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is a significant concern for physicians. Central" z, P7 B4 L! i0 |3 Q! Z# `9 M
precocious puberty (CPP), which is mediated5 c5 z: U8 W# T' L# z( }; {( g4 ~
through the hypothalamic pituitary gonadal axis, has* \/ q) N8 u: R* O( a
a higher incidence of organic central nervous system5 S9 X! l& @$ k. k
lesions in boys.1,2 Virilization in boys, as manifested
4 |! e/ B5 u, w4 M+ qby enlargement of the penis, development of pubic( E ]3 ]/ Q6 W" a& w
hair, and facial acne without enlargement of testi-+ V% P0 _$ [3 Q3 Z. b7 K, c$ W
cles, suggests peripheral or pseudopuberty.1-3 We7 G0 N" X* A \# H" k0 v
report a 16-month-old boy who presented with the2 c) H X7 Y5 w: [( Y, g
enlargement of the phallus and pubic hair develop-
3 K% k0 C# y) p; W' oment without testicular enlargement, which was due+ P/ ?+ N" e- d" ?& C
to the unintentional exposure to androgen gel used by+ A+ r: g. ~0 A
the father. The family initially concealed this infor-
/ N" h1 L$ ?; V, _mation, resulting in an extensive work-up for this
# q% I& F% i5 E0 h3 wchild. Given the widespread and easy availability of
: x Q3 e# Y S% {1 b/ ltestosterone gel and cream, we believe this is proba-! M2 h3 ~8 r, Q" p/ B1 F# N
bly more common than the rare case report in the0 C* h; o7 t* k, O0 ^7 e
literature.4
" p- G+ x: T0 N5 d+ Q& }Patient Report
, u6 d6 u' F/ X1 Y5 ~- Y) }9 A7 VA 16-month-old white child was referred to the
) E, S; e' U% P, u# w- Q$ i1 gendocrine clinic by his pediatrician with the concern4 `3 n# y$ a- D2 Q- B7 u& W: w
of early sexual development. His mother noticed& J) ~% k9 U" w9 J# ]8 L* I
light colored pubic hair development when he was
* o6 D; I( t' [From the 1Division of Pediatric Endocrinology, 2University of( s* x7 C M$ F
South Alabama Medical Center, Mobile, Alabama.
$ H; n7 K1 f& C' I kAddress correspondence to: Samar K. Bhowmick, MD, FACE,; P8 o9 x8 L" P0 p
Professor of Pediatrics, University of South Alabama, College of% u2 x7 v, @9 i r! x1 m; D
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
8 T9 V/ u5 G3 T' {' k7 {e-mail: [email protected].
5 {+ q3 ]. x) Q: E5 Oabout 6 to 7 months old, which progressively became
9 \8 J, e, x. B; }8 G3 p1 gdarker. She was also concerned about the enlarge-/ [5 |5 c! n, U7 u/ c' F
ment of his penis and frequent erections. The child
, H; ]2 E' y5 Jwas the product of a full-term normal delivery, with
% i s' u$ K8 h7 M+ La birth weight of 7 lb 14 oz, and birth length of* ?$ q2 v: v2 G
20 inches. He was breast-fed throughout the first year/ ?1 V+ V) E1 M3 R& f! W
of life and was still receiving breast milk along with" e/ F4 V" }& x) h. [1 r& y$ _
solid food. He had no hospitalizations or surgery,
2 G# Q( e+ _8 V6 O; |5 w6 Vand his psychosocial and psychomotor development8 L1 p0 T' l5 D% s
was age appropriate.* |" m7 E, k. z: H
The family history was remarkable for the father,% p3 K- a$ }) l2 Y; X
who was diagnosed with hypothyroidism at age 16," ~8 A" z. s. p* c
which was treated with thyroxine. The father’s% {5 H c" a O4 G
height was 6 feet, and he went through a somewhat
( x& K2 i/ f5 Bearly puberty and had stopped growing by age 14.
+ N! t/ |% d. Q( b2 FThe father denied taking any other medication. The
* j8 N% A% Q: h6 D0 b: m g4 f* vchild’s mother was in good health. Her menarche$ \+ ?% J/ N' O8 y
was at 11 years of age, and her height was at 5 feet F. N5 y T- W: f
5 inches. There was no other family history of pre-
" @; e( ?5 h1 b$ @cocious sexual development in the first-degree rela-
^; M, p9 L9 _2 D. G5 ztives. There were no siblings.+ n% u5 s4 f( q% j3 d% j
Physical Examination% z" L) k, Y7 G# L
The physical examination revealed a very active,
d; f, d' J( D7 qplayful, and healthy boy. The vital signs documented }- t: F; R1 l! P- k
a blood pressure of 85/50 mm Hg, his length was
6 k! \$ g& \" b% l$ S90 cm (>97th percentile), and his weight was 14.4 kg: W$ P- e5 v5 [
(also >97th percentile). The observed yearly growth7 M- x( y# y, d6 W/ m2 Q
velocity was 30 cm (12 inches). The examination of
( C; y5 Q+ l' O U% }/ l( gthe neck revealed no thyroid enlargement.% R4 a* q& g- @8 r0 ?- w
The genitourinary examination was remarkable for
9 K& ?# e/ V; Tenlargement of the penis, with a stretched length of
: |. ]& c- ^+ @! i* O2 ]8 cm and a width of 2 cm. The glans penis was very well
8 D# k+ b( q& Kdeveloped. The pubic hair was Tanner II, mostly around
2 C6 e& s, S& P6 a+ u9 G540
! l. e9 k; y- ]: `! I# z i. G% J% W; lat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
( R. |: O9 ~# b; n5 `" bthe base of the phallus and was dark and curled. The# P- r9 J) x8 `: U- {# ]+ ?% A
testicular volume was prepubertal at 2 mL each.( O# i4 {$ q; Q8 F$ ~/ i- q
The skin was moist and smooth and somewhat6 R9 I6 c( t! e2 h0 g
oily. No axillary hair was noted. There were no' \; I4 F' G8 y9 A* x2 k
abnormal skin pigmentations or café-au-lait spots.
E" H! q# L# |. E. |, W) FNeurologic evaluation showed deep tendon reflex 2+
, i! Q7 j t: T3 Z9 i6 z' J6 n9 A* x+ o( `bilateral and symmetrical. There was no suggestion
' W, T( I" S$ tof papilledema.
4 H& b: Q+ V/ fLaboratory Evaluation: q- }9 o* h9 U6 |2 R- w W; e; j
The bone age was consistent with 28 months by
; K* G) W' E- d! O4 J" I, U& ]9 Cusing the standard of Greulich and Pyle at a chrono-
# I# g4 W6 j) ^logic age of 16 months (advanced).5 Chromosomal
o' @; M+ c6 ?. V7 [karyotype was 46XY. The thyroid function test
6 Q3 z" ~* `( z' |5 nshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
; v9 c: \0 e5 n, Klating hormone level was 1.3 µIU/mL (both normal).& b: l% P3 n* g/ V+ F
The concentrations of serum electrolytes, blood
2 y* ]- C" H2 A* o; x4 ?urea nitrogen, creatinine, and calcium all were: j% }! @% q( t9 w
within normal range for his age. The concentration) t1 V9 b) N+ f; a: T
of serum 17-hydroxyprogesterone was 16 ng/dL0 r+ F9 _: ?& j& I, v5 t- Q
(normal, 3 to 90 ng/dL), androstenedione was 20
" E+ C( u% `' V7 Z2 W& Mng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-! V9 |+ @/ P0 a: ]; Q Y2 z2 q
terone was 38 ng/dL (normal, 50 to 760 ng/dL),# N1 O& |+ i( _3 Y
desoxycorticosterone was 4.3 ng/dL (normal, 7 to G; ^( t$ m6 g3 ~
49ng/dL), 11-desoxycortisol (specific compound S); L- V) @% A7 m) D, i) E9 o8 j2 g! d4 ?5 K7 h
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
; c ], G9 I5 I) o9 v8 ]* \tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
& ?! _3 [4 |" w/ e. ^6 Ktestosterone was 60 ng/dL (normal <3 to 10 ng/dL),. ]& Z) k1 d0 k$ B6 C- I [) P2 o
and β-human chorionic gonadotropin was less than
# R8 B* ]2 h0 W, Z X# J, C5 mIU/mL (normal <5 mIU/mL). Serum follicular
6 v$ _" E$ W$ g' n+ S; n1 ~. ~3 Lstimulating hormone and leuteinizing hormone
8 ^7 {& R5 ^- P4 g9 F" t2 lconcentrations were less than 0.05 mIU/mL
" e! ?5 T& O d( T. `; b, u(prepubertal).
