Colon Tumor Tattooing-Derived Ink-Laden Macrophages in Peritoneal Ascitic Fluid

Abstract

Introduction: Macrophages containing exogenous pigments are commonly encountered in cytological specimens.

Case presentation: We present a case of tumor tattooing as an infrequent exogenous source of peritoneal fluid macrophagic pigment in a 76-year-old female.

Discussion and conclusion: Tattooing-derived ink can be a source of macrophagic pigment and should not be confused with other endogenous or exogenous pigments. The anatomical location and past medical history of the patient can aid in the diagnosis.

Keywords: Ink-derived pigment; Macrophages; Tumor tattooing.