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is a significant concern for physicians. Central8 O# [ _$ F o) q
precocious puberty (CPP), which is mediated6 b' H4 a* F6 C" N
through the hypothalamic pituitary gonadal axis, has; I/ ~6 b) e: y2 l7 F
a higher incidence of organic central nervous system
8 j8 B% K+ u* i* e8 R- Mlesions in boys.1,2 Virilization in boys, as manifested" V& G& x! s! N. j+ T& T
by enlargement of the penis, development of pubic
; W* \% q3 M; [7 t1 B$ k* ?hair, and facial acne without enlargement of testi-
3 F: f' b8 ~$ m, h8 _0 x" k% E+ [+ wcles, suggests peripheral or pseudopuberty.1-3 We
6 L2 T, _$ P- s6 Z# }- z1 T/ _report a 16-month-old boy who presented with the
2 `5 z* w, K! d5 U1 A( s- x3 Denlargement of the phallus and pubic hair develop-/ F; {0 N$ T2 k0 [# H. K. S
ment without testicular enlargement, which was due( l& y( l$ |- `8 j ^% R1 G
to the unintentional exposure to androgen gel used by% Q' b. Q; R8 u; t( w' H f
the father. The family initially concealed this infor-
. \+ g" z6 S& m, r- @) b4 vmation, resulting in an extensive work-up for this) P. f$ R8 ]" H: ~% U
child. Given the widespread and easy availability of
. a5 S' w& f) b0 stestosterone gel and cream, we believe this is proba-: Z6 x$ m. u& @- f7 R
bly more common than the rare case report in the
- c& W' i6 y/ R6 X3 P! Y% X+ uliterature.4( i1 m1 }3 K4 A" Y+ E
Patient Report, k6 y0 A$ I5 J" N
A 16-month-old white child was referred to the4 X9 d5 t+ K1 o o4 }# d
endocrine clinic by his pediatrician with the concern2 u7 E' G! s2 L4 n# ]4 e
of early sexual development. His mother noticed K$ j* y# u9 [& _' }
light colored pubic hair development when he was. S8 g8 m. @* X }% u
From the 1Division of Pediatric Endocrinology, 2University of
" @4 k; T: h# Z' u& Y3 nSouth Alabama Medical Center, Mobile, Alabama.8 t* C2 Z& s: q ~
Address correspondence to: Samar K. Bhowmick, MD, FACE, c1 c& o! [; h% y8 C
Professor of Pediatrics, University of South Alabama, College of% L* b1 `6 T4 I, Q% T) |1 K( W5 s
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;5 K# Z' b G, t4 L
e-mail: [email protected].
7 ]& G. w5 D0 F! J$ Kabout 6 to 7 months old, which progressively became4 P$ M- [* Y, z+ U1 h; {
darker. She was also concerned about the enlarge-; \7 o6 A8 j& ~1 G
ment of his penis and frequent erections. The child5 t3 Q P$ ?! n) R; I- u, u2 t
was the product of a full-term normal delivery, with
3 c6 ?4 o8 X! ja birth weight of 7 lb 14 oz, and birth length of3 h& F" N3 P6 d. H+ g( H7 F+ U7 B
20 inches. He was breast-fed throughout the first year9 Z$ k8 P c# O1 x" b+ [
of life and was still receiving breast milk along with
! d& s5 o& `1 L! e- ?3 nsolid food. He had no hospitalizations or surgery,
4 ?3 g7 u9 U* {) c. cand his psychosocial and psychomotor development
9 q* V% ^0 n; Z! V' x5 }/ Fwas age appropriate.
/ |: d' E2 k2 cThe family history was remarkable for the father,4 ^ p. P1 m6 i6 j1 X8 W
who was diagnosed with hypothyroidism at age 16,
8 \5 t+ e' P j( g. M% Gwhich was treated with thyroxine. The father’s
) b8 O/ z" M) ?7 O1 f7 Q8 E! u& T. ]height was 6 feet, and he went through a somewhat, j6 b) a2 d* t# _+ I
early puberty and had stopped growing by age 14.$ b3 j! e- p. Z5 \) f- A4 ^- M5 n
The father denied taking any other medication. The
8 P+ u4 W- c- S9 tchild’s mother was in good health. Her menarche
* H: Q; @3 a' b u; ~was at 11 years of age, and her height was at 5 feet
) A# s) Z# f8 i( _5 inches. There was no other family history of pre-4 Z6 _* w7 G8 Z2 h* ?8 V
cocious sexual development in the first-degree rela-2 K3 ~2 W3 h- V3 b3 E) x8 O" f
tives. There were no siblings.
