A Rare Case of Myoid Hamartoma Masquerading as Invasive Breast Carcinoma

Breast Myoid Hamartoma (MH) is a rare type of neoplasm with a poorly understood pathogenesis. Very few literatures have reported such disease with an unclear prognosis and malignant potentiality. Some isolated studies have shown that breast Myoid Hamartoma (MH) may be genetically related to other types of tumours with the involvement of HMGA2 gene. We reported a case of a 64-year-old post-menopausal lady with an underlying chronic idiopathic axonal polyneuropathy (CIAP) that was referred to our centre for a suspected right breast tumour. Clinical and imaging proved the disease to be malignant, however, core biopsy results showed otherwise. Ultrasound of the right breast showed a solid mass with a hypoechoic heterogeneous echotexture and posterior shadowing. A Mammogram highlighted a dense lesion in the right breast with radiolucent halo and macrocalcification. It was reported as BIRADS 4 category. Managing breast Myoid Hamartoma (MH) is proved to be of great challenge to clinicians as meticulous clinical acumen is needed to strategize a proper plan and management, most importantly, not to overlook the disease as the malignant transformation has been reported before.