Abstract :
Pilomatricoma is a benign, nodular, solitary, painless, tumour, extending from lower dermis to subcutaneous fatty tissue. Present tumour developed as a small nodule in the skin of left upper arm. It measured 1.5×1×1cm. It was bony hard tissue covered with skin. Clinically, the patient may present as nodular pricking pain. Sections were taken both from bony and soft tissues. Later, nodule was excised. Microscopically, the tumour showed sheets of large number of tumour cells with basophilic cytoplasm and anucleate 'ghost' or 'shadow' cells. Bony trabeculae with osteoblastic rimming were seen at few places. Adjacent stroma showed fibrosis. Few foci of calcification were seen in sheets of tumour cells. Small number of inflammatory cells and occasional giant cells were also seen. Lesion was finally diagnosed as pilomatricoma with osteoid metaplasia.
Keyword :
Anucleate ghost cells, Calcification osteoid tissue, Benign neoplasm.