Challenges of Differential Diagnosis Between Primary Hyperparathyroidism and Bone Metastases of Breast Cancer

Maksym Gorobeiko; Andrii Dinets; Denys Pominchuk; Karim Abdalla; Yuriy Prylutskyy; Viktoria Hoperia

doi:10.1177/11795476221125136

Challenges of Differential Diagnosis Between Primary Hyperparathyroidism and Bone Metastases of Breast Cancer

Clin Med Insights Case Rep. 2022 Sep 20:15:11795476221125136. doi: 10.1177/11795476221125136. eCollection 2022.

Authors

Maksym Gorobeiko^{1

2}, Andrii Dinets^{1

2}, Denys Pominchuk², Karim Abdalla², Yuriy Prylutskyy³, Viktoria Hoperia⁴

Affiliations

¹ Department of Surgery, Institute of Biology and Medicine, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine.
² Department of Surgery, Verum Expert Clinic, Kyiv, Ukraine.
³ Department of Biophysics and Medical Informatics, Institute of Biology and Medicine, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine.
⁴ Department of Fundamental Medicine, Institute of Biology and Medicine, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine.

Abstract

Breast cancer might be complicated by distant metastases accompanied by hypercalcemia, but hyperparathyroidism is not commonly considered in the differential diagnosis. We present a case of 38 years old female patient who was diagnosed with ductal breast carcinoma. Eight months after the initial diagnosis the patient was diagnosed with distant bone metastases. However, this diagnosis was reconsidered at follow up, because we identified elevation of PTH 137.2 pg/ml, Ca²⁺ 1.19 mmol/l, albumin corrected calcium 2.42 mmol/l, 25(OH)D 39.4 nmol/l, indicating hyperparathyroidism. Scintigraphy with 99mTC-sestamibi confirmed parathyroid adenoma. Postoperative histopathology confirmed 1.2 g chief-cell PTA. Two months after the operation both PTH and Ca²⁺ levels were within the normal ranges. This study emphasizes the importance of considering possible hyperparathyroidism in patients with breast cancer and hypercalcemia. Routine evaluation of PTH is considered as a reasonable test in patients with breast cancer accompanied by bone lesions.

Keywords: Diagnosis; bone demineralization; bone diseases; breast; carcinoma; differential; ductal; endocrine; hyperparathyroidism; pathologic; primary.

Publication types

Case Reports