$ m B; M$ \% W' ?( \" D3 C) D" p3 W1 KPhysical Examination
" W1 i" m4 ?& q& U7 w! T+ EThe physical examination revealed a very active,
! h2 G3 i/ G( F" `' F4 b# nplayful, and healthy boy. The vital signs documented
, x: ~ l1 }) o- va blood pressure of 85/50 mm Hg, his length was- W+ J# g; F5 i$ n: B. A. ~
90 cm (>97th percentile), and his weight was 14.4 kg
( ]; J4 {- l0 S/ j A; g k(also >97th percentile). The observed yearly growth$ O. N" O g6 i
velocity was 30 cm (12 inches). The examination of* L4 W6 ?- I/ _$ s9 d
the neck revealed no thyroid enlargement.
% o9 P% c: a3 m' H% IThe genitourinary examination was remarkable for4 J: _/ x* Q e/ e6 g) L
enlargement of the penis, with a stretched length of$ v0 k( h/ J- N' k- D c8 X7 V
8 cm and a width of 2 cm. The glans penis was very well3 c! f5 F8 A2 Y& S3 C9 Y
developed. The pubic hair was Tanner II, mostly around6 ~* L( Q% j) z% O' d1 `
540
/ U: ^+ f3 x& h. |6 B% Xat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ i5 [( J; O& P& h! ]! X6 }" n- Wthe base of the phallus and was dark and curled. The- U. X8 f: S" o6 i- c2 j) k
testicular volume was prepubertal at 2 mL each.
( ?& _8 b; L& `9 [5 ~The skin was moist and smooth and somewhat
8 i+ ` ?0 k1 ^; Q# X; ?oily. No axillary hair was noted. There were no9 T7 z( F* \8 ]( d$ P
abnormal skin pigmentations or café-au-lait spots./ N/ c. H. \. X2 h: O
Neurologic evaluation showed deep tendon reflex 2+
3 j* R( p+ o8 }3 H9 _5 dbilateral and symmetrical. There was no suggestion- N& l- ], N4 U/ m0 z( b8 T5 l
of papilledema.1 t- f6 o A( _0 q9 h) {$ s
Laboratory Evaluation- O$ H7 @: C1 }% k, k2 v6 V# |
The bone age was consistent with 28 months by& n/ _9 K Y; L3 `
using the standard of Greulich and Pyle at a chrono-
4 R! }/ O1 B, ~: }/ O% g/ jlogic age of 16 months (advanced).5 Chromosomal
& K1 E: l: P. Rkaryotype was 46XY. The thyroid function test
* z) @, {+ I3 @4 M* b$ Vshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
6 Z, a8 Z' ] d" @1 I5 y! }* clating hormone level was 1.3 µIU/mL (both normal).
' d4 U) M& |7 A J2 g1 UThe concentrations of serum electrolytes, blood S% D Q1 q6 s
urea nitrogen, creatinine, and calcium all were8 q; Z; o) l4 R& e& q3 {
within normal range for his age. The concentration% {" t7 g' V, ?0 x+ p
of serum 17-hydroxyprogesterone was 16 ng/dL
; ^3 b/ J0 N3 g3 ~( j9 j+ ]% Y) D$ U3 T(normal, 3 to 90 ng/dL), androstenedione was 20
" l* g5 r+ F4 x& @2 C" Ung/dL (normal, 18 to 80 ng/dL), dehydroepiandros-; e% L9 `3 @2 H" }8 u
terone was 38 ng/dL (normal, 50 to 760 ng/dL),7 N% S# q0 k t6 }9 M( L
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
" U/ O4 y& W6 ]49ng/dL), 11-desoxycortisol (specific compound S)
6 x' i. A z1 y! nwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
; Y7 ]6 k; j: Q' etisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
1 o9 @1 t7 u6 n/ A& @testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
! F' i* T- z! ~" V3 Yand β-human chorionic gonadotropin was less than
7 p' `$ _; r9 ]; \( t5 mIU/mL (normal <5 mIU/mL). Serum follicular
& E9 u6 x! ?$ G( |' c( qstimulating hormone and leuteinizing hormone
7 l( z1 w5 L: V: q3 W; Fconcentrations were less than 0.05 mIU/mL8 r# ?6 d. L( m6 a1 o% s( w6 e3 I. b
(prepubertal).
