|Year : 2017 | Volume
| Issue : 2 | Page : 138-142
Study and correlation of clinical, radiological, cytological, and histopathological findings in the diagnosis of thyroid swellings
Anuja Raniwala, DD Wagh, Ashwini Dixit-Shukla, Ninad Shrikhande, Mangesh Padmawar
Department of General Surgery, Acharya Vinoba Bhave Rural Hospital, Wardha, Maharashtra, India
|Date of Web Publication||8-Sep-2017|
Department of General Surgery, Acharya Vinoba Bhave Rural Hospital, Sawangi (Meghe), Wardha, Maharashtra
Source of Support: None, Conflict of Interest: None
Objectives: To study the clinical profile of patients with thyroid swellings. To study the radiological findings of these patients. To study the histopathological outcome. To correlate these factors in order to make diagnosis of malignant thyroid swellings in patients more accurate. Study Design: The present study: 'Study and correlation of clinical, radiological, cytological with histopathological findings in the diagnosis of thyroid swellings' was carried out in Jawaharlal Nehru Medical College and Acharya Vinoba Bhave Rural Hospital, Sawangi Wardha from July 2013 to October 2015 It was carried out as a cross sectional observational study involving OPD based patients requiring further management. The sample size was fixed at 60 patients. All the patients of any age and either gender having goitre requiring surgery were included. Every patient was evaluated in terms of detailed history, thorough examination and relevant investigations. Results: Out of 60 patients, 51 (85%) were female and 9 (15%) were males. Maximum i.e. 22 (36.67%) cases belonged to the age group 41-60 years. More than half i.e. 34 (56.67%) of the patients came with a swelling on one side of the neck. 11 (18.33%) patients came with complains of Solitary nodule of Thyroid. The main complaint was anterior neck and was of grade 3 as per WHO Grading in 28 patients (46.67%). The duration of swelling was between 1-7 years in 30 (50%) patients followed by < 1 year in 17 (28.33%) patients. On clinical examination, 53 (88%) were diagnosed as benign and remaining 7(22%) as malignant swellings. Later on FNAC (done under ultra sound guidance), 8 (13%) patients were diagnosed with malignant swellings. Malignancy was noted in 13 (21.67%) cases on histopathology. A correlation between the diagnosis made pre-operatively on clinical examination, USG and FNAC was made with the Gold Standard for diagnosis of malignant thyroid swellings i.e. Histopathology. Conclusion: Goitre was common in females of middle age and majority had single lobe enlargement. Most of them presented with large goitres which were present since many years. On clinical evaluation, the symptoms suggestive of malignancy were pressure symptoms and lymph node enlargement. Multinodular goitre and colloid cysts were the commonest findings on FNAC. FNAC is a reliable tool of investigation for thyroid nodule. Using a thorough clinical examination, ultrasound and FNAC, a surgeon can reliably diagnose malignancy in thyroid glands and choose appropriate surgery for the treatment of the same. Histopathology is gold standard for confirmation of the diagnosis of malignancy post operatively.
Keywords: Clinical examination, fine-needle aspiration cytology, goiter, histopathology, malignancy, ultrasonography
|How to cite this article:|
Raniwala A, Wagh D D, Dixit-Shukla A, Shrikhande N, Padmawar M. Study and correlation of clinical, radiological, cytological, and histopathological findings in the diagnosis of thyroid swellings. J Datta Meghe Inst Med Sci Univ 2017;12:138-42
|How to cite this URL:|
Raniwala A, Wagh D D, Dixit-Shukla A, Shrikhande N, Padmawar M. Study and correlation of clinical, radiological, cytological, and histopathological findings in the diagnosis of thyroid swellings. J Datta Meghe Inst Med Sci Univ [serial online] 2017 [cited 2019 Jul 16];12:138-42. Available from: http://www.journaldmims.com/text.asp?2017/12/2/138/214198
| Introduction|| |
Thyroid diseases are, arguably, among the most common endocrine disorders worldwide. India too is no exception. According to a projection from various studies on thyroid disease, it has been estimated that about 42 million people in India suffer from thyroid diseases.
As the world advances, nuclear incidents increase, leading to increase in exposure to radiations and therefore in thyroid swellings. An international team of researchers led by the National Cancer Institute, part of the National Institutes of Health found a clear dose–response relationship, in which higher absorption of radiation from I-131 led to an increased risk for thyroid cancer that has not seemed to diminish over time.,
There are very few individuals in surgery that have generated so much controversy as the management of thyroid swellings.
