Phimosis and Paraphimosis 

Updated: Aug 05, 2017
Author: Hina Z Ghory, MD; Chief Editor: Gil Z Shlamovitz, MD, FACEP 

Overview

Practice Essentials

In phimosis, the prepuce (foreskin) is too tight to be retracted to reveal the glans penis. Physiologic phimosis occurs naturally in newborn males. Pathologic phimosis defines an inability to retract the foreskin after it was previously retractible or after puberty, usually secondary to distal scarring of the foreskin. Paraphimosis is the entrapment of a retracted foreskin behind the coronal sulcus and is a disease of uncircumcised or partially circumcised males.[1, 2, 3, 4, 5]

Physiologic phimosis results from adhesions between the epithelial layers of the inner prepuce and glans. These adhesions spontaneously dissolve with intermittent foreskin retraction and erections, so that as males grow, physiologic phimosis resolves with age.

Poor hygiene and recurrent episodes of balanitis or balanoposthitis lead to scarring of preputial orifices, leading to pathologic phimosis. Forceful retraction of the foreskin leads to microtears at the preputial orifice that also leads to scarring and phimosis. Elderly persons are at risk of phimosis secondary to loss of skin elasticity and infrequent erections.

Patients with phimosis, both physiologic and pathologic, are at risk for developing paraphimosis when the foreskin is forcibly retracted past the glans and/or the patient or caretaker forgets to replace the foreskin after retraction. Penile piercings increase the risk of developing paraphimosis if pain and swelling prevent reduction of a retracted foreskin.

With time, impairment of venous and lymphatic flow to the glans leads to venous engorgement and worsening swelling. As the swelling progresses, arterial supply is compromised, leading to penile infarction/necrosis, gangrene, and eventually, autoamputation.

Pathologic phimosis may be detected in males who report painful erections, hematuria, recurrent urinary tract infections, preputial pain, or a weakened urinary stream. (See below.)

Physiologic phimosis versus pathologic phimosis. Physiologic phimosis versus pathologic phimosis.

The uncircumcised male penis comprises the penile shaft, the glans penis, the coronal sulcus, and the foreskin/prepuce, as shown below.

Anatomy of the penis. Anatomy of the penis.

There are many techniques of paraphimosis reduction, including manual reduction and the osmotic method, puncture method, and hyaluronidase method (see Treatment).  The main goal of each method is to reduce the foreskin to its naturally occurring position over the glans penis by manipulating the edematous glans and/or the distal prepuce. Sterile technique should be used for all invasive procedures.[6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]

Epidemiology

Up to 10% of males will have physiologic phimosis at 3 years of age, and a larger percentage of children will have only partially retractible foreskins. One to five percent of males will have nonretractible foreskins by age 16 years.[1, 2, 5]

In a Danish study, phimosis was the most frequently reported indication (95.0%) for foreskin surgery in boys younger than 18 years. The remaining 5.0% underwent surgery because of frenulum breve causing problems during erection. Nine patients needed a second surgery because of recurrent phimosis.[3]

A study of adult patients who underwent circumcision found that the most common indications were phimosis (46.5%), dyspareunia (17.8%), balanitis (14.4%), and concurrent phimosis and balanitis (8.9%). In most older patients, the reason for adult circumcision was concurrent phimosis and balanitis or cancer, whereas in younger patients, dyspareunia was the most common cause. The complication rate was 3.5%, and there was no significant difference in complication rates between the older patient group and the younger patient group.[17]

Patient Education

Parents should be educated about the normalcy of congenital phimosis and the time course of its resolution. The dangers of forcibly retracting the foreskin for hygienic purposes should be stressed. If the prepuce does not readily retract, parents should not attempt to clean under it.

Patients and parents of children should be educated on the importance of reduction of the foreskin after each cleaning.

All providers of adult care should be made aware of the risk of paraphimosis associated with bladder catheterization. They should be reminded to always reduce the foreskin after cleaning and catheterization.

For patient education resources, see the Men's Health Center, as well as Foreskin Problems and Circumcision.

 

Presentation

History

Parents of patients with physiologic phimosis may bring in the patient after noting an inability to retract the foreskin during routine cleaning or bathing. Parents may also be alarmed by "ballooning" of the prepuce during urination — a normal finding.

