ABSTRACT
Pseudomelanosis duodeni is a very rare appearance of the duodenal mucosa, characterized by the presence of a dark pigment (iron oxide) seen in the surface of the villi, evident by endoscopy. It can be associated with pathologies such as arterial hypertension, chronic heart failure, chronic kidney failure, gastrointestinal bleeding, and consumption of different drugs. We describe the case of a 68-year-old male patient, with chronic renal insufficiency, hemodialysis and intravenous iron treatment.
La Pseudomelanosis duodeni es una entidad muy poco frecuente de la mucosa duodenal que se caracteriza por la presencia de un pigmento oscuro de las vellosidades (oxido de hierro) que es evidente mediante endoscopía y puede estar asociado a patologías como hipertensión arterial, insuficiencia cardíaca crónica, insuficiencia renal crónica, hemorragia gastrointestinal y consumo de diferentes fármacos. Describimos el caso de un paciente masculino de 68 años, con antecedentes de insuficiencia renal crónica, en hemodiálisis y uso de hierro intravenoso.
Subject(s)
Humans , Male , Aged , Duodenal Diseases/pathology , Duodenum/pathology , Melanosis/pathology , Duodenal Diseases/diagnostic imaging , Duodenum/diagnostic imaging , Endoscopy/methods , Melanosis/diagnostic imagingABSTRACT
Abstract Melanonychia is the change in the coloration of the nail plate resulting from the deposition of melanin. Among its causes are melanocytic hyperplasia, melanocytic activation and nail melanoma. Subungual follicular inclusions are histological findings of unknown etiology, possibly related to trauma. We present three cases of melanonychia of different etiologies with subungual follicular inclusions, an association that has not been well described and with an indefinite pathogenesis.