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is a significant concern for physicians. Central
6 O g2 E" o; Q$ P# ~1 U+ Yprecocious puberty (CPP), which is mediated
; l8 M" F# O; S, o9 O! j9 vthrough the hypothalamic pituitary gonadal axis, has U- F6 G2 V. t+ @
a higher incidence of organic central nervous system
; d) i1 \7 b4 K2 N4 `# O3 Wlesions in boys.1,2 Virilization in boys, as manifested
! D' k8 m, C+ v, L2 W4 S, \, [by enlargement of the penis, development of pubic9 T, P$ r, q$ r& I: Z8 x
hair, and facial acne without enlargement of testi-+ X. [6 h* \, T7 ~& B* T
cles, suggests peripheral or pseudopuberty.1-3 We5 [/ J, p' `: O% V7 x& s+ P/ q8 o
report a 16-month-old boy who presented with the
+ z7 V% P% S7 [9 {2 Renlargement of the phallus and pubic hair develop-
( O( x% `) J) F' nment without testicular enlargement, which was due
6 z; K$ g0 M$ y3 w6 z" ]to the unintentional exposure to androgen gel used by
. w }$ |& X) [& n" i$ lthe father. The family initially concealed this infor-3 w- ~( X: R! S- ?! U
mation, resulting in an extensive work-up for this2 E8 h+ j! B5 k
child. Given the widespread and easy availability of. @3 i) C" B I" w Y1 p/ X, o' R# X
testosterone gel and cream, we believe this is proba-9 O+ U |% a+ R, Z: Y7 R
bly more common than the rare case report in the
7 G' K2 x& p" R% ?literature.4
% h+ v+ j3 C9 u" p) R2 cPatient Report
2 k8 ^7 t" B7 W4 s, QA 16-month-old white child was referred to the: K6 q- Z7 S- [0 c. |
endocrine clinic by his pediatrician with the concern. o6 }& t- D& W- D2 G
of early sexual development. His mother noticed6 i% h; k2 T3 ]. ^$ |
light colored pubic hair development when he was
0 M7 b; z- z5 i1 YFrom the 1Division of Pediatric Endocrinology, 2University of! z0 A9 A# D! _- g- [% w' a
South Alabama Medical Center, Mobile, Alabama.
5 J# \! D, H+ `$ }Address correspondence to: Samar K. Bhowmick, MD, FACE,
5 q B" ]) E @( L# MProfessor of Pediatrics, University of South Alabama, College of
! Y `8 V- x0 f: _ SMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;- h8 s# O: g9 Z$ H
e-mail: [email protected].
9 h7 r8 u& t& w% U1 Kabout 6 to 7 months old, which progressively became! \! a1 t3 Y e2 {1 A# L
darker. She was also concerned about the enlarge-
# X F2 }" Q3 yment of his penis and frequent erections. The child( b& B- N- }; ]; J7 }5 M6 p& o
was the product of a full-term normal delivery, with0 a' S; w, T. y) d! |
a birth weight of 7 lb 14 oz, and birth length of
5 R9 v ~( p% C) K7 ?, Q' ~5 o20 inches. He was breast-fed throughout the first year
) a6 X3 z# T2 D( sof life and was still receiving breast milk along with
9 g( w6 c! i, O, g: A3 L% ] ]: g% osolid food. He had no hospitalizations or surgery,
0 \! o1 P5 l6 [* q5 A8 _/ V& W+ @and his psychosocial and psychomotor development0 ^. C/ _* B; e4 D- A0 c/ c
was age appropriate.
* T( y; Y! A0 T0 g j- b, ]The family history was remarkable for the father,
: L, R$ N9 @; R" ?! f; {who was diagnosed with hypothyroidism at age 16,
9 p. O6 k1 }' ^$ A1 {+ v9 dwhich was treated with thyroxine. The father’s: e8 y+ u. O# i2 C) M" F& K9 @
height was 6 feet, and he went through a somewhat
4 i5 [0 C$ N+ s& `- H' U1 A( T" bearly puberty and had stopped growing by age 14.$ M: W) c, l# B
The father denied taking any other medication. The6 `* J% i3 c1 e. ]
child’s mother was in good health. Her menarche; i( b; W; N# p5 J, a
was at 11 years of age, and her height was at 5 feet
, ~$ | T$ D3 A1 s3 N$ d5 inches. There was no other family history of pre-
8 ~3 O+ q. i5 ?& A+ S" Bcocious sexual development in the first-degree rela-
& _$ W! h- S) V. _) S8 |9 Atives. There were no siblings.
