511 5 Minor salivary glands

55. The only purely serous minor salivary gland is located in the lamina propria of the: A. Tongue. B. Hard palate. C. Soft palate D. Buccal mucosa. E. Attached gingiva.

A

The Salivary Gland System (Resting)

Major Salivary Glands (90%) Parotid Gland (25%) Submandibular Gland (60%) Sublingual Gland (5%) Minor Salivary Glands (5%) Labial Buccal Palatine Lingual

Minor Salivary Glands

Serous glands are located in the midtongue. Mucous glands in the palate and posterior tongue. Mixed glands in the lips, cheeks, and tongue tip.

Lingual Salivary Glands: von Ebner's Glands

Serous von Ebner's glands under the circumvallate papillae of the tongue, surrounded by skeletal muscle fibers.

Lingual Salivary Glands

Small salivary glands located in the connective tissue of the tongue. Blandin and Nuhn

Minor Salivary Glands in the Tongue

The tongue contains 3 distinct sets of minor salivary glands: Glands of von Ebner: pure serous Glands of Weber: pure mucous Glands of Blandin and Nuhn: mixed mucous and serous

Coronal Section Through Cheek

. Epidermis B. Dermis C. Hypodermis D. Buccinator muscle E. Submucosa w/ mucous salivary glands F. Lamina propria G. Lining buccal epithelium

A 46-year-old white male presents with the palatal lesion. The MOST likely diagnosis is:

. leukoplakia. B. lichen planus. C. papillary hyperplasia. D. nicotine stomatitis.

Basal-Cell Carcinoma, Cystic

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Lingual Salivary Glands (Tongue)

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Minor Salivary Glands

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Serous and Mucous Acini in the Tongue

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78. Which of the following glands is purely mucous?

A. Parotid B. Palatine C. Sublingual D. von Ebner's E. Submandibular B

Which of the following are pure serous glands? A. Sublingual glands B. Glands of Brunner C. Submandibular glands D. Glands of von Ebner E. Glands of Blandin-Nuhn

D

Mucocele (Mucous Retention Cyst)

Mucoceles, which are of minor salivary gland origin, are also referred to as mucus retention phenomenon and mucus escape reaction. Mucoceles are most often associated with mucus extravasation into the adjacent soft tissues caused by a traumatic ductal insult. >70% of mucoceles arise from minor salivary glands in the lower lip.

Buccal Salivary Glands

Mucous and Serous Salivary Glands in the submucous tissue of the cheeks.

Palatine Salivary Glands

Mucous glands are abundant in soft palate. Blue arrows- Mucous Glands White arrow- Lining Mucosa

Labial Salivary Glands

The epithelium on the oral cavity side is is non-keratinized stratified. Glands beneath this epithelium are salivary glands of predominantly mucous type.

Minor Salivary Gland Tumors

The incidence of malignant tumors is considerably higher in minor salivary glands than in the parotid gland; adenoid cystic carcinoma is the most frequent neoplasm of the minor salivary glands.

Palatine Salivary Glands: Soft Palate

The oral mucosa is lined by non-keratinized stratified squamous epithelium. There are large mucous glands in the subepithelial connective tissue with ducts that connect to the mucosal surface. The ducts are lined by cuboidal cells and as they get closer to the site of release onto the mucosa, the ducts cells stratify.

Palatine Salivary Glands: Soft Palate

The oral mucosa lining this portion of the soft palate is stratified squamous non-keratinized epithelium. There is an abundance of Mucous Glands under the surface of the epithelium. Red arrow- Mucous Glands Blue arrow- Lining Mucosa

Palatine Salivary Glands: Hard Palate

There are mucous salivary glands located laterally on the hard palate. In the midline of the hard palate the masticatory mucosa is closely attached to the periosteum of the palate bone. This confluence is called a mucoperiosteum. If you were going to give an injection in the hard palate you obviously would want to place the needle laterally instead of in the midline.

Minor Salivary Gland Secretions

Viscous Low in phosphate No bicarbonate (poorly buffered) Main ions are Na+, K+ and Cl- Main source of secretory IgA The sublingual and minor salivary glands contribute only about 10% of all saliva, but together they produce the majority of mucous and are critical for maintaining the mucin layer over the oral mucosa.

Lingual Salivary Glands: von Ebner's Glands

Von Ebner's Glands are specialized minor serous salivary glands of the tongue that drain saliva into the trough at the base of circumvallate and foliate papillae.

A patient has been aware of the painless, firm, slowly growing lesion. Differential diagnosis should include.

mucocele. (B) Wharthin's tumor (C) pleomorphic adenoma. (D) mucoepidermoid carcinoma 1. (a) and (b) only 2. (a), (b) and (d) 3. (a), (c) and (d) 4. (b) and (c) only 5. (b), (c) and (d) 6. (c) and (d) only 7. All of the above 6