Classification of Non-Neoplastic Lesions of the Thyroid Gland See Box 27-1 . Box 27-1 Classification of Non-Neoplastic Lesions of the Thyroid Gland Developmental Heterotopia/ectopia of thyroid tissues Lingual thyroid Thyroglossal duct cyst Lateral aberrant thyroid, parasitic nodule, and mechanical implantation…
Embryology of the Thyroid ( Fig. 26-1 ) Thyroid gland is the first endocrine gland to appear during embryonic development. Thyroid gland derives from three primordium, median anlage, and lateral anlagen: Median anlage develops around the twenty-fourth day of gestation…
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Classification of Neoplasms of the Ear And Temporal Bone Box 24-1 Classification of Neoplasms of the Ear and Temporal Bone I External Ear A Benign Epithelial/neuroectodermal/mesenchymal – Keratoacanthoma – Ceruminal gland neoplasms – Seborrheic keratoses – Squamous papilloma – Melanocytic…
Classification of Non-Neoplastic Lesions of the Ear Box 23-1 Classification of Non-Neoplastic Lesions of the Ear and Temporal Bone External Ear Developmental (accessory tragi; first branchial cleft anomalies, others) Infectious and inflammatory Keloid Epidermal and sebaceous cysts Idiopathic cystic chondromalacia…
Embryology External Ear External ear develops from the first brachial groove. Auricle (pinna) develops from the auricular hillocks, a group of six mesenchymal swellings, from the first and second branchial arches lying around the first branchial groove. Mesenchymal structures of…
Intraoperative Consultation in Salivary Glands General Considerations ( Figs. 21-1 through 21-12 ) Intraoperative consultation (i.e., frozen section) in salivary gland pathology presents unique diagnostic challenges. Majority of salivary gland neoplasms (approximately 80%) originate in parotid and submandibular glands: Approximately…
Classification of Neoplasms of Salivary Glands Box 20-1 contains the classification of neoplasms of the salivary glands. Box 20-1 Classification of Neoplasms of the Salivary Glands Benign Neoplasms Epithelial Pleomorphic adenoma Basal cell adenoma Canalicular adenoma Warthin tumor Myoepithelioma Oncocytoma…
Classification of Non-Neoplastic Salivary Gland Lesions Box 19-1 Classification of Non-Neoplastic Salivary Gland Lesions Developmental Lesions Heterotopias Hyperplasia and Metaplasia Adenomatoid hyperplasia Squamous metaplasia Necrotizing sialometaplasia Oncocytic changes (oncocytic metaplasia, oncocytosis) Intercalated duct lesions (intercalated duct hyperplasia; [intercalated duct adenoma])…
Salivary gland system composed of exocrine glanular tissue that include major salivary glands and minor salivary glands: Major salivary glands include: – Parotid gland – Submandibular (submaxillary) gland – Sublingual gland Minor salivary (seromucous) glands include: – Small aggregations within…