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is a significant concern for physicians. Central) H: ?2 A: a9 S" k
precocious puberty (CPP), which is mediated
; m6 `, S# H8 ~1 ^- y( R2 wthrough the hypothalamic pituitary gonadal axis, has1 D2 ?/ {1 R9 R4 }
a higher incidence of organic central nervous system9 t) f2 g h8 Y. \4 g2 T7 C$ \- Y
lesions in boys.1,2 Virilization in boys, as manifested
- Z9 M- X5 O+ [+ y# W- _7 X0 K+ L0 Fby enlargement of the penis, development of pubic
1 G* i+ o) ^) L" D5 c) S6 Lhair, and facial acne without enlargement of testi-2 Q- {% ]: E* w7 {
cles, suggests peripheral or pseudopuberty.1-3 We
2 W: w+ h; g' o; q2 D( Nreport a 16-month-old boy who presented with the
0 l+ G& ]2 @: R9 ~8 K: `enlargement of the phallus and pubic hair develop-
0 Z/ o( r; W+ b. I. i& l" qment without testicular enlargement, which was due
9 L e7 D" E& U+ Bto the unintentional exposure to androgen gel used by
7 Y3 d/ q; ~8 dthe father. The family initially concealed this infor-. z0 O. ?1 u5 l+ S# \( o; v
mation, resulting in an extensive work-up for this9 o7 ]5 p6 G* V4 g
child. Given the widespread and easy availability of
2 m( @& H2 j9 f, [: B2 ttestosterone gel and cream, we believe this is proba-
+ \8 R9 E5 X) n2 l( x2 I7 }bly more common than the rare case report in the
/ h! N& e! c5 B4 T5 s, M6 ~* Jliterature.4
8 l1 }& t5 A t7 y" c8 r4 `Patient Report
1 J& x( ]" J4 l7 \A 16-month-old white child was referred to the
$ i* U$ |: Y$ p/ k: Q3 N4 xendocrine clinic by his pediatrician with the concern
, o) Z+ a/ e: i( R& v i! |* b+ kof early sexual development. His mother noticed3 d) D' D& c* [" T
light colored pubic hair development when he was
# x# S* D4 o( vFrom the 1Division of Pediatric Endocrinology, 2University of4 G& Y! H* N% P
South Alabama Medical Center, Mobile, Alabama.
5 D1 @" g4 p M# xAddress correspondence to: Samar K. Bhowmick, MD, FACE,( l* E9 V5 z/ t1 e9 d1 w
Professor of Pediatrics, University of South Alabama, College of, [' d4 k. F& F$ m% q2 ~2 i; P6 V6 z
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;3 f: G- U- [1 M8 I) m
e-mail: [email protected].
6 {: v8 c- H2 `about 6 to 7 months old, which progressively became6 p/ r Q! r) S, J! c5 g
darker. She was also concerned about the enlarge-. u1 c0 i" {- N: x6 ?4 F
ment of his penis and frequent erections. The child- D- u [+ n, W. C) S/ F6 h
was the product of a full-term normal delivery, with
; q, e, m# f, a4 U2 l) ia birth weight of 7 lb 14 oz, and birth length of; u' d/ L0 D7 T
20 inches. He was breast-fed throughout the first year$ e5 u! T# O) Q* ], g( R( Q6 E1 ]! ^
of life and was still receiving breast milk along with2 N& f6 K. l! t
solid food. He had no hospitalizations or surgery,3 x u# P6 j S- [5 u3 k
and his psychosocial and psychomotor development
7 [; y# ^' L' @* q8 h8 Vwas age appropriate.
