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Parotid lymphomas--clinical and computed tomographic imaging features.
Neville P Shine1, Gerard O'Leary, Simon P Blake
1Department of Otolaryngology Head and Neck Surgery, Groote Schuur Hospital, Cape Town.
Summary
Parotid lymphoma often presents as a painless, unilateral swelling with indistinct CT imaging margins. Early consideration of lymphoma is crucial for parotid masses, as clinical and imaging findings can mimic other neoplasms.
Area of Science:
- Oncology
- Radiology
- Pathology
Background:
- Parotid gland neoplasms encompass a wide differential diagnosis.
- Accurate and timely diagnosis of parotid masses is essential for appropriate patient management.
Purpose of the Study:
- To review the clinical presentation and computed tomography (CT) imaging characteristics of parotid lymphomas.
- To identify key features that may suggest lymphoma in the differential diagnosis of parotid masses.
Main Methods:
- Retrospective chart review of patients diagnosed with parotid lymphoma between 1997 and 2004.
- Analysis of clinical presentation and CT imaging findings in 8 patients with histologically confirmed parotid lymphoma.
Main Results:
- Ten cases of parotid lymphoma (8.3% of parotid neoplasms) were identified, all non-Hodgkin's type.
- Common CT findings included unilateral, homogeneous masses with indistinct margins; painless swelling was a universal clinical sign.
- A short history (<4 months) and associated lymphadenopathy were noted in some cases, but no pathognomonic findings were identified.
Conclusions:
- Parotid lymphoma shares clinical and imaging similarities with other parotid neoplasms.
- Unilateral, non-tender swelling and a short duration of symptoms may raise suspicion for lymphoma.
- CT is valuable for assessing extent and nodal status, but diagnosis requires consideration of lymphoma in all parotid masses.