eMedicine Specialties > Ophthalmology > Lacrimal System
Lacrimal Gland Tumors: Differential Diagnoses & Workup
Updated: Aug 8, 2006
- Overview
- Differential Diagnoses & Workup
- Treatment & Medication
- Follow-up
Differential Diagnoses
Dry Eye Syndrome
Exophthalmos
Ptosis, Adult
Workup
Imaging Studies
- Neuroimaging studies can be of great assistance in making the correct diagnosis.
- Computed tomography (CT) scan of benign epithelial lesions, such as pleomorphic adenomas, reveals a well-circumscribed, pseudoencapsulated lesion in the superotemporal fossa.
- Characteristic bony changes include expansion and remodeling in the lacrimal fossa without evidence of bony invasion or erosion.
- In contrast, malignant epithelial lesions, such as adenoid cystic carcinoma, usually present as an irregular mass, producing bony erosion (70%) and occasional calcification (20%).
- Lymphoproliferative lesions usually are eccentric in shape with significant contrast enhancement.
Other Tests
- Immunohistochemistry may be helpful in distinguishing between inflammatory, benign, and malignant lymphoproliferative lesions. Immunohistochemistry is a laboratory modality that uses special markers to demonstrate the presence of specific antigens in target tissues.
- Benign inflammatory lesions (pseudotumor) have a polyclonal morphology, whereas the lymphoid lesions tend to be monoclonal.
Histologic Findings
Histologic examination of pleomorphic adenomas reveals evidence of both epithelial and mesenchymal differentiation. Proliferation of benign epithelial cells usually is arranged in a double layer to form lumens. Stromal differentiation can be seen in the formation of bone and cartilage.
Adenoid cystic carcinomas are derived from duct cells, and they form spaces into which basement membranelike material is deposited. This confers a cribriform or "Swiss cheese" appearance to the tissue, although growth in tubules and nests also are recognized. Five histologic patterns have been observed in these lesions, as follows: (1) cribriform (the most common subtype), (2) sclerosing, (3) basaloid, (4) comedo, and (5) ductal. The basaloid type has the worst prognosis.
More on Lacrimal Gland Tumors |
| Overview: Lacrimal Gland Tumors |
Differential Diagnoses & Workup: Lacrimal Gland Tumors |
| Treatment & Medication: Lacrimal Gland Tumors |
| Follow-up: Lacrimal Gland Tumors |
| References |
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References
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Farmer JP, Lamba M, Lamba WR, et al. Lymphoproliferative lesions of the lacrimal gland: clinicopathological, immunohistochemical, and molecular genetic analysis. Can J Ophthalmol. 2005;40:151-60. [Medline].
Font RL, Smith SL, Bryan RG. Malignant epithelial tumors of the lacrimal gland: A clinicopathological study of 21 cases. Arch Ophthalmol. 1998;116:613-6. [Medline].
Forrest AW. Pathologic criteria for effective management of epithelial lacrimal gland tumors. Am J Ophthalmol. Jan 1971;1(1 Part 2):178-92. [Medline].
Gamel JW, Font RL. Adenoid cystic carcinoma of the lacrimal gland: the clinical significance of a basaloid histologic pattern. Hum Pathol. Mar 1982;13(3):219-25. [Medline].
Jakobiec FA, Yeo JH, Trokel SL, et al. Combined clinical and computed tomographic diagnosis of primary lacrimal fossa lesions. Am J Ophthalmol. Dec 1982;94(6):785-807. [Medline].
Jenkins C, Rose GE, Bunce C, et al. Clinical features associated with survival of patients with lymphoma of the ocular adnexa. Eye. 2003;17:809-20. [Medline].
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Mafee MF, Edward DP, Koeller KK, Dorodi S. Lacrimal gland tumors and simulating lesions. Clinicopathologic and MR imaging features. Radiol Clin North Am. Jan 1999;37(1):219-39, xii. [Medline].
Shields JA, Shields CL, Epstein JA, et al. Review: primary epithelial malignancies of the lacrimal gland: the 2003 Ramon L. Font lecture. Ophthal Plast Reconstr Surg. 2004;20:10-21. [Medline].
Stewart WB, Krohel GB, Wright JE. Lacrimal gland and fossa lesions: An approach to diagnosis and management. Ophthalmol. 1979;86:886. [Medline].
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Further Reading
Keywords
neoplastic lesion, orbital lobe, palpebral lobe, epithelial neoplasm
Differential Diagnoses & Workup: Lacrimal Gland Tumors