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is a significant concern for physicians. Central, q& O& }: s7 }
precocious puberty (CPP), which is mediated" ~. x9 H1 ~7 R; q0 Y& J
through the hypothalamic pituitary gonadal axis, has
: ~9 u3 q; X8 S0 U. ~$ a- f/ Wa higher incidence of organic central nervous system
. T F% ?) _6 e, \! [$ M# Xlesions in boys.1,2 Virilization in boys, as manifested
9 j& n5 Q2 ]4 V+ ~, t9 @& qby enlargement of the penis, development of pubic' H: \2 H9 Y6 I+ @8 o4 b+ V) g
hair, and facial acne without enlargement of testi-
2 u# A7 M7 ?' w- A( G% M, o; |& B( Ycles, suggests peripheral or pseudopuberty.1-3 We
! @: k7 a% }# {0 g7 breport a 16-month-old boy who presented with the& z; B) }6 {% B q8 v% J
enlargement of the phallus and pubic hair develop-& P; l6 y( d4 a
ment without testicular enlargement, which was due) t5 u! ?; b0 F# v# n w
to the unintentional exposure to androgen gel used by" O7 Q, @' {5 k" i4 g# J/ \
the father. The family initially concealed this infor-$ v' U/ S, c. A& x
mation, resulting in an extensive work-up for this. t) A& p2 q' @' _' U
child. Given the widespread and easy availability of; g# i$ A2 b+ Y8 \8 e- y
testosterone gel and cream, we believe this is proba-; ]% t2 F; x* Q H" B( x% K; ]
bly more common than the rare case report in the
% x$ l1 ?# M* U% V: a; tliterature.4
4 G$ G L# \. ?+ w; [Patient Report: ]# C( P8 S* i) _* e+ Z
A 16-month-old white child was referred to the
& o2 B, l0 z, }7 xendocrine clinic by his pediatrician with the concern
) v/ I$ B' G" W9 o: w" q" `of early sexual development. His mother noticed+ Q1 R7 E3 t# |/ Y* F
light colored pubic hair development when he was
- A3 Y/ V, l" p' f! _ gFrom the 1Division of Pediatric Endocrinology, 2University of
( E ~! L j/ v2 JSouth Alabama Medical Center, Mobile, Alabama.
0 \6 s9 r0 P. }9 ^Address correspondence to: Samar K. Bhowmick, MD, FACE,
4 C% s% l7 P0 g0 D. B6 T; ^Professor of Pediatrics, University of South Alabama, College of }9 O( G2 M. Q% k: l# d
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
) w5 w* ~9 i7 p1 E/ F# \7 Pe-mail: [email protected].9 V3 @7 {5 q, t3 z) K$ H
about 6 to 7 months old, which progressively became
7 p2 v! V, K' w2 T0 \darker. She was also concerned about the enlarge-3 Q' @7 L" o0 d5 L
ment of his penis and frequent erections. The child/ \ [( M7 c* h1 E
was the product of a full-term normal delivery, with) [0 |) v1 V( }& {# f
a birth weight of 7 lb 14 oz, and birth length of+ Q) }, f. ?& a* S
20 inches. He was breast-fed throughout the first year
- O# z- [; Z O- o3 X# y. L# W7 Nof life and was still receiving breast milk along with
5 C* T, w3 }7 o1 y* ]5 Tsolid food. He had no hospitalizations or surgery,
2 R' m( |( T5 V; mand his psychosocial and psychomotor development7 b/ A1 c- Y" B0 T
was age appropriate.3 J7 S0 o, V. A2 |# C2 D* q% m
The family history was remarkable for the father,! n0 _, g$ C' e4 e
who was diagnosed with hypothyroidism at age 16,
4 A$ M5 p+ H; E" P( Owhich was treated with thyroxine. The father’s
8 T% @) O0 I& p1 Qheight was 6 feet, and he went through a somewhat
: G+ N8 ~: {; R& Kearly puberty and had stopped growing by age 14.1 Z Y; ?% F" W# I3 B& c
The father denied taking any other medication. The
) p3 O1 t- X+ N' K' u: [# [/ A( e6 q; schild’s mother was in good health. Her menarche
0 |5 I- \8 n1 ]- m: Z+ j2 ?- d6 kwas at 11 years of age, and her height was at 5 feet
) E8 ?! D3 c$ o Q5 inches. There was no other family history of pre-
; z* O* n0 k: s& W/ Wcocious sexual development in the first-degree rela-
3 r, b' O; X( O0 T. s+ o7 qtives. There were no siblings.* L$ O4 D$ N; Z0 }- z1 B% X
Physical Examination, `0 X& M' |4 h5 R7 D6 v/ K
The physical examination revealed a very active,9 C$ k% f1 L2 t& r
playful, and healthy boy. The vital signs documented
5 X2 g/ \7 D9 |+ K, a; }a blood pressure of 85/50 mm Hg, his length was
) v5 K( T5 M7 {$ y; u! }90 cm (>97th percentile), and his weight was 14.4 kg
4 p* X9 `7 [# U9 k; R0 }(also >97th percentile). The observed yearly growth+ {! e" {1 G9 H4 h- L I' @
velocity was 30 cm (12 inches). The examination of
) C0 m, f, E5 I4 B6 tthe neck revealed no thyroid enlargement.
