Tumoren der Speicheldrüsen
Warthin-Tumor
der Parotis, von links nach rechts: oben T2 FS ax, DWI ax, T2 FS cor; unten T1 ax, T1 FS KM ax und cor. Etwas Umgebungsreaktion um den Tumor ist nicht klassisch; typischerweise klar nach aussen abgrenzt.
Parotid gland
oncocytoma: a case report. Computer tomography (CT) findings: tumour mass of the left parotid gland.
Imaging of
the sublingual and submandibular spaces. Pleomorphic adenoma of the submandibular gland. a Axial and b coronal contrast-enhanced CT images demonstrate an enhancing well-circumscribed round mass within the inferior aspect of the right submandibular gland (arrow)
Imaging of
the sublingual and submandibular spaces. Adenoid cystic carcinoma of the sublingual gland. a Axial T2-weighted and b T1-weighted MR images of the sublingual space demonstrate a lobulated high T2 signal and low T1 signal lesion enlarging and distorting the left sublingual gland (arrow). c There is diffuse enhancement on the axial post-contrast T1-weighted MR image
Salivary gland tumors are variable in location, origin, and malignant potential.
Pathology
In general, the ratio of benign to malignant tumors is proportional to the gland size; i.e. the parotid gland tends to have benign neoplasms, the submandibular gland 50:50, and the sublingual glands and accessory glands mostly malignant. Due to the size discrepancy, in absolute numbers, the parotid gland has the most tumors.
Location
- parotid gland: 70%
- minor salivary glands (including sublingual): 22% with the palate being most frequent (see: minor salivary gland tumors)
- submandibular gland: 8%
Overall ~80% of all parotid masses are benign and the majority of these are pleomorphic adenomas.
Subtypes
Benign
- epithelial
- pleomorphic adenoma: this is the most common (≈50%) tumor of the parotid
- Warthin tumor: essentially only found in the parotid, in older, usually male patients; it is bilateral in 10-15%
- intraductal papilloma of salivary glands
- oncocytoma of salivary glands
- myoepithelioma: until recently considered a subtype of pleomorphic adenoma; they can also originate in breast and bronchus
- non-epithelial
Malignant
- mucoepidermoid carcinoma: most of the malignant lesions
- adenoid cystic carcinoma
- myoepithelioma
- adenocarcinoma (not otherwise specified)
- acinic cell carcinoma of salivary glands
- squamous cell carcinoma of salivary glands
- malignant mixed tumors of the salivary glands
- carcinoma ex pleomorphic adenoma
- carcinosarcoma (true mixed tumor of the salivary glands)
- metastasizing pleomorphic adenoma
- salivary duct carcinoma
- metastases (mostly to intraparotid lymph nodes)
- cutaneous squamous cell carcinoma
- malignant melanoma
- testicular seminoma (rare)
- lymphoma (rare)
- primary: arising from the parotid gland as a MALToma
- secondary: involving the intraparotid lymph nodes
See also
Siehe auch:
- Hämangiom
- Parotistumoren
- Pleomorphes Adenom
- pleomorphes Adenom der Glandula parotis
- Warthin-Tumor
- Adenoid-zystisches Karzinom
- zystische Läsionen der Glandula parotis
- myoepithelioma
- Lipom der Speicheldrüsen
- acinic cell carcinoma of salivary glands
- minor salivary gland tumour
- Lipom der Glandula parotis
- Biopsie Glandula parotis
- Hämangiom Glandula parotis
- Speicheldrüsenmetastasen
- staging of malignant salivary gland tumours
- lymphatische Malformationen
- Vergrößerung der Glandula parotis
- maligne Tumoren der Parotis
- Onkozytom der Speicheldrüsen
- mukoepidermoides Karzinom
- Lungenkarzinome vom Speicheldrüsentyp
und weiter:
