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is a significant concern for physicians. Central5 g2 I3 F$ s' ~ m, f% |
precocious puberty (CPP), which is mediated
- [% K! [: E1 S' ~" k! X; \through the hypothalamic pituitary gonadal axis, has
' Q( o0 n3 b* x0 } b% ra higher incidence of organic central nervous system( B& a. f9 d3 h( Y2 F
lesions in boys.1,2 Virilization in boys, as manifested
0 g; R$ [0 `; d" f2 _9 Dby enlargement of the penis, development of pubic
6 _/ j! `) R1 H8 G& S2 K, mhair, and facial acne without enlargement of testi-8 u9 K+ T( ?# g$ e0 l) q
cles, suggests peripheral or pseudopuberty.1-3 We
* s' t% t+ k, {# ~report a 16-month-old boy who presented with the0 }, @( I% C4 Z1 x# |$ w; x
enlargement of the phallus and pubic hair develop-( q7 B m( g7 {0 }* ?
ment without testicular enlargement, which was due9 W [" [5 l. y( |5 \3 |
to the unintentional exposure to androgen gel used by% B" b# m+ J) z% r: B9 L
the father. The family initially concealed this infor-! d4 C+ l: m4 }$ K
mation, resulting in an extensive work-up for this0 r$ s4 a) p. l
child. Given the widespread and easy availability of
( ]% c' c; G) M: f$ N% Ttestosterone gel and cream, we believe this is proba-
4 m- |/ s/ e) K: D7 y! xbly more common than the rare case report in the
% u c& H; o, E+ Q& d5 Q, m$ Uliterature.4
. o0 G9 D9 r$ G9 mPatient Report1 [! V+ y' w# l/ k$ ^2 r
A 16-month-old white child was referred to the
0 `9 X3 v- Y$ Aendocrine clinic by his pediatrician with the concern$ N/ t3 ^5 ^+ E/ v$ c( ]4 K& z
of early sexual development. His mother noticed4 w6 A2 ?7 \0 Q! o
light colored pubic hair development when he was
, d* ^' x. ]. z3 `7 D6 ?From the 1Division of Pediatric Endocrinology, 2University of* j1 {2 ~* Y" Q% Y; ]" A
South Alabama Medical Center, Mobile, Alabama.( s3 T/ [7 j1 o8 b1 R& ~$ F" C
Address correspondence to: Samar K. Bhowmick, MD, FACE,/ Z' T% X) `3 ^6 G( K
Professor of Pediatrics, University of South Alabama, College of
$ `( J' u o, N4 \( _, Y# XMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;5 G- x* `! y ^4 ~" s
e-mail: [email protected].$ m8 |. o& `2 D6 t7 l* a; x! w* e
about 6 to 7 months old, which progressively became1 r7 l* ?1 K/ Y6 t r; v
darker. She was also concerned about the enlarge-" Y. K6 t9 s. U6 ~
ment of his penis and frequent erections. The child
) z# J( E$ r' k: F" R) D! V7 i$ mwas the product of a full-term normal delivery, with
8 E1 `. z' }- D: e3 [( ]6 v# D1 O) Ra birth weight of 7 lb 14 oz, and birth length of" p# V; u3 f, p" w7 Q( \/ M
20 inches. He was breast-fed throughout the first year
& h# x8 q9 h6 F6 y% n& V! n6 G9 [of life and was still receiving breast milk along with# g6 h; J8 E, ^8 E5 M- X
solid food. He had no hospitalizations or surgery,# p- F/ j: R' E5 v& l
and his psychosocial and psychomotor development
; T7 Y* s( q5 w9 m' q+ Iwas age appropriate., V0 C: x) l2 y( ^8 e, [
The family history was remarkable for the father, l d# ~$ ^ e, h l8 R
who was diagnosed with hypothyroidism at age 16,
2 g' @9 s( \2 F+ @8 p& Rwhich was treated with thyroxine. The father’s
( v6 K8 j# a# E5 Q8 {4 Zheight was 6 feet, and he went through a somewhat/ l4 I/ k. v0 c" x5 W
early puberty and had stopped growing by age 14.
+ U4 Z+ x \) C! _9 E3 s0 ?The father denied taking any other medication. The) h" i" ~. z4 D2 k
child’s mother was in good health. Her menarche
$ L* N$ h* }% U: V5 u; Ywas at 11 years of age, and her height was at 5 feet
% j! m0 x8 F3 m2 I6 [% J5 inches. There was no other family history of pre-* F1 N! o$ \( H9 f) \" ?. R; n
cocious sexual development in the first-degree rela-
. e9 X. o1 n: O1 }tives. There were no siblings.
+ c( o7 c6 c i0 S6 t6 r" ^7 w) XPhysical Examination
% Q( ^& f. X7 m/ \* iThe physical examination revealed a very active,
: j% O S9 h5 t5 b4 Q+ splayful, and healthy boy. The vital signs documented$ ~% C, g3 u* N% M
a blood pressure of 85/50 mm Hg, his length was
$ C) A: p8 Q$ w- m' O; x$ I$ t$ U90 cm (>97th percentile), and his weight was 14.4 kg
1 C+ X9 x7 J! F(also >97th percentile). The observed yearly growth! k2 a, `" |# B
velocity was 30 cm (12 inches). The examination of h2 E" J; R6 C' A% k- c
the neck revealed no thyroid enlargement.
: R7 U+ v) H p$ tThe genitourinary examination was remarkable for
/ d* y/ S( [$ L4 l+ {enlargement of the penis, with a stretched length of
# J7 u( _1 f" X- i8 cm and a width of 2 cm. The glans penis was very well5 X, [" j' C7 z# w$ y$ L2 L
developed. The pubic hair was Tanner II, mostly around9 R( l! Z+ R: Q! M+ V
540
: W2 m! E h; b+ b$ C4 s; f `at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from4 d* ]1 D3 D) I
the base of the phallus and was dark and curled. The
+ H- |- z$ w- c, ?- ytesticular volume was prepubertal at 2 mL each.
9 Z$ w* \$ p; lThe skin was moist and smooth and somewhat
& {' e c5 t+ Z# C5 f+ moily. No axillary hair was noted. There were no& r" F6 G9 R" O: ]5 b
abnormal skin pigmentations or café-au-lait spots.9 H: y4 f2 J# w( ?2 r% j
Neurologic evaluation showed deep tendon reflex 2+1 |9 Q. N* ~) Z: k
bilateral and symmetrical. There was no suggestion' ^* r* F7 `0 y8 H
of papilledema.
5 d- Z) y/ f9 ^, z& u4 `/ L+ YLaboratory Evaluation+ Q* L% C4 w, n. ^6 E
The bone age was consistent with 28 months by4 o5 \7 F8 M) p$ O9 A7 [5 |
using the standard of Greulich and Pyle at a chrono-
+ z2 F. G1 ?3 S; e) \8 h5 G) ^logic age of 16 months (advanced).5 Chromosomal
4 U- [; d' R6 B) {6 `+ Skaryotype was 46XY. The thyroid function test
; q5 u8 d- U. ?* ~/ U% X* Mshowed a free T4 of 1.69 ng/dL, and thyroid stimu-3 J1 d2 k/ y( a( v1 d5 p/ m
lating hormone level was 1.3 µIU/mL (both normal).3 G* y) y" ?% Y+ W
The concentrations of serum electrolytes, blood# U8 v* E# P: L7 K$ a, C
urea nitrogen, creatinine, and calcium all were
2 V$ D' I8 s- o I* \9 x0 w6 g! E4 ]within normal range for his age. The concentration
$ B5 S% R* R. J3 bof serum 17-hydroxyprogesterone was 16 ng/dL. E; J R0 D! `& i3 v' c; z- v
(normal, 3 to 90 ng/dL), androstenedione was 20; \# o% X# m. X. S$ d
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
% ~9 r" M: H$ N& k( ]+ m: ?terone was 38 ng/dL (normal, 50 to 760 ng/dL),) ^5 i. `% @' F m6 B
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
/ t: |! L: H( j I, `49ng/dL), 11-desoxycortisol (specific compound S)
+ @8 \1 Y! _6 C% g5 {was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
% H( Y3 l8 C- b% E. K- c' [tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
2 }+ F$ h/ j8 w6 v" ktestosterone was 60 ng/dL (normal <3 to 10 ng/dL),$ C3 D$ q9 O) b
and β-human chorionic gonadotropin was less than' k# x9 r# i# n3 _* _* s
5 mIU/mL (normal <5 mIU/mL). Serum follicular
/ ?$ J+ H5 b$ i3 ?: d& r$ D1 Lstimulating hormone and leuteinizing hormone/ e! s; x% ^! @, ~0 \: K+ q* C, ^
concentrations were less than 0.05 mIU/mL
" h3 _3 U4 X S. |4 X. U(prepubertal).