% w' {) D9 A. t+ ^$ t* \1 i' B A6 DThe genitourinary examination was remarkable for
9 a- n4 F% s# e5 Jenlargement of the penis, with a stretched length of% T+ I, n G* }% {- L' d
8 cm and a width of 2 cm. The glans penis was very well
' `! Z$ B5 B4 ^developed. The pubic hair was Tanner II, mostly around' r1 m$ c1 u t" y2 q7 t
540. v- j7 q+ m& P9 D) [
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 h0 z5 K4 q! G7 ^3 Pthe base of the phallus and was dark and curled. The$ c+ W v/ S& x
testicular volume was prepubertal at 2 mL each.; r) ?; j6 y3 Q$ N! Y0 R# }: M
The skin was moist and smooth and somewhat& z% Q6 |4 a4 @- u* s0 x
oily. No axillary hair was noted. There were no; Y8 q5 | `2 _" A
abnormal skin pigmentations or café-au-lait spots.
" ~: l4 V# f: t3 FNeurologic evaluation showed deep tendon reflex 2+
Z. V- l% {0 X+ B7 qbilateral and symmetrical. There was no suggestion0 F1 g! J6 O+ e- s+ S8 U
of papilledema.
1 ^! Y% }+ [; p) `6 P# n4 H' e. Q) E& @Laboratory Evaluation* y* c$ P) L! s
The bone age was consistent with 28 months by
1 i. h' e# y+ C- S# dusing the standard of Greulich and Pyle at a chrono- G7 s/ g% o& y! B+ H; [7 {3 W8 w) p
logic age of 16 months (advanced).5 Chromosomal* G# C* |% [. q
karyotype was 46XY. The thyroid function test
9 C: }& }" h; F9 D ?showed a free T4 of 1.69 ng/dL, and thyroid stimu-9 q9 U3 H: Q/ g8 ]: `/ P
lating hormone level was 1.3 µIU/mL (both normal).
6 U% C9 s0 s9 H0 {/ Q1 V- I/ hThe concentrations of serum electrolytes, blood
+ V1 _# }3 `9 W* @$ qurea nitrogen, creatinine, and calcium all were
V4 B0 p! l* n; u% w$ g* r- e& mwithin normal range for his age. The concentration
" b4 }6 Q7 n' H, O) U5 Aof serum 17-hydroxyprogesterone was 16 ng/dL4 y5 g, q8 s' m. }4 n- {+ k$ b* O9 }
(normal, 3 to 90 ng/dL), androstenedione was 20; m/ M6 T0 H( ` {. w% T
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-$ L/ {. R: t) a" e/ v
terone was 38 ng/dL (normal, 50 to 760 ng/dL),, T: X- D: B6 A& ]4 O2 ^1 C4 V
desoxycorticosterone was 4.3 ng/dL (normal, 7 to- n4 s/ ~7 W5 ~/ D5 `( M) B2 W
49ng/dL), 11-desoxycortisol (specific compound S): W: H9 S, m* q9 I: Z
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
1 W7 a7 Q4 D3 t) I3 b/ x. Ztisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total" H: }' _6 M$ H& G1 Q) k& P0 D% Q% ]
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),! m( e" ] M: d' g# j% }
and β-human chorionic gonadotropin was less than
$ {8 y$ S4 L- b5 mIU/mL (normal <5 mIU/mL). Serum follicular
_/ I9 F& J6 P# istimulating hormone and leuteinizing hormone
( k' }9 a8 j( g( Hconcentrations were less than 0.05 mIU/mL
, d( d: N! t( Z) j8 W(prepubertal).
