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Large parathyroid functioning carcinoma (1,200 g) presenting as a substernal goiter.
A Avramides1, K Papamargaritis, A Antoniadis
1Department of Endocrinology, Hippokration Hospital, Thessaloniki, Greece.
Journal of Endocrinological Investigation
|January 1, 1992
Summary
A rare, large parathyroid carcinoma presenting as a substernal goiter was successfully treated. This case highlights the importance of considering parathyroid malignancy in unusual presentations of hyperparathyroidism.
Area of Science:
- Endocrinology
- Oncology
- Surgical Pathology
Background:
- Parathyroid carcinoma is a rare endocrine malignancy, accounting for 0.5-5% of primary hyperparathyroidism cases.
- Diagnosis is often delayed until metastatic disease is evident, as tumors are typically small and asymptomatic.
Observation:
- A 37-year-old male presented with a large (1,200g) substernal goiter, severe hypercalcemia, and hypertension.
- Imaging revealed a cystic and calcified mass in the anterior upper mediastinum.
- Histopathology confirmed a well-differentiated parathyroid adenocarcinoma with regional lymph node metastasis.
Findings:
- Surgical resection of the large parathyroid tumor and involved lymph node was performed.
- The patient experienced complete resolution of hypercalcemia and renal failure post-surgery.
- No evidence of distant metastases was observed at nearly 4-year follow-up.
Implications:
- This case demonstrates that parathyroid carcinoma can present atypically with large masses and mediastinal extension.
- Aggressive surgical management can lead to long-term remission even in advanced presentations.
- Early recognition and multidisciplinary care are crucial for optimizing outcomes in parathyroid cancer.