1084emorrhagic disease (HD) of the newborn caused by vitamin K deficiency has been recognized as a serious cause of morbidity and mortality. It is classified into three groups: early, classic and late HD. Early HD is seen within 24 hours of birth in infants whose mothers have been on antiepileptic or antituberculosis therapy during pregnancy. Classic HD occurs between the second and fifth days of life, with most of the cases being idiopathic. Late HD is characterized by hemorrhage in infants aged 1 week to 6 months due to severe vitamin K deficiency, but can occur anytime in the first year, occurring almost exclusively in breastfed infants. [1][2][3] A Case of Late Hemorrhagic Disease Operated Due to the Appearance of a Cerebral Mass A AB BS ST TR RA AC CT T In trac ra ni al he morr ha ge du e to la te he morr ha gic di se a se (HD) ca u sed by vi ta min K de fi ci ency has be en re cog ni zed as a se ri o us ca u se of mor bi dity and mor ta lity. La te HD most commonly ma ni fests as in trac ra ni al he morr ha ge. Ho we ver, radiological image of the bleeding as a wellcircumscribed mass mimicking a tumor is unusual. We re port a 5-month-old girl with in tra ce reb ral he morr ha ge du e to la te HD and pre vi o usly di ag no sed as ce reb ral mass. The in tra ce reb ral he morrha ge had an ima ge of well-cir cums cri bed mass and the re fo re tho ught to be a ce reb ral mass at the beginning. Re vi e wing the li te ra tu re, only one ca se of in tra ce reb ral he morr ha ge with a well-circums cri bed mass ima ge was fo und si mi lar to our ca se. La te HD sho uld al ways be kept in mind in in fants who had be en gi ven wi de spec trum an ti bi o tics, had pro lon ged gas tro en te ri tis and nut ri ti onal de fi ci ency, with an ima ge of in trac ra ni al mass.K Ke ey y W Wo or rd ds s: : He morr ha gic di se a se, in tra ce reb ral he morr ha ge, mass spec tro metry Ö ÖZ ZE ET T K vi ta mi ni ek sik li ği nin ne den ol du ğu geç he mo ra jik has ta lı ğa bağ lı ge li şen in trak ra ni yal kana ma, cid di mor ta li te ve mor bi di te ne de ni ola rak ta nım lan mak ta dır. İntrak ra ni yal ka na ma geç hemo ra jik has ta lı ğın sık gö rü len bir bul gu su dur. An cak, in trak ra ni yal ka na ma la rın düz gün sı nır lı kit le ye ben zer bir gö rü nüm ver me si bek le nen bir bul gu de ğil dir. Çalışmamızda, se reb ral kit le gö -rü nü mü ne de niy le ame li yat edi len geç he mo ra jik has ta lı ğa bağ lı in trak ra ni yal ka na ma tes pit edilen 5 ay lık kız ço cu ğu nu sun duk. Ol gu muz da ka na ma düz gün sı nır lı kit le gö rü nü mü ver mek tey di. Li te ra tür in ce len di ğin de düz gün sı nır lı kit le gö rün tü sü ve ren in trak ra ni yal ka na ma ya bir ol gu da rast lan dı. Ge niş spek trum lu an ti bi yo tik kul la nan, uza mış is ha li ve bes len me ye ter siz li ği olan süt ço cu ğun da düz gün sı nır lı kit le gö rün tü sü ve ren in trak ra ni yal ka na ma lar da geç he mo ra jik has ta lık mut la ka dü şü nül me li dir.A An na ah h t ta ar r K Ke e l li i m me e l le er r: : He mo ra jik has ...