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is a significant concern for physicians. Central+ h" N* S3 H" z% S: k8 w
precocious puberty (CPP), which is mediated* o* D4 P7 z3 X1 j. E, E1 t
through the hypothalamic pituitary gonadal axis, has
3 w; [- Z( b' Za higher incidence of organic central nervous system
; s* D3 c9 W- s* s( p! ulesions in boys.1,2 Virilization in boys, as manifested. r% U3 ~/ z( F, o; ]8 R$ I
by enlargement of the penis, development of pubic/ T0 o p+ V2 K
hair, and facial acne without enlargement of testi-
9 E X- K5 i. f+ x- o1 n ocles, suggests peripheral or pseudopuberty.1-3 We5 h3 F. G% l* T
report a 16-month-old boy who presented with the
( I, \- s& k, q1 d% k# ~* Oenlargement of the phallus and pubic hair develop-8 c4 g& q, j5 V6 l9 g
ment without testicular enlargement, which was due5 [# K8 e0 u3 s
to the unintentional exposure to androgen gel used by
% p: C; E( R4 D6 Q" Mthe father. The family initially concealed this infor-- K/ l7 K% c0 C6 i; t4 f* z; e. Q4 e
mation, resulting in an extensive work-up for this
$ V: c' g) Q* Z H2 lchild. Given the widespread and easy availability of
4 R9 {2 |5 W/ Ftestosterone gel and cream, we believe this is proba-5 H3 {* N# S8 o; K7 z& s
bly more common than the rare case report in the
* r) M+ }; j5 K0 Zliterature.4* w* i1 [& Y/ |) K' K7 P2 m
Patient Report
* \; u% F( b1 ?: W9 @9 e" KA 16-month-old white child was referred to the9 p/ \+ l. \0 L- ^+ Y/ Q( _
endocrine clinic by his pediatrician with the concern9 |: c+ m/ [- n$ d7 Z& c$ O, L
of early sexual development. His mother noticed" T" B: R! _& u) X
light colored pubic hair development when he was
2 B! k3 {' X/ O$ V* LFrom the 1Division of Pediatric Endocrinology, 2University of$ k: x6 d1 n+ V; `
South Alabama Medical Center, Mobile, Alabama.- S* ~- l' O. n7 r$ S
Address correspondence to: Samar K. Bhowmick, MD, FACE,
5 _& F! H9 U* _7 Z ^! C) OProfessor of Pediatrics, University of South Alabama, College of
s! I+ k: d- Q: c" b4 d+ IMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;9 x1 j) x d* j
e-mail: [email protected].
7 ~0 [9 K$ c' x J ?about 6 to 7 months old, which progressively became
3 I, K; O5 h" V; p! y/ ydarker. She was also concerned about the enlarge-
' o. u6 A; L1 l/ S C2 d/ nment of his penis and frequent erections. The child
3 K) K. m; x" e- Y: r3 Fwas the product of a full-term normal delivery, with; B8 s; u8 v3 n: w! }" I
a birth weight of 7 lb 14 oz, and birth length of3 y1 [7 l0 }( N
20 inches. He was breast-fed throughout the first year
8 H2 {& C* R7 q, H( Nof life and was still receiving breast milk along with7 Z% q) C8 F' E( ?$ _1 V. M+ r! G
solid food. He had no hospitalizations or surgery,. N: L, } T* Z8 o9 r
and his psychosocial and psychomotor development
& o P* i) i9 e. J9 Swas age appropriate.
2 p# C8 _+ s; X& W# a! tThe family history was remarkable for the father,7 |! ~* V* `! O: j$ I! H
who was diagnosed with hypothyroidism at age 16,
6 s" ~ s) ], s+ ?. P) Cwhich was treated with thyroxine. The father’s
6 b U( J, @4 I7 I* d( Fheight was 6 feet, and he went through a somewhat
% r4 I( h( j3 r" {early puberty and had stopped growing by age 14.
