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is a significant concern for physicians. Central j0 t0 V5 a# \# `1 B5 N, K
precocious puberty (CPP), which is mediated9 x! }3 R) B4 M/ B1 |
through the hypothalamic pituitary gonadal axis, has
6 f- S; Q& w9 X. a4 [/ Ka higher incidence of organic central nervous system3 @$ r: V. l) D
lesions in boys.1,2 Virilization in boys, as manifested! D' _! t g/ K4 U- h- {2 L
by enlargement of the penis, development of pubic) ~# V8 v* v4 `* L4 \
hair, and facial acne without enlargement of testi-
$ V! L! H* w7 N4 ucles, suggests peripheral or pseudopuberty.1-3 We) M5 C% k3 A, p% M. d' @. I6 N0 a
report a 16-month-old boy who presented with the
+ Z( m, r: }' H3 U' ` |enlargement of the phallus and pubic hair develop-* s+ R( F: c# l# [9 z ]( P
ment without testicular enlargement, which was due
+ K# N6 [& `; I: R- e9 Bto the unintentional exposure to androgen gel used by# L2 u* z( l3 z+ r! G
the father. The family initially concealed this infor-& c3 w4 C9 ?# s7 y! J
mation, resulting in an extensive work-up for this1 B# q5 z9 v( }% Q5 B
child. Given the widespread and easy availability of
3 U3 U7 s) t( ^& H) x# itestosterone gel and cream, we believe this is proba-3 l- `9 k9 @8 @4 g3 U
bly more common than the rare case report in the- y6 J: m# N8 l: c" A) V* W
literature.42 c& I! ?2 G/ O0 r" M, b+ \
Patient Report1 a2 l( ]4 s8 s5 o. E X2 _
A 16-month-old white child was referred to the
6 J; e' q- {. Q0 Nendocrine clinic by his pediatrician with the concern+ @! }: y4 x2 G# j" E; K
of early sexual development. His mother noticed9 @5 q$ u& T; R; `$ }2 [6 G
light colored pubic hair development when he was
4 d( Q6 ~$ a7 N: H) ~) y5 cFrom the 1Division of Pediatric Endocrinology, 2University of
# k8 H5 j3 R# _0 YSouth Alabama Medical Center, Mobile, Alabama.1 s1 K$ {) e9 {5 J
Address correspondence to: Samar K. Bhowmick, MD, FACE,
7 J" Q, O! V% s: O: eProfessor of Pediatrics, University of South Alabama, College of' e% z" i+ O3 \
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
# X+ t1 \% g% be-mail: [email protected].8 ], a3 t# v/ `7 W) \7 J+ Y
about 6 to 7 months old, which progressively became( w( ?( c1 i1 l1 h3 D; X
darker. She was also concerned about the enlarge-
: ]$ j) R/ ~ G- v# ~% Pment of his penis and frequent erections. The child
# @( X% E( c8 a7 ^3 lwas the product of a full-term normal delivery, with0 c5 I, h+ r3 Y% A; A+ q
a birth weight of 7 lb 14 oz, and birth length of
7 }4 f( V: o$ Z20 inches. He was breast-fed throughout the first year
; A, p I4 F+ A1 gof life and was still receiving breast milk along with& S# ?) O' R/ A' }: B: S* a
solid food. He had no hospitalizations or surgery,
( o) D1 {( b1 L3 Jand his psychosocial and psychomotor development
" v5 ]( [# Z4 m& P# V0 g+ owas age appropriate.