) |2 w- v: `7 A7 s( N% ~2 fPhysical Examination t/ h7 r8 Y( ^6 G; `, ^- b" x
The physical examination revealed a very active,
u: Y- t; |4 m& h3 ?" V9 o" }playful, and healthy boy. The vital signs documented
/ @. ^! c7 H) S; x: aa blood pressure of 85/50 mm Hg, his length was& }5 T* g0 v" e& M
90 cm (>97th percentile), and his weight was 14.4 kg7 U7 Z2 E. y* o; M- @. S. d
(also >97th percentile). The observed yearly growth
/ h$ x1 _8 N/ K! r# d; B. ~velocity was 30 cm (12 inches). The examination of
0 G" z# T# I, w0 M& tthe neck revealed no thyroid enlargement.
/ F, }! y' X4 z7 B% R6 bThe genitourinary examination was remarkable for4 O! G3 m2 W7 D5 j% T5 i
enlargement of the penis, with a stretched length of" U2 Q; g* u' y
8 cm and a width of 2 cm. The glans penis was very well" \& p' r) E/ \7 m. ?) V/ p: c
developed. The pubic hair was Tanner II, mostly around
8 o2 I% @# [, ^" l$ m' p540
: m8 ~3 r* ~1 S( `6 tat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! R2 X7 T5 g. f" y; }: z/ wthe base of the phallus and was dark and curled. The
/ T/ S/ {& I: V4 u0 ^testicular volume was prepubertal at 2 mL each.! T! X' x+ ]6 C2 G5 |2 I
The skin was moist and smooth and somewhat, c* ^- m/ @# P& ~- j
oily. No axillary hair was noted. There were no. f, X) v/ C. c, E# @
abnormal skin pigmentations or café-au-lait spots.$ q" [$ |' L8 P" N& ~
Neurologic evaluation showed deep tendon reflex 2+# r& S: O, Q0 J* G. _$ x* D
bilateral and symmetrical. There was no suggestion. K" _; D0 i, D3 K
of papilledema.5 f4 J: g- c( _; S. F
Laboratory Evaluation
, L& v/ R; Z0 E* G8 d) J+ a3 BThe bone age was consistent with 28 months by
9 n5 E) D' E# i4 y1 L% fusing the standard of Greulich and Pyle at a chrono-
( b, T% L/ f9 |6 O: t- ]7 w8 ?8 \logic age of 16 months (advanced).5 Chromosomal* ]0 M' ?- q' X8 b+ j7 F2 K
karyotype was 46XY. The thyroid function test" r1 q8 M2 x9 h) F
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
_# E0 X3 g$ i+ b0 @1 W' ]lating hormone level was 1.3 µIU/mL (both normal).
