Birt-Hogg-Dubé (BHD) is a rare syndrome of inherited renal cell carcinomas, characterised by cutaneous lesions and pulmonary cysts and pneumothorax in a vast majority of the patients. Awareness of this syndrome is important in order to refer patients for genetic counselling and personalised follow-up as soon as possible. We describe a case of a 30-year-old female referred to our institution due to incidental discovery of solid bilateral renal masses. Renal biopsies were consistent with chromophobe tumour, and bilateral nephrectomy was performed. Gross examination revealed deformed kidneys with 28 brown and solid lesions, size variable between 0.1 and 6 cm, histologically corresponding to renal cell carcinomas, chromophobe type. Genetic test was required that showed a c.573delGAinsT frameshift mutation in heterozigosity at the folliculin gene, consistent with BHD diagnosis.
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