Part I

A 35-year-old Caucasian woman presented with a 14-month history of relapsing painful fingertip swelling of the left middle finger observed after a minor trauma. Conventional radiographs (Fig. 1) were performed at presentation. After failure of conservative treatment, the patient underwent initial surgery without success. Follow-up MRI (Fig. 2) and CT (Fig. 3) were obtained at our institution 6 months after the first surgical procedure (Figs. 1a–b, 2a–d, 3 and 4).

Fig. 1
figure 1

Posteroanterior (a) and lateral (b) radiographs of the left long finger

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Fig. 2
figure 2

Sagittal (a) and axial (b) fat-suppressed gadolinium-enhanced T1-weighted turbo spin-echo MR images of the left long finger (right side of the picture in b). Four-dimensional contrast-enhanced MR angiographic images of the left hand in the arterial (c) and venous (d) phase

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Fig. 3
figure 3

Axial unenhanced CT image of the left middle (right side of the picture) and ring fingers

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Fig. 4
figure 4

Histopathology image (hematoxylin and eosin stain (H&E); original magnification × 200)

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