[Inflammatory myofibroblastic tumor: Variable presentation of the same pathology]. / Tumor miofibroblástico inflamatorio: Presentación variable de una misma patología.

INTRODUCTION: The inflammatory myofibroblastic tumor is an infrequent benign neoplasm with unpredictable cli nical behavior. OBJECTIVES: to describe three clinical cases at the San Borja Arriarán Clinical Hospital between March 2014 and January 2018 and to carry out an updated review of the literature. Case 1: 14-year-old male adolescent, hospitalized due to abdominal pain, diagnosed with jejunojejunal intus susception secondary to an intestinal wall tumor. The histology was compatible with an inflamma tory myofibroblastic tumor. Case 2: 12-year-old female adolescent, hospitalized due to pneumonia and low-back pain under study associated with weight loss. A retroperitoneal mass was diagnosed involving the right psoas muscle, paravertebral muscles, vertebrae, right kidney, and ipsilateral dia phragm. A puncture biopsy was performed and the result was compatible with an inflammatory myofibroblastic tumor. Case 3: 11-year-old female pre-adolescent, hospitalized to study recurrent urinary tract infection. A bladder tumor was identified, and the biopsy showed compatibility with inflammatory myofibroblastic tumor. CONCLUSION: Due to the variable behavior of the inflammatory myofibroblastic tumor, its management will depend on the location, expression of the anaplastic lymphoma kinase (ALK), tumor behavior, and the resection possibility.

Tumor miofibroblástico inflamatorio: presentación variable de una misma patología / Inflammatory myofibroblastic tumor: variable presentation of the same pathology

INTRODUCCIÓN: El tumor miofibroblástico inflamatorio (TMI) es una neoplasia benigna infrecuente, de comportamiento clínico impredecible. OBJETIVOS: describir 3 casos de TMI diagnosticados entre marzo 2014 y enero 2018 en Hospital Clinico San Borja Arriaran, y realizar una revisión actualizada de la literatura. CASO 1: Adolescente de género masculino de 14 años de edad, hospitalizado por dolor abdominal, diagnosticado de invaginación yeyunoyeyunal secundaria a un tumor de pared intestinal. La histología fue compatible con un tumor miofibroblástico inflamatorio. CASO 2: Adolescente de género femenino, edad 12 años, hospitalizada por neumonía y dolor lumbar en estudio asociado a pérdida de peso. Se diagnosticó una masa retroperitoneal que comprometía el músculo psoas derecho, músculos paravertebrales, vértebras, riñón derecho y diafragma ipsilateral. Se efectuó biopsia por punción cuyo resultado fue compatible con un tumor miofibroblástico inflamatorio. CASO 3: Preadolescente de género femenino de 11 años de edad, hospitalizada para estudio de infección del tracto urinario a repetición. Se identificó un tumor vesical y la biopsia mostró ser compatible con tumor miofibroblástico inflamatorio. CONCLUSIÓN: Debido al comportamiento variable del tumor miofibroblástico inflamatorio, el manejo de este dependerá de la localización, la expresión del anaplasic like lymphoma (ALK), el comportamiento del tumor y la posibilidad de resección.

INTRODUCTION: The inflammatory myofibroblastic tumor is an infrequent benign neoplasm with unpredictable cli nical behavior. OBJECTIVES: to describe three clinical cases at the San Borja Arriarán Clinical Hospital between March 2014 and January 2018 and to carry out an updated review of the literature. CASE 1: 14-year-old male adolescent, hospitalized due to abdominal pain, diagnosed with jejunojejunal intus susception secondary to an intestinal wall tumor. The histology was compatible with an inflamma tory myofibroblastic tumor. CASE 2: 12-year-old female adolescent, hospitalized due to pneumonia and low-back pain under study associated with weight loss. A retroperitoneal mass was diagnosed involving the right psoas muscle, paravertebral muscles, vertebrae, right kidney, and ipsilateral dia phragm. A puncture biopsy was performed and the result was compatible with an inflammatory myofibroblastic tumor. CASE 3: 11-year-old female pre-adolescent, hospitalized to study recurrent urinary tract infection. A bladder tumor was identified, and the biopsy showed compatibility with inflammatory myofibroblastic tumor. CONCLUSION: Due to the variable behavior of the inflammatory myofibroblastic tumor, its management will depend on the location, expression of the anaplastic lymphoma kinase (ALK), tumor behavior, and the resection possibility.