& R4 A3 q7 g1 Q# P- {The parents were notified about the laboratory
8 w" s+ ?4 y" {# }% _5 z- w' [results and were informed that all of the tests were
$ R6 Y( K5 O" y0 x) A/ s( pnormal except the testosterone level was high. The
9 ]# G5 p% }8 b( m7 n: L a5 nfollow-up visit was arranged within a few weeks to, [2 D9 f! Q3 ?3 h- N" ~8 B9 ]
obtain testicular and abdominal sonograms; how-
! e& `! y. p6 X# w3 x) g3 E5 N3 Yever, the family did not return for 4 months.
2 u. ^/ C; O& ]- Z% [. ^Physical examination at this time revealed that the
, z& ]) F; }" Nchild had grown 2.5 cm in 4 months and had gained
+ Q& C8 G6 r A7 w6 h7 w2 kg of weight. Physical examination remained
* M E$ L6 g& ^3 W7 Sunchanged. Surprisingly, the pubic hair almost com-5 Z+ r8 {2 Y5 p# d4 A, V" m
pletely disappeared except for a few vellous hairs at
' l3 {7 o! \5 y3 tthe base of the phallus. Testicular volume was still 26 J& S7 H( a2 I( F+ O8 F" ?
mL, and the size of the penis remained unchanged.
# w$ C5 G5 o; O% g( EThe mother also said that the boy was no longer hav-
1 k8 s& Y% i- X [' r+ N. \2 eing frequent erections.5 r3 V) i9 G2 ]; _
Both parents were again questioned about use of+ v# `) K# F: ?: k; O. C
any ointment/creams that they may have applied to0 F' G% m% G4 L9 P) e3 p# I
the child’s skin. This time the father admitted the
$ B, j$ J2 K% P( A; H8 K4 yTopical Testosterone Exposure / Bhowmick et al 541: j0 H/ q; B6 I% i& g% T9 j
use of testosterone gel twice daily that he was apply-
! U% Q Z* d2 |9 U' p2 Ging over his own shoulders, chest, and back area for
7 Z, R/ e r) ?9 Wa year. The father also revealed he was embarrassed
) X7 ?/ d. Z8 |' ?* Vto disclose that he was using a testosterone gel pre-
, N* V$ F) U- q& z9 mscribed by his family physician for decreased libido
: C4 f/ {& N3 y; \secondary to depression.% w# d0 V- n. \
The child slept in the same bed with parents.
% M5 f( ]# J. `7 [: Q$ dThe father would hug the baby and hold him on his) L& v: E Y0 t1 h: c& [7 B$ v8 p
chest for a considerable period of time, causing sig-% A, Q/ t5 A+ ~' D) g- h
nificant bare skin contact between baby and father.
