Parathyroid Carcinoma: A Rare Endocrine Malignancy

Area of Science:

• Endocrinology
• Oncology
• Pathology

Background:

• Parathyroid carcinoma (PC) is an exceptionally rare endocrine malignancy.
• PC incidence has shown a reported increase in recent years.
• The condition often presents indolently with nonspecific hypercalcemia symptoms.

Observation:

• Case 1: A 30-year-old male presented with hypercalcemia and elevated parathyroid hormone (PTH), diagnosed with PC via surgery.
• Case 2: A 45-year-old male with hypothyroidism showed mild hypercalcemia and elevated PTH, diagnosed with PC post-surgery.
• Case 3: A 38-year-old male experienced severe hypercalcemia, bone pain, and a cervical mass, confirmed as PC, later developing metastases.

Findings:

• Most parathyroid carcinomas are slow-growing tumors.
• Distinguishing benign from malignant parathyroid lesions can be difficult due to a lack of specific clinical features.
• Some PCs are associated with hereditary syndromes.

Implications:

• Surgical resection remains the primary treatment modality for parathyroid carcinoma.
• The rarity of PC limits the availability of high-quality clinical data.
• Further research is needed to improve diagnostic accuracy and treatment strategies for PC.