5 p1 n3 k R, c3 `The parents were notified about the laboratory
! {: \' @# Z7 T0 f& Uresults and were informed that all of the tests were g, e6 F+ A6 _ B) g
normal except the testosterone level was high. The3 B6 ]2 r. f) Q; }4 v h/ T F
follow-up visit was arranged within a few weeks to
3 e% \+ ~' P- cobtain testicular and abdominal sonograms; how-6 l( A/ Z2 m# ]. N
ever, the family did not return for 4 months.# v9 V5 e: Q& ~% D+ M' F
Physical examination at this time revealed that the U9 i5 h; r8 q+ ~$ {
child had grown 2.5 cm in 4 months and had gained; n5 b& l4 l- o, X. t, n J2 r
2 kg of weight. Physical examination remained a+ L( k" h6 p7 _' o+ y( Y
unchanged. Surprisingly, the pubic hair almost com-9 o& Z6 J9 b4 P, Y1 I
pletely disappeared except for a few vellous hairs at; n; W6 M. e' N2 a2 P/ }
the base of the phallus. Testicular volume was still 21 k! U: U& d, g6 {3 Z/ |8 f
mL, and the size of the penis remained unchanged.
+ f; D, e7 ?, EThe mother also said that the boy was no longer hav-7 S3 B1 _* H; v, s, q
ing frequent erections.
. C' T0 x1 v6 W: b0 s GBoth parents were again questioned about use of T3 K' ^$ x: b& P+ M
any ointment/creams that they may have applied to
, u$ y4 {& i* C+ Kthe child’s skin. This time the father admitted the4 W8 J% U# s1 o, V! ?
Topical Testosterone Exposure / Bhowmick et al 541
4 W$ a# D2 H* K! ^3 I' t* |, J Ouse of testosterone gel twice daily that he was apply-
! i# A. U" U/ Ling over his own shoulders, chest, and back area for
2 L3 m, t/ e) R) Q. _5 g! z4 s$ Ba year. The father also revealed he was embarrassed
4 E3 V: [0 w# W- {. p7 Yto disclose that he was using a testosterone gel pre-
" O# ^7 j; _4 `/ d- K& \- {$ l6 xscribed by his family physician for decreased libido, W" d( _' T- e _) w
secondary to depression.
1 _: [; I( f# |& n! s; t8 P# kThe child slept in the same bed with parents.3 F8 z/ Q( ~2 k" [1 z
The father would hug the baby and hold him on his
; f7 k9 c# J; b P# a. Gchest for a considerable period of time, causing sig-
! B( |9 ^5 W$ x$ h0 V! {, B/ D1 k" Bnificant bare skin contact between baby and father.% D: M/ h( m5 e) z0 w
The father also admitted that after the phone call,
/ K/ K8 |# d* v- B! _& u' kwhen he learned the testosterone level in the baby
( k" L* V1 C+ P( Twas high, he then read the product information5 q7 `+ u' B) O5 x* E
packet and concluded that it was most likely the rea-
4 j8 Z' F% }% m% i! K3 Dson for the child’s virilization. At that time, they
5 O4 O" X1 V9 E4 wdecided to put the baby in a separate bed, and the
2 a$ a V9 t" @7 _father was not hugging him with bare skin and had
+ _2 O7 Z6 L' `been using protective clothing. A repeat testosterone
) a# G! ~' q9 e6 [+ D8 g0 a) [test was ordered, but the family did not go to the
& F$ A- H% a# T. j9 Dlaboratory to obtain the test.