" C# W3 f' G3 Z& a& n" t- V6 e0 z, tThe family history was remarkable for the father,
1 ]. q" O5 e( m+ [% v% Cwho was diagnosed with hypothyroidism at age 16,% ]' i* b6 m3 Z- f
which was treated with thyroxine. The father’s
6 v2 l$ }' i% y! \: m Fheight was 6 feet, and he went through a somewhat
& Y* ~" r0 Q* J/ r" J# @0 l$ learly puberty and had stopped growing by age 14.) R6 o z# ]* K% V
The father denied taking any other medication. The7 s: x9 S$ { f# M* D- h
child’s mother was in good health. Her menarche5 \* x3 v0 T, G3 v- a8 X) B( `
was at 11 years of age, and her height was at 5 feet
9 Q4 x; T1 v# Z/ u4 _! w+ }5 inches. There was no other family history of pre-
- C# r; R: ]: w9 ?% M# rcocious sexual development in the first-degree rela-
M* `7 R) L! N9 y9 ^tives. There were no siblings.5 N' U8 [, g+ K# y' j
Physical Examination
! G+ l6 O% ~- UThe physical examination revealed a very active,
4 X/ B8 q, h c, z6 m! j( [playful, and healthy boy. The vital signs documented
# c: P) T- ~$ J/ ca blood pressure of 85/50 mm Hg, his length was
3 C7 F; d/ d9 B" k/ L8 I6 {, J90 cm (>97th percentile), and his weight was 14.4 kg
+ F. f% I+ A: a' o(also >97th percentile). The observed yearly growth; R8 Y _! v* J0 G' M0 f$ `
velocity was 30 cm (12 inches). The examination of
" p5 l! Y% j9 f5 _" J0 _) Uthe neck revealed no thyroid enlargement.
8 ]2 s; i" s) V) ^8 d: t2 O8 ~The genitourinary examination was remarkable for
# h1 O* H- V) e+ E6 H. Renlargement of the penis, with a stretched length of
! \* J: ~& t4 ~2 u( J/ a' G( C8 o& L$ x8 cm and a width of 2 cm. The glans penis was very well
8 U: X# g" `+ k# w4 |developed. The pubic hair was Tanner II, mostly around; s5 i8 q2 {3 G# |% A
540
5 y0 J9 U5 g. z" l+ t: ~at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 W5 \' m2 Q- x$ h4 ethe base of the phallus and was dark and curled. The
7 u3 }) h! W" o+ x- ttesticular volume was prepubertal at 2 mL each.
; r: ?9 V2 d3 j! DThe skin was moist and smooth and somewhat
; V1 t K, u2 F: ~1 V* poily. No axillary hair was noted. There were no
! Q5 t2 W( p5 v: mabnormal skin pigmentations or café-au-lait spots.
' l$ F6 J, I. L/ x$ l m7 Q* BNeurologic evaluation showed deep tendon reflex 2+. @" W/ u2 J7 U$ h8 _* ]
bilateral and symmetrical. There was no suggestion& H* ~" n0 n1 u
of papilledema.
% Z3 ~" k) r* E( a5 }1 @/ FLaboratory Evaluation* J5 X M5 N4 M3 W+ ^. ^* l
The bone age was consistent with 28 months by# m) A+ O& E" |$ r/ Q" y
using the standard of Greulich and Pyle at a chrono-
) k2 C: i9 v# F9 U' F1 I6 Llogic age of 16 months (advanced).5 Chromosomal
) D) u+ o6 n: r9 ~5 Vkaryotype was 46XY. The thyroid function test
0 [; l; v8 s' S. Eshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
% B$ b$ Q6 k c9 w$ F7 k. |2 hlating hormone level was 1.3 µIU/mL (both normal).
