Pagetoid Spread in Basal Cell Carcinoma: Potential for Misdiagnosis.

Basal cell carcinomas are one of the most common cutaneous carcinomas and show classical histologic features of basaloid nests with peripheral palisading. Pagetoid and intraepidermal spread has not been described in basal cell carcinoma to the best of our knowledge. We report 5 cases of basal cell carcinoma with classic histologic patterns and overlying basaloid nests and single intraepidermal tumor cells.

A case of histiocytoid angiosarcoma mimicking Rosai-Dorfman disease histopathologically.

There are very few documented cases of histiocytoid angiosarcoma in the literature. We report a rare case of histiocytoid angiosarcoma demonstrating emperipolesis, a histopathologic finding that mimics Rosai-Dorfman disease (RDD). A 77-year-old male presented with a subcutaneous nodule on his left forehead.

Neuropathology of COVID-19 (neuro-COVID): clinicopathological update.

Coronavirus disease 2019 (COVID-19) is emerging as the greatest public health crisis in the early 21century. Its causative agent, Severe Acute Respiratory Syndrome coronavirus 2 (SARS-CoV-2), is an enveloped single stranded positive-sense ribonucleic acid virus that enters cells via the angiotensin converting enzyme 2 receptor or several other receptors. While COVID-19 primarily affects the respiratory system, other organs including the brain can be involved.