4 p7 T' Y/ A+ e- |/ ?! bThe concentrations of serum electrolytes, blood
+ y1 Z6 }. U( I" a; Xurea nitrogen, creatinine, and calcium all were
6 A( q$ k- B& nwithin normal range for his age. The concentration& I! V C6 @- [* ^. j/ _
of serum 17-hydroxyprogesterone was 16 ng/dL
) P! P8 W+ B3 `# R z% Y7 n(normal, 3 to 90 ng/dL), androstenedione was 20
# X p* b# B( Wng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
; G7 y( x/ I, q9 Tterone was 38 ng/dL (normal, 50 to 760 ng/dL),3 {' r& Y5 f1 Q7 y Z' @, \8 ~
desoxycorticosterone was 4.3 ng/dL (normal, 7 to3 L: o" L/ c; o
49ng/dL), 11-desoxycortisol (specific compound S)' [: D: w, `! s [3 v" [+ d
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
' I8 P( r4 E% n( ^tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
+ j u: c" T2 U% e, b" m9 Ltestosterone was 60 ng/dL (normal <3 to 10 ng/dL),8 g8 ]" n5 @$ L1 W+ ?# t& p2 Z
and β-human chorionic gonadotropin was less than
, n( J$ Q& E" {( u1 m$ U) N5 mIU/mL (normal <5 mIU/mL). Serum follicular
1 p" T8 C6 ], M8 B0 x- Hstimulating hormone and leuteinizing hormone
. e* f5 @$ `7 q. X' S# m, Tconcentrations were less than 0.05 mIU/mL
$ v) Z: `! g& Z(prepubertal).2 V; B* R$ H0 d" W$ ^, ?3 B2 e8 E' [
The parents were notified about the laboratory8 ~- g5 ~" }- O# C' O' L! V
results and were informed that all of the tests were
% ^' b! L7 k, ~" n; I3 Snormal except the testosterone level was high. The M8 o( G% Y* K, K( P X
follow-up visit was arranged within a few weeks to
9 z% i4 n0 n6 b, u# sobtain testicular and abdominal sonograms; how-
& W0 T& O4 Q! @& C, G! hever, the family did not return for 4 months.
6 [" I* C1 J; e" B, v/ u% R( aPhysical examination at this time revealed that the
% k% M2 R% k' nchild had grown 2.5 cm in 4 months and had gained1 V- H T9 V" [: T0 s; j
2 kg of weight. Physical examination remained( N$ x& L8 f, j- L1 b! k4 H
unchanged. Surprisingly, the pubic hair almost com-
, l9 |( b. u9 F0 K3 b. gpletely disappeared except for a few vellous hairs at, z# z' E" \4 P" Z- n, R' G
the base of the phallus. Testicular volume was still 2
- b% ]. i$ ^4 x' _; _& P" nmL, and the size of the penis remained unchanged.. h/ V- S% X3 l" y
The mother also said that the boy was no longer hav-- I7 X( U( c) `6 }% q; [
ing frequent erections.
: W: i" [4 u- `' i3 lBoth parents were again questioned about use of* U' J# b; ?$ d' J& {( {8 U. b! Y
any ointment/creams that they may have applied to
, l) k2 S+ J4 q% r Bthe child’s skin. This time the father admitted the* R" O2 x8 f3 C! c2 B1 u' }* M" M
Topical Testosterone Exposure / Bhowmick et al 5417 Q$ o4 n# ]+ y) O
use of testosterone gel twice daily that he was apply-
7 Y) R) `8 }( M3 b3 T" Ting over his own shoulders, chest, and back area for. {: Z4 G T9 n+ ]1 V8 u9 Z; z
a year. The father also revealed he was embarrassed, @- g) G* X" p/ `4 y3 L
to disclose that he was using a testosterone gel pre-
( s g, S8 m$ @( i vscribed by his family physician for decreased libido
7 r! s; h; y1 ]; U6 c8 S/ d' Y! [5 tsecondary to depression.! q$ S7 ~$ g7 N
The child slept in the same bed with parents.
" S- i$ a% `+ ^( h/ _6 \The father would hug the baby and hold him on his
2 c7 ]! l, L/ a; i1 a$ _8 z. {- hchest for a considerable period of time, causing sig-
! z- C: d* x+ b) T0 m+ Nnificant bare skin contact between baby and father.