Pathologic phimosis may be detected in males who report painful erections, hematuria, recurrent urinary tract infections, preputial pain, or a weakened urinary stream. (See below.)

Physiologic phimosis versus pathologic phimosis. Physiologic phimosis versus pathologic phimosis.

Paraphimosis classically presents with a painful, swollen glans penis in the uncircumcised or partially circumcised patient. A preverbal infant may present only with irritability. Occasionally, the paraphimosis may be an incidental finding noted by a caretaker of a debilitated patient. (See below.)

Paraphimosis. Paraphimosis.

Paraphimosis is classically seen in one of the following populations[18, 19]

  • Children whose foreskins have been forcefully retracted or who forget to reduce their foreskin after voiding or bathing

  • Adolescents or adults who present with paraphimosis in the setting of vigorous sexual activity[20]

  • Men with chronic balanoposthitis

  • Patients with indwelling catheters in whom caretakers forget to replace the foreskin after catheterization or cleaning

Urinary obstruction is a late feature.

Physical

Phimosis includes the following:

  • The foreskin cannot be retracted proximally over the glans penis.

  • In physiologic phimosis, the preputial orifice is unscarred and healthy appearing.

  • In pathologic phimosis, a contracted white fibrous ring may be visible around the preputial orifice

    Physiologic phimosis versus pathologic phimosis. Physiologic phimosis versus pathologic phimosis.

Paraphimosis includes the following:

  • The foreskin is retracted behind the glans penis and cannot be replaced to its normal position.

  • The foreskin forms a tight, constricting ring around the glans.

  • Flaccidity of the penile shaft proximal to the area of paraphimosis is seen (unless there is accompanying balanoposthitis or infection of the penis).

  • With time, the glans becomes increasingly erythematous and edematous.

  • The glans penis is initially its normal pink hue and soft to palpation. As necrosis develops, the color changes to blue or black and the glans becomes firm to palpation.

 

DDx

Differential Diagnoses

 

Treatment

Emergency Department Care

Patients with phimosis rarely require any emergency intervention and should be referred to a urologist on an outpatient basis prior to development of irreversible penile damage.

A paraphimosis is a urologic emergency and needs to be attended to immediately. Many techniques of paraphimosis reduction have been described in case studies, though none have been tested in randomized control trials.[21] The main goal of each method is to reduce the foreskin to its naturally occurring position over the glans penis by manipulating the edematous glans and/or the distal prepuce. When necessary, all of the following procedures can be facilitated by the use of local anesthesia, a penile block[6] using lidocaine hydrochloride without epinephrine or, especially in children, conscious sedation. Sterile technique should be used for all invasive procedures.[7, 8]

The authors recommend attempting to reduce the paraphimosis in the following sequence, from least to most invasive. The urologist should be involved early on in all cases of paraphimosis that require more than minimally invasive methods of reduction.

Manual reduction

Manual reduction is performed by placing both index fingers on the dorsal border of the penis behind the retracted prepuce and both thumbs on the end of the glans. The glans is pushed back through the prepuce with the help of constant thumb pressure while the index fingers pull the prepuce over the glans.

This technique may be facilitated by the use of ice and/or hand compression on the foreskin, glans, and penis to minimize edema of the glans prior to manual reduction. Soaking the penis in a glove full of ice for 5 minutes before attempting manual reduction has been reported to be effective 90% of the time.[21]

An elastic bandage can also be wrapped from the glans to the base of the penis for 5-7 minutes to minimize edema.[22]

Noncrushing clamps can be placed on the constricting portion of the foreskin at the 3- and 9-o'clock positions to apply gentle continuous symmetrical traction.[23] Also see, Paraphimosis Reduction.

Osmotic method

Substances with a high solute concentration can be used to osmotically draw out fluid from the edematous glans and foreskin prior to manual reduction. Granulated sugar spread over the glans and foreskin for 2 hours has been shown to facilitate manual reduction.[23] Alternatively, a swab soaked in 50 mL of 50% dextrose (more readily available in the ED) can be wrapped around the glans and foreskin for an hour prior to attempting reduction.[23] A major drawback of these methods is that they are time consuming.