2 d3 Q( x; v) @' g$ \- t% c) m+ iThe father also admitted that after the phone call,9 T! R* t0 H. V
when he learned the testosterone level in the baby
% I7 g, n+ ~4 Twas high, he then read the product information& u# o' G/ {" W. t8 S) U' j ?
packet and concluded that it was most likely the rea-2 z; K; G8 }+ n. s, c/ K3 I
son for the child’s virilization. At that time, they9 \% W% a" U9 y# w, D% T0 e) J* ~
decided to put the baby in a separate bed, and the, A$ G" K, Y0 Y9 _. `/ t7 ~
father was not hugging him with bare skin and had
k$ T1 S% m% m8 k0 J- ?. {been using protective clothing. A repeat testosterone6 g9 a1 C+ R! ~2 \# N+ a7 G
test was ordered, but the family did not go to the
7 J5 t7 b0 Y: s klaboratory to obtain the test./ ^3 j; J, Y% n2 X1 y
Discussion
% H/ \! Q: k5 q" KPrecocious puberty in boys is defined as secondary
1 ?' @" t* T7 J! F' d5 l psexual development before 9 years of age.1,4
; |" M3 ^+ d5 D j6 zPrecocious puberty is termed as central (true) when8 J& f) K* S& Q5 W. k! M/ }" E3 D
it is caused by the premature activation of hypo-- [, ^, }0 z3 i$ }5 ~( T- ^; W: {
thalamic pituitary gonadal axis. CPP is more com-
/ C5 p- Y$ E& [% x5 r3 ?; z; p" Tmon in girls than in boys.1,3 Most boys with CPP% V n1 c6 ?0 M1 N
may have a central nervous system lesion that is
" j1 o8 J" \7 C `, hresponsible for the early activation of the hypothal-
8 c$ n9 Y% m: G& t$ k a: Z- Wamic pituitary gonadal axis.1-3 Thus, greater empha-
8 Z& l/ D# e; ^sis has been given to neuroradiologic imaging in$ j/ N1 r1 I! \0 b% v' A( ?
boys with precocious puberty. In addition to viril- s- |6 X9 ~4 N( x
ization, the clinical hallmark of CPP is the symmet-
B5 r0 S- C# |* c6 brical testicular growth secondary to stimulation by) d+ @8 y! q+ V( E
gonadotropins.1,3
- @8 h4 _( b4 M3 o2 Q$ T+ tGonadotropin-independent peripheral preco-) g7 {" X% L' g) ]. k: e3 T
cious puberty in boys also results from inappropriate
' D7 E |9 b* }! @4 ~* |androgenic stimulation from either endogenous or: }/ N, O( A! L
exogenous sources, nonpituitary gonadotropin stim-) r( q' J& t9 _& s, m
ulation, and rare activating mutations.3 Virilizing
- H; H1 }7 [" ^/ \congenital adrenal hyperplasia producing excessive9 b& k3 ]5 h- u9 G: J
adrenal androgens is a common cause of precocious
+ D6 Y$ j' B$ I$ o1 gpuberty in boys.3,4
6 p) ~$ c! A% C3 W* nThe most common form of congenital adrenal
. D1 B4 c) i" P; t- mhyperplasia is the 21-hydroxylase enzyme deficiency.' p- c7 l4 S* \: ?% q; L. F
The 11-β hydroxylase deficiency may also result in
5 C2 K+ H6 G5 \2 Nexcessive adrenal androgen production, and rarely,
3 J/ [/ q; M1 j# @/ \& E" Pan adrenal tumor may also cause adrenal androgen
- `5 M, |0 d! N- i. W0 P4 p/ F& g K+ u. ]excess.1,3! b2 a4 ? f; d. I6 w
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from0 S$ G% ~3 y; Z* @
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
) w! l6 o; P# wA unique entity of male-limited gonadotropin-
5 \* g& M8 F# B( C/ g" w! }* lindependent precocious puberty, which is also known: C6 n7 K; ^+ z1 f
as testotoxicosis, may cause precocious puberty at a
' ], Y t! o8 @( _very young age. The physical findings in these boys7 H9 x8 K& y( F8 }! a8 {# C
with this disorder are full pubertal development,
