A biopsy system, comprising: (a) an introducer, wherein the introducer comprises: (i) a cannula comprising an open distal end and an open proximal end, and (ii) at least two leaves extending distally from the open distal end of the cannula, wherein the at least two leaves are positioned relative to the cannula to define an open space; and (b) a biopsy device, wherein the biopsy device comprises: (i) a body, and (ii) an elongate needle extending distally from the body, wherein the elongate needle includes a closed distal end, wherein the closed distal end comprises a sharp tip; wherein the cannula of the introducer is configured to slidably receive the elongate needle of the biopsy device; and characterized in that: the cannula comprises an ovular cross-section, wherein the ovular cross-section defines a lumen extending between the open distal end and the open proximal end, wherein the ovular cross-section of the cannula includes at least two flat sides and a top portion and bottom portion; wherein at least a portion of each of the at least two leaves extends from a respective flat side of the at least two flat sides of the cannula, and the open space is defined between the at least two flat sides of the cannula; wherein the elongate needle includes an ovular cross-section, wherein the ovular cross-section defines two straight sides; and wherein the top and bottom portions of the cannula each define a gap between the cannula of the introducer and the elongate needle of the biopsy device when the elongate needle of the biopsy device is slidably received by the cannula of the introducer. (a) an introducer, wherein the introducer comprises: (i) a cannula comprising an open distal end and an open proximal end, and (ii) at least two leaves extending distally from the open distal end of the cannula, wherein the at least two leaves are positioned relative to the cannula to define an open space; and (i) a cannula comprising an open distal end and an open proximal end, and (ii) at least two leaves extending distally from the open distal end of the cannula, wherein the at least two leaves are positioned relative to the cannula to define an open space; and (b) a biopsy device, wherein the biopsy device comprises: (i) a body, and (ii) an elongate needle extending distally from the body, wherein the elongate needle includes a closed distal end, wherein the closed distal end comprises a sharp tip; wherein the cannula of the introducer is configured to slidably receive the elongate needle of the biopsy device; and characterized in that: the cannula comprises an ovular cross-section, wherein the ovular cross-section defines a lumen extending between the open distal end and the open proximal end, wherein the ovular cross-section of the cannula includes at least two flat sides and a top portion and bottom portion; wherein at least a portion of each of the at least two leaves extends from a respective flat side of the at least two flat sides of the cannula, and the open space is defined between the at least two flat sides of the cannula; wherein the elongate needle includes an ovular cross-section, wherein the ovular cross-section defines two straight sides; and wherein the top and bottom portions of the cannula each define a gap between the cannula of the introducer and the elongate needle of the biopsy device when the elongate needle of the biopsy device is slidably received by the cannula of the introducer. (i) a body, and (ii) an elongate needle extending distally from the body, wherein the elongate needle includes a closed distal end, wherein the closed distal end comprises a sharp tip; the cannula comprises an ovular cross-section, wherein the ovular cross-section defines a lumen extending between the open distal end and the open proximal end, wherein the ovular cross-section of the cannula includes at least two flat sides and a top portion and bottom portion; wherein at least a portion of each of the at least two leaves extends from a respective flat side of the at least two flat sides of the cannula, and the open space is defined between the at least two flat sides of the cannula; wherein the elongate needle includes an ovular cross-section, wherein the ovular cross-section defines two straight sides; and wherein the top and bottom portions of the cannula each define a gap between the cannula of the introducer and the elongate needle of the biopsy device when the elongate needle of the biopsy device is slidably received by the cannula of the introducer.