! i2 h7 W7 i n$ ?The family history was remarkable for the father,( |$ m4 L+ ~3 ~1 _5 c+ q7 S4 T* o
who was diagnosed with hypothyroidism at age 16,
2 r/ J9 H# X' K9 A. ?; G- vwhich was treated with thyroxine. The father’s
: y( X6 r5 K& K& Zheight was 6 feet, and he went through a somewhat
, z4 \) I. O pearly puberty and had stopped growing by age 14.0 ^9 k* z9 M8 l* h
The father denied taking any other medication. The
2 O0 k3 C' @3 Z8 \! ~: g. cchild’s mother was in good health. Her menarche
0 ]0 f7 c, |+ ^; m' t' n: Ywas at 11 years of age, and her height was at 5 feet
3 l+ Q+ l- l. Y% q7 }5 inches. There was no other family history of pre-2 K1 q2 i+ e6 g2 D/ O9 H8 h% |
cocious sexual development in the first-degree rela-. W4 y! w8 m; O; Y
tives. There were no siblings.4 D2 f% t- ]. Q. Z7 F9 o- H( B! ^
Physical Examination, h0 ^0 ^7 K- L% e9 Y9 ^! N5 z
The physical examination revealed a very active,
O2 }: G% j& _' _# N z% gplayful, and healthy boy. The vital signs documented
/ N6 x- [' L Q; oa blood pressure of 85/50 mm Hg, his length was
, z; x( r( L+ ]3 i& d90 cm (>97th percentile), and his weight was 14.4 kg; s( d" ]& x% F7 Z( T8 b
(also >97th percentile). The observed yearly growth
" k- f$ u! ^3 U2 T( M9 ]velocity was 30 cm (12 inches). The examination of
; O1 Y* D3 }: P! \the neck revealed no thyroid enlargement.! }. D+ s- T6 y1 j' E4 e/ L
The genitourinary examination was remarkable for: a1 c8 q) \* m2 a0 s
enlargement of the penis, with a stretched length of
" w) ?" W g% J; }# p7 A/ {8 cm and a width of 2 cm. The glans penis was very well5 y7 U2 @8 O8 {- g; z, F1 i4 J
developed. The pubic hair was Tanner II, mostly around6 z5 w) U$ \8 G7 ^
5401 T% E. T9 V0 v6 {" I
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% E! S/ q' e/ d$ x4 N0 q
the base of the phallus and was dark and curled. The" P8 N/ Q3 L9 A5 T
testicular volume was prepubertal at 2 mL each.
: {/ N: m! u. D$ f, |The skin was moist and smooth and somewhat. x7 Q6 Q# H2 [. n) }
oily. No axillary hair was noted. There were no
8 v6 u# @/ O6 L" cabnormal skin pigmentations or café-au-lait spots.1 l, m, a# S7 Q/ ^* E. h0 r7 P
Neurologic evaluation showed deep tendon reflex 2+4 Q; d+ Y2 m8 A8 D
bilateral and symmetrical. There was no suggestion4 K' q V2 K2 A
of papilledema.
# y3 V b' d/ Y2 w3 t0 T6 FLaboratory Evaluation( i$ U( ?( C8 }; [3 ]% G5 }& C
The bone age was consistent with 28 months by0 W$ c- ~& l; Q; s$ ]+ @' I
using the standard of Greulich and Pyle at a chrono-4 `1 d, `1 _6 u9 T
logic age of 16 months (advanced).5 Chromosomal
! G, G% M0 O2 P$ B7 C( Skaryotype was 46XY. The thyroid function test9 C: f i- `( i$ [2 `
showed a free T4 of 1.69 ng/dL, and thyroid stimu-4 ^1 Y* L: s2 f' n
lating hormone level was 1.3 µIU/mL (both normal).5 x: o1 `$ w% G
The concentrations of serum electrolytes, blood
2 T: o) m7 Y8 E9 Gurea nitrogen, creatinine, and calcium all were
% r2 t! D Q3 E# A7 T1 H& E) L4 r2 cwithin normal range for his age. The concentration1 E' o! a/ N6 e6 H f, f% K% @
of serum 17-hydroxyprogesterone was 16 ng/dL
9 l+ ]7 T2 k) w6 {/ i' P* q(normal, 3 to 90 ng/dL), androstenedione was 20
0 L' a9 r( W! Dng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-8 @; C# \! D$ z2 E1 c
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
4 M. M z: j+ R! I) `- wdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
0 a% I5 t. _1 c' y/ ?49ng/dL), 11-desoxycortisol (specific compound S)' `: m+ _, X% {$ {" x