h x- m( E$ \- h: lThe concentrations of serum electrolytes, blood
. H& Y4 d$ i9 m. Uurea nitrogen, creatinine, and calcium all were
8 V, J3 C0 `" b$ E0 _: M# q9 y2 Jwithin normal range for his age. The concentration
; U' F: E; a( t4 b' \2 N% hof serum 17-hydroxyprogesterone was 16 ng/dL# D2 n8 ~; j' f1 p
(normal, 3 to 90 ng/dL), androstenedione was 20
1 p! g: D$ F' E& Ing/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
& ]" f+ O1 [1 f: e/ ]* [8 x! @; Q2 gterone was 38 ng/dL (normal, 50 to 760 ng/dL),# x8 L: ^. d1 l; q
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
8 `1 w- B* ^9 W49ng/dL), 11-desoxycortisol (specific compound S): V# @/ D: D5 V0 s
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-9 z5 |- q; H- v- q+ n
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
) O$ m+ o- g1 l9 dtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),/ c: {. K8 T) [/ n9 l& f3 v
and β-human chorionic gonadotropin was less than8 ~2 T2 |) g% s8 v9 A3 a$ K
5 mIU/mL (normal <5 mIU/mL). Serum follicular
$ L% V5 m- i) \1 Rstimulating hormone and leuteinizing hormone
. _3 E' F+ V/ A) R0 Y) V/ b& _concentrations were less than 0.05 mIU/mL
! k: {1 a3 b- L) F+ ?9 V2 a(prepubertal).- m1 o0 e: p- ^ }9 M5 M# ~
The parents were notified about the laboratory
& ?% q2 |+ ?* Fresults and were informed that all of the tests were" u; k, g& ]3 Z
normal except the testosterone level was high. The2 o/ L) [- ]/ c) L0 G: y9 @ \
follow-up visit was arranged within a few weeks to
6 v' l/ E$ u: @' A7 h8 k2 Hobtain testicular and abdominal sonograms; how-
' y b6 z2 s7 J8 r; \9 Never, the family did not return for 4 months.& a7 U# |" G+ t) ^7 ~" Z [' [# {
Physical examination at this time revealed that the4 b5 c$ a6 M* Q6 F6 B
child had grown 2.5 cm in 4 months and had gained
- z# @6 d/ y" \" E! w0 H" ]6 P% c1 w2 kg of weight. Physical examination remained+ b+ i& H3 |" A; \
unchanged. Surprisingly, the pubic hair almost com-8 H! P3 j1 H; c) o' y$ _7 O: Q% {
pletely disappeared except for a few vellous hairs at
" G9 o6 O( c! V; b* W" f0 j# Mthe base of the phallus. Testicular volume was still 2. y, X/ T/ X% O
mL, and the size of the penis remained unchanged.
5 K4 I3 F" R0 _! l, B# T q+ v% |The mother also said that the boy was no longer hav-! ?5 U& h; o6 f g% m2 B
ing frequent erections.4 q7 X U5 X/ `( V; M) C: X
Both parents were again questioned about use of/ M# V5 Z! ^$ i; n, N
any ointment/creams that they may have applied to, z. S8 ^3 z' h$ { E- u, Z% B
the child’s skin. This time the father admitted the
K8 e3 k$ n! J( l) D# v4 ETopical Testosterone Exposure / Bhowmick et al 5417 d; H8 S; K$ I* n6 w
use of testosterone gel twice daily that he was apply-- I8 O" I5 L5 A1 ^' U
ing over his own shoulders, chest, and back area for) I* g& d- j* z8 u4 u
a year. The father also revealed he was embarrassed4 I- N: B/ Z! y0 |) }4 {
to disclose that he was using a testosterone gel pre-
6 g9 L( r+ V' Nscribed by his family physician for decreased libido
7 [. A, H1 y9 t7 l- N2 usecondary to depression.
( d- T4 i9 Q* t/ c% g& BThe child slept in the same bed with parents.
0 j/ m/ f4 @" u; P6 P3 }! N+ nThe father would hug the baby and hold him on his
/ L- B& j4 [1 R9 t& S- a; G zchest for a considerable period of time, causing sig-
+ W0 d4 G5 r, a1 n4 S' L/ A# L3 ?nificant bare skin contact between baby and father.
