Pseudotumor inflamatorio hepático, una entidad de difícil diagnóstico / Inflammatory pseudotumor of the liver: a condition hard to diagnose

RESUMEN El pseudotumor inflamatorio hepático es una lesión muy infrecuente, sin una etiología ni patogenia claras. Su diagnóstico preoperatorio no es habitual pero, en caso de realizarse, puede evitar la cirugía. Presentamos el caso de un paciente joven, con antecedente de lupus cutáneo que, tras debutar con una pancreatitis aguda, presenta episodios de colangitis y cuyos hallazgos radiológicos no permiten descartar la presencia de un colangiocarcinoma, por lo que se realiza hepatectomía izquierda, siendo el diagnóstico histológico final de pseudotumor inflamatorio hepático.

ABSTRACT Inflammatory pseudotumors of the liver are rare and lack clear etiology and pathogenesis. The preoperative diagnosis is seldom made but it avoids unnecessary surgery. We report the case of a young male patient with a history of cutaneous lupus and episodes cholangitis after an acute pancreatitis. As the imaging tests could not rule out cholangiocarcinoma, a left liver resection was performed, and the final histologic diagnosis was inflammatory pseudotumor of the liver.

Differential Diagnoses of Diseases Involving the Extrinsic Ocular Musculature ­ A Pictorial Essay

Introduction There are some inflammatory, infectious, and neoplastic diseases affecting the extrinsic orbital musculature (EOM) that present with pain, decreased visual acuity, and proptosis. Imaging is fundamental to the differential diagnoses of these diseases with similar clinical presentations. The present case series report has as main objective to illustrate and discuss the main pathologies that affect the orbit. Material and Methods The present series of cases discusses the main pathologies that can affect the extraocular musculature that can be characterized by computed tomography (CT) or magnetic resonance imaging (MRI) using cases from our institution. Results and Discussion The present study compiled several cases of ophthalmopathy from our institution to illustrate and address some of these pathologies, such as orbital lymphoma, Grave disease, metastases, periorbital cellulitis, and idiopathic orbital inflammatory syndrome. The diseases are discussed according to the presentation of clinical cases with emphasis on the main imaging findings of each pathology. Conclusion Computed tomography and MRI can help in the diagnosis and follow-up of the diseases that affect the EOM. We must be conversant with the main characteristics of the pathologies presented in the present case series report, since such findings together with clinical data can confirm the diagnosis of these diseases or at least help to narrow the differential diagnoses.

Tumor miofibroblástico inflamatorio del colon / Inflammatory Myofibroblastic Tumor of the Colon

RESUMEN Introducción: Los tumores miofibroblásticos son tumores benignos de origen mesenquimal, de etiología incierta, y frecuente en niños y jóvenes. Objetivo: Describir un nuevo caso de tumor miofibroblástico abdominal. Caso clínico: Se presenta una paciente de 20 años con antecedentes de salud con dolor en abdomen derecho, se realiza tomografía de abdomen contrastada que informa una masa hiperdensa no homogénea en flanco derecho. Se realiza resección quirúrgica del tumor y el estudio anatomopatológico informa un tumor miofibroblástico inflamatorio. Su pronóstico es favorable porque es una entidad benigna y no metastiza. Conclusiones: Los tumores miofibroblásticos de colon son infrecuentes, benignos, que al diagnosticarlos deben resecarse ampliamente para evitar la recidiva(AU)

ABSTRACT Introduction: Myofibroblastic tumors are benign tumors of mesenchymal origin, of uncertain etiology, and frequent in children and young people. Objective: To describe a new case of abdominal myofibroblastic tumor. Clinical case: The case is presented of a 20-year-old female patient with a health history and pain in the right abdomen. Contrasted abdominal tomography is performed, which shows an inhomogeneous hyperdense mass in the right flank. Surgical resection of the tumor was performed. The pathological study reported an inflammatory myofibroblastic tumor. Its prognosis is favorable because it is a benign entity that does not metastasize. Conclusions: Colon myofibroblastic tumors are infrequent, benign, and when diagnosed, they must be widely removed to avoid recurrence(AU)

Radiologic Findings of Renal Inflammatory Pseudotumor: A Case Report

Renal inflammatory pseudotumor is a very rare benign condition of unknown etiology characterized by proliferative myofibroblasts, fibroblasts, histiocytes, and plasma cells. In the case we report, the lesion appeared on contrast-enhanced power Doppler US images as a well-defined hypoechoic mass with intratumoral vascularity, and on CT as a low-attenuated mass. Differentiation from malignant renal neoplasms was not possible.