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-# e& R# h2 f4 `; ~9 Y1 \4 i1 p
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
, Y7 Q& k( {2 t; r/ E: Ltestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
8 h9 q" L8 P$ |; ^! t' [and β-human chorionic gonadotropin was less than7 C* T& O3 `, |+ e/ O" Z9 C2 W0 ]. i
5 mIU/mL (normal <5 mIU/mL). Serum follicular. ^8 R- ~7 w& L; x" L
stimulating hormone and leuteinizing hormone
- c% |% m a8 u' e4 Gconcentrations were less than 0.05 mIU/mL. N& Y1 J; n- J' z- H y" i
(prepubertal).- j( C& q7 T; y, a( C8 ]5 U1 A$ Z
The parents were notified about the laboratory
; G. i! x" |: T8 K9 s3 r/ eresults and were informed that all of the tests were
* ^- b+ C8 Y: p- z, j. s2 Hnormal except the testosterone level was high. The
. {. e* L, t% y+ r3 `8 ofollow-up visit was arranged within a few weeks to
, C$ }3 U# G) q! C% `5 Oobtain testicular and abdominal sonograms; how-
# w# Y' }! o! A/ A/ f( `+ Kever, the family did not return for 4 months.8 o7 j1 c0 R: ]. x! f
Physical examination at this time revealed that the
) Q+ \) t$ g: m3 }child had grown 2.5 cm in 4 months and had gained
0 B" Q) q8 ]! }0 u2 kg of weight. Physical examination remained
* J) g$ s; C5 X( K) b$ Runchanged. Surprisingly, the pubic hair almost com-
F# X5 D0 o& u7 `8 w; Npletely disappeared except for a few vellous hairs at
, P4 S1 c9 d: c' D; m( b% gthe base of the phallus. Testicular volume was still 2; Y" u6 b5 L8 f
mL, and the size of the penis remained unchanged.
' {* f+ u3 f( l) c6 f8 O- ~The mother also said that the boy was no longer hav-7 L: Q, k4 B, e; [) n
ing frequent erections.# y; g7 x/ H! }* e0 J8 c+ B
Both parents were again questioned about use of
' u j8 M/ d6 r4 P3 lany ointment/creams that they may have applied to8 ]" M: g8 g0 O% k
the child’s skin. This time the father admitted the
9 U! e% ?+ e+ F# X$ Z2 n9 HTopical Testosterone Exposure / Bhowmick et al 5412 \5 n2 H2 Y/ o" v1 z9 X# p
use of testosterone gel twice daily that he was apply-+ ^+ y C+ j7 V3 E& U0 s) a& p
ing over his own shoulders, chest, and back area for e* `! e, p$ b) v$ P8 G) Y( T
a year. The father also revealed he was embarrassed
" P1 k6 V9 q$ @1 V8 Q; wto disclose that he was using a testosterone gel pre-* ?( J. }/ K" R4 v
scribed by his family physician for decreased libido
! @' J7 Q5 f5 k' y9 tsecondary to depression.& k% |. r+ F, [% [' |
The child slept in the same bed with parents.
: j8 h$ [9 B6 v8 l* V+ O/ |The father would hug the baby and hold him on his/ |4 ~. a q% n: w$ V% ?1 P3 @
chest for a considerable period of time, causing sig-
+ S% u4 k) `+ d9 X9 r. Wnificant bare skin contact between baby and father.
- x5 ~# g% R7 {$ V$ A/ |6 aThe father also admitted that after the phone call,
7 v. }8 x% s6 W N5 H. wwhen he learned the testosterone level in the baby- x* W; M' E9 e% G: S
was high, he then read the product information
9 l5 l; _; i. X$ M7 [packet and concluded that it was most likely the rea-. `' ?0 a4 I4 Y @4 v
son for the child’s virilization. At that time, they* z7 Q$ D; o* l1 N
decided to put the baby in a separate bed, and the
; p! `" O* z( i, j. \father was not hugging him with bare skin and had+ h* _/ L! y. j# F
been using protective clothing. A repeat testosterone
( X7 i/ R8 N7 I7 ~8 \test was ordered, but the family did not go to the: `2 {# Y9 ^6 `1 e! P$ \- A
laboratory to obtain the test.