7 x" N; \0 q5 l4 nThe father also admitted that after the phone call,
4 c; n4 Z; ?4 d, Q# e7 q' Zwhen he learned the testosterone level in the baby
; O3 i+ B2 o8 P4 L/ P% kwas high, he then read the product information0 i+ U9 U8 r! n+ [/ p, K' i) x* @1 g
packet and concluded that it was most likely the rea-; W5 T+ z6 [5 j; t1 |- Z) e
son for the child’s virilization. At that time, they
- ~7 f6 H6 b* A# G' Idecided to put the baby in a separate bed, and the: A5 L6 ~8 q. D+ {/ }
father was not hugging him with bare skin and had
% D1 t3 R$ J" p; f1 kbeen using protective clothing. A repeat testosterone
% I/ S1 n8 N( J% |test was ordered, but the family did not go to the
; R! m6 u& B- Rlaboratory to obtain the test., V* u1 t6 Z- B) O7 y/ _+ _" h
Discussion
7 H- K1 t/ v; s Z" lPrecocious puberty in boys is defined as secondary% c4 X% m" C7 |" j2 I) ~0 U" @* O: r
sexual development before 9 years of age.1,4; B% p5 _( ]8 A+ R+ g" C
Precocious puberty is termed as central (true) when! E$ U/ _7 P* h, b
it is caused by the premature activation of hypo-' F% ?) w% z: P2 J" T, [
thalamic pituitary gonadal axis. CPP is more com-
% T$ @& `" v6 C) H* k4 {mon in girls than in boys.1,3 Most boys with CPP
_/ d$ d1 _& _ @$ cmay have a central nervous system lesion that is
! a0 D; `$ u7 mresponsible for the early activation of the hypothal-+ C5 B4 k& X: |- I) d8 _
amic pituitary gonadal axis.1-3 Thus, greater empha-
8 l8 [. F5 H+ \# U" fsis has been given to neuroradiologic imaging in
7 \7 E8 F; J( c% B7 [/ lboys with precocious puberty. In addition to viril-9 q8 z7 p" ?# p7 A' u3 w5 Y2 _
ization, the clinical hallmark of CPP is the symmet-
. ?" Q" |! ^1 y" A1 U5 srical testicular growth secondary to stimulation by
% ^6 p% A8 q+ b9 Q! A( ?gonadotropins.1,3# u& F; k7 E. W5 x6 _% b
Gonadotropin-independent peripheral preco-
0 X. j3 I) Z$ ?/ h0 f6 \# W9 T& rcious puberty in boys also results from inappropriate
+ N( C0 v( ?& A% Fandrogenic stimulation from either endogenous or
8 P+ F5 q( q% n, B/ oexogenous sources, nonpituitary gonadotropin stim-
5 R) E4 a+ m5 Q% {4 g1 u2 rulation, and rare activating mutations.3 Virilizing
7 Q' L1 d+ H) A$ z) acongenital adrenal hyperplasia producing excessive
; g; G: g; n3 y& v5 x+ ? oadrenal androgens is a common cause of precocious* h, d( @4 Q5 N9 F- V! J
puberty in boys.3,4) E7 B$ u1 k! b
The most common form of congenital adrenal
* z7 J7 i* }' D+ E$ q' Thyperplasia is the 21-hydroxylase enzyme deficiency.
