title: Calcific haemorrhagic bursitis anterior to the knee mimicking a soft tissue sarcoma: report of two cases.
abstract: We describe the radiological and pathological findings of two cases of calcific haemorrhagic bursitis, one involving the superficial infrapatellar bursa and the other the prepatellar bursa. It was the presence of dystrophic calcification within the lesion that suggested a mineralizing soft tissue sarcoma such as synovial sarcoma. As the radiographic and MR features of the two conditions can be similar but the appropriate management very different, rare calcifying haemorrhagic bursitis needs to be included in the differential diagnosis of masses adjacent to the knee joint showing calcification.
authors.affiliation: Department of Radiology, Royal Orthopaedic Hospital, Woodlands, Northfield, Birmingham, B31 2AP, UK.
authors.forename: M
authors.initials: M
authors.lastname: Stahnke
authors.forename: D C
authors.initials: DC
authors.lastname: Mangham
authors.forename: A M
authors.initials: AM
authors.lastname: Davies
mesh_terms: D000368:Aged; D002062:Bursitis / Q000000981:diagnostic imaging* / Q000473:pathology; D002114:Calcinosis / Q000000981:diagnostic imaging* / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006470:Hemorrhage / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D011859:Radiography; D012509:Sarcoma / Q000000981:diagnostic imaging* / Q000473:pathology; D012983:Soft Tissue Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology