PMC5222950_01
(A-C) Clinical presentation of a multi-lobulated osteochondroma of the finger in an adult.
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Examination showed a multi-lobed bony mass located on the volar and dorsal aspects of the middle phalanx (Fig. 1).
Plain X-ray showing the tumor arising from the base of the middle phalanx.
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PIPJ was also restricted to 90  because of the mass effect. Plain x-rays showed a multi-lobed osteochondroma arising from the base of the middle phalanx (Fig. 2).
MRI of the tumor.
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MRI (Fig. 3) showed that the tumor measured 2.3 x 2.5 cm and also showed the medial displacement of the flexor tendons by the tumor mass.
Histology showing the regular bony trabeculae covered by the cartilage cap (H & E x 100).
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Histological examination was consistent with benign osteochondroma showing regular bony trabeculae arranged at 90  to the overlying cartilaginous cap (Fig. 4).
(A&B) Range of motion 8 months after surgery.
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The flexion contracture at the PIPJ improved from 25  to 15  and the range of motion in the arc of flexion of the PIPJ improved from 90  to 110  (Fig. 5).
X-ray 8 months after surgery showing the residual tumor.
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X-rays showed the residual tumor at the base of the middle phalanx (Fig. 6) and the patient was advised for long term follow-up.