' S4 R1 s5 Q$ r7 B0 y6 {9 {0 uThe parents were notified about the laboratory
- C% Q8 U) N) Gresults and were informed that all of the tests were) C/ G6 y0 u1 Q6 P; O2 Q8 S# l
normal except the testosterone level was high. The
A2 l: d9 b8 G. s1 Z/ }follow-up visit was arranged within a few weeks to! X" L7 N3 J& r$ q( ~! b
obtain testicular and abdominal sonograms; how-3 e1 }/ [7 v" y# w+ c
ever, the family did not return for 4 months.
' R, m! _. z# ^Physical examination at this time revealed that the
" l8 Q( [; h+ j. s) D) T# W) x9 Qchild had grown 2.5 cm in 4 months and had gained
- L' @) j q8 g8 }/ Y# }2 kg of weight. Physical examination remained1 s+ z% R0 H c- Q( c1 B
unchanged. Surprisingly, the pubic hair almost com-
( w4 @7 z! C/ h- G& hpletely disappeared except for a few vellous hairs at0 Z ]9 u5 ?7 ?# }, {# s9 ~- ^+ _
the base of the phallus. Testicular volume was still 25 ]3 F5 j8 T4 V$ J0 \
mL, and the size of the penis remained unchanged.
# D2 ^; F1 l1 a2 u+ R2 `6 A; ]* ^The mother also said that the boy was no longer hav-
* M0 E( v3 X" y+ f* a: Sing frequent erections.$ J2 e# ^6 b6 k v% h
Both parents were again questioned about use of
( l! s, m$ l$ y5 R d. eany ointment/creams that they may have applied to
4 Y1 \$ S3 N" n1 S" r" ^the child’s skin. This time the father admitted the, b2 K4 H/ Y* X9 C5 I' ^
Topical Testosterone Exposure / Bhowmick et al 541
6 g# S, F3 E6 C% n9 E- ouse of testosterone gel twice daily that he was apply-
2 m/ r1 M) T5 _/ Wing over his own shoulders, chest, and back area for
6 a" a+ F, b; Na year. The father also revealed he was embarrassed5 }3 h) m3 ^6 v( ?+ A% h0 I9 O
to disclose that he was using a testosterone gel pre-7 E' t8 ]1 p2 U, ~( c
scribed by his family physician for decreased libido
# r2 e) t& `) q( K$ T* H: Gsecondary to depression.
1 Z' C; ^3 T' C7 VThe child slept in the same bed with parents.' ^, S) F4 v+ a
The father would hug the baby and hold him on his- L' \2 [5 s. Y7 e; r6 n
chest for a considerable period of time, causing sig-5 I, o' q) m) L3 y, ^
nificant bare skin contact between baby and father.
6 U6 G9 Y5 N8 P! R* |$ HThe father also admitted that after the phone call,2 s; p' N& t) ~& z
when he learned the testosterone level in the baby
6 a4 d( }5 E; y2 Qwas high, he then read the product information, k5 L+ Y$ y2 q0 E, z
packet and concluded that it was most likely the rea-: B5 E4 V5 O0 T& D2 @
son for the child’s virilization. At that time, they
- \- D3 v9 d# G6 Z3 v8 A8 A+ edecided to put the baby in a separate bed, and the# x, Y# E9 W) n/ X0 a4 Y7 _
father was not hugging him with bare skin and had0 r5 C5 D& m3 S8 z& t
been using protective clothing. A repeat testosterone6 v* B/ E l3 L) c
test was ordered, but the family did not go to the- y6 ]" R; ^ ] R
laboratory to obtain the test.
