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Specimen 12

Femur. Tubular sequestrum from amputated stump.

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Specimen 17

Forearm. Lower two-thirds of left forearm. Amputation was performed for gangrene/ulceration of wrist following removal of middle finger (FIG. 1, bone stump at amputation site).

Specimen 15

Femur. Oblique gunshot fracture (FIG. 1). Upper and lower portions of the bone are separated, but united by callus in several places.

Specimen 3

Femur. The shaft is fractured obliquely 11 cm from the distal end. Union has not occurred despite the presence of a large amount of callus (FIG. 1) at the ends of both fragments. A sequestrum is evident at the bottom of the upper fragment.

Specimen 21

Femur. 2.5 inches of stump have been removed for "protrusion". The sequestrum has partially separated from the callus and the residual viable bone.

Specimen 22

Femur. The entire shaft is necrotic (FIG. 1, sequestrum) and partially encased by an irregular involucrum.

Specimen 23

Femur. Stump showing a sequestrum partly covered by a conical involucrum.

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Specimen 25

Tibia/Fibula. Lower leg amputation.

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Specimen 20

Humerus: Gunshot fracture of shaft associated with extensive callus formation of the upper two thirds and partial separation of the sequestrum (FIG. 1) below.

Specimen 10

Femur. Cut surface of the upper femur with acetabulum shows necrosis of medullary tissue (FIG. 1) that extends from the margin of amputation to the mid-portion of the neck.