7 m; B3 s% Z$ |The parents were notified about the laboratory0 J- k( M: {9 ~
results and were informed that all of the tests were6 [' Q, d' _/ ~
normal except the testosterone level was high. The
2 d1 \1 q# ]# J% q4 S: D! Kfollow-up visit was arranged within a few weeks to
, ]" ^; }* e) N* D3 G" h" h7 t$ wobtain testicular and abdominal sonograms; how-2 l8 D1 J% t* J
ever, the family did not return for 4 months.* N' }$ r+ ~" {5 k. _0 o. b
Physical examination at this time revealed that the
( Q8 ~+ g( z) N. M+ b9 a/ f2 S/ Nchild had grown 2.5 cm in 4 months and had gained: x {) { e- H1 J' O
2 kg of weight. Physical examination remained! q" |8 \6 {7 t) u9 q
unchanged. Surprisingly, the pubic hair almost com-$ m. N R" b5 H( _1 ^- h# L
pletely disappeared except for a few vellous hairs at/ a) X/ ^( o i' M" O2 H
the base of the phallus. Testicular volume was still 2! Y, k/ l# ]. M
mL, and the size of the penis remained unchanged.$ s5 X! A$ ~* |* O6 m* N
The mother also said that the boy was no longer hav-$ e4 V$ X! [+ g; l) B( s) B
ing frequent erections.7 C2 ?$ ?& b% P# H+ X
Both parents were again questioned about use of% r2 r# y. ^" c: I" u2 O6 l) ^ S* |
any ointment/creams that they may have applied to* y/ ~7 X% y4 B2 b& s! {
the child’s skin. This time the father admitted the
$ f q5 C/ J( ?$ m( oTopical Testosterone Exposure / Bhowmick et al 541/ i$ i! O6 J/ b5 v7 ~3 b
use of testosterone gel twice daily that he was apply-
7 o/ Q, D" X9 }' |+ D1 Ping over his own shoulders, chest, and back area for
7 d9 ^: v4 }3 z1 P6 g7 m3 B: p4 M- G9 pa year. The father also revealed he was embarrassed. r8 {) r$ d6 } w
to disclose that he was using a testosterone gel pre- R( C" Z, G7 G3 ]; Z- \
scribed by his family physician for decreased libido
3 q% c- {0 b5 K/ j b5 T( Isecondary to depression.* }/ R) E% q! E/ t! A) G0 ^! S
The child slept in the same bed with parents.
! k# c3 Y- ^' G3 X7 c, ]& A- pThe father would hug the baby and hold him on his
1 Y4 X* h3 T6 X' ~/ S9 j. |chest for a considerable period of time, causing sig-5 z1 r* J+ M0 ~ O, i
nificant bare skin contact between baby and father.( q- ^, v8 w! r2 v2 u2 ^4 @. z! e# t4 H
The father also admitted that after the phone call,7 e |9 H9 M' J' e" A2 c
when he learned the testosterone level in the baby g' @2 _- K" `/ u2 l
was high, he then read the product information
3 k% v! m# d* U$ t0 jpacket and concluded that it was most likely the rea-9 e8 |" s7 P% g) M3 ^* H: M
son for the child’s virilization. At that time, they4 a( i1 E. {7 h" V, x2 k$ n8 i
decided to put the baby in a separate bed, and the
% a) Q* Z+ K( cfather was not hugging him with bare skin and had
5 r' E6 K" D1 V, Pbeen using protective clothing. A repeat testosterone4 ^9 Y' W% F( z! Z) Y- o& |( A5 e
test was ordered, but the family did not go to the* o9 c* {5 P) K& M9 E5 \. s
laboratory to obtain the test.