5 }: N" K' f* F+ h3 M) yThe father denied taking any other medication. The
; l: D# _4 W: R* E; g7 _child’s mother was in good health. Her menarche L9 J: Z/ l4 J4 l$ g
was at 11 years of age, and her height was at 5 feet
4 H3 ?9 E, t* b3 x+ _5 inches. There was no other family history of pre-/ b5 Y8 L$ m. p6 q# _) R9 E
cocious sexual development in the first-degree rela-: D: |* b+ V& ~
tives. There were no siblings.
* o0 F4 B- P& Y/ `& dPhysical Examination
$ Z: l4 g9 {, s* N R5 ^7 h* lThe physical examination revealed a very active,- c- m @7 r& A. Z8 ~( {
playful, and healthy boy. The vital signs documented1 m, r3 b4 ~4 b4 r
a blood pressure of 85/50 mm Hg, his length was/ J. o. n' U, e, n+ w2 G4 f
90 cm (>97th percentile), and his weight was 14.4 kg
; X6 }1 M g8 v# J( r1 Y(also >97th percentile). The observed yearly growth4 I M* F; U# r# m% m1 G5 W
velocity was 30 cm (12 inches). The examination of
) e4 k u8 w, o! R; \5 l% l% S7 Hthe neck revealed no thyroid enlargement.
' ?9 G- K0 H+ D$ o0 oThe genitourinary examination was remarkable for
0 H$ S0 i7 U. R' W! ?enlargement of the penis, with a stretched length of( w+ v, k) j% y8 c) Q, i, G" a d
8 cm and a width of 2 cm. The glans penis was very well
% @2 Q% _2 ?! M6 H; Adeveloped. The pubic hair was Tanner II, mostly around
8 \/ I8 f7 M Z2 Z+ o, `' B540
: d1 K6 ]0 }- n2 Fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! o/ C* ^( ^" ~9 T; Fthe base of the phallus and was dark and curled. The
5 X0 G7 [" ~* F& p ttesticular volume was prepubertal at 2 mL each. y" J6 n4 |9 {" C$ s# X2 ?
The skin was moist and smooth and somewhat
5 `; f. }& b; e* p" _- qoily. No axillary hair was noted. There were no. Q5 z/ e; s ^/ x: s4 E6 Q
abnormal skin pigmentations or café-au-lait spots.
. D6 \7 z, |9 i7 f: f) ~Neurologic evaluation showed deep tendon reflex 2+
7 c; ]4 B1 {. ~5 _7 j" k1 F" Hbilateral and symmetrical. There was no suggestion
$ ]# p8 g# o6 |( W: Oof papilledema.; f. j( X2 V) R- c
Laboratory Evaluation$ f, `3 v. j, f7 O7 Q
The bone age was consistent with 28 months by( S$ C& n. q! ?$ y1 {- w& w
using the standard of Greulich and Pyle at a chrono-
2 V+ d+ x( C9 B& d! ~+ M1 \logic age of 16 months (advanced).5 Chromosomal# b7 g% S5 i5 Q# p6 Z9 _! ?' U+ l/ Y
karyotype was 46XY. The thyroid function test
+ [; l/ |% o4 z8 h" z- yshowed a free T4 of 1.69 ng/dL, and thyroid stimu-# W$ ~1 d- o* o1 {5 k& w" N* @, u
lating hormone level was 1.3 µIU/mL (both normal)./ W3 B( F; J x6 U6 P9 n; R7 F
The concentrations of serum electrolytes, blood
- x9 R4 ^- ~4 h! wurea nitrogen, creatinine, and calcium all were! F- S! X% G2 o
within normal range for his age. The concentration
8 M! _$ X( O0 H$ H$ g( D+ `9 |% Dof serum 17-hydroxyprogesterone was 16 ng/dL/ f3 w% m! |: S
(normal, 3 to 90 ng/dL), androstenedione was 20
$ W; V) {" x9 k/ Eng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
8 |9 r; d* g Z3 nterone was 38 ng/dL (normal, 50 to 760 ng/dL),
0 {# _+ O& z0 C3 S6 D* G* ~desoxycorticosterone was 4.3 ng/dL (normal, 7 to
! e9 G# I8 m. N5 P; M49ng/dL), 11-desoxycortisol (specific compound S)* t& ~* m+ _6 E) Z r3 Q0 ~. _! _
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-. Z& B/ C- X! H: G; L
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total6 x1 ~: C$ m' M2 t! k
