Macrotesticular disorder refers to an increase in testicular volume, with patients typically having a testicular volume greater than 30 milliliters. The testes are the male reproductive organs, and a normal adult male testicular volume is usually between 15 ml and 25 ml, with patients with megalorchidism typically having a testicular volume greater than 30 ml. Macrotesticular disorder may be associated with testicular syringomyelia, which occurs when there is too much fluid in the testicular syringomyelia cavity, resulting in an imbalance in the ratio of secretion to absorption, manifesting as less fluid being absorbed than being secreted. When the amount of fluid in the testicular sheath lumen is low, there are no noticeable symptoms, and it may be detected incidentally during a bath or physical examination. When the amount of fluid in the testicular sheath lumen is high, it will lead to an increase in the volume of the testicular sheath lumen, which will lead to an increase in the size of the testicle by appearance or palpation. In the clinic when the patient has abnormal enlargement of the testicle should seek medical treatment in time, under the guidance of specialized doctors for targeted treatment.