STUDY OF SUPRATROCHLEAR FORAMEN OF HUMERUS Savitha V * 1 , K R Dakshayani 2 . *1  Post Graduate, Department of Anatomy, Mysore Medical College & Research Institute, Mysore. Karnataka, India. 2 Professor and Head, Department of Anatomy, Mysore Medical College & Research Institute, Mysore, Karnataka, India. Correspondence   Address:   Dr.   Savitha   V,   Postgraduate,   Department   Of   Anatomy,   Mysore   Medical   College   &   Research   Institute,   Mysore.   Karnataka,   India. Mobile No: +917795540103 E-Mail:  doctorsavithav@gmail.com ABSTRACT Background:   A   thin   bony   plate   between   coronoid   fossa   and   olecranon   fossa   of   humerus   sometimes   perforated   to   form   a   foramen   named   as   supratrochlear foramen   (STF)   or   septal   aperture.   It   was   present   between   two   epicondyles,   also   called   as   intercodylar   foramen.   It   was   formed   after   the   age   of   6   years following   incomplete   ossification,   intralamellar   space   enlargement   or   gradual   septal   absorption.   Individuals   with   STF   may   be   able   to   hyperextend   the   elbow joint.   STF   is   an   important   single   factor   which   determines   the   route   and   mode   of   insertion   of   intramedullary   nail   during   the   management   of   supratrochlear fractures.   The   presence   of   STF   may   also   result   in   erroneous   interpretation   of   radiographs.   STF   is   of   great   importance   to   anthropologists   while   claiming   it   as one of the points in satisfying relationship between human and lower animals. Materials   and   Methods :   the   present   study   was   conducted   on   50   dried   humeri   (22   right   side,   28   left   side)   of   unknown   sex,   obtained   from   department   of anatomy, mmc & ri, mysore. The side of bone, presence and shapes of STF were noted. Shape of STF was recorded as oval, round, triangular and sieve like. Results:    out   of   50   humeri      studied   14   (28%)   showed   STF.   Out   of   which   10   (35.71%)   on   left   side   &   4   (18.18%)   on   right   side.   Out   of   which   shape   of   STF   was oval in 4 (28%), round in 5 (35.71%), triangular in 2(7.14%) and sieve like in 3 (21.42%). Conclusion :   the   anatomical   knowledge   of   STF   is   beneficial   for   anthropologists   helps   while   claiming   it   as   one   of   the   points   in   satisfying   relationship   between humans   &   lower   animals.   In   supracondylar   fractures   of   humerus,   the   surgeon   must   keep   in   mind   that      in   humeri   with   STF   it   is   better   to   perform   an antegrade   medullary   nailing   than   a   retrograde   one;   as   there   is   higher   chance   of   a   secondary   fracture   due   to   extreme   narrowness   of   the   canal   at   the   distal portion of humerus.STF appears radiolucent in radiographs and this may be misinterpreted as osteolytic or cystic lesion during radiological examination. KEY WORDS: Supratrochlear Foramen, Anthropology, Intramedullary Nailing, Osteolytic  Lesion. References 1 . Kate B. R. And Dubey P. N. A Note On The Septal Apertures In The Humerus Of Central Humerus. E. Anthropol. 1970;33:105-110. 2 . Paraskevas   Gk,   Papaziogas   B,   Tzaveas   A,   Giaglis   G,   Kitsoulis   P,   Natsis   K.   The      Supratrochlear   Foramen   Of   The   Humerus   And   Its   Relation   To   The Medullary Canal: A Potential Surgical Application. Med Sci Monit: 2010;16(4):Br119-123. 