' M9 Q' v: d, a8 n" vThe 11-β hydroxylase deficiency may also result in- n( U, k/ h3 b4 U
excessive adrenal androgen production, and rarely,2 I2 R2 ? r. b6 T8 g
an adrenal tumor may also cause adrenal androgen: ]) m7 v. H& }/ S7 n; n
excess.1,3
- R2 r9 c2 n$ ~at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from* G3 z& F+ O, J4 k* a% [3 C
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007& H9 H* n3 a" Q
A unique entity of male-limited gonadotropin-
2 a) j2 f5 y0 F- F, Z, q, ]2 H$ Q# cindependent precocious puberty, which is also known
/ ^3 i$ t9 f% i5 i0 }1 ?1 jas testotoxicosis, may cause precocious puberty at a
, z+ J$ t$ v. u! @4 J6 `very young age. The physical findings in these boys
# F, {, }3 S$ e j. zwith this disorder are full pubertal development,! K6 c7 k# v0 @3 f9 B- ~9 K
including bilateral testicular growth, similar to boys
9 g, B* T1 z0 N: u, N8 twith CPP. The gonadotropin levels in this disorder( A" C3 x* a% r0 V% d2 J* ~- y
are suppressed to prepubertal levels and do not show
$ Z9 @( K7 g+ `/ d4 ^pubertal response of gonadotropin after gonadotropin-2 Y9 X3 p) Y4 X; O: ?$ q6 E
releasing hormone stimulation. This is a sex-linked5 x" e8 F$ ]2 T6 L
autosomal dominant disorder that affects only% h% n* y1 E) `( C+ M( u
males; therefore, other male members of the family
5 c& ~# C0 w z F) @' }% F: _8 {9 Vmay have similar precocious puberty.3
. G) o* w$ u1 d; q" ]In our patient, physical examination was incon-% m- L3 U4 P8 Y
sistent with true precocious puberty since his testi-. \. ^( A/ f8 N3 l4 ]2 S
cles were prepubertal in size. However, testotoxicosis
; p8 E' ?. b4 k M. N/ Lwas in the differential diagnosis because his father' n% Z) ]8 z6 X- u1 s
started puberty somewhat early, and occasionally,
! V) J8 g, g1 Z0 \& q" r. b8 U7 xtesticular enlargement is not that evident in the
) U. M% a0 _& Q, S5 rbeginning of this process.1 In the absence of a neg-
) l! U- l; g* w8 C' Q7 Vative initial history of androgen exposure, our5 F' m2 ]( u+ W6 k; Z
biggest concern was virilizing adrenal hyperplasia,0 @& J; q' S" O: Y ]2 }( T
either 21-hydroxylase deficiency or 11-β hydroxylase
) b% H' d' ?5 T* |7 Wdeficiency. Those diagnoses were excluded by find-
" D+ x) K8 H& Z; ming the normal level of adrenal steroids.
) Y) o; F% f i, v) r5 I. EThe diagnosis of exogenous androgens was strongly
/ L" N4 N' {+ q. }9 Ssuspected in a follow-up visit after 4 months because8 u: T0 G, @5 k( j& t6 J) ^
the physical examination revealed the complete disap-
, b) u' B. `8 H9 u: z+ P) Ppearance of pubic hair, normal growth velocity, and4 ], `( {7 a, U# Y: c7 U: E0 g
decreased erections. The father admitted using a testos-# U9 |9 o+ q% q1 D2 q
terone gel, which he concealed at first visit. He was
8 q% X6 E. i) b7 } N; Zusing it rather frequently, twice a day. The Physicians’
0 f% [% F4 c, L% V% XDesk Reference, or package insert of this product, gel or
- e. M; N& t j$ xcream, cautions about dermal testosterone transfer to
3 v) {2 [/ F( D1 ~! J3 Sunprotected females through direct skin exposure.& ]3 U$ G2 ^! |& m- z9 Y
Serum testosterone level was found to be 2 times the
7 i! Q! R" `$ V2 bbaseline value in those females who were exposed to- D( \3 O: U0 u1 L
even 15 minutes of direct skin contact with their male6 y: c: i L4 a5 S
partners.6 However, when a shirt covered the applica-& P8 a+ k7 Q" m/ u) X
tion site, this testosterone transfer was prevented.7 V( h5 p0 J& G' ?# I
Our patient’s testosterone level was 60 ng/mL,
+ S) [& N/ N2 }3 ~" Pwhich was clearly high. Some studies suggest that3 V/ ^7 \/ O! L# M4 c, M+ C
dermal conversion of testosterone to dihydrotestos-