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
/ [! w& s2 C1 N! l; g$ T5 n Qand β-human chorionic gonadotropin was less than7 k S/ A) V P5 f/ b
5 mIU/mL (normal <5 mIU/mL). Serum follicular
' {0 ~& M- k+ k: T& z2 R1 J: c8 `stimulating hormone and leuteinizing hormone
6 H& B, E i% O; K% Uconcentrations were less than 0.05 mIU/mL
/ J% t4 ^1 L( E9 ^( c(prepubertal).! q9 @- D, G. p7 b4 g, r8 f
The parents were notified about the laboratory
4 q) [6 p0 D6 w/ m, I7 Xresults and were informed that all of the tests were8 q: x4 n: ^1 H2 P' E
normal except the testosterone level was high. The* f3 B' w- W3 l8 R
follow-up visit was arranged within a few weeks to
+ k9 J1 O/ n4 ]+ O, [obtain testicular and abdominal sonograms; how-
) f6 S8 q. k, l9 Uever, the family did not return for 4 months.
5 z3 B# z" U7 h0 t3 j- ~. KPhysical examination at this time revealed that the
0 F# a* E$ B2 d' y, achild had grown 2.5 cm in 4 months and had gained. f, a! o) h5 ~9 C' o: T
2 kg of weight. Physical examination remained' h& B; g! x" e' H
unchanged. Surprisingly, the pubic hair almost com-
1 l+ }7 Y' j' }: `8 x2 V; g" ?pletely disappeared except for a few vellous hairs at
x* l% b; o( c8 n& U% qthe base of the phallus. Testicular volume was still 2
" F. T C$ s0 O" amL, and the size of the penis remained unchanged.( g, D/ |) z* O: J/ A9 y
The mother also said that the boy was no longer hav-
\3 R4 q: `1 B" i" e+ Jing frequent erections.) m# c, c5 i6 f! `- y) j& S
Both parents were again questioned about use of$ x l" ~$ l- e5 V4 l1 W
any ointment/creams that they may have applied to, S# w1 H2 ^' m8 c7 Y
the child’s skin. This time the father admitted the% J/ p# s7 e, p7 W/ X
Topical Testosterone Exposure / Bhowmick et al 541
: v7 _( m: W2 k1 D* J: fuse of testosterone gel twice daily that he was apply-
2 L4 s- Z3 S6 V$ d' \; R) k, Ding over his own shoulders, chest, and back area for
0 J/ ^" Z# I9 X6 c0 U% ga year. The father also revealed he was embarrassed# P( @, }6 X% E7 e/ ~8 ^
to disclose that he was using a testosterone gel pre-% Y1 D. B# d! n- T
scribed by his family physician for decreased libido4 H4 u" ^. t: U! {8 X9 L
secondary to depression.6 _4 [; K9 y9 G4 d* U& U, H
The child slept in the same bed with parents.$ `, ?* H) \8 A) q
The father would hug the baby and hold him on his
% r$ _: @1 }6 l& u; i+ b0 ?chest for a considerable period of time, causing sig-$ g$ i* i* }1 m
nificant bare skin contact between baby and father.9 D% J2 P+ P$ m* c* S5 X! y
The father also admitted that after the phone call,0 ?" F8 q; t: U; |% D6 i
when he learned the testosterone level in the baby
( u7 M; W0 E* @' }+ E$ e m, F: Hwas high, he then read the product information* m+ H2 A; r" i( j% e/ K- s
packet and concluded that it was most likely the rea-9 F; R1 y6 |: X }6 v% x2 L
son for the child’s virilization. At that time, they7 }* D) T+ k8 r& K3 G, r
decided to put the baby in a separate bed, and the
; p3 l+ f5 E; f. i& Hfather was not hugging him with bare skin and had
- w) L3 g9 Z& D$ K1 p7 K9 n1 fbeen using protective clothing. A repeat testosterone
9 q. W8 ?, I9 F& K( L, c$ M J7 ytest was ordered, but the family did not go to the
1 ~' \% q" ]& Y& u9 k/ Plaboratory to obtain the test.
