Subclinical nodular goiter associated with Hurthle cell, papillary, and adenomatoid hyperplasic nodules in the dromedary camel in the Sultanate of Oman

AbstractGoiter and other iodine deficiency disorders (IDD) are a worldwide problem. IDD prevalence rate of 52.7% has been reported among school children aged 9 –12 years in Dhofar region, (WHO2006) which resides adjacent to the Arabian Sea in the Sultanate of Oman. In a preliminary survey, 39.5 and 44.7% of the dromedary camels in the region exhibited low total T3 and total T4, respectively. An abattoir survey was carried out and the dromedary camels examined during the anti-mortem were clinically normal. Post-mortem examination of both thyroid lobes of slaughtered camel, revealed normal weight but 69.5% of these showed nodules of various sizes, numbers, shapes, colors and consistency in the capsular region and or deeply embedded in thyroid tissue. A wide range of histopathological changes were seen and categorized according to the dominant histological pattern into Hurthle cell nodules, papillary hyperplastic nodules, adenomatoid hyperplastic nodules and nodular colloid goiter only. The Hurthle cell nodules were either solid encapsulated cords or follicular variants of well-encapsulated macrofollicles and microfollicles of different sizes and shapes, and the Hurthle cells were seen lining the colloid follicles or forming the solid cords. In the papillary hyperplastic nodules, majority of cases lack capsule, the fronds were multiple and variable, and usually do not compress the surrounding parenchyma. Adenomatoid hyperplastic nodules formed of encapsulated follicular nodul...
Source: Comparative Clinical Pathology - Category: Pathology Source Type: research