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Vasculitic syndromes are a group of disorders characterized by inflammation of the blood vessels. They include polyarteritis nodosa (PAN), Churg-Strauss syndrome (CS), and Wegener granulomatosis (WG) that differ on type, size, and location of the involved vessels. We report a rare case of granulomatous vasculitis leading to ureteral stenosis in the absence of other systemic manifestations of the disease. The patient was a 56-year-old woman who began to complain of left lumbar pain, nocturia, and dysuria. Computed tomography scan demonstrated a large abdominal mass with ureteral compression. A tissue specimen obtained by laparotomy revealed the presence of a chronic inflammatory process with fibrosis, granulomatous reaction, extravascular eosinophilia, and prominent vasculitis. She was put on corticosteroids and azathioprine with a decrease of the tumoral mass. This incompletely classified vasculitis was an unexpected cause of the abdominal mass.

BACKGROUND: The combination of both physiological knowledge of a variety of sistems and the clinical findings it is of extreme relevance to the medical student learning process. The proposal of a simulated enviroment, with clinical data collection and regular physical examination, is crucial to this process. The Semiological bases of Escola Bahiana de Medicina e Saúde Pública module, used by the OSCE’s 4th semester medical students, capacitate them for such means. SUMMARY OF WORK: The evaluation logistic was divided into two segments: the first one was made through a theorical exam with close questioning, exhibiting images and videos, but also containing an open-ended question requesting a construction of a fictional clinical case; in the second one it was applied a practical exam segmented by different fields of medical knowledge (neurological, cardiovascular and respiratory/abdomen), with the evaluation of 120 students and followed by the teacher’s feedbacks at the conclusion of each field exam. SUMMARY OF RESULTS: The experience was important, however, it is notable the need for a complex management and understanding of the evaluational process. Discussion between students and teachers happened in behalf of the development of such proposal. CONCLUSIONS: The application of theorical exams throughout the semester combined with a practical exam (the OSCE) at the conclusion of the curricular component Bases Semiológicas had significant weight to the whole process.