ABSTRACT
BACKGROUND AND PURPOSE: The posterior thyroid tubercle, also known as ZT, is an important surgical landmark due to its close proximity to the recurrent laryngeal nerve. A recent case of ZT with a nodular configuration caused clinical concern but was shown on biopsy to be normal thyroid tissue. The purpose of this study was to review a series of CT neck studies to identify how often ZT-specifically, a nodular subtype-was present. MATERIALS AND METHODS: A total of 96 neck CTs from sequential patients were retrospectively identified from January 2010 to July 2010. ZT was defined on imaging as a thyroid lobe extending posterior to the tracheoesophageal groove. A nodular subtype was defined as having a narrowed neck at the level of the tracheoesophageal groove. RESULTS: There were 31 women and 45 men (mean age of 56.1 years, range 22-100 years) who met inclusion criteria. Sixty-seven patients had thyroid glands that extended posterior to the tracheoesophageal groove at CT imaging; this finding was bilateral in 43 patients, more commonly on the right (60 versus 49). Thirty-two of these patients (42.1%; 16 male, 16 female) had a nodular subtype. CONCLUSIONS: ZT is an important surgical landmark of the thyroid that has important radiologic variations. It has a nodular shape in over a third of CT neck studies in our series. Recognition of this feature of the thyroid gland at CT imaging can obviate the need for biopsy and avoid potential recurrent laryngeal nerve injury.
Subject(s)
Thyroid Diseases/diagnostic imaging , Thyroid Gland/diagnostic imaging , Tomography, X-Ray Computed/methods , Adult , Aged , Aged, 80 and over , Diagnosis, Differential , Female , Humans , Male , Middle Aged , Reproducibility of Results , Sensitivity and Specificity , Thyroid Gland/abnormalities , Young AdultABSTRACT
Hypertension is one of the major causes of cardiovascular morbidity and mortality. Community based studies in the rural areas of Tamil Nadu on the prevalence of hypertension and its associated risk factors are scarce. A cross-sectional study was undertaken among a sample of 406 individuals (45-60 years) selected by the standard 30 cluster systematic random sampling technique to find out prevalence of hypertension and its associated risk factors in a rural area of Tamil Nadu. Chi-square test and multiple logistic regression were employed using SPSS package. The overall prevalence of hypertension was 33% and higher among sedentary type (41%). In bivariate analysis many of the independent variables correlated with hypertension, but in multivariate analysis, only body-mass index, family history and age remained significant.