- D% f5 l6 x8 j1 z! y7 B6 T( nThe father also admitted that after the phone call,
1 k) r$ t" C. R6 N9 p- i3 awhen he learned the testosterone level in the baby" U7 d7 w; m, m4 ~$ S; J
was high, he then read the product information
; Q+ d/ j& Y9 i7 y! {3 j* Q* ] Cpacket and concluded that it was most likely the rea-
/ Y1 c' M1 _1 \" B' u5 ason for the child’s virilization. At that time, they7 t% g8 p' X: h$ K; Z6 E- A- g
decided to put the baby in a separate bed, and the4 Z* z: `, W+ r. [% `% \7 d& l
father was not hugging him with bare skin and had3 V& x8 F0 R O7 i
been using protective clothing. A repeat testosterone' p" ]4 P( Z# K( [
test was ordered, but the family did not go to the% X5 |. y$ b3 Z& [" r5 o
laboratory to obtain the test.% `3 H3 Q$ W$ _7 `/ B" @; U) [& h
Discussion9 g$ ?% ]8 g) z9 z: P
Precocious puberty in boys is defined as secondary& p3 h- L5 l' O$ }9 b7 n
sexual development before 9 years of age.1,4 {$ f9 N: E5 C. D' O4 V
Precocious puberty is termed as central (true) when
( O6 e! }2 _" F& n5 p6 qit is caused by the premature activation of hypo-
' m+ U4 ?8 K9 f7 S" Hthalamic pituitary gonadal axis. CPP is more com-) @; l, W2 M7 v$ _8 H( F' G+ @
mon in girls than in boys.1,3 Most boys with CPP
5 e/ F( M% B( M S& G9 j Jmay have a central nervous system lesion that is
: {; B0 b5 n3 a2 Presponsible for the early activation of the hypothal-
) k# [8 k5 Q5 d! V1 Xamic pituitary gonadal axis.1-3 Thus, greater empha-) I3 l! l3 B8 ]! T9 |$ |
sis has been given to neuroradiologic imaging in: ]3 N* i) ^$ W4 b0 s* c
boys with precocious puberty. In addition to viril-
) D" r0 _" k5 n7 f- n- e0 l6 dization, the clinical hallmark of CPP is the symmet-7 g, _ K9 s w9 j
rical testicular growth secondary to stimulation by
- o# J" M& [# W& Q9 e7 c7 Dgonadotropins.1,3
! z" z! G. o0 u% @5 WGonadotropin-independent peripheral preco-* ^( T9 B2 T: n0 v; R
cious puberty in boys also results from inappropriate9 g7 Z! ^ F- ]2 C9 C2 ]" R
androgenic stimulation from either endogenous or
9 w1 t& a, g5 f( ?exogenous sources, nonpituitary gonadotropin stim-
/ W9 m( U- ?4 h7 h: L; y; Aulation, and rare activating mutations.3 Virilizing$ i9 e) M( R3 ^4 E9 o6 i0 j
congenital adrenal hyperplasia producing excessive
( l% R7 z8 T9 U! h3 i/ ?$ a' k& C' h) z, _adrenal androgens is a common cause of precocious
7 ~. H) |0 z2 H* `$ Hpuberty in boys.3,4
* }- C7 _5 v. T2 n- `The most common form of congenital adrenal
) c2 U) i# z* j( _0 t! E! v9 Mhyperplasia is the 21-hydroxylase enzyme deficiency./ m" a0 }, A0 e4 I# z5 C; f
The 11-β hydroxylase deficiency may also result in
! K- {) x c, I/ oexcessive adrenal androgen production, and rarely,
, H+ q1 ^+ c1 H' x$ m9 @an adrenal tumor may also cause adrenal androgen5 R# ?$ Y ] F
excess.1,3
; {9 Y; `" D7 aat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 k; I2 [6 z1 ?+ R1 b- a9 h) B* W542 Clinical Pediatrics / Vol. 46, No. 6, July 20074 V: @* A4 `+ o5 i+ q
A unique entity of male-limited gonadotropin-- {: o1 P9 l L5 F7 [& E% [! t' F
independent precocious puberty, which is also known
$ O0 Q3 y# {+ @4 Oas testotoxicosis, may cause precocious puberty at a/ \7 f4 I* ~- a8 Q
very young age. The physical findings in these boys
0 _% M! P+ `) v6 I" |- qwith this disorder are full pubertal development, j' |( U- R3 d) a6 @) J, E6 K4 [
including bilateral testicular growth, similar to boys
( Z' c8 R7 K) }; t8 n7 a/ i; q& awith CPP. The gonadotropin levels in this disorder ?' K2 D+ \9 _
are suppressed to prepubertal levels and do not show
