A neurosurgical tissue removal assembly, comprising: an endoscope with an endoscope shaft; a trocar having a shaft with a working channel any an endoscope channel; and a tissue removal device, wherein the tissue removal device comprises: a handpiece having a lower housing disposed along a first longitudinal axis and an upper housing disposed along a second longitudinal axis that is spaced apart from the first longitudinal axis, an outer cannula having an outer cannula lumen an outer cannula proximal end, an outer cannula distal end, and an outer cannula opening adjacent the outer cannula distal end, wherein the outer cannula is mounted in the upper housing along the second longitudinal axis for rotational movement and wherein the outer cannula opening defines a cutting edge for severing tissue, and the outer cannula is removably insertable into the working channel, an inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having an inner cannula lumen an inner cannula proximal end, an inner cannula open distal end, a cutting edge at the inner cannula distal end, a living hinge, a cutting section, and a body section, with the hinge being located between the cutting section and the body section, wherein the cutting section is pivotable when the inner cannula reciprocates within the outer cannula lumen, a motor disposed in the lower housing portion, wherein the motor is operatively connected to the inner cannula so as to reciprocate the inner cannula within the outer cannula; and a tissue collector in fluid communication with the inner cannula lumen, wherein at least a portion of the outer cannula is disposed in the working channel and at least a portion of the endoscope shaft is disposed in the endoscope channel; and wherein rotation of the outer cannula about the second longitudinal axis with respect to the handpiece causes the inner cannula to rotate about the second. an endoscope with an endoscope shaft; a trocar having a shaft with a working channel any an endoscope channel; and a tissue removal device, wherein the tissue removal device comprises: a handpiece having a lower housing disposed along a first longitudinal axis and an upper housing disposed along a second longitudinal axis that is spaced apart from the first longitudinal axis, an outer cannula having an outer cannula lumen an outer cannula proximal end, an outer cannula distal end, and an outer cannula opening adjacent the outer cannula distal end, wherein the outer cannula is mounted in the upper housing along the second longitudinal axis for rotational movement and wherein the outer cannula opening defines a cutting edge for severing tissue, and the outer cannula is removably insertable into the working channel, an inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having an inner cannula lumen an inner cannula proximal end, an inner cannula open distal end, a cutting edge at the inner cannula distal end, a living hinge, a cutting section, and a body section, with the hinge being located between the cutting section and the body section, wherein the cutting section is pivotable when the inner cannula reciprocates within the outer cannula lumen, a motor disposed in the lower housing portion, wherein the motor is operatively connected to the inner cannula so as to reciprocate the inner cannula within the outer cannula; and a tissue collector in fluid communication with the inner cannula lumen, wherein at least a portion of the outer cannula is disposed in the working channel and at least a portion of the endoscope shaft is disposed in the endoscope channel; and wherein rotation of the outer cannula about the second longitudinal axis with respect to the handpiece causes the inner cannula to rotate about the second. a handpiece having a lower housing disposed along a first longitudinal axis and an upper housing disposed along a second longitudinal axis that is spaced apart from the first longitudinal axis, an outer cannula having an outer cannula lumen an outer cannula proximal end, an outer cannula distal end, and an outer cannula opening adjacent the outer cannula distal end, wherein the outer cannula is mounted in the upper housing along the second longitudinal axis for rotational movement and wherein the outer cannula opening defines a cutting edge for severing tissue, and the outer cannula is removably insertable into the working channel, an inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having an inner cannula lumen an inner cannula proximal end, an inner cannula open distal end, a cutting edge at the inner cannula distal end, a living hinge, a cutting section, and a body section, with the hinge being located between the cutting section and the body section, wherein the cutting section is pivotable when the inner cannula reciprocates within the outer cannula lumen, a motor disposed in the lower housing portion, wherein the motor is operatively connected to the inner cannula so as to reciprocate the inner cannula within the outer cannula; and a tissue collector in fluid communication with the inner cannula lumen, wherein at least a portion of the outer cannula is disposed in the working channel and at least a portion of the endoscope shaft is disposed in the endoscope channel; and wherein rotation of the outer cannula about the second longitudinal axis with respect to the handpiece causes the inner cannula to rotate about the second.