5 n6 Z9 [- T' k5 ?$ J8 }6 U. NDiscussion- i1 T( D9 E; C/ W# A
Precocious puberty in boys is defined as secondary
/ L$ }* @) x3 y8 A, { Xsexual development before 9 years of age.1,4
3 U. T, Q h; x) G" Y4 z" \Precocious puberty is termed as central (true) when* W& o8 L8 @/ y; _7 @
it is caused by the premature activation of hypo-: y2 P/ x) E" ~7 X
thalamic pituitary gonadal axis. CPP is more com-
7 M, v- K# h, ]0 a- u3 \mon in girls than in boys.1,3 Most boys with CPP( ^4 d2 \0 K9 R
may have a central nervous system lesion that is; {; g; q/ i$ T0 x( q# Q; @
responsible for the early activation of the hypothal-! A/ D% d8 n& z# S, s
amic pituitary gonadal axis.1-3 Thus, greater empha-; T" Z! i! q& O4 [
sis has been given to neuroradiologic imaging in3 Z, _. Q+ s4 j; A( r* M
boys with precocious puberty. In addition to viril-& u4 `) p8 `7 q B4 g
ization, the clinical hallmark of CPP is the symmet-
4 g5 X: n5 ?2 Q7 d" G4 Y: @rical testicular growth secondary to stimulation by' V4 H! J! z1 A5 B; N$ o/ _. z. J
gonadotropins.1,39 e2 O- e+ U* u# T% G, P
Gonadotropin-independent peripheral preco-7 `' B& Q+ U: W D3 |
cious puberty in boys also results from inappropriate) P0 f6 U/ b* X. i2 b
androgenic stimulation from either endogenous or
( ]" O# x% O+ Rexogenous sources, nonpituitary gonadotropin stim-
6 O$ O1 M6 b! e( }/ [ulation, and rare activating mutations.3 Virilizing6 }; u) t! i2 w* \. g
congenital adrenal hyperplasia producing excessive
$ b. K, S0 h0 R' k7 y# Oadrenal androgens is a common cause of precocious
" I$ ]6 ?2 g9 `7 D6 l4 Gpuberty in boys.3,45 A% f+ u' }8 u: {9 R+ T5 p
The most common form of congenital adrenal6 X: A# c: ~' e" G; _& Y8 Q
hyperplasia is the 21-hydroxylase enzyme deficiency.: i5 q6 r3 }# m/ L& N
The 11-β hydroxylase deficiency may also result in
# f+ F$ i) T; `' Xexcessive adrenal androgen production, and rarely,
( u* l& F. p. D. F$ l* xan adrenal tumor may also cause adrenal androgen
. V( w1 i# [% H9 @# T8 E" C: Zexcess.1,36 J# _0 C0 I* z8 X' E% w
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from2 L$ ?! h. T$ f1 n0 ~+ q
542 Clinical Pediatrics / Vol. 46, No. 6, July 20076 \* e! b5 x. h5 e$ [
A unique entity of male-limited gonadotropin-
3 ^$ G. i* S% u& N. y1 Eindependent precocious puberty, which is also known
" w- B" K# J/ s+ Las testotoxicosis, may cause precocious puberty at a
9 q6 H4 ~! A# B; K2 Yvery young age. The physical findings in these boys
: K/ U! {9 l4 G/ \with this disorder are full pubertal development,
5 j' M8 s+ p; {: I3 hincluding bilateral testicular growth, similar to boys
# @7 {: m9 b g& O [1 _$ Pwith CPP. The gonadotropin levels in this disorder
+ S1 ?! i6 G- [5 }7 vare suppressed to prepubertal levels and do not show; [4 _, E# `! ]$ w
pubertal response of gonadotropin after gonadotropin-, Y. T, O; d5 `6 i+ b
releasing hormone stimulation. This is a sex-linked/ u; w( F) H$ x+ k& w
autosomal dominant disorder that affects only
8 ^+ t8 [5 x6 d' Y" j. m* [males; therefore, other male members of the family
9 h1 z( f" K1 R0 _1 q. C2 s6 vmay have similar precocious puberty.31 v, l4 n4 a: S6 x( U* j% Q ^! R% f
In our patient, physical examination was incon-; p" S: T) y' w* U4 K. b4 p+ _: }
sistent with true precocious puberty since his testi-
; H1 ~# s1 `. k" C7 k, d0 pcles were prepubertal in size. However, testotoxicosis
0 n, q3 D. D1 K+ Pwas in the differential diagnosis because his father. k$ m8 p* B: P$ M& B
started puberty somewhat early, and occasionally,+ ~/ ]( Z: r L/ U4 g6 F0 W
testicular enlargement is not that evident in the
2 S" m* S8 H2 F Y0 rbeginning of this process.1 In the absence of a neg-
- ~$ n6 I$ M: \. native initial history of androgen exposure, our
- z, k1 u0 W- c; |1 G* v/ Mbiggest concern was virilizing adrenal hyperplasia,8 D+ ^( S& [/ u V
either 21-hydroxylase deficiency or 11-β hydroxylase9 n+ m" S) `; \; |4 X& R
deficiency. Those diagnoses were excluded by find-6 Q) \% p8 G3 w, d2 ^. g9 ^( c
ing the normal level of adrenal steroids.
