. they can be either pedunculated or sessile and are more common in the extremities .
we present a case of 18 year female , who came with a swelling in right groin since 2 years which was diagnosed to be osteochondroma on x - ray and magnetic resonance imaging .
excision biopsy was done as the patient wanted it to be removed for cosmetic purpose and confirmed it to be non - malignant osteochondroma .
thus osteochondroma of the pelvis should be kept in mind as a differential diagnosis when evaluating mass in pelvis .
. they can be either pedunculated or sessile and are more common in the extremities , i.e. distal femur , proximal tibia and proximal humerus in decreasing order .
indications for excision are cosmetic deformity , pressure symptoms on neuro - vascular bundle or malignant transformation to chondrosarcoma which is rare .  
osteochondroma of the pubic ramus is rare entity and the actual incidence is not known .
it can present as a solitary lesion or as a part of multiple hereditary exostosis .
pelvic osteochondromas can present as compressive neuropathy or compressive symptoms on urethra , bladder or other vital structures and so on . on the contrary a pubic bone mass may need to be removed in young females which might be prominent at labia for cosmetic reasons as in our case .
an 18 year female came to the out - patient department with complaints of swelling in right groin since 5 years which was insidious in onset , small in size initially but grew over last 5 years and was noticeable to the patient .
, there was a bony hard swelling 3  5 cms in size in the groin at the pubic tubercle of the right side .
plain x - ray s of pelvis ap , inlet and outlet view ( fig.1 to 3 ) and magnetic resonance imaging ( fig 4 & 5 ) showed bony growth of 543746 mm in size in transverse , craniocaudal and anteroposterior dimension which was arising from right superior pubic ramus and was extrapelvic in situation with a cartilage cap of 4 mm .
6 ) was taken and as the soft tissue was retracted cartilage cap of the osteochondroma was seen ( fig .
manual palpation was done and one more piece was found which was then excised ( fig . 9 ) .
inguinal ligament was closed in layers maintaining the external iliac ring with continuous sutures to prevent future inguinal hernia ( fig .
osteochondromas are benign tumors which have an unknown etiology . it is considered as a developmental physeal abnormality rather than a primary bone neoplasm .
a few theories have been suggested which include virchow theory , muller theory , keith theory , and a few more .  
the most common sites are metaphysis of long bones like distal femur , proximal tibia and proximal humerus .
osteochondromas can also be found as a part of multiple hereditary exostosis which is thought to be associated with ext1 and ext 2 gene .  
osteochondromas are as such an incidental finding in patients and only a few are symptomatic .
it is usually present in growing age and the growth of the mass stops after skeletal maturity .
various studies have mentioned about the size of cartilage cap as a predictor for malignancy with a cartilage cap of more than 2 cm after skeletal maturity indicative of malignant transformation .
pre operative investigations and planning in patients presenting with a bony neoplasm must be done .
pre - operative x - rays and mri were done for our patient to see the extent and measure the cartilage cap of the osteochondroma .
pelvic osteochondroma involving ilium has been reported in literature which caused nerve root compression and had to be removed .  
osteochondroma of the pubic symphisis has been reported which was removed due to bladder outlet obstruction .  
thus with a thorough search in literature we concluded that it is a rare entity and it was diagnosed due to the compressive symptoms caused by it . here in our case
the swelling near the private part was the cause for the patient to seek medical help .
there were no compressive symptoms either on vessels or on urinary tract which was confirmed by arterial doppler and micturating cysto - urethrography .
a similar case was reported by qaisrani gh   and associates which was also present on superior pubic ramus and was removed for cosmetic deformity .
complete en - bloc removal of the mass was done in our case for cosmetic reasons and she is being followed up regularly . even after 1 year there has not been any recurrence of the lesion .
benign osteochondromas are usually incidental findings and are removed most commonly for cosmetic purposes with a very low incidence of recurrence if removed after skeletal maturity .
also pelvic osteochondromas are rare entity but it has to be kept in mind for any bony mass when looking for differentials .
pelvic osteochondromas are rare entity but it has to be kept in mind for any bony mass when looking for differentials .
 introduction : osteochondroma are benign neoplasms which arise from small cartilage nodules within the periosteum . 
 they can be either pedunculated or sessile and are more common in the extremities . 
 they rarely develop in bones like scapula , feet , hands and pelvis . 
 management of the lesion is by en - bloc excision.case report : we present a case of 18 year female , who came with a swelling in right groin since 2 years which was diagnosed to be osteochondroma on x - ray and magnetic resonance imaging . 
 excision biopsy was done as the patient wanted it to be removed for cosmetic purpose and confirmed it to be non - malignant osteochondroma . 
 there has been no recurrence even after 1 year of follow up.conclusion:thus osteochondroma of the pelvis should be kept in mind as a differential diagnosis when evaluating mass in pelvis . 
 also these have to be removed when they pose cosmetic problems . 
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Case Report:
Conclusion:
Introduction
Case report
Discussion
Conclusion