PubMed · 10615333
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O A Ung, N R Wetzig. 1999-11-01. Sentinel node biopsy: evaluating a new technique.. https://doi.org/10.5694/j.1326-5377.1999.tb123743.x
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A 49-year-old male presented with a painful progressive swelling in his right axillar region, without further complaints, which had been present for 2 weeks. On radiological examination a peripheral circumferential zone of mineralisation was seen in the right teres major muscle. An incision biopsy specimen showed a lesion of fibroblastic tissue in which areas of osteoid and fragmented lamellar bone tissue, without signs of malignancy. The diagnosis was myositis ossificans circumscripta. This is a rare benign ossifying lesion in skeletal muscles, mostly caused by a trauma and with an average age of occurrence between 20 and 30 years old. It must be differentiated from extra-skeletal osteosarcoma. The pathogenesis is unknown. Because it is a benign and self-limiting disorder, surgical excision is only necessary in case of mechanical hindrance. The patient's swelling partially regressed and he had no further complaints.
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