$ x* {) c. N) VDiscussion$ ^ T" [- G9 \, D
Precocious puberty in boys is defined as secondary7 q! j. Z% S3 W2 @/ ~$ F
sexual development before 9 years of age.1,4 {- g. S7 V8 e
Precocious puberty is termed as central (true) when
- u7 a L) P# z J4 G7 M! i/ y4 Ait is caused by the premature activation of hypo-
* f$ R1 N( B, p5 ]# q( {+ Nthalamic pituitary gonadal axis. CPP is more com-
3 X* r. ~9 A6 J! O7 a0 lmon in girls than in boys.1,3 Most boys with CPP- T n+ A1 g7 d- N
may have a central nervous system lesion that is2 ~" ~4 _9 ~) P3 \3 c
responsible for the early activation of the hypothal-* l; s3 } k7 K" @, V
amic pituitary gonadal axis.1-3 Thus, greater empha-' L/ H. G- k/ N
sis has been given to neuroradiologic imaging in
/ t0 R6 p/ k/ {+ ]. _boys with precocious puberty. In addition to viril-
* y. K& M* ?+ a3 o6 C# w6 k! t6 O* oization, the clinical hallmark of CPP is the symmet-
O, g" v7 H' l% {& `/ l, Lrical testicular growth secondary to stimulation by
3 g: u o+ b( {. fgonadotropins.1,3
0 m, ~+ W3 _2 SGonadotropin-independent peripheral preco-
- @2 X6 ^& u( ]% |# q Y2 R o( Fcious puberty in boys also results from inappropriate7 q0 I% i& u: |7 h0 N4 t& O
androgenic stimulation from either endogenous or
1 n4 ^2 L7 B/ D9 P8 T& m8 Uexogenous sources, nonpituitary gonadotropin stim-
7 { Y+ s" c. A; I8 z tulation, and rare activating mutations.3 Virilizing b% q9 g4 M4 C( D
congenital adrenal hyperplasia producing excessive
0 v2 z% S0 b+ K2 V& f6 nadrenal androgens is a common cause of precocious' a& d/ V' l9 e) h6 H3 E, [9 U! b2 n- W
puberty in boys.3,4% n8 N$ ]. ^) }% A
The most common form of congenital adrenal4 F! Q, N1 Q" m3 n+ K. ]# g1 N# G
hyperplasia is the 21-hydroxylase enzyme deficiency.
! H0 s) j; W }" P$ E, aThe 11-β hydroxylase deficiency may also result in
7 \! D, N6 r" ]$ x7 o0 p' Q$ w$ h% kexcessive adrenal androgen production, and rarely,
- F, M# h* ~/ }. A# R/ Y, v6 M9 Z! @an adrenal tumor may also cause adrenal androgen
3 Y, e0 e9 Q5 j; Q; V3 cexcess.1,3% Q! {4 l% f3 _" w/ O) M
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ K" w B3 a1 q' p' p: o542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
a- V( ~! o' {! S4 cA unique entity of male-limited gonadotropin-' Z4 R% B" [# h- I% z
independent precocious puberty, which is also known' B& N. W. x% j. b: m& v
as testotoxicosis, may cause precocious puberty at a
( B. \* n4 D& z- O4 S) ^1 Rvery young age. The physical findings in these boys
1 m! _7 k, o. q) R: S# r3 Kwith this disorder are full pubertal development,2 X! o3 w) y1 e, E- |0 ~; A; s
including bilateral testicular growth, similar to boys
0 u( Y k, d, w9 f9 Hwith CPP. The gonadotropin levels in this disorder
; w, ^4 i$ q2 h6 V2 \are suppressed to prepubertal levels and do not show. K9 F, v; y( `6 Z1 F' a! B
pubertal response of gonadotropin after gonadotropin-
7 V1 {5 u v* N' Hreleasing hormone stimulation. This is a sex-linked8 t. m6 z* r) f2 m3 ]7 a
autosomal dominant disorder that affects only
: N7 v8 V$ S3 R1 n. F- Rmales; therefore, other male members of the family
% k; [9 Z5 C N1 e$ X3 r% i Hmay have similar precocious puberty.3
+ H2 S- K$ l% C# p. X2 [" [( WIn our patient, physical examination was incon-9 h! E# R. V; p( E
sistent with true precocious puberty since his testi-! x3 T9 |& x* M0 U
cles were prepubertal in size. However, testotoxicosis
0 L; T; [6 X2 U, C2 A/ G Iwas in the differential diagnosis because his father0 a2 |- m0 N; F
started puberty somewhat early, and occasionally,1 u" `$ `& w2 { W- C. ]' ^1 }
testicular enlargement is not that evident in the
- m" g1 F& @9 {8 k! K5 ^" vbeginning of this process.1 In the absence of a neg-: A- ^6 M. b6 N# x5 [ ~. n6 F% j