' q9 q( c( G9 F9 P' SDiscussion
+ x" T5 v. |) `' T9 |5 \/ C/ v `Precocious puberty in boys is defined as secondary$ K1 G! s* @; j
sexual development before 9 years of age.1,4
, Z6 c* G; M) b$ N3 {( K& w5 y; MPrecocious puberty is termed as central (true) when0 v& H: c/ P: j V7 ]
it is caused by the premature activation of hypo-
2 x: s& |2 H4 \; E6 s! k# Qthalamic pituitary gonadal axis. CPP is more com-
! R- n! C* z8 h. X T( @! Zmon in girls than in boys.1,3 Most boys with CPP
' R6 R+ [. e9 ~may have a central nervous system lesion that is
) O' b3 N0 m. e$ \; }$ A2 I( J: M. Wresponsible for the early activation of the hypothal-5 Z W) k' a. ]
amic pituitary gonadal axis.1-3 Thus, greater empha-& ?' t0 R/ E" A& h O! O
sis has been given to neuroradiologic imaging in
4 f, e1 r& |) k' v% ]9 v; o' M3 M4 eboys with precocious puberty. In addition to viril-
0 d+ z1 r$ o3 Aization, the clinical hallmark of CPP is the symmet-9 o. H s" Q# g. \; p ]' T5 V
rical testicular growth secondary to stimulation by
# n4 z# I& Z+ ?3 t9 @$ v' p6 ygonadotropins.1,3
# Y6 [$ x" N7 g! ]Gonadotropin-independent peripheral preco-
5 u6 V4 _9 _8 F- \% i2 Pcious puberty in boys also results from inappropriate" N) J! g2 F- F2 g6 v
androgenic stimulation from either endogenous or
) W$ j8 q9 x8 K% ]' C- jexogenous sources, nonpituitary gonadotropin stim-
. y6 p8 u' {" {: H2 D5 O* tulation, and rare activating mutations.3 Virilizing
6 ]& y8 O$ s* ~% H# n( |- A; M" {congenital adrenal hyperplasia producing excessive1 A0 Z$ @6 F* g( B3 u" N% N3 R
adrenal androgens is a common cause of precocious* P9 K% b( S' d j$ m, M5 a+ d% O
puberty in boys.3,4" e- h4 ?" v! \. o1 a, v
The most common form of congenital adrenal
9 E$ i4 _7 P# z/ W( Khyperplasia is the 21-hydroxylase enzyme deficiency.
6 r9 `" D K2 j: R" P3 w# eThe 11-β hydroxylase deficiency may also result in
4 U R5 S) ^- Z9 I+ Mexcessive adrenal androgen production, and rarely,, R5 a. k. V0 }. ^6 O1 U0 |2 p
an adrenal tumor may also cause adrenal androgen9 n3 p: l j/ a9 V) H. Y
excess.1,3
7 L2 J* Q0 d3 k* ` Q* Yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from2 `8 M( o; k0 M7 q1 s
542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 d' ?" E% t; v! g' I+ r2 [4 g- N
A unique entity of male-limited gonadotropin-
6 \+ k8 |+ U$ M1 _4 {independent precocious puberty, which is also known
8 v+ i5 M# z5 `as testotoxicosis, may cause precocious puberty at a
; M1 f$ c: i6 ~$ }7 nvery young age. The physical findings in these boys
2 z! {$ j' Y4 m( Hwith this disorder are full pubertal development,
$ V5 V; Z! z& s5 P' u9 h5 Bincluding bilateral testicular growth, similar to boys
" I- O1 g; s2 ^/ ^' P; Iwith CPP. The gonadotropin levels in this disorder
# M7 b ] }. y6 O8 y) fare suppressed to prepubertal levels and do not show
" d4 D& q; j/ c" h, z" `. dpubertal response of gonadotropin after gonadotropin-
9 ^/ J- ^, \8 S; R' o T) xreleasing hormone stimulation. This is a sex-linked. u0 k/ E9 G" ?* W( { ~
autosomal dominant disorder that affects only
" s6 I- Y6 @; b; A7 X5 W" L! V) kmales; therefore, other male members of the family+ m* N( F# y1 L& t ~
may have similar precocious puberty.3
7 t; R6 n- P+ k& C7 ]+ x6 P$ P% \In our patient, physical examination was incon-
6 o4 `) I2 s( c5 y4 l/ `9 r' nsistent with true precocious puberty since his testi-" r; B/ t( N0 n
cles were prepubertal in size. However, testotoxicosis \( p/ `% o+ Z( L2 g
was in the differential diagnosis because his father: A4 T# D2 Y' }
started puberty somewhat early, and occasionally,( r5 U. K- e: e& O& \
testicular enlargement is not that evident in the4 K6 r! G/ a6 h) h5 `" K$ k
beginning of this process.1 In the absence of a neg-5 p* t8 |: ]* l( @
ative initial history of androgen exposure, our
) s/ u) d9 L9 Ibiggest concern was virilizing adrenal hyperplasia,
/ t: n" w% G2 S' d: deither 21-hydroxylase deficiency or 11-β hydroxylase. U) W6 Z4 b6 }* N6 |5 D$ J% g
deficiency. Those diagnoses were excluded by find-% B" E0 i2 \4 t, H$ U2 ~ ~% P4 @& e
ing the normal level of adrenal steroids.