The controversial issues include classification and histology, diagnostic evaluation including needle biopsy, indications for surgery, management of incidentalomas of the thyroid, the role of frozen section, extent of thyroidectomy, management of neck nodes, the role of suppressive therapy, the use of radioactive iodine, and appropriate follow-up.
The clinically solitary nodule may not always be a real solitary nodule but just a dominant nodule of a multinodular goiter (MNG). At times, it may be impossible to clinically differentiate malignancy in thyroid, especially in cases of thyroiditis. Furthermore, previously benign adenoma or MNG can have malignant transformation.
The accurate diagnosis and appropriate management of thyroid swellings hence assume importance. A careful physical examination along with relevant investigations such as fine-needle aspiration cytology (FNAC) and ultrasonography (USG) may be required to reach an exact diagnosis and plan management accordingly. This dissertation highlights the current practices regarding the diagnostic approach and management of thyroid swellings.
The current literature is reviewed to emphasize the changing trends of management. It is hoped that the results of this study will serve in reinforcing our present knowledge and providing guidelines in the management of thyroid swellings.
| Materials and Methods|| |
The present study “study and correlation of clinical, radiological, cytological with histopathological findings in the diagnosis of thyroid swellings” was carried out in Jawaharlal Nehru Medical College and Acharya Vinoba Bhave Rural Hospital, Sawangi, Wardha, from July 2013 to October 2015.
Our research was approved by the review board of Jawaharlal Nehru Medical College and Acharya Vinoba Bhave Rural Hospital.
All patients with thyroid swellings irrespective of age and gender with thyroid swellings who undergo thyroid surgery.
Those patients with thyroid swellings that do not undergo thyroid surgery.
Clinical examination, USG, and FNAC were the most important diagnostic tool.
Postoperative histopathology was used as a confirmatory investigation.
Evaluation of all patients of thyroid swellings presenting to the surgery outpatient department of our institute was done.
A thorough physical examination including indirect laryngoscopy was done in all cases. All individuals underwent standard investigations as required by their condition, such as USG, FNAC and thyroid hormones and thyroid-stimulating hormone assay.
All patients with thyroid swellings who were fit for undergoing surgery were included in the study. X-ray neck was carried out as and when required to aid in diagnosis. Surgery was planned as per established standards and as warranted by the pathology in the goiter. In benign causes of goiter, the indication of surgery was pressure symptoms or patient's wish for cosmesis.
Surgery was considered in all cases that were malignant or suspicious on FNAC. We adopted the “GAMES” criteria laid down by Shaha et al. at Memorial Sloan-Kettering Cancer Center to stratify the patients in low-, intermediate-, and high-risk groups, and the management was individualized accordingly.
This study was only an observational study and no other intervention apart from that warranted by the patient's condition and accepted as a standard of care was done for the study per se.
Various approaches studied included:
- Subtotal thyroidectomy
- Total thyroidectomy
- Above plus neck dissections.
All information obtained on evaluation as above was recorded in a predesigned case record form.
The data obtained from all the patients were tabulated initially on a worksheet-based program such as MS Excel.
Various findings and observations were then represented by way of diagrams and charts. Incidences and relative frequencies of various outcomes/parameters under study were expressed as percentages/proportions. Sensitivity and specificity of certain modalities were assessed.
| Results|| |
In our study of sixty patients, the majority of thyroid cancer patients belonged to 21–40 years age group followed by the 41–60 years age group. Maximum, i.e., 22 (36.67%) cases belonged to the age group 41–60 years, followed by 30 (50%) cases in the age interval 21–40 years, while there were 4 (6.67%) cases in the age groups ≤20 years and >60 years each [Figure 1].
In our study, females cases outnumber the male cases, the ratio of female: male is 5.7:1. The proportion of males was 9 (15%) as compared to females 51 (85%) [Figure 2].
Out of total 60 cases, 34 (56.67%) were unilateral, followed by 15 (25%) cases with bilateral complaints and 11 (18.33%) cases with solitary thyroid nodule (STN) [Figure 3].
The cases were classified on the basis of the who classification, with respect to the grading of swelling. Maximum cases, i.e., 28 (46.67%) cases were WHO Grade 3, followed by 22 (36.67%) cases were Grade 2 and only 10 (16.67%) cases were Grade 1. The pie chart representation of the distribution of cases as per grade is shown in [Figure 4].