ative initial history of androgen exposure, our- @! E" }. x n6 G% E: ^2 s
biggest concern was virilizing adrenal hyperplasia,; p. T5 [) l) T
either 21-hydroxylase deficiency or 11-β hydroxylase
! I9 g, W; X" Q, A. q' ~2 \deficiency. Those diagnoses were excluded by find-
# @- v$ q: o2 Y: Z( Qing the normal level of adrenal steroids.; o1 M* O" f7 ]' f7 H
The diagnosis of exogenous androgens was strongly
) Q3 r& ^1 F* O9 o- M. Gsuspected in a follow-up visit after 4 months because9 T) {) h5 k1 ], [: A2 f" Y: V
the physical examination revealed the complete disap-4 Q9 j7 P, p4 F2 ~ U
pearance of pubic hair, normal growth velocity, and
9 m; t& c) T& \( C- ndecreased erections. The father admitted using a testos-5 p. @( G( S: b8 R
terone gel, which he concealed at first visit. He was7 }4 d1 ?$ q g; A6 b; R$ \+ E
using it rather frequently, twice a day. The Physicians’
/ s! E3 w1 c0 q/ YDesk Reference, or package insert of this product, gel or+ g2 Y. I- S4 k A- t1 m" z- Z8 B
cream, cautions about dermal testosterone transfer to
% }% D) X) n3 E' [0 Q) Sunprotected females through direct skin exposure.8 W$ A( E- ?4 I+ o n3 P7 S
Serum testosterone level was found to be 2 times the, d% ]* W; U3 v k
baseline value in those females who were exposed to# m# z9 C5 s- w/ ?( K: g, k$ l4 e
even 15 minutes of direct skin contact with their male
% f; T7 s7 ]" M4 ^* Lpartners.6 However, when a shirt covered the applica-4 D6 o% q0 g3 W0 d4 `7 K' B8 n! C: Z) X
tion site, this testosterone transfer was prevented.+ o/ e: e+ @+ Q/ `$ m& K
Our patient’s testosterone level was 60 ng/mL,' S! M" }7 G3 t$ I! G
which was clearly high. Some studies suggest that
: V- [. m( P. t' W: m( w* Kdermal conversion of testosterone to dihydrotestos-
9 j! y' p- z* O# }$ Uterone, which is a more potent metabolite, is more+ W" l9 z9 X* r
active in young children exposed to testosterone$ R8 U4 Z0 a' [+ D+ U
exogenously7; however, we did not measure a dihy-
% w5 m; \9 N& W5 |* p5 n ~drotestosterone level in our patient. In addition to
A2 |8 E. L6 b: S+ }virilization, exposure to exogenous testosterone in! l! L" L6 @: j) U
children results in an increase in growth velocity and/ v i, z G% q5 `- @3 F4 D, P
advanced bone age, as seen in our patient., B) j; [1 o( I
The long-term effect of androgen exposure during' T- @/ Z' Y+ q/ h7 v' n
early childhood on pubertal development and final# U% n+ S% L0 e3 A/ @
adult height are not fully known and always remain
) Z* \1 l/ u" C O) Ea concern. Children treated with short-term testos-/ `5 h) ~9 k' {4 x+ z# C+ k8 i4 u
terone injection or topical androgen may exhibit some
, Q4 G4 K! E( f! \2 a- m/ t" {! @acceleration of the skeletal maturation; however, after
0 x0 w8 _7 Y/ I/ v( T* `cessation of treatment, the rate of bone maturation" O5 T) c( n3 O) ~9 s8 h7 j; @! O
decelerates and gradually returns to normal.8,9
- F5 Q* F) M( A3 h9 i1 ?There are conflicting reports and controversy
: K4 f! ^6 M- O' A/ _1 Nover the effect of early androgen exposure on adult
0 B5 N" a# m9 O0 ppenile length.10,11 Some reports suggest subnormal
1 C- h: @$ k8 W% R/ G' yadult penile length, apparently because of downreg-$ `$ N f1 N; @; e
ulation of androgen receptor number.10,12 However,
; q6 C/ V+ r3 G3 o! j5 uSutherland et al13 did not find a correlation between
! q. [% N" J3 }! X+ \9 X5 M mchildhood testosterone exposure and reduced adult
' M7 |2 T. Q* f% jpenile length in clinical studies.
p( ?. K& \* UNonetheless, we do not believe our patient is3 h0 @* l8 Y) C2 S: B8 S1 d
going to experience any of the untoward effects from
- M F. H9 Z% h' n+ ?% Y4 U- Htestosterone exposure as mentioned earlier because
x, O5 Z! @* o6 r9 Tthe exposure was not for a prolonged period of time.
