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Final ID: Poster #: CR-011

Cutting Through the Fat: A Rare Case of Paratesticular Lipoblastoma on Ultrasound

Purpose or Case Report: Intrascrotal lipoblastomas are rare, benign paratesticular tumors that arise from embryologic adipose tissue and most often affect young children. Due to the rare nature of these tumors, preoperative diagnosis can be challenging, despite imaging features that are somewhat distinctive with respect to more common lesions (e.g., rhabdomyosarcoma). Prospective diagnosis, however, has potential to influence the operative management strategy (for example, minimally invasive mass excision versus radical inguinal orchidectomy). Since 2016, only two cases of preoperative imaging diagnosis of scrotal lipoblastoma have been published. This case report will describe a unique case of an incidentally found intrascrotal lipoblastoma and discuss the pertinent sonographic features of this rare entity. A 3-year-old boy initially presented for evaluation for an atrophic and undescended right testicle. During that evaluation, the patient was incidentally found to have a palpable left scrotal mass. Subsequent scrotal ultrasound showed an 2.7 x 1.9 x 2.4 cm well circumscribed ovoid mass inferior to the left testicle which was in the inguinal canal. The mass appeared predominantly hypoechoic with mild internal vascularity and also contained areas of hyperechogenicity resembling fat. The ultrasound appearance of the mass was not felt to be typical of a rhabdomyosarcoma (the most common paratesticular mass in children) and other fat-containing masses, including lipoblastoma, were suggested as diagnostic considerations. Complete excision of the left paratesticular mass was successful and subsequent scrotal orchidopexy was performed. Microscopic examination of the mass demonstrated lobules of adipocytes with occasional lipoblasts. Rearrangement of the PLAG1 (8q12.1) locus was detected, confirming the diagnosis of lipoblastoma. Although rare, prospective imaging detection of intrascrotal lipoblastoma may allow for less invasive and morbid surgical intervention and decreased risk for local recurrence.
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  • England, Elizabeth  ( Vanderbilt University Medical Center , Nashville , Tennessee , United States )
  • Sarma, Asha  ( Monroe Carell Junior Children's Hospital at Vanderbilt , Nashville , Tennessee , United States )
  • Thomas, John  ( Monroe Carell Junior Children's Hospital at Vanderbilt , Nashville , Tennessee , United States )
  • Liang, Jiancong  ( Vanderbilt University Medical Center , Nashville , Tennessee , United States )
  • Snyder, Elizabeth  ( Monroe Carell Junior Children's Hospital at Vanderbilt , Nashville , Tennessee , United States )
Session Info:

Posters - Case Report

GU

SPR Posters - Case Reports

More abstracts on this topic:
Pelvic lipoblastoma: a rare diagnosis in an atypical location.

Ledbetter Karyn, Leino Daniel, Trout Andrew

Lipoblastomas- 50 Shades of Fat: A Pictorial Review

Emerson Miriam, Isaacson Jared, Chauvin Nancy, Dahmoush Hisham

More abstracts from these authors:
More Than Meets The Eye: A Lens on Less Common Manifestations of Phakomatosis for the Pediatric Radiologist

England Elizabeth, Snyder Elizabeth, Pastakia Devang, Pruthi Sumit, Sarma Asha

The Pediatric Radiologist’s Guide to Cancer Predisposition Syndromes

Patel Arjun, Sarma Asha, Krishnasarma Rekha, Benedetti Daniel, Pruthi Sumit, Snyder Elizabeth

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