eMJA     The Medical Journal of Australia

Home | Issues | eMJA shop | Classifieds | Contact | More... | Topics | Search | Login | Buy full access   

Editorials

Treating phimosis

Paddy A Dewan
MJA 2003 178 (4): 148-150

Introduction

 —

Why does the rate of circumcision for phimosis exceed the expected rate of phimosis?

 —

What is the optimal treatment for phimosis?

 —

Secondary Keywords

 —

Study Design

 —

Author details

First, let's decide what we really mean by phimosis

Circumcision remains a topic of significant debate in Australia, even though there has been a marked reduction in the rate of circumcision in this country, which has reflected that of England, where 95% of boys were circumcised in the 1930s, declining to 6.5% in the early 1980s.1 In this issue of the Journal (page 155), Spilsbury and colleagues report that many boys are circumcised for phimosis before the age of five years, despite phimosis being rare in boys of this age.2 They reviewed all circumcisions in Western Australian hospitals between 1981 and 1999, recording that the rate of medically indicated circumcisions increased during that period, and that, if the 1999 rate remains stable, it would be seven times the expected incidence of phimosis in the group of boys aged less than 15 years. These findings imply a high rate of unnecessary surgery, similar to the findings from studies conducted in England.1,3

Spilsbury and colleagues define phimosis as "narrowing of the preputial orifice leading to non-retractability of the prepuce". Such a definition would result in many boys under the age of five years being diagnosed with a condition for which surgery is considered to be justified. Their use of the term phimosis seems to mean pathological phimosis. To clarify, the prepuce is regarded as normal in boys if non-retractable because of preputial adhesions, or if the skin is physiologically non-retractable because of narrowing (ie, physiological phimosis). Figure 1 shows a normal foreskin that is non-retractable.The terms phimosis and non-retractable are not sufficiently clear in isolation, and need to be qualified. Rickwood and colleagues have recently given a succinct definition, stating that the ". . . normality, with an unscarred and pliant preputial orifice, is clearly distinguishable from pathological phimosis [shown in Figure 2], a condition unambiguously characterised by secondary cicatrisation of the orifice . . .".1 The addition of the word "pathological" or "physiological" is necessary to differentiate the different prognoses for phimosis, and, if the foreskin is not retractable because of adhesions to the glans, that information needs to have been included in the definition and documentation. Thus, rewriting the extract from the article by Spilsbury and colleagues, "many boys are circumcised for (pathological or physiological) phimosis before the age of five years, despite (pathological) phimosis being rare in this group".

Why does the rate of circumcision for phimosis exceed the expected rate of phimosis?

Clearly, the word "phimosis" in isolation does not have sufficient power to separate disease from a normal condition. Further, if parents feel there will not be support from the general practitioner, they may complain of symptoms in their child for the purpose of avoiding the debate about the appropriateness of circumcision for cosmetic reasons. Alternatively, the GP may support the parents' desire to have their boy circumcised, but expect resistance from the surgeon, and thus tend to present the child as having a pathological diagnosis. Such manipulation is not surprising when dealing with such an emotive topic. Nor is it necessarily improper given the differing cultural and medical views on the value of circumcision. A further explanation for the high circumcision rate for (pathological) phimosis might be a reluctance to record non-medical circumcision as such, using the appropriate International classification of diseases codes.4,5

What is the optimal treatment for phimosis?

A wide body of evidence shows that most boys can be treated successfully with steroid cream, and that circumcision is required only infrequently.6-9 Unfortunately, almost all of these studies lack the distinction between pathological phimosis, as defined by Rickwood et al,1 and other foreskins that are non-retractable either as a result of preputial adhesions or because they are physiologically non-retractable. However, clinical experience suggests that most cases of pathological phimosis can be successfully treated with steroid cream, provided the steroid cream is applied to the partly retracted prepuce three times daily. After 4–6 weeks the prepuce should be retracted at the time of bathing and after voiding.10

It also appears that even balanitis xerotica obliterans can be successfully treated without circumcision,11 particularly if steroid treatment is supplemented with the minor operation of preputioplasty, in which the distal end of the prepuce is widened.12 Unfortunately, because the use of the term phimosis does not recognise the variations of the normal foreskin, the roles of observation, steroid cream and circumcision have not yet been compared in a study that has used a rigorous definition of pathological phimosis.

