IJAR.2020.172
Type of Article: Original Research
Volume 8; Issue 3.1 (July 2020)
Page No.: 7604-7608
DOI: https://dx.doi.org/10.16965/ijar.2020.172
MORPHOLOGICAL STUDY OF SUPRATROCHLEAR FORAMEN IN ADULT DRY HUMERUS BONES
Mallikarjun M, Raveendra Patil GT, Solomon Krupanidhi U.
1 Professor and Head, Department of Anatomy, Vijayanagar institute of medical sciences (VIMS), Bellary, Karnataka, India.
*2 Associate professor, Department of Anatomy, Vijayanagar institute of medical sciences (VIMS), Bellary, Karnataka, India.
3 Professor, Department of Anatomy, Vijayanagar institute of medical sciences (VIMS), Bellary, Karnataka, India.
Corresponding Author: Dr. Raveendra Patil GT, Associate professor, Department of Anatomy, Vijayanagar institute of medical sciences (VIMS), Bellary, Karnataka, India.
Mobile: +919742666674 E-Mail: drravi2201@gmail.com
ABSTRACT
Background: A thin bony plate present between coronoid fossa and olecranon fossa of humerus bone sometimes perforated to form a foramen named as supratrochlear foramen (STF) or septal aperture. This was first described by Meckel in 1825. According to Hirsh (1927) thin plate of bone between coronoid & olecranon fossa is always present until the age of 7 years after which the bony septum occasionally becomes absorbed to form STF. It has been described in hyena, dog, cattle and other primates. STF in the distal end of the humerus is associated with narrow intramedullary canal (IMC). During radiological evaluations of the humerus, the presence of STF may result in erroneous interpretation as osteolytic lesion or cystic lesion. Previous studies on the Indian population have the varying incidences from 19.2% to 34.4%.
Aims and Objectives: The present study was done 1) to know the proportion of STF and 2) to know the various types (shapes) of supratrochlear foramen in adult humerus bones.
Material and Methods: The study was done on 200 (100 Right &100 Left) adult dry humerus bones of both sexes collected over a period of 3 years from the department of Anatomy, Vijayanagar institute of medical sciences (VIMS), Bellary, Karnataka. Study of various types (shapes) of supratrochlear foramen was done by naked eye observation. Opacity and Translucency of septum were observed by placing its lower end against X- ray lobby. The data obtained was tabulated and statistically analysed.
Results: STF was observed in 64(32%) humeri and was classified into various types. Out of 64 humeri having STF the commonest shape was oval 28(43.75%), followed by rectangular 12(18.75%), triangular 8(12.5%), sieve like 6(9.35%), round 5(7.81%) and reniform 3(4.68%). We found 2(3.12%) left humeri with multiple sieve like foramen in coronoid olecranon aperature and also in radial fossa. Opaque septum was observed in 79 (39.5%) humeri and translucent septum in 57 (28.5%) humeri.
Conclusion: Supratrochlear foramen is a common anatomical variation in lower end of humerus bone with significant surgical implication. Proper identification of this anomaly on preoperative radiographs should alert the surgeon while insertion of intramedullary nailing for treatment of supracondylar fractures of humerus. The presence of supratrochlear foramen is also important for radiologists and orthopedicians for proper interpretation of X-rays, since they are radiolucent and are easily mistaken for osteolytic and cystic lesions.
Key words: Supratrochlear foramen, Supracondylar fracture, Intramedullary nailing Osteolytic lesion, Anthropology.
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