. C) K+ {9 j* gAlthough the bone age was advanced at the time of
0 m& r. H( V: N) Ddiagnosis, the child had a normal growth velocity at
$ n; j& z( L1 u! E/ Athe follow-up visit. It is hoped that his final adult! Z! a4 L% H2 \; D
height will not be affected.' r2 q) b. n* {) C, G! p9 S
Although rarely reported, the widespread avail-
4 Y$ Z- f G9 @, p4 K4 S1 kability of androgen products in our society may) N+ F8 Q" i' z) W: K/ m: R
indeed cause more virilization in male or female
" y( z! Q8 i3 Z7 W7 W- b @, J5 Hchildren than one would realize. Exposure to andro-
( M( q) e. J, w! V9 i6 J* `gen products must be considered and specific ques-
6 H/ g2 w9 Z9 P/ c7 |tioning about the use of a testosterone product or2 U, q7 q1 ^3 x' N4 Z: o
gel should be asked of the family members during$ @! j& Y+ r- O: S
the evaluation of any children who present with vir-1 V% y# d9 R, U% v
ilization or peripheral precocious puberty. The diag-! {- Y) k/ O, ]& r
nosis can be established by just a few tests and by
& c# W, d- c' o, u( Q' zappropriate history. The inability to obtain such a4 A ?/ J0 N8 q& v3 g' l
history, or failure to ask the specific questions, may0 h6 B$ e$ B. e
result in extensive, unnecessary, and expensive4 A( P" ?' Z2 h: K8 z7 T
investigation. The primary care physician should be1 s) Y k( Q1 H# S
aware of this fact, because most of these children
: w; J; L& Q# V: u9 cmay initially present in their practice. The Physicians’
" I' Q) N# \* `) d& ]Desk Reference and package insert should also put a
( g; |4 |$ Q9 mwarning about the virilizing effect on a male or" P1 u* p' p; L3 ]! [
female child who might come in contact with some-7 ~5 n. \, M/ c8 r
one using any of these products.
( H' T' H. X/ `2 kReferences
3 O- t6 M& z2 I/ S" C) b1. Styne DM. The testes: disorder of sexual differentiation
% l7 J2 Z3 v# m+ T1 j Xand puberty in the male. In: Sperling MA, ed. Pediatric2 L4 F2 k* d8 X
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
/ b6 ]6 y5 n. K7 [8 y# u2002: 565-628.5 B. G( k4 G, C3 |6 @* G! q- ]
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious, g* w* Z7 Z, b0 R$ y4 z
puberty in children with tumours of the suprasellar pineal
$ q, `- J/ `( Aat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from& |" d& M" f0 i) b; W1 n! {
Topical Testosterone Exposure / Bhowmick et al 543
4 |/ } O! _, s( q1 k( X m$ careas: organic central precocious puberty. Acta Paediatr.) c( }' a* D/ G# ?/ u# ]: t6 b
2001;90:751-756.
! i1 u. b( t) d7 l3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
& F' ?9 O' j/ j. i# F5 UPediatric Endocrinology. 4th ed. New York, NY: Marcel. K1 p8 S$ X3 [
Dekker Inc; 2003:211-238.
! P, L; D; n. b$ [1 E) j* x7 B; `& m4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual4 I8 ]4 X9 u d# c
development in a two-year-old boy induced by topical
5 c8 i) b8 P7 }" I- ~3 |/ dexposure to testosterone. Pediatrics. 1999;104:e23.
( A9 P i- p7 h2 @5. Greulich WW, Pyle SI, eds. Radiographic Atlas of, a! |5 v2 }: G# l+ @' S% l
Skeletal Development of the Hand and Wrist. 2nd ed./ q1 g O3 o$ f" }$ w
Stanford, CA: Stanford University Press; 1959.; ^; U# ]+ r" D" S1 r
6. Physicians’ Desk Reference. Androgel 1% testosterone,- e. W' F9 S" \! e! o
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
6 K" Z, V% X1 Y& _Economics Company, Inc; 2004:3239-3241.4 i/ r" S& v; \8 x( s) d1 i6 f
7. Klugo RC, Cerny JC. Response of micropenis to topical1 z6 }& m# H s7 c* Z3 J: u
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