(222) MANAGEMENT OF A RETAINED NEEDLE - A COMPLICATION OF INTRACAVERNOSAL INJECTION THERAPY
Authors: Wu S , Warren C , Punjani N 
Published: December 2024

Abstract

Introduction
Intracavernosal injections (ICI) is a well-established treatment for erectile dysfunction with common complications including priapism, penile ecchymosis and injection site pain. A rarer complication is breakage and retention of the needle inside the penis during self-injection, with only 16 cases reported in the literature from 1991 to 2023.

Objective
To report a case of needle breakage and retention as a complication of ICI and describe the optimal management of retained needle in the penis.

Methods
A 69-year-old male with a history of erectile dysfunction on TriMix presented to the Urology Department after half of his ICI needle broke off in the right side of his penis following self-injection. He denied having any pain or discomfort but reported that a small nodule had formed at the site. On physical examination, a nodule was palpated at the right base of his penis. He underwent pelvic X-ray and penile ultrasound, noting a 4-5 mm foreign body in the right base of the penis without gas in the soft tissue. As the retained needle was not significantly affecting him, he decided not to proceed with intervention and continued with ICI on the contralateral side. He began noticing burning pain at the site of injection, with development of a hard nodule that self-resolved each time. Due to worsening erectile function, he returned to clinic one year later to discuss inflatable penile prosthesis placement, where he inquired about removal of the retained needle. A small, nontender nodule was still noted at the right base of the penis.

Results
The patient underwent penile exploration in the operating room, revealing an obvious inflammatory fibrous nodule at the right base of the penis corresponding to the location of the needle on previous ultrasound. There was also a similar, smaller nodule contralaterally where the patient had continued ICI. Ultrasound guidance was used intraoperatively to identify the needle, then a spinal needle was used to triangulate with the needle fragment. The penis was sharply dissected along the spinal needle with iris scissors until the 4 mm needle fragment was identified and removed in its entirety. Dissection then began to excise the inflammatory nodule. However, despite attempts to completely mobilize Buck’s fascia and the nerves, the neurovascular bundles were quite adherent to the nodule from an inflammatory reaction and thus it was unable to be excised. A small possible corporotomy was then identified and repaired using 2-0 PDS. Injectable saline was then used to induce an erection and confirm no defects in the corpora. The patient recovered well post-operatively without any complications, and the nodules were noted to be much smaller at his one-month postoperative visit.

Conclusions
ICI needle breakage and entrapment in the penis is a rare complication. The diagnosis of needle retention includes imaging such as pelvic radiographs or penile ultrasound to locate the needle. While less invasive approaches can be attempted for removal, they may be less effective and cause further damage to surrounding tissue. Surgical exploration under ultrasound guidance is a safe and effective approach to needle removal.

Disclosure
No.