Majority of the cases, i.e., 30 (50%) cases had swelling for 1–4 years, while there were 17 (28.33%) cases who had swelling for ≤1 year, followed by 10 (16.67%) cases with duration 4–7 years. This is depicted in [Figure 5].
There were 23 (38.33%) cases with swelling on the right side, while 19 (31.67%) cases had it on the left side. Eighteen (30%) cases had swelling of both sides. Maximum, i.e., 57 (95%) cases moved with deglutition. Fifty-three (88.33%) cases were firm in consistency, while 7 (11.67%) cases were hard. Cervical lymph nodes were palpable in only 6 (10%) cases. There were 14 (23.33%) patients who presented with dysphagia along with thyroid gland enlargement and two patients complained of dyspnea and three patients (5%) of having a change in their voice (hoarseness) in our study. Provisionally on clinical examination alone, 7 out of 60 cases were diagnosed as malignant.
On FNAC, the findings were as per [Table 1]. Maximum cases were diagnosed as MNG and colloid goiter. Eight out of 60 cases were diagnosed as being malignant (follicular, papillary, and medullary carcinoma). No cases of anaplastic carcinoma was detected.
Surgery was performed as per the provisional diagnosis after the 3 parameters were analyzed, i.e., clinical examination, FNAC, and USG and taking into factor the spread of malignancy. Thus, neck dissection was performed for those cases that had cervical lymphadenopathy.
Of total 60 cases, maximum, i.e., 47 (78.33%) cases were diagnosed as benign, while only 13 (21.67%) cases were diagnosed as being malignant on histopathological examination of the specimen postoperatively. Eight out of 13 cases (61%) were of papillary carcinoma. Two each of medullary and follicular carcinoma and one case of anaplastic carcinoma were detected.
| Discussion|| |
Thyroid surgery is the most common endocrine surgery performed around the globe. It got popularity in the early 20th century due to the development of safe anesthesia, invention of sophisticated surgical instrument, and adaptation of antiseptic techniques.
In our study of sixty patients, the majority of thyroid cancer patients belonged to 21–40 years age group followed by the 41–60 years age group. According to Sushel (2009), age is a key prognostic indicator for well-differentiated thyroid cancer.
Gupta et al. observed that the majority of patients (44%) were in their third decade of life. Our observations were also in accordance with the study by Dorairajan and Jayashree.
In our study, females cases outnumber the male cases, the ratio of female: male is 5.7:1. Our observation regarding the gender disparity matches to the majority of studies which have been conducted earlier in Indian scenario or world scenario. Crile et al. had found a female to male distribution of 4:1 in goiters which came to their clinic. Similar male to female ratio was reported by Martenson et al.
Bhansali et al. found a male: female ratio of 3:1 in their series, while Sarda et al. reported a ratio of 1:2.2 between males and females, in their 546 cases.
Our results show a higher rate of incidence of goiters in females in comparison to the Indian studies (Bhansali et al. and Sarda et al.) and can be compared to the results determined by Crile et al.
The ratio of benign lesions in females to that in men is 10.75:1 and that of malignant lesions in females in comparison to men is 1.6:1. Similarly, in a study done by Mathai et al.(1994), the male to female ratio in those with MNG alone was 1:10.8 while in those with carcinoma in MNG was 1:3.2 indicating that males with MNG had a significantly higher chance of developing a malignancy. Yao R et al. (2011) also observed that although more common in women, thyroid cancer typically presents at a more advanced stage and with a worse disease prognosis in men. According to Rahbari et al. (2010), the more aggressive types of thyroid cancer, anaplastic thyroid cancer, and medullary thyroid cancer have similar rates of incidence in men and women. Meanwhile, differentiated thyroid cancer of follicular cell origin, such as follicular thyroid cancer and papillary thyroid cancer, are more common in woman (Chen et al., 2009). An observation done by Kilofy et al.(2009) quotes that in females, the age-specific incidence rate rises sharply at the beginning of the reproductive years, with increasing age peaking at 40–49 years, while in men, the peak is at 60–69 years. The incidence rates equalize by 85 years of age. Women have an earlier age of onset but men tend to have more aggressive disease at diagnosis. Moreover, in most studies, male gender is associated with a lower disease-free survival and higher mortality (Gilliland et al., 1997). As the incidence of thyroid cancer increases, in particular papillary thyroid cancer, the gender differences observed are likely to be even more dramatic.