There remains debate about the care of the normal prepuce in infant males. Parents are usually advised not to touch it, whereas the normal hygiene approach to body parts is one of not hurting, but keeping clean. The latter policy may help prevent skin irritation at the end of the prepuce, which may be part of the cause of pathological phimosis and balanitis (although this needs to be supported by appropriate studies).

Evidence-based discussion about circumcision with parents will only be able to occur once we have undertaken prospective studies of the care of the prepuce and the use of steroids for treating phimosis. Parents will then be confident that their uncircumcised boy will not develop disease attributable to the nature of the foreskin. However, we should first focus on integrating a standard definition of phimosis into the study protocols.

In the meantime, we should respect the view of parents who regard circumcision as good treatment for their child, given certain provisos. One is that they have been made aware of other options. The other is that they are making an appropriately informed decision about the management of their boy's prepuce because they are aware that "phimosis" does not equate to "pathology", and "pathology" does not always need surgery.

Finally, Van Howe et al warn that physicians who perform "involuntary" circumcision are required to provide full disclosure. However, they also warn that, "with current legal precedent, this may not be enough" to protect the doctor from legal action,13 further emphasising the need to develop sound definitions on which to base our treatment of the prepuce.

1: A normal foreskin that is non-retractable, with pouting of the most distal portion when gentle retraction is attempted.

2: This foreskin shows the dome configuration of a boy with "true" phimosis. The fibrosis and pinhole meatus are also seen.

  1. Rickwood AMK, Kenny SE, Donnell SC. Towards evidence based circumcision of English boys: survey of trends in practice. BMJ 2000; 321: 792-793. <PubMed>
  2. Spilsbury K, Semmens JB, Wisniewski ZS, Holman CDJ. Circumcision for phimosis and other medical indications in Western Australian boys. Med J Aust 2003; 178: 155-158.<eMJA full text>
  3. Shankar KR, Rickwood AM. The incidence of phimosis in boys. BJU Int 1999; 84: 101-102. <PubMed>
  4. Australian version of the international classification of diseases, 9th revision, clinical modification (ICD-9-CM). Sydney: National Coding Centre, 1995.
  5. International statistical classification of diseases and related health problems, 10th revision, Australian modification (ICD-10-AM). Sydney: National Centre for Classification, 2000.
  6. Berdeu D, Sauze L, Ha-Vinh P, Blum-Boisgard C. Cost-effectiveness analysis of treatments for phimosis: a comparison of surgical and medicinal approaches and their economic effect. BJU Int 2001; 87: 239-244. <PubMed>
  7. Dewan PA, Tieu HC, Chieng BS. Phimosis: is circumcision necessary? J Paediatr Child Health 1996; 32: 285-289. <PubMed>
  8. Marzaro M, Carmignola G, Zoppellaro F, et al. Phimosis: when does it require surgical intervention? Minerva Pediatr 1997; 49: 245-248. <PubMed>
  9. Van Howe RS. Cost-effective treatment of phimosis. Pediatrics 1998; 102: E43. <PubMed>
  10. Pascotto R, Giancotti E. The treatment of phimosis in childhood without circumcision: plastic repair of the prepuce. Minerva Chir 1998; 53: 561-565. <PubMed>
  11. Kiss A, Csontai A, Pirot L, Nyirady P, et al. The response of balanitis xerotica obliterans to local steroid application compared with placebo in children. J Urol 2001; 165: 219-220. <PubMed>
  12. Lane TM, South LM. Lateral preputioplasty for phimosis. J R Coll Surg (Edin) 1999; 44: 310-312.
  13. Van Howe RS, Svoboda JS, Dwyer JG, Price CP. Involuntary circumcision: the legal issues. BJU Int 1999; 83 Suppl 1: 63-73. <PubMed>

(Received 23 Sep 2002, accepted 8 Jan 2002)

Royal Children's Hospital, Parkville, VIC.

Paddy A Dewan, PhD, MD, FRACS, Paediatric Urologist.

Reprints: Paddy A Dewan, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052.

Home | Issues | eMJA shop | Terms of use | Classifieds | More... | Contact | Topics | Search

The Medical Journal of Australia    eMJA  

©The Medical Journal of Australia 2003 www.mja.com.au PRINT ISSN: 0025-729X ONLINE ISSN: 1326-5377