Normal thymus in adults: appearance on CT and associations with age, sex, BMI and smoking. 74% of participants (mean age years) demonstrated complete fatty thymus. Women show less fatty thymus compared to men at ages years. Smoking and high BMI are associated with advanced fatty degeneration in thymus. The thymus is usually atrophic in the adult, with tan lobules of thymic parenchyma separated by fibrous septae and abundant adipose tissue. Hassell’s corpuscles may be prominent and must be distinguished from metastatic squamous cell carcinoma in a lymph node.
The thymus gland is a small organ behind the breastbone that plays an important function both in the immune system and endocrine system. Though the thymus begins to atrophy (decay) during puberty, its effect in "training" T lymphocytes to fight infections and even cancer lasts for a lifetime. The functions of the thymus that have so far been observed relate chiefly to the newborn. Removal of the organ in the adult has little effect, but when the thymus is removed in the newborn, T cells in the blood and lymphoid tissue are depleted, and failure of the immune system causes a gradual, fatal wasting disease. The animal whose thymus has been removed .
"Removal of the organ in the adult has little effect, but when the thymus is removed in the newborn, T-cells in the blood and lymphoid tissue are depleted, and failure of the immune system causes a. The thymus is a specialized primary lymphoid organ of the immune system. Within the thymus, thymus cell lymphocytes or T cells mature. T cells are critical to the adaptive immune system, where the body adapts specifically to foreign invaders. The thymus is located in the upper front part of the chest, in the anterior superior mediastinum, behind the sternum, and in front of .