: f# X4 H0 F6 A, o6 I; w" TThe diagnosis of exogenous androgens was strongly
- P2 a# p- u+ P' ^suspected in a follow-up visit after 4 months because6 C3 T3 o- D5 c- p0 O4 I% x5 h
the physical examination revealed the complete disap-/ h/ M$ n. w' c% a
pearance of pubic hair, normal growth velocity, and) {- K7 X" ~0 W& @% W$ }3 {
decreased erections. The father admitted using a testos-3 ]. g2 [' f+ Q6 t+ w- c( O$ `5 l# f
terone gel, which he concealed at first visit. He was; f5 v1 X8 s8 C. u$ K8 `8 N# k7 Z
using it rather frequently, twice a day. The Physicians’1 ?7 m8 @& @& N5 u2 M; i
Desk Reference, or package insert of this product, gel or. H6 u# l1 t* G. H4 i; ~& f: T
cream, cautions about dermal testosterone transfer to
" a' [- g' I4 \7 G8 D* Sunprotected females through direct skin exposure.
?- Q* ^; D' Z4 w* g6 NSerum testosterone level was found to be 2 times the# v3 O8 o& Q$ N9 d1 D
baseline value in those females who were exposed to+ U! T3 v" t$ Q k2 D
even 15 minutes of direct skin contact with their male
7 e: [8 h0 v# O! ^partners.6 However, when a shirt covered the applica-0 D* q' C* i+ V* d1 O/ P
tion site, this testosterone transfer was prevented.& V+ H* [# z5 V
Our patient’s testosterone level was 60 ng/mL,& u7 R9 R" J E% _
which was clearly high. Some studies suggest that
) g N( A1 E' W" Ydermal conversion of testosterone to dihydrotestos-
/ g( M- y8 A" e3 t) F, Kterone, which is a more potent metabolite, is more, x; S% m t1 a j* y
active in young children exposed to testosterone
& e7 w. {* ?+ s. l0 P5 s0 j$ v3 Qexogenously7; however, we did not measure a dihy-
& P* l2 m( U7 y! udrotestosterone level in our patient. In addition to* @9 k: d& x2 M8 f! e/ K
virilization, exposure to exogenous testosterone in
& p; E' u M' Z' K, ?' bchildren results in an increase in growth velocity and
" A i* X* P) sadvanced bone age, as seen in our patient.8 y/ ^; Y1 H1 M4 V5 {0 F8 t. i
The long-term effect of androgen exposure during8 d. k& o% S- h4 g6 I6 r/ h( U
early childhood on pubertal development and final
* |; R9 _ J+ C5 h4 V( e8 Aadult height are not fully known and always remain
% `& S: }! D: Oa concern. Children treated with short-term testos-
4 x- k5 `! G* o/ ?4 C: nterone injection or topical androgen may exhibit some
1 A6 y5 Y1 {: C7 e! f: {" Z# Zacceleration of the skeletal maturation; however, after
/ {1 G" v1 d/ p0 S; _- g' Ycessation of treatment, the rate of bone maturation. r# ^. O$ ^; a/ j
decelerates and gradually returns to normal.8,9
3 h/ w" Q* Y4 l& n; BThere are conflicting reports and controversy
2 q# a2 v4 `% w3 a/ ~6 @, Q. Bover the effect of early androgen exposure on adult' U/ R5 Y N& Y* _. N
penile length.10,11 Some reports suggest subnormal
" h; L- y' S; D* F7 X$ Aadult penile length, apparently because of downreg-& K4 Z) Z( b2 N6 S
ulation of androgen receptor number.10,12 However,
: {2 ~" @" p7 H1 _# z# aSutherland et al13 did not find a correlation between
0 I/ n" {& J2 Y" ^: Fchildhood testosterone exposure and reduced adult7 i: Y6 E, z8 o5 ?; g
penile length in clinical studies.