' f# S" @# e; R$ [% N6 k8 W+ zDiscussion
' q$ m) X% m( T7 a8 `% C6 \Precocious puberty in boys is defined as secondary
$ f |' K; ~, H% H7 Q& jsexual development before 9 years of age.1,4* @3 A2 O) r- u# K7 [" r
Precocious puberty is termed as central (true) when" A. N! k6 s' ?! L0 H, s. Z
it is caused by the premature activation of hypo-
; l2 P; W s! j6 o" w5 hthalamic pituitary gonadal axis. CPP is more com-* A/ @" M3 _- {0 B
mon in girls than in boys.1,3 Most boys with CPP. p0 h" Q6 |' z2 z
may have a central nervous system lesion that is. c3 h8 _8 N a: \
responsible for the early activation of the hypothal-
; D8 z( Y" h0 Qamic pituitary gonadal axis.1-3 Thus, greater empha-
$ [; D% a9 I" s. Psis has been given to neuroradiologic imaging in
$ { K# E: { f. M8 ?! b' Vboys with precocious puberty. In addition to viril-$ q* ], x7 s* `8 p; L$ J' v
ization, the clinical hallmark of CPP is the symmet-0 i4 q' N0 y/ s9 ]4 i
rical testicular growth secondary to stimulation by& {" H* c0 k$ `5 t" P& G3 n
gonadotropins.1,3' c' J j5 T/ g0 Q1 @6 K, C. L; J
Gonadotropin-independent peripheral preco-4 S% u( r2 l5 Z! O: a. N% G: \
cious puberty in boys also results from inappropriate
, g6 f8 @4 P$ h" [0 [" [androgenic stimulation from either endogenous or" z$ T8 B, D! {8 F! y, ?
exogenous sources, nonpituitary gonadotropin stim-2 r& V" B0 G! J3 I/ k2 }$ C
ulation, and rare activating mutations.3 Virilizing
) }. Z0 a) ]) V2 K0 bcongenital adrenal hyperplasia producing excessive
4 ]. M' \8 t, [- }$ ~adrenal androgens is a common cause of precocious% X i5 }8 [- `( j: E/ }9 ~9 T$ ^
puberty in boys.3,4
7 z) m3 J- D9 P) TThe most common form of congenital adrenal) u! A6 y8 y6 D4 r" N
hyperplasia is the 21-hydroxylase enzyme deficiency.+ a# y' F6 c: T3 a$ p- ^9 H, L) V
The 11-β hydroxylase deficiency may also result in
+ X2 c5 l1 h7 f0 Mexcessive adrenal androgen production, and rarely,& c) B2 B5 m w. Z0 o' v* v
an adrenal tumor may also cause adrenal androgen
% ~ l5 s" r! O% }0 D. ~3 J: mexcess.1,3
0 v/ N) m1 x/ h" f* b( L: ~at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( T! G# w( ]4 P3 H$ I4 n
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007) ~0 @$ h* e$ z0 v% R7 ^1 g1 ~# K W
A unique entity of male-limited gonadotropin-
8 B2 K7 F+ C/ qindependent precocious puberty, which is also known
7 c3 O$ ?; V3 \$ z% J+ tas testotoxicosis, may cause precocious puberty at a& c% \5 i5 d( g0 ]8 a* U$ D
very young age. The physical findings in these boys, V2 k% S' _+ K( g7 h
with this disorder are full pubertal development,
& D5 [! B8 T5 S( L! @, tincluding bilateral testicular growth, similar to boys
( }' k4 j+ t2 V% wwith CPP. The gonadotropin levels in this disorder3 ^! e* }) J* m
are suppressed to prepubertal levels and do not show% }: l/ A+ Z( n' u
pubertal response of gonadotropin after gonadotropin-
# c6 T4 Y9 n* e: ureleasing hormone stimulation. This is a sex-linked
0 o$ {( f9 G. l+ Z `* z+ vautosomal dominant disorder that affects only) t* S* j5 u& i" V% H+ d+ Q
males; therefore, other male members of the family0 [: w9 E* H5 Z% {$ V( Q* Y( S" D
may have similar precocious puberty.3
3 l3 W) t! |, G- BIn our patient, physical examination was incon-
% f: g7 P5 l+ X8 |sistent with true precocious puberty since his testi-0 q( m9 G) G1 T3 g- O( C% k
cles were prepubertal in size. However, testotoxicosis
; u0 |' A% \6 a7 `was in the differential diagnosis because his father2 [ e7 Z, m2 N! e& K
started puberty somewhat early, and occasionally,, B+ x$ V3 X: K$ |* W1 E" t
testicular enlargement is not that evident in the
( t+ r, e$ g! M8 u* X: B0 \! nbeginning of this process.1 In the absence of a neg-* Q0 ^+ z: Q# Q" m% _& T' y' @. i( F- \) _
ative initial history of androgen exposure, our
+ `6 v( Y* s# @5 X! ~biggest concern was virilizing adrenal hyperplasia,' \0 y2 x2 @- v6 J. _' m% s" ~