Puncture method

This method requires the use of a 21- to 26-gauge needle to puncture openings into the foreskin to allow edematous fluid to escape from the puncture sites during manual compression. Successful reductions have been reported with single and up to 20 punctures.[23]

Hyaluronidase method

The puncture method can be enhanced by the injection of 1-mL aliquots of hyaluronidase (using a tuberculin syringe) into one or more sites of the edematous prepuce. It is thought that hyaluronidase disperses extracellular edema by modifying the permeability of intercellular substance in connective tissue. The use of this method is contraindicated in those with the presence of infection or cancer, since the technique may result in the spread of bacteria or malignant cells. Drawbacks to this method include the risk of anaphylaxis and shock and the lack of availability of hyaluronidase in many EDs.

Aspiration

A tourniquet is applied to the shaft of the penis. A 20-gauge needle is then used to aspirate 3-12 mL of blood from the glans, parallel to the urethra. This reduces the volume of the glans sufficiently to facilitate manual reduction.

Vertical incision

If none of the above methods are successful, the constricting band of the foreskin should be incised using a 1-2 cm longitudinal incision between two straight hemostats placed in the 12-o'clock position for hemostasis.[22] This frees the constricting ring and allows for easy reduction of the paraphimosis. The incised margins can then be reapproximated using 4/0 nylon sutures. Also see, Dorsal Slit of the Foreskin and Nerve Block, Dorsal Penile. (See below.)

Dorsal slit procedure. Dorsal slit procedure.

Emergent circumcision

This is a last resort, to be performed by a urologist, to achieve the necessary reduction of a paraphimosis.

Consultations

A paraphimosis is a urologic emergency, and prompt efforts to reduce the paraphimosis must be made by the emergency physician. If minimally invasive measures fail to reduce the paraphimosis, a urologic consultation is required.

Referral to outpatient urology follow-up is required in cases of pathologic phimosis.[1] Not all cases of phimosis require circumcision. The urologist, in consultation with the patient and his family, may try a course of topical steroids or preputioplasty.

A paraphimosis that is reduced with minimal intervention by the ED physician still requires outpatient urology follow-up in anticipation of recurrences and evaluation for possible circumcision. Trauma to the foreskin during reduction of a paraphimosis may lead to the development of phimosis in up to 30% of patients.[23]

Complications

Complications of phimosis or paraphimosis may include the following:

  • Recurrence

  • Posthitis

  • Necrosis and gangrene of the glans[20]

  • Autoamputation

In a Brazilian study of 30 patients who underwent circumcision due to phimosis, human papillomavirus (HPV) was present in 46.66%, of whom 50% had high-risk HPV genotypes. Only 16.36% of 100 asymptomatic patients were found to be positive for HPV, and only 1 showed high-risk HPV.[24]

According to a study in Taiwan, phimosis with preputial fissures may be a sign of undiagnosed diabetes mellitus. In 28 patients with acquired phimosis and preputial fissures, diabetes was confirmed in all 28 patients, as compared with only 2 patients out of 28 with acquired phimosis without preputial fissures. Statistically significant differences were found in body mass index, random plasma glucose, glucosuria, and glycosylated hemoglobin levels, but not in age, family history of diabetes, hypertension, or classic hyperglycemic symptoms.[25]

 

Medication

Medication Summary

Up to 95% of cases of phimosis have been shown to respond to application of topical steroids to the preputial orifice,[9] although some studies have suggested that this response rate may decline several months after the regimen is completed.[10] An initial attempt at medical intervention has been shown to reduce costs by 27.3% in comparison with primary circumcision as a treatment of phimosis in infants and children.[26] Complications of medication use are limited to preputial pain and hyperemia.

The ED physician may choose to recommend 0.1 -0.05% betamethasone dipropionate applied to the preputial orifice twice a day for 4-6 weeks.[10]

Betamethasone valerate 0.1%, 0.2%, and 0.2% in combination with hyaluronidase has also been shown to be effective. In one study, patients who initially had partial or no response to this regimen reached complete response after 60 days of treatment.[11]

Anand and Kapoor reported on the use of the osmotic diuretic mannitol to reduce paraphimosis. The procedure required no anesthesia and was associated with minimal or no patient discomfort, according to the authors. They compared it to multiple needle punctures and other nonosmotic methods of reducing paraphimosis. A complete reduction of paraphimosis occurred after mannitol-soaked gauze had been placed over the edematous prepuce for about 30-45 minutes in 6 patients.[12]

 

Questions & Answers