Tayyiba Wasim ( Department of OBG, Services Institute of Medical Sciences )
Ashraf Majrroh ( Department of Community Medicine, Allama Iqbal Medical College, Lahore. )
Saqib Siddiq ( Department of OBG, Services Institute of Medical Sciences )
January 2009, Volume 59, Issue 1
Original Article
Abstract
Methods: It was a consecutive case series study. All patients who on abdominal or bimanual examination and abdominal U/S were found to have ovarian cyst or tumour, and later underwent laparotomy were included.
Results: The study included 110 patients, of whom 80 (72%) had benign and the rest malignant disease. Mean age of patients with malignancy was 49.07±18.5 years and for benign 36.95±8.2 years (p= 0.0001). Eleven patients with benign tumours were asymptomatic, while 66% had abdominal pain. On the other hand 70% patients with ovarian malignancy had abdominal symptoms with abdominal pain in (76%). Abdominal enlargement and abdominal mass were significantly more in malignant tumours (p=0.003, p= 0.005). Gastrointestinal symptoms were present in both groups but more significant in malignant group (p=0.004). Constitutional symptoms like loss of appetite and weight loss were only present in malignant group (p=0.001). Seventy percent of the malignant tumours presented at late stage (III & IV). Histopathology of benign tumours revealed follicular/luteal cyst in 32% cases while serous cyst adenoma in 23%. Histopathology of malignant tumours showed serous cyst carcinoma in 46.7% and mucinous cyst carcinoma in 26% cases.
Conclusions: Ovarian malignancy is a silent killer, especially affecting women above 50 years. Although presentation is often vague and non specific, symptoms are definitely present. Therefore a proper bimanual examination and appropriate investigations should be done at the outset in post menopausal women (JPMA 59:18; 2009).
Introduction
Structural changes in ovary are responsible for formation of benign and malignant tumours. These tumours can arise from the epithelial wall of the ovary (serous, mucinous tumours), germinal epithelium (teratomas) or connective tissue of the ovary (fibroma, sarcoma). They can also originate from ovarian endometriosis (endometriomas). These tumours may be cystic or solid. Solid ovarian tumours are malignant in 80% of cases and should be dealt seriously.
Proper diagnosis of ovarian lesions is extremely important to differentiate between benign and malignant disease as 20 - 30% of all ovarian tumours are malignant.7 The suspected diagnosis of benign or malignant lesions should take the history and bimanual examination into account. Ultrasound is the standard investigation for identifying ovarian pathology as it gives information regarding the origin, consistency, vascularity, or complexity of a tumour, but definitive diagnosis can only be made by a tissue biopsy. The rationale of our study was to compare clinical presentation of benign and malignant ovarian tumours. It also aimed to enlist and identify symptoms that could lead to early diagnosis of ovarian carcinoma.
Patients and Methods
Detailed ultrasonography was done by an experienced operator. If an ovarian tumour was detected then documentation was made regarding tumours dimensions and consistency i.e. solid or cystic. If cystic, then characteristics like cyst wall thickness and regularity, presence of septae, papillations, uni locular or multi locular were noted.
All patients were subjected to laparotomy. Patients presenting in emergency with complications of ovarian cyst like torsion or haemorrhage were also included. At laparotomy staging of tumour was done according to FIGO classification,8 as well as biopsy was sent for histopathological examination.
Main outcome measures were age, symptoms of the patient, stage and histopathology of tumour.
All the data was analyzed on SPSS version 10. Percentages and 95% CI was calculated. Chi-square test was applied to compare the symptoms of benign and malignant ovarian tumours.
Results
Discussion
Increasing amount of data reports that most women with ovarian cancer suffer from non specific constitutional, abdominal, pelvic, urinary or other symptoms prior to diagnosis. Therefore the women suffering from these non specific symptoms are an important population to target for ovarian tumour screening.
Several studies have shown that women with ovarian cancer experience abdominal, gastrointestinal and constitutional symptoms, more as compared to those with benign tumours.7,10-13 Our study has similar results, showing abdominal, gastrointestinal and constitutional symptoms to be significantly more marked in patients with malignant disease. Studies have compared these symptoms in normal women as well as in patients with early and late stage ovarian cancer. One study showed that 95% of women with ovarian cancer visiting primary care physicians, reported at least one of the above mentioned symptoms.6 A study including 1752 ovarian cancer patients concluded that 95% of patients reported symptoms, 77% had abdominal symptoms, 70% gastrointestinal, 50% constitutional, 58% pelvic pain and 38% had urinary symptoms.14
Abdominal pain was the most common presentation in both groups in our study, but was not statistically different, whereas other studies have reported more association with malignant disease.10,12 In benign group this could have been due to the increased tumour size, ascites, endometriomas and complications of ovarian cyst, as most patients presented late. On the other hand abdominal enlargement was significant in malignant patients, both due to increased tumour size and presence of ascites. The latter has been studied independently as a predictor of malignancy with a 95% positive predictive value to detect an ovarian malignancy, but carries a 64% negative predictive value as well (because 80% of early stage malignant tumours do not produce ascites).15 Eleven percent of our patients were asymptomatic, all belonged to benign group and were diagnosed during routine evaluation for another problem. None of our cancer patients was asymptomatic while few other studies have reported 7-15% of ovarian cancer patients to be asymptomatic.14,16
Targetting women with specific symptoms and possibility of development of a symptom index has been recommended by a study form USA.17 RD Rumford has strongly suggested that screening of woman for ovarian cancer can be done using symptoms as selection criteria.18
Family history of ovarian and breast cancer is a strong risk factor for ovarian cancer15,18 as it may indicate presence of inherited germ line mutation in either BRCA -1or BRCA - 2. In our study family history was not found to be a risk factor, and it may be due to small study size.
Ultrasound has been used to identify type, site, and size of a tumour. Majority of studies have concluded that ultrasound carries a sensitivity of 92% and specificity of 97%, while few studies have reported a limited role for ultrasound as an independent investigation for detecting ovarian carcinoma.19-21
In our study 72% patients had benign ovarian tumours. Similar percentage has been shown in other studies.11,16,22 Follicular cyst and corpus luteal cyst were commonest (32%) in benign groups. This is similar to a study from India.23 Histologically, surface epithelial tumours were commonest (46%) in malignant group. This is similar to almost all studies.10-15,24 Teratomas were seen both as benign (dermoid cyst) and malignant form (immature teratomas). Similar proportion is reported in other studies.13,14,25
The mean age for benign group was 36.95±8.2 years in our study. Younger age group is reported in other studies as well.10-13,22,23 Six patients with malignancy were less than 35 years age but 80% of patients with malignancy were in the older age group (> 50 years). Similar results have been shown by other studies.5,7,10,16 So, women aged 50 and above with non specific symptoms related to GI system or abdominal involvement should be assessed carefully. They should be subjected to bimanual examination and pelvic ultrasound, so that ovarian cancer diagnosis may be achieved earlier. Late presentation was encountered in 70% of our malignant patients (Stage III-IV). Delay in presentation is one of the big dilemmas with ovarian cancer and is responsible for high mortality associated with the disease. Similar delays have been reported in other studies.6-11,24-25 Reasons for delay were non-specific symptoms, inadequate health care system, omission of pelvic examination at presentation, illiteracy and poverty. The symptoms were not taken seriously as they were considered normal for age and menopause.
Conclusion
References
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