either 21-hydroxylase deficiency or 11-β hydroxylase
! o1 l3 e6 t. \- M# C& zdeficiency. Those diagnoses were excluded by find-
4 A! ^& X$ }6 p1 A- ~" \; z; cing the normal level of adrenal steroids.
$ r. S. ~7 t8 e# g' t& HThe diagnosis of exogenous androgens was strongly
- `% D. [7 c! |) bsuspected in a follow-up visit after 4 months because
5 L: A9 @8 Z0 Q6 C6 |) I1 othe physical examination revealed the complete disap-
! C/ S% u [5 m. }# ?$ i/ }2 npearance of pubic hair, normal growth velocity, and; l5 c0 A5 |9 \ u# i/ E" p6 c
decreased erections. The father admitted using a testos-' X& K) M: {9 `) V
terone gel, which he concealed at first visit. He was
; t5 D4 y0 |5 t: p% Y; |! [/ ]using it rather frequently, twice a day. The Physicians’9 g+ d% T. a) r% a4 p
Desk Reference, or package insert of this product, gel or1 j- R& j( p3 D# O3 w" R
cream, cautions about dermal testosterone transfer to
/ H, M+ w+ _* } ^; Funprotected females through direct skin exposure.
2 p; L0 M9 i" t+ J- M% USerum testosterone level was found to be 2 times the
U, }2 G7 b% a- _ o1 p% U; ~baseline value in those females who were exposed to
5 `1 L* v' k/ H" g9 Meven 15 minutes of direct skin contact with their male; |8 w: a% s4 g7 |2 ]5 D: y: h
partners.6 However, when a shirt covered the applica-- N, N5 ^# V! n5 w- x
tion site, this testosterone transfer was prevented.* q# L* W/ d8 A* t8 @' { ?
Our patient’s testosterone level was 60 ng/mL,
2 f; H6 Z) t4 k0 E/ L, r% Y2 zwhich was clearly high. Some studies suggest that7 ^) i1 g3 s6 I$ H0 o
dermal conversion of testosterone to dihydrotestos-
, e4 @$ n( y4 o* [terone, which is a more potent metabolite, is more
" \' V3 z" |% O$ z2 y( Xactive in young children exposed to testosterone. z/ \0 D- l% s. ?
exogenously7; however, we did not measure a dihy-7 f" h* K" z; {0 J3 f
drotestosterone level in our patient. In addition to
$ Z7 ~7 ]; w$ u3 D% Evirilization, exposure to exogenous testosterone in
: |0 I3 N1 G0 Xchildren results in an increase in growth velocity and% a% i' Q) E+ @
advanced bone age, as seen in our patient.
4 ~' }( o5 x z5 a2 ?The long-term effect of androgen exposure during
1 R0 X/ G; |) V) u6 {, learly childhood on pubertal development and final7 L: `% Y9 }1 c. ?% e0 M2 X
adult height are not fully known and always remain
q4 {. H1 l& L9 Ia concern. Children treated with short-term testos-8 Z2 ^- p" g8 S; x; W2 J) a
terone injection or topical androgen may exhibit some
) U& I" C5 e% wacceleration of the skeletal maturation; however, after
j, K2 b8 H, _" f+ d3 G/ `5 H* d! fcessation of treatment, the rate of bone maturation- a0 K3 J# ]+ ?; s7 R( ?% d/ D. q
decelerates and gradually returns to normal.8,9
$ z0 I, ~/ I: `6 ]There are conflicting reports and controversy
3 g! r# c# w5 Z+ A! A" F" qover the effect of early androgen exposure on adult
4 p* [8 J. ?+ q4 n. G/ J! e. P: Jpenile length.10,11 Some reports suggest subnormal+ x; M! ]9 W N% o
adult penile length, apparently because of downreg-" q8 ]* f4 Y3 k
ulation of androgen receptor number.10,12 However,2 J. S1 w" B6 k- l' O
Sutherland et al13 did not find a correlation between
+ V) k! ?; }/ z! D3 jchildhood testosterone exposure and reduced adult* d& l' f3 x; o; A9 l3 X! I3 u0 F
penile length in clinical studies.; B1 Q# v9 j: [6 G! G/ h
Nonetheless, we do not believe our patient is
; B5 F; F4 ^. s" kgoing to experience any of the untoward effects from% j6 P- n8 V' ?; T$ P) J" z
testosterone exposure as mentioned earlier because8 O- m% W8 Y% L, V0 U2 ]
the exposure was not for a prolonged period of time.% m5 o! M3 ]8 ?8 n( g& x
Although the bone age was advanced at the time of
! a( l- |# M% [; Ldiagnosis, the child had a normal growth velocity at& j: o" `: |2 I7 ^
the follow-up visit. It is hoped that his final adult+ [0 ~6 Y% W" S# X
height will not be affected.
