الفهرس 
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Abstract
Ovarian cancer is common and accounts for about 6% of female malignancies. Radiologists have to be familiar with the ovarian lesions and able to findings that can differentiate between benign and malignant lesions, as determination is very critical and mostly depends on imaging.
US is the modality of choice for assessment of ovarian lesions as it is readily available in most of health care units.
Gynecological complains are indicators for preforming US to assess the cause, and proper diagnosis and plan of management.
Many studies have examined the ability of using US in differentiation between benign and malignant ovarian masses, based on the morphological features of the ovarian mass.
This study aimed to assess the role of US, especially using structured scoring systems as IOTA in discrimination between benign and malignant ovarian masses.
The simple rules provide good discrimination between benign and malignant lesions and can be applied on about 80% of the lesions and are very useful in our daily practice.
The main limitation of both IOTA LR2 and simple rules are that both need histopathological assessment as the gold standard, so many lesions were excluded as they do not need any surgical intervention.
The disadvantage of the IOTA simple rules are that presence of inconclusive results that needs further assessment by either assessment of the sonographic pattern or by further contrast-enhanced MRI.
The major limitation of this study was the small sample size.
Data was collected by history taking, including age, complaint, parity, contraception, menstrual history, presence of previous gynecological history and family history of gynecological malignancies. US morphological features were interpreted using IOTA simple rules and LR2 models and pathological findings were compared with.
Fifty-two patients with ovarian lesions were studied and the following findings were interpreted:
1. The age of the female patients ranged from 10 to 70 years most of the patients were in the child bearing period.
2. Abdominal pain is the commonest complain, which was found in 38 patients (73.1%).
3. The main complain of patients with benign ovarian lesion was abdominal pain accounts for 81% while with malignant ovarian lesion was abdominal mass/distension was 60%.
4. Our study found that 10 patients (19.2%) were pathologically proved to have malignant ovarian lesion while 42 patients (80.8%) have benign lesion.