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Pericoccygeal hidrocystoma

S C Chin1, C Y Chen, R A Zimmerman

  • 1Department of Diagnostic Radiology, Tri-Service General Hospital, National Defensive Medical Center, Taipei, Taiwan, ROC.

AJNR. American Journal of Neuroradiology
|April 16, 1998
PubMed
Summary

This study details the imaging characteristics of a rare pericoccygeal hidrocystoma. The cystic lesion was visualized using sonography, CT, and MRI, with histopathology confirming an apocrine hidrocystoma.

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Area of Science:

  • Medical Imaging
  • Dermatopathology
  • Oncology

Background:

  • Hidrocystomas are benign cystic tumors arising from sweat glands.
  • Pericoccygeal location of hidrocystomas is exceptionally rare.
  • Accurate diagnosis relies on a combination of imaging and histopathology.

Observation:

  • A 52-year-old woman presented with a large cystic lesion in the pericoccygeal area.
  • Sonography revealed a cystic mass with internal echoes.
  • Computed Tomography (CT) demonstrated a well-defined, low-density mass.
  • Magnetic Resonance (MR) imaging showed a high-signal-intensity mass on T1- and T2-weighted sequences.

Findings:

  • Imaging findings were consistent with a cystic neoplasm.
  • Histopathologic examination confirmed the diagnosis of apocrine hidrocystoma.
  • The pericoccygeal location is a unique feature of this case.

Implications:

  • This case expands the known anatomical locations for hidrocystoma presentation.
  • Radiologists and clinicians should consider hidrocystoma in the differential diagnosis of pericoccygeal cystic lesions.
  • Multimodality imaging is crucial for characterizing such rare lesions.

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