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Hypertrophic cranial pachymeningitis involving the pituitary gland: a case report
Background:
As the use of magnetic resonance imaging (MRI) has become widespread, the reported cases of pachymeningitis have increased. Various inflammations are known to occur in the pituitary gland. However, an association between pachymeningitis and pituitary inflammation has not been recognized previously.
Case Description:
This 56-year-old woman complained of incessant headache and deafness. MRI showed thickened dura at the right convexity and a dumbbell shaped pituitary enlargement, which was isointense to the gray matter (T1-weighted images) and homogeneously enhanced. Microscopic examination of the dura mater showed a marked increase of collagen fibers and various inflammatory cells. The anterior pituitary lobe was infiltrated with lymphocytes, and normal tissues were displaced by increased collagen fibers.
Conclusion:
Hypertrophic cranial pachymeningitis, a rare clinical entity, is a progressive lesion prone to include the dura mater at the skull base and can be fatal. We report a case of hypertrophic cranial pachymeningitis involving the pituitary gland, and discuss the possible etiology of the association.
Insights
Hypertrophic cranial pachymeningitis can involve the pituitary gland, a previously unrecognized association. This rare condition presents with headache and deafness, highlighting the need for comprehensive MRI evaluations.
Area of Science:
- Neurology
- Endocrinology
- Pathology
Background:
- Magnetic resonance imaging (MRI) has increased pachymeningitis diagnoses.
- Pituitary gland inflammation is known, but its association with pachymeningitis is undocumented.
Observation:
- A 56-year-old woman presented with persistent headache and hearing loss.
- MRI revealed thickened dura mater and a dumbbell-shaped pituitary enlargement.
- Microscopic analysis showed dural inflammation and pituitary infiltration by lymphocytes and collagen.
Findings:
- The case demonstrates hypertrophic cranial pachymeningitis extending to involve the pituitary gland.
- Histopathology confirmed inflammatory cell infiltration and fibrosis in both dura and pituitary.
Implications:
- This case expands the known clinical spectrum of hypertrophic cranial pachymeningitis.
- The findings suggest a potential link between dural inflammation and pituitary pathology.
- Further research is warranted to elucidate the etiology and pathogenesis of this association.