Goiter defines an increase in the volume of the thyroid body. The risks associated with surgery for treating thyroid diseases and the problems of adequate hormonal replacement have deterred surgeons from performing total thyroidectomies  .
Surgery is currently an important option in the treatment of some thyroid conditions, especially in oncology. It is also the therapeutic choice for large nodules, multi nodular goitre and hyperthyroidism   .
It has been shown that the complication rates of permanent recurrent laryngeal nerve palsy (0% - 1.3%) and permanent hypoparathyroidism (1%) following subtotal thyroidectomy are similar to those following total thyroidectomy  . In Senegal, the use of surgery for the treatment of thyropathies is frequent because of economic requirements  .
So we did a retrospective study over a period of 06 years. The main objective was to study the indications and results of thyroidectomies in Saint-Louis.
2. Materials and Methods
We conducted a descriptive retrospective study over a period of 06 years. All patients who had consulted for goiter and had thyroidectomy in the department during the study period were included. The paraclinical assessment was clinically oriented and included: thyrotropin dosage, cervical ultrasound and pathological examination of the operative specimen.
The Epi Info 6 computer software was used for data collection and processing.
1) Epidemiological and clinical data (Table 1).
Table 1. Demographic and clinical characteristics.
Our series consisted of 4 men and 77 women, a sex ratio of 0.05. The age of our patients was between 11 and 85 years old with an average of 40 years. The most representative age group was between 30 and 49 years old.
The duration of goitre progression in patients was between one and 180 months with an average of 30.2 months.
In our study 46 of the patients had diffuse goiter or 56.8% of patients; 34 had a lobar location with 20 cases of right lobar goiter (i.e. 24.7% of patients) and 14 cases of left goiter (17.2% of patients). One of the patients had isthmic goitre (1.2%).
Clinical examination in our patients found only 5 cases of compressive goitre, or 6.2% of patients. The stigmata of compression were represented by dysphagia and dysphonia
2) Paraclinical data.
TSH was dosed in all patients. 88.9% (72 patient) were found in euthyroid, 9.9% (8 patients) inhypothyroidism and 1.2% (1 patient) inhyperthyroidism.
Across the sample, 79 patients underwent cervical ultrasound, representing 97.5% of patients.
3) Thyroidectomies and operative follow-up.
Of the 81 thyroidectomies performed in our patients, we identified four types of actions. The Table 2 summarizes all the actions taken.
Duration of hospitalizationvaried between 2 and 4 days, with an average of 2.25 days.
The consequences were simple in all the patients, none of them presented complications in the post-operative period.
In our study 81 patients underwent surgery for the thyroid gland and no deaths were recorded.
Of the 81 thyroidectomies performed, only 18 patients underwent histological examination of the operative specimen, i.e. 22.2%. The distribution of the conclusion of histology is shown in Table 3.
In our study the peak frequency is between 30 and 49 years with an average of 40 years. Studies in Africa and elsewhere have returned to an average age of around 40 years      .
Thyroid pathology has a female predominance supported by the review of 
Table 2. Summary of surgical procedures performed.
Table 3. Results of the histology of the operative specimens.
   . It explains the larger number of women in whom the operative indication is posed. Our study has highlighted this predominance.
Duration of thyroidopathy is long in our patients with an average of 2 and a half years. However, this duration of evolution remains lower than those described in Africa, which varies between 5.8 years and 7 years    . We found signs of compression in patients with heteronodular goiter: dysphagia (3.7% n = 3), dysphonia 1.2 (% n = 1) are the clinical stigmas of this compression. This complication is also found in another study conducted in Dakar, where signs of compression were present in 6.9% of patients  .
88.9% of our patients were in euthyroidism, this clear predominance of euthyroidism is partly related to the fact that the biological balance was always sought by medical treatment before programming the surgery. However, most of our series consisted of nodular goiters (85.2%).
In our study, 1.2% had hypothyroidism while another study in Dakar  was about quadriple (5.7%)
During the study period, 81 thyroid surgeries were performed, and 4 main gestures were performed: left or right lobo-isthmectomy, total and subtotal thyroidectomy.
The surgical procedure depends on the location of the nodules and the appearance of the rest of the parenchyma. The goal is always to remove the pathological areas while leaving in place the healthy parenchyma according to feasibility.
The lobo-isthmectomy is performed in case of nodules occupying the entire lobe, if both lobes are interested with a healthy parenchyma a total thyroidectomy is performed.
In the literature the main indications of nodular goiter were lobo-isthmectomy, subtotal thyroidectomy and total thyroidectomy. The place of choice of lobo-isthmectomy in the management of thyroid pathology, especially if it concerns a part of the gland, makes a broad consensus  -  .
The average length of hospital stay in our series is 2 days. It was significantly more important for Ndour  with (3.4 days).
In the West the patient can return to his home on the second day after the procedure as described by Guerrier B. et al.  .
The follow-up was simple for the 81 thyroidectomies. No patient presented complications in the post operative period. The percentage described in other studies in Senegal is around 7%  .
Mortality in thyroid surgery is rare. Several series have described zero mortality   . The Ndour study  noted a mortality of 0.5.
In our series, 18 patients (22.2% of the series) had exploitable histology. Dieng  had a contribution to histology in 59.3% of patients in his series. In another study done in Dakar 87.5% of exploitable histology was found  .
Histological examination of the operative specimen should be systematic after thyroidectomy. This availability of anatomopathological examination is not yet in the routine of our technical trays but reinforces the quality of care.
Thyroid pathology is common in Senegal with a predominance of hetero-multinodular goiters.
Thyroid surgery remains a credible alternative in management with convincing results, but the approach must be multidisciplinary.
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