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Symptomatic hypertrophic pacchionian granulation mimicking bone tumor: case report
T Kuroiwa1, Y Kajimoto, T Ohta
1Department of Neurosurgery, Osaka Medical College, Japan.
Neurosurgery
|October 1, 1996
Summary
Hypertrophic pacchionian granulation is a rare condition that can mimic bone tumors. This case highlights its importance in the differential diagnosis of cranial osteolytic lesions.
Area of Science:
- Neuropathology
- Neurosurgery
- Radiology
Background:
- Osteolytic lesions of the cranium present a diagnostic challenge due to their varied etiologies.
- Pacchionian granulations are normal arachnoid projections that can, in rare cases, become hypertrophic.
Observation:
- A 46-year-old woman presented with a symptomatic frontoparietal mass and radiographic evidence of punched-out cranial lesions.
- Imaging revealed hypodense masses with outer table defects, exhibiting characteristic MRI signal intensities and contrast enhancement patterns.
Findings:
- Surgical resection of the masses confirmed the diagnosis of hypertrophic pacchionian granulation.
- Histopathological examination revealed enlarged pacchionian granulations causing focal bone erosion.
Implications:
- This case underscores the importance of considering hypertrophic pacchionian granulation in the differential diagnosis of calvarial osteolytic lesions.
- Accurate diagnosis can prevent unnecessary aggressive surgical or oncological interventions.