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Published on: February 22, 2019
Primary vaginal malignancies: a single oncology centre experience
Mariana Lima1, Gisela Rio2, Mariana Horta3
1a Department of Radiology , Centro Hospitalar de Lisboa Central (Hospital de Santo António dos Capuchos), Alameda de Santo António dos Capuchos , Lisboa , Portugal.
This study reveals distinct MRI features differentiating vaginal squamous cell carcinoma (SCC) and adenocarcinoma. Adenocarcinomas were heterogeneous on T2WI, while SCCs were homogeneous, aiding in diagnosis of these rare vaginal malignancies.
Area of Science:
- Gynecologic Oncology
- Radiology
- Medical Imaging
Background:
- Primary vaginal malignancies are rare, necessitating accurate diagnostic tools.
- Magnetic Resonance Imaging (MRI) plays a crucial role in evaluating these tumors.
- Previous studies suggest characteristic MRI appearances for squamous cell carcinoma (SCC) and adenocarcinoma.
Purpose of the Study:
- To retrospectively analyze clinical and MRI features of primary vaginal malignancies.
- To identify distinguishing MRI characteristics between SCC and adenocarcinoma.
- To explore associations with patient history, such as previous hysterectomy.
Main Methods:
- Retrospective analysis of 35 primary vaginal malignancy cases over 11 years.
- Inclusion of clinical data and detailed MRI feature assessment.
- Statistical comparison of tumor characteristics based on histologic subtype.
Main Results:
- Squamous cell carcinoma (SCC) was the most frequent subtype (77.1%), followed by adenocarcinoma (14.3%).
- Adenocarcinomas showed heterogeneous T2-weighted imaging (T2WI) appearance, while SCCs were predominantly homogeneous (p=0.0001).
- Adenocarcinomas originated from the anterior vaginal wall, whereas SCCs favored the posterior wall. An association between vaginal SCC and prior hysterectomy with cervical dysplasia was noted.
Conclusions:
- MRI T2WI heterogeneity is a significant indicator for vaginal adenocarcinoma, contrasting with the homogeneous appearance of SCC.
- MRI findings can provide initial clues to the histologic type and potential aggressiveness of vaginal malignancies.
- Further research into MRI features can enhance the understanding and management of these rare cancers, complementing histologic diagnosis.
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