. S( l0 O2 L$ u% r7 d6 v: @' ^$ FThe diagnosis of exogenous androgens was strongly
# A2 ~$ W. @5 s# I6 Asuspected in a follow-up visit after 4 months because% \0 c+ i6 T- q* r. u+ _( Y7 ?
the physical examination revealed the complete disap-
& w; j0 z& w. v+ w+ Epearance of pubic hair, normal growth velocity, and m' ]/ s8 p5 V3 O+ z( x0 F6 j
decreased erections. The father admitted using a testos-, ^- j1 }" [* q1 T5 c/ ?% _
terone gel, which he concealed at first visit. He was
7 @; k- |. j$ O; ausing it rather frequently, twice a day. The Physicians’7 k9 a4 [7 F: b& W1 k
Desk Reference, or package insert of this product, gel or
! s2 }4 u2 a, d; ^: L9 ~+ A% acream, cautions about dermal testosterone transfer to) R7 W- x6 ]. s: @- z! l0 R
unprotected females through direct skin exposure. e& ~. P m. m6 {9 q% \
Serum testosterone level was found to be 2 times the
$ p* H L! C; tbaseline value in those females who were exposed to
4 v! ?( z/ ?6 H. u% n4 V; aeven 15 minutes of direct skin contact with their male: H* F% y; v8 w8 G
partners.6 However, when a shirt covered the applica-
. R: x9 y. M) {6 {0 B: u& Vtion site, this testosterone transfer was prevented.
+ g {! ?! Q3 n, QOur patient’s testosterone level was 60 ng/mL,' L2 s& s H: D: f" n1 d5 _
which was clearly high. Some studies suggest that
7 @) ?9 K, _; t$ Q. Gdermal conversion of testosterone to dihydrotestos-$ t9 l3 T9 Y& ]# K
terone, which is a more potent metabolite, is more5 X+ b% z$ h u7 K5 q& @0 u5 ]* [
active in young children exposed to testosterone
' w' r! `% n* f5 c/ A. Oexogenously7; however, we did not measure a dihy- n2 |, q4 q' o$ t
drotestosterone level in our patient. In addition to
; o$ y$ X- l8 c6 V$ x" [4 ?6 uvirilization, exposure to exogenous testosterone in
, W# U9 D' D( ~' U2 R: C" z! Y; xchildren results in an increase in growth velocity and, |. Q4 u+ }4 x7 x+ a/ Y3 P3 W
advanced bone age, as seen in our patient.
, F8 e4 p' Q& a/ X! d( p4 nThe long-term effect of androgen exposure during
4 o+ [. H4 h8 `% Oearly childhood on pubertal development and final
5 l4 V9 [" V/ [) c3 ^& f7 }adult height are not fully known and always remain
7 Z! l4 q; G+ I6 va concern. Children treated with short-term testos-3 \$ {3 b. v! Q6 r( Z6 p% P2 [
terone injection or topical androgen may exhibit some/ ?* J6 u6 p0 D1 \
acceleration of the skeletal maturation; however, after' {0 s! B+ C6 |! B* V* v5 K7 c
cessation of treatment, the rate of bone maturation
& j* F+ w' U+ I+ d2 V% u0 t! Odecelerates and gradually returns to normal.8,98 |- w N" x$ [
There are conflicting reports and controversy
: ^$ E0 w# C) Mover the effect of early androgen exposure on adult
- e7 C, i; I" x) k! c0 a# lpenile length.10,11 Some reports suggest subnormal8 }/ F `0 z, l6 k
adult penile length, apparently because of downreg-
- P7 ~1 x. q) k# ?ulation of androgen receptor number.10,12 However,
U" e" I1 T& C# \! T9 _( C0 K4 ESutherland et al13 did not find a correlation between; R, F9 R' \# G# c# v- d! X
childhood testosterone exposure and reduced adult2 W. W8 J6 h: J8 }
penile length in clinical studies.6 L1 x! Z# \5 w: ]( J' D
Nonetheless, we do not believe our patient is% C8 L% W$ m# f0 V3 K
going to experience any of the untoward effects from
! j* X! a, t" H# f( }' Q3 N; r- j9 Utestosterone exposure as mentioned earlier because
) ~, _: z: P: @0 cthe exposure was not for a prolonged period of time.5 q& g/ V1 P# }) j6 z7 J8 d
