Untimely bilateral testicular enlargement greater than 3 ml is suggestive of precocious puberty, in which an underlying organic disease is more common in boys than in girls. We describe a 71/2 year-old boy presenting with testicular enlargement due to testicular microlithiasis. Following hormonal tests, diagnosis was based on ultrasonographic findings. Three years follow-up of the patient revealed normal pubertal progress and,,no., malignant evolution. Testicular microlithiasis.-is a rare cause. of testicular enlargement and pediatricians should take this disease into account in the differential diagnosis of suspected precocious puberty.