0 n: P. G4 @+ X: kincluding bilateral testicular growth, similar to boys) ^ O6 ^8 @) ~; X6 {
with CPP. The gonadotropin levels in this disorder
- W! \7 `0 B8 {1 \3 kare suppressed to prepubertal levels and do not show
9 x9 _6 Z! ]3 s3 G6 @pubertal response of gonadotropin after gonadotropin-
( V& U$ P% B7 M/ [releasing hormone stimulation. This is a sex-linked5 N1 g" j. L! B* P$ T1 ?1 @5 d7 ^
autosomal dominant disorder that affects only
5 m! a0 L5 M& b) emales; therefore, other male members of the family
1 {( P, J9 x* s( ?! f; A2 ~2 Gmay have similar precocious puberty.3+ B2 }& E! f e: w0 U/ z+ B
In our patient, physical examination was incon-( v6 q% e7 C6 n, U
sistent with true precocious puberty since his testi-0 b+ ~. J+ [8 B+ F+ f8 V7 z
cles were prepubertal in size. However, testotoxicosis& }0 @7 \, }5 h/ y7 ?! ^
was in the differential diagnosis because his father
& s9 n* T3 h: h& s* F' r: Sstarted puberty somewhat early, and occasionally,3 X# q; \9 \: z, E( y- w
testicular enlargement is not that evident in the+ ]; [* U/ j& e& i* u5 s
beginning of this process.1 In the absence of a neg-( p3 Z6 m5 ~7 _
ative initial history of androgen exposure, our
9 y2 B# Y ]5 ybiggest concern was virilizing adrenal hyperplasia,. d6 J6 ?. t; `2 J& h. j
either 21-hydroxylase deficiency or 11-β hydroxylase
% J0 C9 M8 i6 q9 Q& zdeficiency. Those diagnoses were excluded by find- Y7 ~) M& O5 |0 p* d4 S; r
ing the normal level of adrenal steroids.- k+ x, i' @) H
The diagnosis of exogenous androgens was strongly: _7 M3 J/ `2 v
suspected in a follow-up visit after 4 months because6 W9 h) L( V# F' S
the physical examination revealed the complete disap-) m. E" q; i Y8 a
pearance of pubic hair, normal growth velocity, and
7 J( N$ E4 I5 a* ~% Z3 n6 _! udecreased erections. The father admitted using a testos-3 J# Y- I( \- m+ u
terone gel, which he concealed at first visit. He was& P& |4 T/ L7 y
using it rather frequently, twice a day. The Physicians’
6 x1 |9 O/ e& Q. b. @# Z; A3 L+ rDesk Reference, or package insert of this product, gel or, ?# u5 v9 N! Q2 ?7 d
cream, cautions about dermal testosterone transfer to
9 A7 o* `( S$ z$ D# U! ]3 y; {unprotected females through direct skin exposure.8 F3 p+ J- j' @7 X" P+ Z. b
Serum testosterone level was found to be 2 times the
: x g* j/ p1 }: T {baseline value in those females who were exposed to: J5 | K1 R f; F
even 15 minutes of direct skin contact with their male" v# D, j* d7 n0 D
partners.6 However, when a shirt covered the applica-
: U4 x& `8 u Ption site, this testosterone transfer was prevented., C3 H! c: N! X& `
Our patient’s testosterone level was 60 ng/mL,
( R% ~+ V: `- ^which was clearly high. Some studies suggest that5 l' L* r: z: o( j, W1 |' T
dermal conversion of testosterone to dihydrotestos-4 G3 I F; @ y4 O t" F
terone, which is a more potent metabolite, is more. l0 ~" u2 _1 D. [. p& J& z: K
active in young children exposed to testosterone
p. j0 W7 c: x" o! Wexogenously7; however, we did not measure a dihy-9 L, w7 _6 k. Y' i8 Q# [2 I8 d
drotestosterone level in our patient. In addition to
3 l2 {% y/ T; O6 M" o! nvirilization, exposure to exogenous testosterone in7 _% t8 b8 w9 ]! G
children results in an increase in growth velocity and: F( B% C4 [/ A
advanced bone age, as seen in our patient.$ c8 E9 q3 N u6 N" F: t% w7 U; u& L% e t
