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A large functioning parathyroid lipoadenoma found in the posterior mediastinum
American Journal of Clinical Pathology
|July 1, 1981
Summary
A rare parathyroid lipoadenoma presented as a large mediastinal mass, causing hyperparathyroidism and voice changes. This case highlights how large tumors can herniate, leading to unusual clinical presentations.
Area of Science:
- Endocrinology
- Thoracic Surgery
- Pathology
Background:
- Mediastinal masses can present with diverse clinical symptoms.
- Hyperparathyroidism is typically associated with parathyroid adenomas, usually located in the neck.
Observation:
- A patient presented with voice changes and was found to have a large posterior mediastinal mass.
- Laboratory findings indicated hyperparathyroidism.
- Histologic examination of the resected 190g tumor revealed a parathyroid lipoadenoma.
Findings:
- The parathyroid lipoadenoma displayed a diffuse mixture of parathyroid glandular elements and fatty/myxoid stroma.
- Ultrastructural analysis confirmed a uniform population of chief cells with organelles suggesting slow hormone production.
- The stromal component exhibited characteristics of loose connective tissue.
Implications:
- Large parathyroid lipoadenomas can herniate into unusual locations like the mediastinum, causing diagnostic challenges.
- This case expands the understanding of the clinical and pathological spectrum of parathyroid tumors.
- Recognizing these rare presentations is crucial for accurate diagnosis and management of hyperparathyroidism.