Papillary squamous cell carcinoma has been a loosely defined neoplasm, more often considered a verrucal type of malignancy. It nonetheless is a distinct clinicopathologic entity, separate from ...

The concave zone of papillary calculi can contain a range of calcified lesions, from little HAP residues to typical well-developed HAP plaques, also known as Randall's plaques. The morphology of ...