6 g" \. h+ S! [: D {, sterone, which is a more potent metabolite, is more% A* A) E% b/ F
active in young children exposed to testosterone7 w& }1 C; S6 n; U& I* H y
exogenously7; however, we did not measure a dihy-
* [) K# j8 N3 T; E" }drotestosterone level in our patient. In addition to
1 i. @+ V1 g/ nvirilization, exposure to exogenous testosterone in9 L( }1 i6 y/ c8 s/ z9 |
children results in an increase in growth velocity and g2 l5 h+ C) b' ?+ {
advanced bone age, as seen in our patient.' P4 s% \. P/ h3 d
The long-term effect of androgen exposure during! O2 s3 d. R$ z A7 _
early childhood on pubertal development and final
. }' {) i |* c6 }adult height are not fully known and always remain c/ U" {) @1 v5 V
a concern. Children treated with short-term testos-
) {+ D: h6 _; ~( g, ], B5 D+ h" eterone injection or topical androgen may exhibit some2 O/ x8 ~3 f, L, T
acceleration of the skeletal maturation; however, after/ G* S9 o0 `7 s F; B+ g
cessation of treatment, the rate of bone maturation
2 U4 P( a, k5 n7 n$ A sdecelerates and gradually returns to normal.8,95 Y# e, j% x* _6 x; b
There are conflicting reports and controversy+ m( V0 V! a' ^, E
over the effect of early androgen exposure on adult
! Q* } i" k+ C' J+ gpenile length.10,11 Some reports suggest subnormal! B' B, d( l- e
adult penile length, apparently because of downreg-" {' \. Z* w/ {7 D$ i# n X) W
ulation of androgen receptor number.10,12 However,
! t" h( F) K7 Z$ ASutherland et al13 did not find a correlation between
7 b/ }2 B4 d- J, bchildhood testosterone exposure and reduced adult
& T$ G) |# J! d- _, zpenile length in clinical studies.& X6 Z+ f; J" X% {9 Q" R8 y
Nonetheless, we do not believe our patient is
% y: G( V5 f5 g6 y! Q' C, ]; zgoing to experience any of the untoward effects from
) G) R1 C9 Z2 _( G7 ~8 Htestosterone exposure as mentioned earlier because
( |9 S; q. _8 i. v: c# N9 f9 dthe exposure was not for a prolonged period of time.
3 o0 `: p; o: Y2 m4 MAlthough the bone age was advanced at the time of5 z& H+ L% V3 b6 @
diagnosis, the child had a normal growth velocity at
& G' O3 u+ ~: P6 q# }the follow-up visit. It is hoped that his final adult+ A8 Y! |: V/ S. U2 @+ m
height will not be affected. Z* H! t, O, l
Although rarely reported, the widespread avail-
/ ^5 a$ ^$ ]: d- i7 F$ Cability of androgen products in our society may
G b3 W0 |4 G; d- `+ Zindeed cause more virilization in male or female% s, c# ~% @2 g2 l4 V$ |
children than one would realize. Exposure to andro-
! x7 n6 V( Q2 L2 ~( qgen products must be considered and specific ques-0 C, }6 d P) \, o
tioning about the use of a testosterone product or
" v5 S# V- [! Ggel should be asked of the family members during) t5 r) T8 _% o3 ^. ~" G
the evaluation of any children who present with vir-
! F* J4 H t; x5 Gilization or peripheral precocious puberty. The diag-
- Y# D( X7 I/ q. w& [/ ?& _1 V: p' onosis can be established by just a few tests and by; Y8 t- T' {4 |
appropriate history. The inability to obtain such a: Y* S8 X3 E8 i
history, or failure to ask the specific questions, may2 c9 g+ _1 E3 n; O! u9 {; `9 `! X
result in extensive, unnecessary, and expensive
/ |- A4 Y8 _' \investigation. The primary care physician should be% O) Q7 T/ r" P) l4 @
aware of this fact, because most of these children0 v5 m8 f$ G+ H
may initially present in their practice. The Physicians’6 ?- u5 D2 j4 I7 Y) m. M, l/ I9 L
Desk Reference and package insert should also put a, f% D; |3 H' P( g) D: U
warning about the virilizing effect on a male or
0 ^4 s4 D- j( w" T6 _7 b8 _female child who might come in contact with some-
. e0 R* \* ], t2 k" O. R3 Wone using any of these products.