2 O" q+ B) @# ~3 h, XAlthough rarely reported, the widespread avail-
' Q0 f2 C) E0 A* \ @ability of androgen products in our society may- v! `' l5 h1 L/ S7 p7 n! E! D+ G
indeed cause more virilization in male or female
. B# n6 l) n4 a [6 H4 |' }* vchildren than one would realize. Exposure to andro-* V. V: g7 _* F2 H& r- M+ @
gen products must be considered and specific ques-
! R/ V8 H# s/ t* v; h H3 @3 }tioning about the use of a testosterone product or
' W1 e; O! y! q" U* qgel should be asked of the family members during) t! Y0 o, `$ Y2 d; R& \. m! x
the evaluation of any children who present with vir-
: O. u3 {. |$ g" g% P9 S0 [ilization or peripheral precocious puberty. The diag-- v$ q3 r3 v' H. [9 W `1 w) Z) s
nosis can be established by just a few tests and by4 ~& p. L; F$ P( W7 Y8 L( v
appropriate history. The inability to obtain such a
1 \- K; o* M8 w) t' m9 xhistory, or failure to ask the specific questions, may& o5 N6 g& Y/ a, G- I
result in extensive, unnecessary, and expensive+ T( a; ~% @4 c& I8 `7 P8 K
investigation. The primary care physician should be
5 H6 Q0 P$ N: A, x8 Yaware of this fact, because most of these children
+ E1 |% p5 S2 V- Smay initially present in their practice. The Physicians’
- L* H* |) n9 Z: J# ^+ HDesk Reference and package insert should also put a
, R9 g" P& \, t* M# Q0 Kwarning about the virilizing effect on a male or( p5 t# h; |2 h( ^8 \
female child who might come in contact with some-
9 M; e8 u+ N, G; H; xone using any of these products.
! C0 F. O% ]8 m2 t! l/ a! `+ {- L- sReferences( i2 N# O+ U+ l9 z
1. Styne DM. The testes: disorder of sexual differentiation
1 S$ k: C- G7 }* f4 b* _) Jand puberty in the male. In: Sperling MA, ed. Pediatric. V Z" x6 e: ^
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;& J+ n/ H& T0 I$ D) p8 y) c
2002: 565-628.% X2 z* G7 x: s6 \0 d
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
7 \0 I- V% M. ^# h( R( t: @puberty in children with tumours of the suprasellar pineal
- u% K- V1 P9 W! q/ k4 _3 D) V" w: nat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 y. P0 C- A) T- X( g3 KTopical Testosterone Exposure / Bhowmick et al 543 e$ ? x A; ]- t; h4 B
areas: organic central precocious puberty. Acta Paediatr.! B8 k* n+ @# A" B0 G* y0 Y
2001;90:751-756.
3 @) Q+ y0 X1 I! Z3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed. h& u2 F. \( N" a
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
2 }7 ?3 U* ~# q) C) N8 h9 S* u& o% uDekker Inc; 2003:211-238.
h( T6 v- j% J' r5 l8 v4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual* k# L& O# Y3 p6 j5 P9 V( x* G' ^( Z
development in a two-year-old boy induced by topical* y% N4 D7 z& w& `# B" _( {) k
exposure to testosterone. Pediatrics. 1999;104:e23./ p/ w. R" X' { w
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
3 O z! u' R) X; i- q) u5 HSkeletal Development of the Hand and Wrist. 2nd ed.. O/ L- u( W/ X5 g; G' x. E
Stanford, CA: Stanford University Press; 1959.
. p' v9 A" @( y! p7 f6. Physicians’ Desk Reference. Androgel 1% testosterone,
' Z/ L+ s: J$ J* B4 K" G& k5 \! sUnimed Pharmaceutical Inc. Montvale, NJ: Medical& U; G* L! R) q: s; l
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