%0 Journal Article %T A 10 %A Anthony I Squillaro %A Eugene S Kim %A Shengmei Zhou %A Stefanie M Thomas %J Pediatric and Developmental Pathology %@ 1615-5742 %D 2019 %R 10.1177/1093526618819605 %X Precocious puberty in an infant is an alarming and infrequent finding, making the differential diagnosis difficult for practitioners. Precocious puberty secondary to a sclerosing stromal tumor (SST) of the ovary is rare. We present a case of a child that began precocious puberty at 3 months of age including development of breast buds, pubic hair, growth spurt, and menarche 5 days prior to presenting to pediatric endocrinology at 10 months. She underwent right salpingo-oophorectomy which demonstrated a soft tissue mass occupying almost the entire ovary with a tan-pink fleshy cut surface. Histological examination confirmed a variant of SST. This case represents an extremely young onset of precocious puberty secondary to a variant of SST without hormonal elevation %K precocious puberty %K sclerosing stromal tumor %K ovarian tumor %K breast bud development %K menarche %K thelarche %U https://journals.sagepub.com/doi/full/10.1177/1093526618819605