SPR's Unknown Case

Welcome to the bi-weekly unknown pediatric radiology case page!

The current unknown case is at the top; the previous cases are shown below with their answers.

We will be displaying the current case as an unknown for approximately two weeks, and will be accepting your answers during that time period. Please submit only one answer per case.  Answer forms will only be accepted until the case has been switched and the diagnosis has been posted.

At the end of the year, the individual with the most correct answers will be honored with a prize (fellows and residents will be judged separately from attendings).

If you would like to submit an unknown case for consideration to be displayed in the future, please go to this online form and follow the instructions.

Want to receive an email when a new case is posted? Join the list here.

Unknown Cases 121 - 130

Unknown Case #129


11-year-old African American female with a history of persistent high spiking fevers and intermittent back pain.

Authors: Monica Epelman MD and Carolina Guimaraes MD, Nemours Children's Hospital

Submit an answer for the current case


Unknown Case #128


Eosinophilic Granuloma (EG) of the spine

Authors: Albert Roh MD Maricopa Medical Center, Jawad Hussain BS University of Arizona College of Medicine, Phoenix


Unknown Case #127



Authors: Daniel Rosenbaum MD and Richard Bellah MD, Children’s Hospital of Philadelphia


Unknown Case #126


Tracheobronchial Papillomatosis

Authors: Rohit Khanna MD and Mittun Patel MD, Phoenix Children's Hospital


Unknown Case #125


Dermoid cyst

Authors: Summer Kaplan MD and Richard Bellah MD, The Children's Hospital of Philadelphia


Unknown Case #124


Liver adenomatosis

Author: Shahnaz Ghahremani MD, UCLA


Unknown Case #123


Meconium peritonitis

Authors: Katie St. Germain MD, Kiery Braithwaite MD, and Shelli Bank MD, Emory


Unknown Case #122


Metastatic Retroperitoneal Paraganglioma

Authors: Albert Roh MD and Deepa Biyyam MD, Phoenix Children's Hospital


Unknown Case #121



Author: Majid AlMotairi MD, King Fahad Medical City


Unknown Cases 111 - 120

Unknown Case #120

Small bowel obstruction due to multiple magnet ingestion

Authors: Kristin Constantino MD and Richard Southard MD, Phoenix Children's Hospital

Unknown Case #119

Fetal Caudal Regression Syndrome

Author: Hollie Jackson MD, Children's Hospital Los Angeles

Unknown Case #118

Post-transplant lymphoproliferative disorder (PTLD)

Authors: Trevor Davis DO and Ian Cassell MD, Phoenix Children's Hospital

Unknown Case #117

Mature Sacrococcygeal Teratoma, Type IV

Authors: Amanda Marshall MD and Mittun Patel MD, Phoenix Children's Hospital

Unknown Case #116

Meckel’s diverticulum

Authors: Saveen Ahuja MD and Sarah M. Desoky MD, University of Arizona

Unknown Case #115

Ewing sarcoma

Authors: David Aria MD and Smita Bailey MD, Phoenix Children's Hospital

Unknown Case #114

Infantile myofibroma

Authors: Seth Vatsky DO and Mostafa Youssfi MD, Phoenix Children's Hospital

Unknown Case #113

Phosphaturic mesenchymal tumor (aka oncogenic osteomalacia, tumor-induced rickets)

Authors: Shannon Farmakis MD, Marilyn Siegel MD, and Barry Siegel MD, Mallinckrodt Institute of Radiology at Washington University School of Medicine

Unknown Case #112

Renal cell carcinoma associated with a chromosomal translocation (i.e. t(X, 17))

Authors: Matthew O'Dell MD, MPH and Gregory Logsdon MD, Florida Hospital for Children

Unknown Case #111


Authors: Cynthia Lumby MD and Edward Richer MD, University of Kentucky


Unknown Cases 100 - 110

Unknown Case #110


Unknown Case #109


Cuboid-navicular tarsal coalition

Authors: Matthew O'Dell MD, MPH and Gregory Logsdon MD, Florida Hospital for Children

Unknown Case #108


Acute tibiotalar synovitis with hemarthrosis, in a patient with the underlying diagnosis of hemophilia.

Authors: Agustin Cardenas MD and Peter "Buzz" Marcovici MD, UCSF Benioff Children´s Hospital

Unknown Case #107


Twin reversed perfusion arterial sequence

Author: Mariana Meyers MD, Children's Hospital Colorado

Unknown Case #106


Chronic recurrent multifocal osteomyelitis (CRMO)

Author: Shahnaz Ghahremani MD, UCLA

Unknown Case #105


Enteric (duodenal) duplication cyst

Author: Maria A. Calvo-Garcia, MD, Cincinnati Children's Hospital Medical Center.

Unknown Case #104


Extra-renal rhabdoid tumor

Unknown Case #103


Klippel Trenaunay Syndrome

Unknown Case #102

Pigmented villonodular synovitis

Unknown Case #101


 Fishtail deformity

Unknown Case #100

Agenesis of corpus callosum, subependymal gray matter heterotopias, cyst at foramen of Luschka, and coloboma.

Unknown Cases 90 - 99

Unknown Case #99

Congenital meniscoid articular disc of the TFCC

Unknown Case #98

Interstitial pregnancy






Unknown Case #97

Gastric duplication cyst

Unknown Case #96


Neonatal onset multisystem inflammatory disease

Unknown Case #95

 Gastric duplication cyst

Unknown Case #94

Primary Sclerosing Cholangitis

Unknown Case #93

Morgagni hernia


Unknown Case #92

Kaposiform hemangioendothelioma 



Unknown Case #91


Unknown Case #90

Lipoid pneumonia 


Unknown Cases 80 - 89

Unknown Case #89

Congenital pulmonary airway malformation (CPAM), Type 1

Unknown Case #88

Multiple Hepatic Hemangioma

Unknown Case #87

Treacher-Collins Syndrome


Unknown Case #86

Androgen Insensitivity Syndrome



Unknown Case #85

Retroperitoneal Teratoma

Unknown Case #84


Unknown Case #83

Paget Schroetter Syndrome

Unknown Case #82


Unknown Case #81

Tuberous Sclerosis

Unknown Case #80

Burkitt's lymphoma with intussusception

Unknown Cases 67 - 79

Unknown Case #79

Hepatic venoocclusive disease


Unknown Case #78

Cecal Volvulus

Unknown Case #77

CPAM - Hybrid congenital pulmonary malformation CCAM & sequestration


Unknown Case #76

Lemierre’s syndrome


Unknown Case #75

Gastric Bezoar

Unknown Case #74

Potter's Syndrome

Unknown Case #73

Amniotic Band Syndrome


Unknown Case #72




Unknown Case #71

IBD related arthropathy

Unknown Case #70

Choroid Plexus Papilloma


Unknown Case #69

Unknown Case #68

Walker-Warburg Syndrome

Unknown Case #67

Congenital absence of the pericardium

2013-2014 Case Winners

Attending category

  • Clara Ortiz-Neira,  Alberta Children’s Hosp. - Calgary
  • Sniya Sudhakar,  Christian Medical College, Vellore, India

Fellow / Resident category

  • John Krol, University of Kentucky
  • Ammie White, Children’s Hospital of Pennsylvania
  • Mahmoud Zahra, Women & Children’s Hosp.-  Buffalo, NY

SPR's Unknown Case Team

  • Peter "Buzz" Marcovici, MD, Assistant Web Editor - Unknown Case
  • Benjamin Taragin, MD, Web-editor
  • Mary B. Wyers, MD, Web-editor Emeritus