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Diagnosis and treatment of intramedullary osteosclerosis: a report of three cases and literature review.

Abstract：

BACKGROUND:Intramedullary osteosclerosis (IMOS) is a rare condition without specific radiological findings except for the osteosclerotic lesion and is not associated with family history and infection, trauma, or systemic illness. Although the diagnosis of IMOS is confirmed after excluding other osteosclerotic lesions, IMOS is not well known because of its rarity and no specific feature. Therefore, these situations might result in delayed diagnosis. Hence, this case report aimed to investigate three cases of IMOS and discuss imaging findings and clinical outcomes. CASE PRESENTATION:All three cases were examined between 2015 and 2019. The location of osteosclerotic lesions were femoral diaphyses in the 60-year-old man (Case 1) and 41-year-old woman (Case 2) and tibial diaphysis in the 44-year-old woman (Case 3). All cases complained of severe pain and showed massive diaphyseal osteosclerotic lesions in plain radiograms and computed tomography (CT) scans. Cases 2 and 3 were examined using the triphasic bone scan, and a fusiform-shaped intense area of the tracer uptake on delayed bone image was detected in both cases without (Case 2) or slightly increased vascularity (Case 3) on the blood pool image, which was reported as a specific finding of IMOS. Open biopsy was performed in all cases, and histologic section showed trabecular bone sclerosis with hypocellular fibrous tissues, finally diagnosed as IMOS. The pain was sharply improved after biopsy and kept at the latest follow-up periods (34, 33, and 6 months in Cases 1, 2, and 3, respectively). CONCLUSIONS:Massive sclerotic lesions with severe pain in the diaphyseal region of long bones should be considered as IMOS to avoid the delayed diagnosis, although other sclerotic bony lesions should be carefully excluded. Triphasic bone scan with a fusiform-shaped intense area of tracer uptake on delayed bone image and without or slightly increased vascularity on the blood pool image will help confirm IMOS. The role of open biopsy was to confirm the diagnosis of IMOS and to give the severe pain relief immediately in the three cases, although more cases and long-term follow-up are necessary.

journal_name

BMC Musculoskelet Disord

journal_title

BMC musculoskeletal disorders

authors

Abe K,Yamamoto N,Hayashi K,Takeuchi A,Miwa S,Igarashi K,Higuchi T,Taniguchi Y,Yonezawa H,Araki Y,Morinaga S,Asano Y,Tsuchiya H

doi

10.1186/s12891-020-03758-5

subject

Has Abstract

pub_date

2020-11-19 00:00:00

pages

762

issue

issn

1471-2474

pii

10.1186/s12891-020-03758-5

journal_volume

pub_type

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Diagnosis and treatment of intramedullary osteosclerosis: a report of three cases and literature review.