PJR October-December 2016; 26(4): 275-280 OBJECTIVE: To as s e s s th e us e ful ne s s of de m ons trating fl ow void s ign on conve ntional M RI s e q ue nce s in dif fe re ntiating ute rine l e iom yom as from oth e r s ol id pe l vic m as s e s w h ich h ave s am e s ignal inte ns ity to m yom e trium. METHODS: Th is de s criptive s tudy w as conducte d in th e De partm e nt of Radiol ogy, Aga K h an Unive rs ity H os pital , K arach i from April 2014 to M ay 2015. It com pris e d fe m al e

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... patie nts of al l age s w h o h ad m agne tic re s onance im aging (M RI) pe l vis w ith diagnos is of a s ol id appe aring pe l vic m as s fol l ow e d by s urge ry and h is topath ol ogy at our ins titution. Fl ow void s ign w as de s cribe d as de m ons tration of fe e ding ve s s e l s appe aring as fl ow void be tw e e n th e ute rine l e iom yom as and ute rus. H is topath ol ogy w as tak e n as gol d s tandard. RESULTS: Fl ow void s ign w as obs e rve d in 66 out of 73 pe l vic m as s e s on M RI. O ut of 66 patie nt s 65 w e re diagnos e d h is tol ogical l y as l e iom yom as. W h e n th e fl ow void s ign w as s e e n on M RI and s ubs e q ue nt h is topath ol ogy confirm e d th e diagnos is of l e iom yom a. In al l s uch cas e s th e s e ns itivity, s pe cificity, pos itive and ne gative pre dictive val ue s , and diagnos tic accuracy of th e fl ow void s ign for diagnos ing l e iom yom as w e re cal cul ate d as 9 7% (65/67), 83% (65/66), 9 8% (65/66), 71% (65/67) and 9 5% (70/73), re s pe ctive l y. CONCLUSION: Fl ow void s ign is an im portant ancil l ary s ign for th e radiol ogical diagnos is of l e iom yom a on M RI and us e ful in diffe re ntiating l e iom yom a from focal ade nom yos is or ovarian tum ors (fibrom as) w h ich s h ow s ignal inte ns ity s im il ar to ute rine l e iom yom as. Key Words: Le iom yom as , M agne tic Re s onance Im aging, Fl ow void s ign, Pe l vic m as s ABSTRACT De partm e nt of Radiol ogy, Aga K h an Unive rs it y H os pital , K arach i, Pak is tan.