$ n( b, b- C# r8 w7 W2 YDiscussion3 ~7 o% a2 ]$ L& e* k7 Z
Precocious puberty in boys is defined as secondary
: [- i# O+ q$ z/ Y* R) h; C! vsexual development before 9 years of age.1,4
% A) w5 t' z4 E- R2 XPrecocious puberty is termed as central (true) when
( n( v7 I {7 ~1 qit is caused by the premature activation of hypo-
" K- R' n5 ?: k; B0 hthalamic pituitary gonadal axis. CPP is more com-
; \+ ]) X* M" [# _( mmon in girls than in boys.1,3 Most boys with CPP
3 ^; `# z9 G& [9 {* t5 |may have a central nervous system lesion that is
" N/ v3 k5 } K4 s8 Tresponsible for the early activation of the hypothal-
5 v5 { i i! U: F5 r3 @ g% Ramic pituitary gonadal axis.1-3 Thus, greater empha-& S/ t9 w# X( J) S
sis has been given to neuroradiologic imaging in5 ^9 V7 n( p: ~& X. g
boys with precocious puberty. In addition to viril-# @5 r, ^% b$ a* t6 ?' ~& w
ization, the clinical hallmark of CPP is the symmet-/ L4 T) _3 z# Q4 [" k
rical testicular growth secondary to stimulation by
" T+ m* e) s7 t7 ]4 M5 F% @gonadotropins.1,3$ ]2 ?! p8 P% G# j9 l
Gonadotropin-independent peripheral preco-& j: \2 U8 L0 y* O: W9 `$ ~
cious puberty in boys also results from inappropriate1 G( L" }0 W$ K( e, a5 v) x
androgenic stimulation from either endogenous or7 M5 U4 E- D% t
exogenous sources, nonpituitary gonadotropin stim-: x b) s% {' w
ulation, and rare activating mutations.3 Virilizing M$ R2 T: M: Z+ e. `
congenital adrenal hyperplasia producing excessive
' U: ~7 e8 c) z! b0 L* X3 ]0 Eadrenal androgens is a common cause of precocious% M$ F( I" N- H, v5 I' N0 e% r. m
puberty in boys.3,4, F t2 M* s7 _7 W4 f
The most common form of congenital adrenal
8 \3 d0 \& H3 T9 _hyperplasia is the 21-hydroxylase enzyme deficiency.3 x x$ u& } J# r
The 11-β hydroxylase deficiency may also result in
& C T9 c+ y2 O( m+ g& q7 G0 Hexcessive adrenal androgen production, and rarely,
* Q3 F9 p: _$ @' b% pan adrenal tumor may also cause adrenal androgen _$ l* H% u9 `! H
excess.1,3( w& ?8 J0 A) H. ^. S4 A
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, ^; ~% G3 k, Q4 Q542 Clinical Pediatrics / Vol. 46, No. 6, July 20079 M4 @$ C1 O/ G5 S# K7 [
A unique entity of male-limited gonadotropin-0 _$ x4 d9 P2 v5 l& M2 j
independent precocious puberty, which is also known' v; `, ~" y* W, c* ^: Y* z9 G
as testotoxicosis, may cause precocious puberty at a/ g# j9 _# h3 |$ p: ]3 H, F
very young age. The physical findings in these boys
3 s: l% Z- _& q9 X$ Z1 Pwith this disorder are full pubertal development,
* i. ^& Y; H+ T! g; I* y1 C+ Dincluding bilateral testicular growth, similar to boys
0 Q: M& E! Z' U; t `, J& _with CPP. The gonadotropin levels in this disorder
& `- e- T1 ~2 K: Pare suppressed to prepubertal levels and do not show) D( ]: R1 t) j+ j2 G
pubertal response of gonadotropin after gonadotropin-4 V/ }7 \' F- O9 F; H
releasing hormone stimulation. This is a sex-linked
