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CASE REPORT Table of Contents   
Year : 2001  |  Volume : 11  |  Issue : 4  |  Page : 203-204
Osteolipoma


Department of Radiodiagnosis of Imaging, Kasturba Medical College, Manipal, India

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Keywords: Osteolipoma, parapharyngeal space, neoplasm

How to cite this article:
Shetty D S, Lakhkar B N, Abubacker S. Osteolipoma. Indian J Radiol Imaging 2001;11:203-4

How to cite this URL:
Shetty D S, Lakhkar B N, Abubacker S. Osteolipoma. Indian J Radiol Imaging [serial online] 2001 [cited 2019 Nov 22];11:203-4. Available from: http://www.ijri.org/text.asp?2001/11/4/203/28402
A seventeen-year-old girl presented with difficulty in swallowing. She also complained of decreased hearing and tinnitus in the right ear. General examination did not reveal any abnormality. Blood parameters and peripheral smear were normal. On local examination, there was fullness of the right side of the face and oral examination revealed the right tonsil and soft palate pushed medially.

CT of the base of the skull revealed a right parapharyngeal mass, which was compressing the oropharynx and carotid vessels. The lesion revealed osseous and lipomatous components [Figure - 1]. A CT diagnosis of ossified lipoma was considered.

The tumor was excised though right transmandibular transcervical approach. Biopsy report of the tumor specimen after decalcification was confirmed to be osteolipoma.


   Discussion Top


Lipomas consisting of mature fat grow insidiously, are asymptomatic and thus reach large size and cause cosmetic complications because of their anatomic site. Lipoma is rare during first two decades of life and usually makes its appearance when fat begins to accumulate in an individual. The two types of lipoma are: a) subcutaneous and b) deep lipoma. The deep lipomas occur in varying locations such as forehead, scalp, chest wall, pleura, pelvis and retroperitoneum [3] . When they are of long standing duration, growth in size and osseous metaplasia has been observed [1]

Osteolipomas have commonly been reported in intracranial sites such as suprasellar, interpeduncular and quadrigeminal cisterns [4] . These lipomas in contrast to the lipomas at other intracranial sites contain a peripheral ossified component [5] . Compared to intracranial lipomas, ossification of extracranial lipomas is even more rare. Among a series of 635 extracranial, soft tissue masses differentiating as adipose tissue, none contained osseous tissue [6] . Ohno et al have reported a single case of osteolipoma in the parapharyngeal space [2] .

CT scans permit excellent evaluation of calcified or ossified components of lipoma [7] . Because its clinical course is generally benign, an asymptomatic osteolipoma can be managed without surgery when the diagnosis is established on radiological grounds. When the lesion becomes symptomatic or diagnosis is in question, excision of the lesion is mandatory. In our patient, though the CT diagnosis was confirmatory of osteolipoma, excision was mandatory because of the clinical presentation by the patient.

 
   References Top

1.Murphy NG: Ossifying lipoma. Br J Radiol 1974; 47:97   Back to cited text no. 1    
2.Ohno Y, Muraoko M, Ohashi Y, Nakai Y, Wakara K : Osteolipoma in the parapharyngeal space . Eur Ach Otorhinolaryngol 1998; 255: 315-317  Back to cited text no. 2    
3.De Weerd JH Dockerty MB: Lipomatous retroperitoneal tumors. Am J Surg 1952; 84: 397   Back to cited text no. 3    
4.Truwitz CL, Barkowich AJ: Pathogenesis of intracranial lipoma MR study in 42 patients. Am J Roentgenol 1990; 155: 855-864   Back to cited text no. 4    
5.Wickremesekera AC, Christie M, Marks PV: Ossified lipoma of the interpeduncular fossa: a case report and review of the literature. Brit J Neurosurg 1993; 7: 323-326  Back to cited text no. 5    
6.Allen PW: Tumors and proliferations of adipose tissue. In: Sternberg SS, ed. Masson Monographs in diagnostic pathology. New York: Masson publishing, 1981   Back to cited text no. 6    
7.Kikuchi K, Kowada M, Watanabe K: Computed tomography of an intracranial lipoma confined in the suprasellar cistern. Comp Med Imag Graph 1994; 18:187-192  Back to cited text no. 7    

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Correspondence Address:
D S Shetty
Hayagreeva Nagar, 1st Road, Udipi 576102, Karmataka
India
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Source of Support: None, Conflict of Interest: None


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