! }9 ?- ]( e+ M8 X) E3 ^2 eNonetheless, we do not believe our patient is8 m9 _0 @+ n. e7 Y+ ]" i2 f
going to experience any of the untoward effects from0 ^% J3 v2 U2 j4 x5 q" O% M
testosterone exposure as mentioned earlier because; Y# u5 z3 J$ E; }
the exposure was not for a prolonged period of time.% N+ g3 I* u/ }+ }
Although the bone age was advanced at the time of
! Z. I8 i% V' U4 n; ` d' p+ ndiagnosis, the child had a normal growth velocity at
) y8 F( }" @% ?the follow-up visit. It is hoped that his final adult
) l2 B' G. I% T4 Jheight will not be affected.; ~ b% [# ^2 I# v" B6 ^4 E, G) w& K
Although rarely reported, the widespread avail-
; P' d( x1 X% H. L2 V! ~1 y hability of androgen products in our society may$ U2 H4 n" @5 q& J b0 x& p
indeed cause more virilization in male or female
7 e: Y& o# }' Z2 \children than one would realize. Exposure to andro-8 y5 t- a) r+ P, g+ A( n7 I
gen products must be considered and specific ques-4 V) t6 n1 Q' [; X4 Q
tioning about the use of a testosterone product or& \9 X5 u) Y% V; t+ J5 ^
gel should be asked of the family members during
# h$ k; }# r2 }& I9 J2 B* Zthe evaluation of any children who present with vir-
; w0 ~6 ^1 A; w! Wilization or peripheral precocious puberty. The diag-& V a1 @) E* `! P* I- H/ Q _8 }
nosis can be established by just a few tests and by
9 ^$ P+ |8 h: s. @. f5 Lappropriate history. The inability to obtain such a0 p4 N$ K: z# x) }( A8 }# t7 y
history, or failure to ask the specific questions, may
3 u! q. y% @( M9 _1 cresult in extensive, unnecessary, and expensive5 r/ e. L Y3 x* A, d
investigation. The primary care physician should be" ]1 g! \% F# ?) U9 W& ^
aware of this fact, because most of these children
+ b, x! D: k4 `% i" n4 xmay initially present in their practice. The Physicians’$ d; W! w0 L/ T- P7 T- D
Desk Reference and package insert should also put a
* ?( L" S6 G0 B3 t) z& ^7 B1 H; U# z Awarning about the virilizing effect on a male or
) v! a2 l% f1 K% Tfemale child who might come in contact with some-& D7 i' v! U( k4 s
one using any of these products.
( S5 H$ S4 ?/ z, YReferences: ~% \6 q& \/ x. }) E
1. Styne DM. The testes: disorder of sexual differentiation
, V' P. `" V' l( h% O/ |, O: \and puberty in the male. In: Sperling MA, ed. Pediatric+ }' H8 r% U3 n+ `$ n/ ]: U
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
o6 N' c( D! O7 I* X2002: 565-628.4 n a0 o7 D. q4 [. w* K' e3 L5 S
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
+ t0 E7 T3 }) q8 Tpuberty in children with tumours of the suprasellar pineal
: E: ^" r% x/ y! u& J5 ]7 h- C8 oat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
% w2 R7 _! @0 l! STopical Testosterone Exposure / Bhowmick et al 543+ U' [! @" _9 c
areas: organic central precocious puberty. Acta Paediatr.* B( S- U" i( ]# k3 k& C
2001;90:751-756.) f; S1 q* A6 \7 s
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.1 F W' M7 |8 |
Pediatric Endocrinology. 4th ed. New York, NY: Marcel8 R$ X0 R4 C: `% i- [
Dekker Inc; 2003:211-238.
! \/ Y# ]0 Y# u4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual5 m4 L0 d" {! L$ C8 v9 ?6 i! N
development in a two-year-old boy induced by topical- D/ J; z3 q7 h$ s& \0 O
exposure to testosterone. Pediatrics. 1999;104:e23.0 v# P! m; v* M ?
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of; G3 C3 Y! u5 g- K; h8 y% D- z' x) {
Skeletal Development of the Hand and Wrist. 2nd ed.
6 {; o7 i+ ^! I c6 IStanford, CA: Stanford University Press; 1959.
, m* [1 m' B1 u$ P" a6 c& M. Y6. Physicians’ Desk Reference. Androgel 1% testosterone,% C( l; H4 e3 Z4 j1 P
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
+ B. g8 q2 p3 q! Q% S$ m5 _ {Economics Company, Inc; 2004:3239-3241. z; R" h1 E% q- W* O
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