( A8 i# _' D' Hautosomal dominant disorder that affects only; @0 Y) f5 R2 X6 U) D. C& n
males; therefore, other male members of the family
1 D% u5 v# c Vmay have similar precocious puberty.3
( Z6 D! q& k, A3 h2 wIn our patient, physical examination was incon-
2 N) B: A8 N$ f5 u: ]. R' Xsistent with true precocious puberty since his testi-4 o# e4 P1 B, F/ t( O; K
cles were prepubertal in size. However, testotoxicosis) q. C- b( Y- G& a1 o* Q
was in the differential diagnosis because his father
7 k0 W6 M% V! g# [' k/ K% Vstarted puberty somewhat early, and occasionally,
z4 x1 {0 U" C, j2 U' ftesticular enlargement is not that evident in the7 x4 |: @. ]6 _0 N& H' F
beginning of this process.1 In the absence of a neg-
$ W( J4 S7 X5 t' q- Xative initial history of androgen exposure, our
' e: \. g1 J- L4 X/ s5 }7 Z3 Wbiggest concern was virilizing adrenal hyperplasia,8 @: J) c3 [4 d
either 21-hydroxylase deficiency or 11-β hydroxylase3 |- f7 U! t( @0 U
deficiency. Those diagnoses were excluded by find-. y- l3 l5 y8 U8 N( p- C1 _
ing the normal level of adrenal steroids.
/ V0 q4 P$ @6 y* a6 _8 a UThe diagnosis of exogenous androgens was strongly: Q/ v( O: y. Q- [) p9 r% r
suspected in a follow-up visit after 4 months because
' F& `" @/ N- d% R% R9 {the physical examination revealed the complete disap-- k$ G9 o' [7 h( `0 {
pearance of pubic hair, normal growth velocity, and! _0 U6 _3 G6 z. B+ ~
decreased erections. The father admitted using a testos-
5 ~& Z- z- ], bterone gel, which he concealed at first visit. He was
& o! M4 w! N1 p) F6 Y) fusing it rather frequently, twice a day. The Physicians’
3 {9 b: _7 x4 J# {& D" a: d: t# A5 cDesk Reference, or package insert of this product, gel or
3 c/ z9 ?* F+ h( \cream, cautions about dermal testosterone transfer to
6 O+ O$ @( }0 U2 [unprotected females through direct skin exposure.
6 M4 }/ G+ d( ]! |Serum testosterone level was found to be 2 times the
. \5 E- q* j$ _9 ybaseline value in those females who were exposed to* ~4 `; M7 d! ^" C' ^, |
even 15 minutes of direct skin contact with their male
- l: a, c A9 Y9 t1 _) Spartners.6 However, when a shirt covered the applica-
7 V2 I3 @: n) a. \( ption site, this testosterone transfer was prevented.
- l7 t4 q9 |( _' L) NOur patient’s testosterone level was 60 ng/mL,9 A; I& _! m8 l- y7 o
which was clearly high. Some studies suggest that2 H' o/ w' L7 p+ A' p. ?- V
dermal conversion of testosterone to dihydrotestos-
/ t$ t6 O/ e9 f+ }8 ^terone, which is a more potent metabolite, is more
* j+ R5 G, g9 a% `! B5 Eactive in young children exposed to testosterone. }, U) u1 p2 D' l7 u9 C
exogenously7; however, we did not measure a dihy-
9 ]. C6 F; Z" c) l9 O4 i [8 Cdrotestosterone level in our patient. In addition to) |- @3 ^9 f+ ]% S9 n/ |% F
virilization, exposure to exogenous testosterone in+ Y7 A5 d, Y% V2 u4 w
children results in an increase in growth velocity and
9 |8 ~, e* Y2 T% a9 ^2 xadvanced bone age, as seen in our patient.