The long-term effect of androgen exposure during
0 Z! Y" [9 r3 @1 r; }2 b1 `early childhood on pubertal development and final, e" n9 Q% o4 N( W9 ~% K
adult height are not fully known and always remain. I6 v! W; i& Z& v0 c* g+ v
a concern. Children treated with short-term testos-8 n$ m) w; O. x* `# |7 `& C
terone injection or topical androgen may exhibit some1 u7 }, A/ T8 {- X2 t/ c8 X
acceleration of the skeletal maturation; however, after
2 d; }, V7 i( O9 S# R" }cessation of treatment, the rate of bone maturation# c2 f/ V5 u$ C b# `% _7 v
decelerates and gradually returns to normal.8,98 i: V( |. x2 Y8 }4 \) s( S2 L
There are conflicting reports and controversy, C$ @! P s$ s% G/ T: j
over the effect of early androgen exposure on adult) e, Q1 {4 O; d$ |2 ]
penile length.10,11 Some reports suggest subnormal
$ ^/ k0 N$ |# Z$ cadult penile length, apparently because of downreg-
8 v6 _; q v+ B$ A1 v" ]ulation of androgen receptor number.10,12 However,) [% S6 W& B( y0 e# y; c
Sutherland et al13 did not find a correlation between4 W5 d" D0 X7 X
childhood testosterone exposure and reduced adult& L% g. l- G$ X; D4 N9 O
penile length in clinical studies.
5 ]! d" z0 M& F; f' dNonetheless, we do not believe our patient is
% e; U2 h$ T7 u: u igoing to experience any of the untoward effects from/ _% j; D" p5 A7 t2 I
testosterone exposure as mentioned earlier because( G1 F4 v2 x! [! C* I
the exposure was not for a prolonged period of time.
, ]: ]+ |; s. i6 Q" ]7 u/ `- l* oAlthough the bone age was advanced at the time of
( [& V" _- ]" c/ m! }6 F- F: m( Ddiagnosis, the child had a normal growth velocity at& C% o4 R; B G( V- P! ]- k
the follow-up visit. It is hoped that his final adult
7 M, |5 I3 F6 p5 b ]1 ]height will not be affected.3 d4 t: `# l4 z/ o. ]
Although rarely reported, the widespread avail-
+ I. |' v0 \. n) d8 ^ability of androgen products in our society may
+ m, }) ^# x) z7 @2 A7 C& v" d5 sindeed cause more virilization in male or female. `' t" E. N' j& N' }0 W/ B4 G
children than one would realize. Exposure to andro-2 V" s5 q: A0 E C6 X( ~
gen products must be considered and specific ques-$ }" i# T t9 ]6 N
tioning about the use of a testosterone product or
7 f1 D1 u3 ~8 b+ q; B" xgel should be asked of the family members during
- Z# j3 i. X$ t5 r! q6 tthe evaluation of any children who present with vir- h k2 w$ \. {' w
ilization or peripheral precocious puberty. The diag-
* G* k* o5 z! D$ t+ Xnosis can be established by just a few tests and by
1 c2 C% N5 s8 n; F6 R3 k5 J4 Eappropriate history. The inability to obtain such a$ O/ k8 Y0 F; s0 r) k. ?
history, or failure to ask the specific questions, may3 Q* w+ B( P1 G9 a6 N( Q x& p
result in extensive, unnecessary, and expensive
2 b" O Z% [' F* A& zinvestigation. The primary care physician should be- B5 s* I* ? y0 L4 ?; V* d. ]
aware of this fact, because most of these children
9 B2 D8 a- C+ `( lmay initially present in their practice. The Physicians’
3 n0 h! M; I. G& L4 nDesk Reference and package insert should also put a
% ~* D2 b7 X$ z/ b3 P2 [warning about the virilizing effect on a male or& S7 O/ i( z3 N! Q& ?5 m1 ?, y
female child who might come in contact with some-
% y5 u& i2 [4 Tone using any of these products.