Although the bone age was advanced at the time of
' C- V9 q& ^$ R3 ?6 P. `( {& v Qdiagnosis, the child had a normal growth velocity at! r! T9 `* P9 a) s- s" Z
the follow-up visit. It is hoped that his final adult
4 s/ I7 U2 I+ B+ q8 Z/ aheight will not be affected.! @5 f' k1 x4 r
Although rarely reported, the widespread avail-
: h$ y. D" ?0 N5 s" S& d {7 jability of androgen products in our society may% E E' i- p; S7 H+ {& C, Q
indeed cause more virilization in male or female1 V* U- V: ^ N" v/ D
children than one would realize. Exposure to andro-/ b, `( ]8 z6 [8 G2 n: F
gen products must be considered and specific ques-
2 k8 u U) s( z& N7 s( O! utioning about the use of a testosterone product or0 o) Z9 V/ `5 \3 r/ F
gel should be asked of the family members during+ |" H3 C/ z( \' J" ?6 I
the evaluation of any children who present with vir- Y2 h, c9 v, Q* b
ilization or peripheral precocious puberty. The diag-
8 h, |# }" f2 c% o+ }# J B @" onosis can be established by just a few tests and by4 v# j. a) c2 e8 B; I x# }: ]
appropriate history. The inability to obtain such a
1 y5 h% e0 C3 _ @9 p0 ^6 hhistory, or failure to ask the specific questions, may, q* M- q! i% w
result in extensive, unnecessary, and expensive- p$ S, W1 H( V4 T s' P
investigation. The primary care physician should be* p( F3 v6 a# V. Z" G
aware of this fact, because most of these children, }! j' v! C8 r* N% B
may initially present in their practice. The Physicians’
9 a! }, ?" w+ M! I4 e8 t6 eDesk Reference and package insert should also put a& Y0 i; V( k9 t4 ?' o: ?
warning about the virilizing effect on a male or# \* S$ [3 H, x- q
female child who might come in contact with some-* _! X- {7 G( A% F+ S! U' A! V' |
one using any of these products.8 V. M5 ^- k! Q3 _+ j6 j
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1. Styne DM. The testes: disorder of sexual differentiation5 m1 q% F& Z" _9 Y
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Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;# d; m7 {" _/ S
2002: 565-628.5 ]3 w& Q: X1 G6 j$ _* ~( ]
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
+ o* ]2 T, ^' `- `7 ppuberty in children with tumours of the suprasellar pineal0 p: }9 x; j" y' B6 e; M5 E
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' G2 w7 b) C2 ^8 @# {+ @areas: organic central precocious puberty. Acta Paediatr.& g2 B$ n' v% z3 E- B* ?+ E
2001;90:751-756.
# c6 ?) A/ E3 c4 @1 R3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
) Z) X1 T' C4 D3 }2 T# nPediatric Endocrinology. 4th ed. New York, NY: Marcel
) C) Z! T' t* T5 PDekker Inc; 2003:211-238.9 e& N/ i- y- S$ n6 K( l
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development in a two-year-old boy induced by topical0 M, ]# {! u2 ~0 r8 g
exposure to testosterone. Pediatrics. 1999;104:e23.0 b M/ P, N: q8 j- F; x
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Skeletal Development of the Hand and Wrist. 2nd ed.
! F) [5 N& C8 a6 ^Stanford, CA: Stanford University Press; 1959.
) x8 {. g" t8 n. S% ~( b7 o6. Physicians’ Desk Reference. Androgel 1% testosterone,
# d& A; H+ V$ `, H' HUnimed Pharmaceutical Inc. Montvale, NJ: Medical$ P- ]9 P7 H) W# G
Economics Company, Inc; 2004:3239-3241.6 g; g8 x) P1 J7 S/ o; ]: B2 I
7. Klugo RC, Cerny JC. Response of micropenis to topical
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