* l6 i* w$ _3 o% s. d3 zThe long-term effect of androgen exposure during- F8 O; J+ B) \
early childhood on pubertal development and final
3 o; i+ c" H1 ?, W# ?5 ]5 j& {adult height are not fully known and always remain
! [! C' T4 F2 \9 E( ca concern. Children treated with short-term testos-& C% n% c1 V* k6 `
terone injection or topical androgen may exhibit some' ~+ R1 E# o% q* ?
acceleration of the skeletal maturation; however, after6 u; U+ G- }. @7 \0 G' ^* Y: e8 | {
cessation of treatment, the rate of bone maturation9 r# r# r, U& O4 c$ R
decelerates and gradually returns to normal.8,9( t" Z% Z" y! ]0 s+ W
There are conflicting reports and controversy9 t& q. i. ^3 n7 f+ b
over the effect of early androgen exposure on adult3 }4 U& m' y4 X
penile length.10,11 Some reports suggest subnormal
- y0 i3 S+ ?- ~adult penile length, apparently because of downreg-' R$ H& E$ v: y, {/ T8 R+ Y
ulation of androgen receptor number.10,12 However,
' w" d& G* {0 T+ ~6 H) zSutherland et al13 did not find a correlation between! ^( I0 W. q) ~! D1 i
childhood testosterone exposure and reduced adult: m J2 E# r5 V2 N) Q% s, d( E/ _
penile length in clinical studies.
2 K' D. _- k. Z3 R, S6 n% V- h! ]; fNonetheless, we do not believe our patient is
% n5 C# r! Y3 t5 A Ggoing to experience any of the untoward effects from) [ S2 N% W) F. [3 {
testosterone exposure as mentioned earlier because
; a% W; g4 w# I3 B G3 ^the exposure was not for a prolonged period of time.
) S2 u$ C$ E( x: o# `Although the bone age was advanced at the time of7 q: Z. X! ~5 e0 i& b3 N
diagnosis, the child had a normal growth velocity at
" N% [! H0 ~; w. C7 `& {" U* ^0 A1 Hthe follow-up visit. It is hoped that his final adult6 q. G7 Q# v; E. |
height will not be affected.$ r0 L6 A' T' b( C. T+ x
Although rarely reported, the widespread avail-( j, c x( d/ e
ability of androgen products in our society may
6 w# d. N8 @ {( H7 F; o( Cindeed cause more virilization in male or female
9 N8 T8 U" J. b R5 F) @4 vchildren than one would realize. Exposure to andro-
2 D) g ?7 S2 d/ U" e% xgen products must be considered and specific ques-: S1 v& F! I. a. E) n" n+ _
tioning about the use of a testosterone product or: j4 B! F6 r: H: R: t V$ O3 i
gel should be asked of the family members during
5 y5 C/ |# D' C0 cthe evaluation of any children who present with vir-+ e& Y* S; t5 u: l. s
ilization or peripheral precocious puberty. The diag-& {4 ]' m% h' S1 Q% D, U5 T F
nosis can be established by just a few tests and by
8 ]! a( V: H) ]$ K/ A. b" z0 Lappropriate history. The inability to obtain such a8 x s0 ^* m! D0 v% O: L! v! |
history, or failure to ask the specific questions, may
5 `3 ^; R& F5 Z& `result in extensive, unnecessary, and expensive, J; h9 C* D g/ n
investigation. The primary care physician should be
3 N! v1 l6 [9 V2 baware of this fact, because most of these children
, p' n: Y. B: \! xmay initially present in their practice. The Physicians’
. c$ z$ G6 A; \( Q+ E, cDesk Reference and package insert should also put a# v5 T3 x N; X. [" W& A# @0 {
warning about the virilizing effect on a male or ?9 ]& | \2 X- { T
female child who might come in contact with some-% z; `2 P& h9 R$ f
one using any of these products.
