Well-differentiated (Marschalko-type) plasmacytoma resembling thyroid follicular structures

Dear Editor: Plasma cell neoplasms may display diverse cytoarchitectural variations, including a diffuse, nested, paragangliomatous, and angiomatoid arrangements [1]. We present herein a case of a well-differentiated (Marschalko-type) plasmacytoma in which neoplastic plasma cells arranged in a pseudofollicular configuration resemble thyroid follicles filled with ‘colloid-like’ material. © Journal of Hematopathology