" {2 W# `$ {5 f3 R2 u2 PReferences
5 ]) |4 G; l% C# P+ [% b2 D1. Styne DM. The testes: disorder of sexual differentiation
% y6 v+ q3 h ^" cand puberty in the male. In: Sperling MA, ed. Pediatric- d2 V2 {" b1 c* ?2 j/ A$ z
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;$ \8 c# b& {. r, J3 I4 l$ X
2002: 565-628." W/ E1 i* z9 I; ?- e1 i
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
( Y$ d# A, u2 Y3 f; Vpuberty in children with tumours of the suprasellar pineal
, P5 K, t0 Q- l/ U% uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from- t6 |1 r0 \1 }9 J
Topical Testosterone Exposure / Bhowmick et al 543' c3 [+ ]6 [" p3 @0 Q
areas: organic central precocious puberty. Acta Paediatr.! ?/ @9 X8 @9 } T3 c1 L
2001;90:751-756.5 |+ s9 y, G2 m* |1 m/ j5 w
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.) ^" Z! a ]6 _8 e% \4 u3 L
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
# W' g8 K6 d* k: H( J8 BDekker Inc; 2003:211-238.
& x9 P+ W- \+ X! |- R' y4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual2 h% f9 C* Q& _) X
development in a two-year-old boy induced by topical# N& M1 o, F2 A
exposure to testosterone. Pediatrics. 1999;104:e23.
, @0 D- P! }; p5 ?1 y# \5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
5 }0 U _1 l- Y) v. g" U3 j; V; K) dSkeletal Development of the Hand and Wrist. 2nd ed.: Q$ u) B2 [ e0 G, R# Z
Stanford, CA: Stanford University Press; 1959.
" ~$ P5 e$ _3 s' h9 n' u6. Physicians’ Desk Reference. Androgel 1% testosterone,
8 n: Q1 o* G$ RUnimed Pharmaceutical Inc. Montvale, NJ: Medical
2 `! I3 |: H/ h e; D2 U6 R4 XEconomics Company, Inc; 2004:3239-3241.
' c# J! f+ {$ f, B# e/ B7 |7. Klugo RC, Cerny JC. Response of micropenis to topical
, ~8 `1 O9 ]* v) v" _* o- X$ _testosterone and gonadotropin. J Urol. 1978;119:) R4 L8 j4 j- V; d
667-668.+ n7 C' |" |$ J @: ^$ [
8. Guthrie RD, Smith DW, Graham CB. Testosterone/ m: x3 s+ d* U7 t4 s Q$ w
treatment for micropenis during early childhood. J Pediatr.
: O0 O8 J& }& p5 I- g- q+ J1973;83:247-252.6 [3 ~1 i, U9 L# D
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
' q6 U( _2 e1 t" P/ X/ D! ^therapy for penile growth. Urol. 1975;6:708-710.
- X, h8 G2 R; @+ A9 c s6 k' [10. Husmann DA, Cain MP. Microphallus: eventual phallic
1 e; E3 @, ^& n# nsize is dependent on the timing of androgen administra-
& c$ P; O5 E+ h$ gtion. J Urol. 1994;152:734-739.7 \$ T1 _- \" `& ^
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
8 ^* k2 {# F! R; o( v7 p+ t' odoes early treatment with testosterone do more harm
) y/ a7 o' {. v: h9 l! ^% i8 o( Hthan good? J Urol. 1995;154:825-829.
( d N L/ j0 _8 `4 y12. Takane KK, George FW, Wilson JD. Androgen receptor
8 \/ q- Y7 G6 J& Z J8 |of rat penis is down-regulated by androgen. Am J Physiol.
" G( a3 j6 ?; B X; S. g2 d1990;258:E46-E50.
' c6 S' V. I9 S; h& h13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect+ V+ E" w% g1 c0 [( y4 a( I
of prepubertal androgen exposure on adult penile7 L5 o6 K- i/ T0 S
length. J Urol. 1996;156:783-787. |
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