' R4 ^8 ~& N2 G3 e' k; j1 O/ dReferences8 _4 N- W5 i% |
1. Styne DM. The testes: disorder of sexual differentiation
1 S8 ^2 S+ Q/ i0 I# vand puberty in the male. In: Sperling MA, ed. Pediatric b" O4 v9 K1 ?
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
. O0 c' m' \$ Z$ |. ]) L2002: 565-628.8 I8 I E' S3 Q1 |! c
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
3 \8 z$ y- g$ Z- Opuberty in children with tumours of the suprasellar pineal# X2 Q) N* V5 h% t: ^- l
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 R) }0 i2 @( j Q& w) [4 u
Topical Testosterone Exposure / Bhowmick et al 543/ P4 e2 d2 y( o; b) I( f" f
areas: organic central precocious puberty. Acta Paediatr.0 \+ P/ T5 @9 l- E) z5 P
2001;90:751-756.
& }4 D1 E' `( E& {3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
. F" h6 ^1 g8 UPediatric Endocrinology. 4th ed. New York, NY: Marcel
! P0 T0 q i1 t' R( S* t( b4 h0 MDekker Inc; 2003:211-238.8 V5 x# S; l/ ~6 a. N( i/ S- \) q
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
* e& b" ?2 A2 p9 g' w' q- Wdevelopment in a two-year-old boy induced by topical
% p) u* ]$ k: A; ]6 s5 D! `exposure to testosterone. Pediatrics. 1999;104:e23.+ \: C- v3 j" M7 G+ ?; u
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of+ ?( c8 v' [+ z: V
Skeletal Development of the Hand and Wrist. 2nd ed.
8 P- h& E. I! z& ^5 b+ J) ZStanford, CA: Stanford University Press; 1959.! }+ U7 _! Y4 B$ w$ K8 A/ d/ h
6. Physicians’ Desk Reference. Androgel 1% testosterone,
2 [8 _" N& }" P9 bUnimed Pharmaceutical Inc. Montvale, NJ: Medical
; \4 P7 w# l# ?3 f% I4 {Economics Company, Inc; 2004:3239-3241.* H; G1 q5 U0 X) v
7. Klugo RC, Cerny JC. Response of micropenis to topical) |& }$ f% n: g' ^* N
testosterone and gonadotropin. J Urol. 1978;119:
" p0 a) t' \9 G) n# ?667-668.' ?1 K' N( F6 a8 B8 ]; Z5 d u
8. Guthrie RD, Smith DW, Graham CB. Testosterone7 {$ q s7 U9 t/ ~7 X4 c
treatment for micropenis during early childhood. J Pediatr.1 Y& C7 ]) w( r3 i$ ~, E
1973;83:247-252.# y) ]: N' w3 g! s
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone' q. V& F9 t( z& m# n* q
therapy for penile growth. Urol. 1975;6:708-710.
4 D V; P3 P6 {! d3 v. }10. Husmann DA, Cain MP. Microphallus: eventual phallic9 @( d) T1 V S9 }( M3 ^9 N
size is dependent on the timing of androgen administra-4 K/ L; G2 L( @4 i4 J0 I$ @
tion. J Urol. 1994;152:734-739.# v; q6 H, ~, C G0 T; Q
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:* ]2 ]' H& \+ p, g2 g; T8 k- ^+ K
does early treatment with testosterone do more harm0 z/ z8 @( Z3 u, n# [1 R
than good? J Urol. 1995;154:825-829.
3 l0 P: U8 f5 I5 V$ ~12. Takane KK, George FW, Wilson JD. Androgen receptor
. X" w* u9 c2 n% R% a( [; Uof rat penis is down-regulated by androgen. Am J Physiol.. l0 P- B7 n$ H) s2 r Z
1990;258:E46-E50.+ U0 g, G! y0 b: [' V7 u# {" n1 ]. j
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect4 i8 g) }6 h. W" B8 Z* [3 \
of prepubertal androgen exposure on adult penile
7 P4 d- a$ Y/ Vlength. J Urol. 1996;156:783-787. |
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