Also called
Diphallasparatus, penile duplication (PD) or diphallic terata is a rare
developmental disorder where a male infant is born with two or more penises.
The first reported case was in Bologna; Italy (1609), by Johannes Jacob Wecker,
a Swiss female physician and philosopher.
It occurs
in 1 out of every 5.5 million males worldwide, and so far only about 100 cases
of diphallia have been recorded.
Diphallia, Picture credit mamamia.
Diphallia
is usually accompanied by other congenital abnormalities like Vertebral (spinal
bifida), renal (exstrophy of the bladder, bladder/urethra duplication), hindgut
(exstrophy of the cloaca), anorectal (colon and rectosigmoid duplication),
skeletal (pubic symphysis diastasis) skeletal muscle abnormalities (ventral
hernia) heart muscles abnormalities, etc.
Risk factors/Causes
It is
thought diphallia occurs in the fetus between the 23rd to 35th
day (3rd to 6th week) of gestation(pregnancy)
when an injury; chemical stress, or malfunctioning “homeobox genes” hamper proper function of the caudal cell mass of
the foetal mesoderm as the urogenital sinus separates from the genital tubercle
and rectum to form the penis.
The
embryologic explanation of diphallia is quite obscure, because at no time
during normal development is the genital tubercle a paired structure. Reptiles
such as snakes and lizards possess a double penis. Moreover, diphallia could
represent a teratoid structure or a form of incomplete twinning. Still, none of
these explanations is adequate and the wide spectrum of the anomalies cannot be
explained by a single hypothesis.
Signs and symptoms
It is
believed that no cases are identical as signs and symptoms vary for each
patient. It varies from a small accessory penis or duplication of the glans to
complete penile duplication.
Generally,
it is characterized with two or more penis, both are situated side by side and
has equal size, urine passes through both penis, some patient in one penis
only, other patient neither of the penis. Some patient is sterile or incapable
to produce semen, but the penis will erect if stimulated.
The
duplication may be orthotopic or ectopic. Division of the penis may be sagittal
or frontal and symmetric or asymmetric, in shape and size.
The urethra
shows a range of variations, from functioning double urethras to complete
absence of the urethra in each penis. The majority have a single corpus
cavernosum in each organ. The meatus may be normal, hypospadias, or epispadia,
and the scrotum may be normal or bifid. The testes are normal, athropic, or
undescended.
Types
Various classifications
for diphallia exist. One classifies it into four types while a recent
classification is into two
Classifying
Diphallia into four types:
- · Diphallia of the glans alone,
- · bifid diphallia,
- · Complete diphallia.
- · Pseudodiphallia.
Classifying
diphallia into two types (widely accepted):
- · True diphallia; partial duplication or complete duplication.
- · Bifid phallus; partial duplication or complete duplication.
True complete diphallia refers to complete penile
duplication, each with two corpora cavernosa (body of the penis) and a corpus
spongiosum (spongy tissue surrounding the male urethra within the penis). Here
both penises are capable of simultaneous erection and ejaculation.
True Partial diphallia; here the duplicate penis is smaller
or rudimentary, it corresponds to the term “pseudodiphallia,”.
Here the rudimentary or smaller penis may not be capable of erection and
ejaculation)
Bifid phallus; when only one corpus cavernosum (body of the
penis) is present in each penis. Normal erection in both penises occurs here).
Complete
bifid phallus; when the degree of separation is complete to the base of the
shaft
Partial
bifid phallus; when the separation is just to the glans (Tip/cap of the
penis).
Diagnosis
Ultrasound
is used to help confirm the diagnosis. It detects the number of corpora
cavernosum or corpora spongiosum and their accompanying abnormalities. Improved
interpretation of anatomical structures has been made possible with the advent
of magnetic resonance. Imaging also help in decision making during treatment.
Treatment
Several factors
are considered during the treatment of diphallia, these are; medical, ethical and
aesthetic factors.
Treatment
of diphallia depends on the type of diphallia and the associated anomalies. During
treatment of diphallia, it is necessary to individualise each case and also aim
at preserving or achieving erectile function, urinary continence, urinary
stream and cosmesis.
Surgical Excision
of the duplicated noncommunicating penis is reported in many bodies of
literature. Penis reconstruction by joining the corporal bodies in each penis
in a patient with true complete diphallia has also been reported in some
literatures.
Complications
Congenital
defects, sterility, erectile dysfunctions, prostatitis, etc.
Prognosis
Infants
born with diphallia and its related conditions have a higher death rate from
various infections associated with their more complex renal or colorectal
systems.
References
R. Mukunda,
P. S. Bendre, R. G. Redkar, and S. Hambarde, “Diphallus with anorectal
malformation-case report,” Journal of Pediatric Surgery, vol. 45, no. 3, pp.
632–634, 2010
V. C.
Varghese and T. U. Sukumaran, “Penile duplication,” Indian Pediatrics, vol. 41,
no. 11, p. 1166, 2004
H. S. Bhat,
S. Sukumar, T. B. Nair, and C. S. M. Saheed, “Successful surgical correction of
true diphallia, scrotal duplication, and associated hypospadias,” Journal of
Pediatric Surgery, vol. 41, no. 10, pp. e13–e14, 2006.
M. M.
Aboodi and H. A. Al-Jadeed, “Accessory pseudophallus with accessory
pseudoscrotum detected during antenatal sonographic scanning,” Journal of
Ultrasound in Medicine, vol. 24, no. 8, pp. 1163–1166, 2005.
A.
Mirshemirani, F. Roshanzamir, S. Shayeghi, and L. Mohajerzadeh, “Diphallus with
imperforate anus and complete duplication of recto-sigmoid colon and lower
urinary tract,” Iran Journal of Pediatric, vol. 20, no. 2, pp. 229–232, 2010
S.
Priyadarshi, “Diphallus with ectopic bowel segment: a case report,” Pediatric
Surgery International, vol. 21, no. 8, pp. 681–683, 2005.
K. Gyftopoulos,
K. P. Wolffenbuttel, and R. J. M. Nijman, “Clinical and embryologic aspects of
penile duplication and associated anomalies,” Urology, vol. 60, no. 4, pp.
675–679, 2002.
S. Acimi,
“Complete diphallia,” Scandinavian Journal of Urology and Nephrology, vol. 38,
no. 5, pp. 446–447, 2004.
M. E.
Torres, P. J. C. Sanchez, T. A. Aragon, T. V. Camacho, and G. A. Colorado,
“Diphalia,” Revista Mexicana de Urologรญa, vol. 69, no. 1, pp. 32–35, 2009.
Wikipedia
“Diphallia” Wikipedia 2016.
M. C. de
Oliveira, R. Ramires, J. Soares, A. P. Carvalho, and F. Marcelo, “Surgical
treatment of penile duplication,” Journal of Pediatric Urology, vol. 6, no. 3,
pp. 257-e1–257-e3, 2010
P. Tirtayasa,
R. Prasetyo, and A. Rodjani “Diphallia with Associated Anomalies: A Case Report
and Literature Review,” Case Reports in Urology Vol. 2013, Article ID 192960, 2013.