3 . Hirsh,    S.I.    Cited    In    Morton,    S.    H.,    &    Crysler,    W.    E.,    Osteochondritis    Dissecans    Of    The    Supratrochlear    Septum.    Journal    Of    Bone    Joint    Surgery 1927;27(A):12-24. 4 . Singhal S, Rao V. Supratrochlear Foramen Of The Humerus. Anat Sci Int. 2007;82(2):105-107. 5 . Nizami   Duran,   Senem   Erdogmus,   Munevver   Guler,   Serpil   Eroglu.   The   Importance   Of   The   Supratrochlear   Foramen   Of   The   Humerus   In   Humans:   An Anatomical Study. Med Sci Monit: 2014;20:2643-2650. 6 . Venkatesh   Gobi   Veerappan,   Balajithotakura,   Aruna   S,   Kannan.G,   Narayanan.G,   Balaji.K.   Study   Of   Intercondsylar   Foramen   Of   Humerus-   Clinical   And Radiological Aspect. Iosr Journal Of Nursing And Health Science:2013;4(2):24-27. 7 . Jing   L,   Qinghua   Mao,   Wenyuan   L,   Xiaoyan   L.   An   Anatomical   Study   Of   The   Supratrochlear   Foramen   Of   The   Jining   Population.   Turk   J   Med   Sci.   2015;1369- 1373. 8 . Surekha   Dilip   Jadhav   And   Balbhim   Ramchandra   Zambare   Supra-Trochlear   Foramen   And   Its   Clinical   Significance.   Asian   Journal   Of   Biomedical   And Pharmaceutical Sciences, 2015;5(46),13-15. 9 . Arunkumar    K    R,    Manoranjitham    R,    Raviraj    K,    Dhanalakshmi    V4 .     Morphological    Study    Of    Supratrochlear    Foramen    Of    Humerus    And    Its    Clinical Implications. International Journal Of Anatomy And Research. 2015;3(3):1321-25. 1 0 . Asha.     Krishnamurthy,     Anil     Reddy.     Yelicharla,     Anitha.     Takkalapalli,     Vinay.     Munishamappa,     Bhagyalakshmi.     Bovinndala,     Chandramohan.     M. Supratrochlear Foramen Of Humerus – A Morphometric Study. Int J Biol Med Res: 2011;2(3):829-831. 1 1 . Jaswinder   Kaur,   Zorasingh.   Supratrochlear   Foramen   Of   Humerus   -   A   Morphometric   Study.   Indian   Journal   Of   Basic   &   Applied   Medical   Researc:   2013; 7(2): 651–54. 1 2 . Oyedun   Oladayo   Sunday   ,   Ogunlade   Samuel   Olusegun,   Bolaji   Modupeola   Oluwabunmi.   The   Supratrochlear   Foramen   Of   The   Humerus:   Implications   For Intramedullary Nailing In Distal Humerus. Journal Of Biology, Agriculture And Healthcare:2014;7(4):136-139. 1 3 . Soubhagya   R   Nayak   ,   Srijit   Das   S,   Krishnamurthy   A,   Prabhu   Lv,   Potu   Bk.                                          Supratrochlear   Foramen   Of   The   Humerus:   Ananatomico-Radiological Study With Clinical  Implications; Upsala Journal Of Medical Sciences. 2009; 114(2): 90-94. 1 4 . Dhanalakshmi   V,   Santhi   B,   Manoharan   C,   Flora   Juanita   E.   Study   Of   Supratrochlear   Foramen   Of   Humerus:   International   Journal   Of   Anatomy,   Physiology And Biochemistry. 2015;2(9):4-7. 1 5 . Hima   Bindu   A,   Narasinga   Rao   B.   Supratrochlear   Foramen-A   Phylogenıc   Remnant.   International   Journal   Of   Basic   And   Applied   Medical   Sciences:   2013; 3(2): 130–32. 1 6 . Dr.   Varalakshmi   K.L,   Dr.   Sweekrishna   Shetty,   Dr.   Qudsia   Sulthana.   Study   Of   Supratrochlear   Foramen   Of   Humerus   And   Its   Clinical   Importance.   Iosr Journal Of Dental And Medical Sciences: 2014;7(13):68-70. 17. Patel Sv, Sutaria Lk, Nayak Tv, Kanjiya Dp, Patel Bm, Aterkar Sh. Morphometric Study Of Supratrochlear Foramen Of Humerus. International Journal Of Biomedical And Advance Research. 2013;04(2):89-92.