; w; w" `# S0 P# C3 n# CReferences
q9 d- K9 G( d1. Styne DM. The testes: disorder of sexual differentiation
, a. Q6 J; K6 k0 C% x' Fand puberty in the male. In: Sperling MA, ed. Pediatric
. p5 c) Y( i$ m( ^- WEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;0 B/ ~* v8 P# Q
2002: 565-628.& F* y+ R, {# _4 [% }8 c ?
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
. P" \ T5 a% R. A0 Upuberty in children with tumours of the suprasellar pineal
0 [0 A, ^ L9 F' u& `7 t# Cat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from& l, C8 F. S% i* v7 s1 b3 G" y
Topical Testosterone Exposure / Bhowmick et al 5430 J; O P" U* v) Q4 ^0 |' c
areas: organic central precocious puberty. Acta Paediatr.' K6 ~1 {, O2 Q& x
2001;90:751-756.
# K& Q. i" y) Z* F3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
' W- h5 ?, @* C: a& r5 L! fPediatric Endocrinology. 4th ed. New York, NY: Marcel
+ @0 U! Z" k8 |; J, h! W- aDekker Inc; 2003:211-238.! m4 u7 b$ m3 `7 K- P( O F
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
& V% @$ j- |. o$ d3 K" gdevelopment in a two-year-old boy induced by topical
# [3 C4 X5 d9 E, j' D) o5 \) n1 ]exposure to testosterone. Pediatrics. 1999;104:e23.7 W- _) C, J9 w( L: J2 Y- L* Z- r
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
, M c+ g! r4 sSkeletal Development of the Hand and Wrist. 2nd ed.
* ?7 _' Y3 f% x, X2 @ G$ J( bStanford, CA: Stanford University Press; 1959.
. }5 u; V. j$ U, S/ a* D6. Physicians’ Desk Reference. Androgel 1% testosterone,
& h! l/ W+ f$ E" v( TUnimed Pharmaceutical Inc. Montvale, NJ: Medical
1 ?) }% H% v( B# N/ \Economics Company, Inc; 2004:3239-3241.8 h( P$ L# k8 d# L: ~
7. Klugo RC, Cerny JC. Response of micropenis to topical
# h! D! h& ^+ l4 N; d6 Ltestosterone and gonadotropin. J Urol. 1978;119:" {1 ?+ j8 X+ T+ A3 ^5 _/ Z i
667-668., o) n3 p" b+ N* ?
8. Guthrie RD, Smith DW, Graham CB. Testosterone
8 g2 O2 t; [" ftreatment for micropenis during early childhood. J Pediatr.' [% M! q4 L' h$ P, P' X
1973;83:247-252.
N$ A p. Q/ W9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone: k5 D, u( x7 m/ O
therapy for penile growth. Urol. 1975;6:708-710.
0 x8 k2 h0 F3 ], T; _% R10. Husmann DA, Cain MP. Microphallus: eventual phallic v# }2 Q/ |% u8 X
size is dependent on the timing of androgen administra-0 v/ V& N$ @# S- d
tion. J Urol. 1994;152:734-739.
0 B$ k( E0 @7 Q4 E+ V5 l11. McMahon DR, Kramer SA, Husmann DA. Micropenis:+ k" Y/ z0 F1 A& L6 v
does early treatment with testosterone do more harm
3 n9 ?+ x% q. E* f; xthan good? J Urol. 1995;154:825-829.
$ L9 p: w; H. ]& x2 |1 @" z+ C6 B4 l12. Takane KK, George FW, Wilson JD. Androgen receptor
9 ^- n5 k. {9 q! b; oof rat penis is down-regulated by androgen. Am J Physiol.
+ |2 g9 E& @9 G1 D2 Q; j) I8 g7 q# |1990;258:E46-E50.3 ]" D! X$ q/ n9 C) M5 B
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
/ d- o) z& H( O6 d2 Qof prepubertal androgen exposure on adult penile7 b1 e+ M; b* w5 |* g1 ?, H+ {
length. J Urol. 1996;156:783-787. |
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