Majority of the cases in our study, i.e., 30 (50%) cases had swelling for 1–4 years, while there were 17 (28.33%) cases who had swelling for ≤1 year, followed by 10 (16.67%) cases with duration 4–7 years.
In a study done by Sengupta et al., 2012, the duration of swelling ranged from 6 months to 3 years.
While in a study by Panchal et al., 2014, the maximum number of cases 133 (44.33%) had 1–6 months duration of swelling.
Several studies observed patients with neck swelling presenting within variable durations. Maximum studies are there where the patients come for consultation at least after 1 year, very few are there where the cases have been presented before 6 months or 1 year (Mamun et al., 2014; Venkatachalapathy et al., 2012; Cady et al., 1979; Harmo et al., 1979).
The 5-year survival for patients with localized thyroid cancer is 99.9%. The 10-year overall survival is significantly reduced to <10% in patients who are older and have distant metastases (Dadu et al., 2014).
According to the clinical examinations, out of 60 cases, 53 were detected as benign cases while remaining 7 cases as malignant with a ratio of benign versus malignant – 7.57:1. No studies till date have examined the correlation of clinical examination for the diagnosis of malignancy preoperatively versus the final postoperative diagnosis.
FNAC is now accepted as a cost-effective, minimally invasive, most sensitive, and specific low-complication nonoperative diagnosis for most of the thyroid lesions and is highly successful in triaging patients with STN into operative and nonoperative groups (Sengupta et al., 2011; Nggada et al., 2006). The location of the target lesion, careful searching for malignant cells, and repeat FNAC are the keys to successful diagnosis to plan a proper surgical management in thyroid mass (Agrawal et al., 2010; Handa et al., 2008). Thyroid nodules that should be considered for FNAC include any firm, palpable, solitary nodule or nodule associated with worrisome clinical features. Fine-needle aspiration (FNA) biopsy remains the gold standard for evaluating thyroid nodules. Most clinical practice guidelines recommend FNA biopsy for nodules >1 cm in largest dimension (Doherty et al., 2009; Gharib et al., 2006).
FNAC reports of our patients suggested that out of 8 malignant cases, follicular carcinoma and papillary carcinoma were found in 3 cases each while only 2 cases were of medullary carcinoma. Among the benign cases, maximum occurrence was of colloid goiter and MNG followed by nodular goiter and rest others. Very similar to our study, Rout et al., 2011 also observed that colloid goiter was the most common among the thyroid swelling (42.2%) followed by colloid goiter with cystic degeneration (13.2%).
After the preoperative evaluation, patients underwent surgery. Seven out of 13 malignancy cases, i.e., 53.84% cases underwent total thyroidectomy with radical neck dissection. Three (23.07%) underwent total thyroidectomy with central neck dissection. Of the remaining 3, 1 underwent only total thyroidectomy and 2 underwent right lobectomy. We advised radiotherapy to those patients who underwent lobectomy only as the diagnosis was incidental on histopathology. One case was advised resurgery to complete the excision of thyroid gland; this case has been included in the 7 cases that underwent total thyroidectomy with radical neck dissection.
The histopathology of 13 (21.66%) patients was suggestive of malignancy. About 3.33% cases were of thyroiditis and 75% cases were nonmalignant multinodular goiter. Nearly, 13.33% cases were of papillary carcinoma and 3.33% of medullary and follicular carcinoma. Only 1.66% cases were of anaplastic carcinoma. Huque et al. found nonneoplastic nodular goiter in 52.54%, papillary carcinoma in 13.55%, and follicular carcinoma in 3.38% cases.
In the study by Wahid et al., histopathology findings were benign adenomatous colloid nodule in 77.8%, papillary carcinoma in 11.1%, follicular carcinoma in 5.6%, and medullary carcinoma in 4.2% cases. The study of Sushel et al. revealed that histopathology findings were adenomatous colloid goiter in 60%, papillary carcinoma in 7.85%, and follicular carcinoma in 2.1% cases.
| Conclusions|| |
Most of our patients were middle-aged females with complaints of thyroid swellings for 1–4 years. Preoperative diagnosis was more conclusive for benign swellings rather than malignant swellings, i.e., few malignancy cases were missed. Thus indicating the need for better preoperative evaluation of all thyroid nodules so that appropriate surgery is chosen for the individual patient thus reducing the overall morbidity and mortality due to thyroid malignancies.
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Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5]