Pediatric Radiology

, Volume 37, Issue 6, pp 549–555 | Cite as

Pilomatricomas in children: imaging characteristics with pathologic correlation

  • Hyun Wook Lim
  • Soo Ah ImEmail author
  • Gye-Yeon Lim
  • Hyun Jin Park
  • Heejeong Lee
  • Mi Sook Sung
  • Bong Joo Kang
  • Jee Young Kim
Original Article



Although pilomatricoma commonly occurs in children, there is still a poor understanding of the imaging characteristics of pilomatricoma and lack of agreement regarding its imaging findings and histopathologic features.


To characterize the radiologic appearance of pilomatricomas on US, CT, and MR and to correlate the imaging findings with histopathologic features.

Materials and methods

The imaging findings of 47 pilomatricomas on US (n = 17), CT (n = 31), and MR (n = 5) were retrospectively evaluated. Pathologic specimens of all cases were reviewed and compared with imaging findings.


All lesions were well-circumscribed, subcutaneous nodules with partial attachment to the overlying skin. On US, the lesions were mostly hyperechoic with posterior acoustic shadowing and hypoechoic rim. On CT, they appeared as enhancing soft-tissue masses with varying amounts of calcification. MR findings were internal reticulations and patchy areas on T2-weighted images and contrast-enhanced T1-weighted images, corresponding to edematous stroma on pathology. Peritumoral inflammatory changes and connective capsule on pathology were well correlated with imaging findings.


Pilomatricoma should be considered when US or CT shows a well-defined hyperechoic or calcific nodule in subcutaneous fat attached to the skin in children. MR images may be helpful in diagnosis. Pathologic findings are well correlated with imaging findings.


Pilomatricoma US CT MRI Children 



We thank Bonnie Hami, MA, Department of Radiology, University Hospitals Health System, Cleveland, Ohio, for her editorial assistance in preparing the manuscript.


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Hyun Wook Lim
    • 1
  • Soo Ah Im
    • 1
    Email author
  • Gye-Yeon Lim
    • 1
  • Hyun Jin Park
    • 1
  • Heejeong Lee
    • 1
  • Mi Sook Sung
    • 1
  • Bong Joo Kang
    • 1
  • Jee Young Kim
    • 1
  1. 1.Department of Radiology, Kangnam St. Mary’s HospitalThe Catholic University of KoreaSeoulSouth Korea

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