PMC4719352_01
Three Year old boy presented with pedunculated mass arising from the proximal metaphysio-diaphyseal junction of the middle phalanx of middle finger of right hand (Clinical and Radiographic appearance
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F1
On physical examination a pedunculated bony swelling was noticed to be arising from dorsoulnar aspect of the base of the middle phalanx measuring 2x1x3 cm (Fig 1). Radiographs of the right hand showed a pedunculated mass arising from the proximal metaphysio-diaphyseal junction of middle phalanx (Fig 1).
Sessile bony swelling of size 2x1x1 cm is noticed on the medial aspect of second toe of right foot with an associated valgus deformity.
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F2
Another sessile bony swelling of size 2x1x1 cm is noticed on the medial aspect of second toe of right foot with an associated valgus deformity (Fig 2). Radiographs of the right foot showed a sessile bony lesion arising from the medial aspect of base of proximal phalanx, with its medulla in continuity with the medullary cavity of the phalanx (Fig 2).
Histopathological picture of BPOP. Note the random mixture of 3 tissue types : fibrous tissue(), bone () and cartilage (#). Note the cellular atypia of the cartilage cells.
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F3
Histologically the lesion had three components: fibroblastic spindle cells, cartilage with mild cellular atypia and irregular bony trabeculae, all present in intermixed islands without any specific pattern (Fig 3).