complicating resection in continuity. Microscopically, the tumor is composed of thin-walled vessels of varying caliber in a mature connective tissue stroma. The vessels typically have a single endothelial cell lining without a muscularis layer, which probably explains the tumor's propensity for hemorrhage. Hystology: many blood vessels in fibrous stroma. DDX: Lobular capillary hemangioma (pyogenic granuloma)
Juvenile Nasopharyngeal Angiofibroma
Tuesday, December 01 2009 @ 06:25 PM UTC
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Encapsulated or well-circumscribed neoplasm; Basal cell type proliferation with tubular growth with cuboidal to columnar cells with uniform hyperchromatic nuclei. Vascular stroma set distinctly against tubules. PAS positive diastase-sensitive granules. Differential Diagnosis: pleomorphic adenoma; ameloblastoma; Cutaneous basal cell carcinoma; Adenoid cystic carcinoma.
Canalicular Adenoma
Thursday, April 30 2009 @ 05:22 PM UTC
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* Trabecular arrangement * Dense fibrous bands (not shown above) * Spindled cells * Increased mitotic counts * Capsular invasion Immunohistochemistry: Ki-67 is high in carcinoma Cyclin D1 positive in carcinoma (>90%) but not in adenoma(
Parathyroid Carcinoma
Saturday, August 02 2008 @ 10:02 PM UTC
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Medullary carcinoma of the thyroid (MTC) is a distinct thyroid carcinoma that originates in the parafollicular C cells of the thyroid gland. These C cells produce calcitonin. MTC has a genetic association with multiple endocrine neoplasia (MEN) type 2A a
Medullary Carcinoma
Saturday, August 02 2008 @ 10:02 PM UTC
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Tumors are poorly defined, fleshy masses with areas of necrosis and hemorrhage. Microscopically they are composed of anaplastic cells with marked cytologic atypia and high mitotic activity. Tumor necrosis and vascular invasion are common. Histologic patte
Anaplastic Thyroid Carcinoma
Saturday, August 02 2008 @ 10:02 PM UTC
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Follicular Carcinoma, Insular Variant
Saturday, August 02 2008 @ 10:02 PM UTC
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Views 7866
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