5 p1 Y* }8 }7 M! `pubertal response of gonadotropin after gonadotropin-# K$ ~1 d7 ~# x+ p% T
releasing hormone stimulation. This is a sex-linked
0 n0 o# v7 s8 o8 z f! f/ ~autosomal dominant disorder that affects only
$ U% D; y" B. A2 Fmales; therefore, other male members of the family
0 b! a3 f! u5 p9 \may have similar precocious puberty.3" s& k! A0 y% i4 ~
In our patient, physical examination was incon-# f6 ` ` ~' F
sistent with true precocious puberty since his testi-
- I% K, k! b9 q gcles were prepubertal in size. However, testotoxicosis& O, K) k: J7 J. k2 L" I
was in the differential diagnosis because his father
, f) A- x L. E4 O$ D- Lstarted puberty somewhat early, and occasionally,' d& c) C- K' S8 C2 |+ P$ |8 f
testicular enlargement is not that evident in the! q8 W. d4 e( E! y$ R% X, t7 N/ D8 t5 M8 U8 l
beginning of this process.1 In the absence of a neg-/ q0 j! J6 \+ b C' y
ative initial history of androgen exposure, our
8 D$ a( v5 a$ T6 |* E2 K+ y/ o @biggest concern was virilizing adrenal hyperplasia,
% G" ~' Z8 Z+ w/ `- xeither 21-hydroxylase deficiency or 11-β hydroxylase9 v- a Q2 |& J1 Y
deficiency. Those diagnoses were excluded by find-
" S6 x3 p1 h4 z% V6 Aing the normal level of adrenal steroids.5 I. E( Z Z9 g. O% J, ]
The diagnosis of exogenous androgens was strongly
9 t( r6 `" g! C5 [9 p+ ~+ f% b/ psuspected in a follow-up visit after 4 months because
/ B. [2 `5 ^* i9 z% Dthe physical examination revealed the complete disap-0 N/ k' n+ e: O; T9 _( [
pearance of pubic hair, normal growth velocity, and
! l) u' f- v' \6 |1 V4 b7 D! tdecreased erections. The father admitted using a testos-
* U( u: H3 p8 \1 {! Y) {" M. L: vterone gel, which he concealed at first visit. He was
3 X8 h% M x% y, W' H4 eusing it rather frequently, twice a day. The Physicians’
4 g" Y" D& V A. d6 jDesk Reference, or package insert of this product, gel or* z$ ], r& T% V! w) [
cream, cautions about dermal testosterone transfer to8 h2 s" w# w8 J% h% p) g
unprotected females through direct skin exposure.
8 E+ N/ X* {& ^2 J& |% ]5 YSerum testosterone level was found to be 2 times the8 E8 H$ t( ~/ s) W8 D3 S9 S5 h% }; {
baseline value in those females who were exposed to
+ [8 G) J2 l0 S- C7 z+ F% oeven 15 minutes of direct skin contact with their male
m/ x2 N* O' spartners.6 However, when a shirt covered the applica-5 N0 Q+ ~, b1 r! ~( y9 R4 l. T% k) r
tion site, this testosterone transfer was prevented.
/ z/ X' b$ ]0 Q E- V$ TOur patient’s testosterone level was 60 ng/mL,
2 V2 d( B1 D6 `# C. D9 Qwhich was clearly high. Some studies suggest that
. P6 G9 x2 W5 y$ y4 ^dermal conversion of testosterone to dihydrotestos-3 R+ q, Z* M- c* r! J3 q( x
terone, which is a more potent metabolite, is more
+ L* P" @6 G6 A, y6 vactive in young children exposed to testosterone( M5 w9 p1 A) D* ]+ Q' d7 f
exogenously7; however, we did not measure a dihy-3 X' F; a& K! Y5 ?% ?
drotestosterone level in our patient. In addition to
4 K; z( F; w) F4 ]% ovirilization, exposure to exogenous testosterone in+ L6 _! h$ q3 v+ J$ [2 w6 f
children results in an increase in growth velocity and
7 L/ P6 b1 N; U9 p4 eadvanced bone age, as seen in our patient.
; \: E! z: X) }# c! mThe long-term effect of androgen exposure during
, s# N1 G! ^. R6 ?" t" q: @early childhood on pubertal development and final+ }3 _+ k# P. l9 z
adult height are not fully known and always remain& ^6 O1 I( L( r
a concern. Children treated with short-term testos-
* Q' S* I( @; r" @, x# L( O. vterone injection or topical androgen may exhibit some) R( |+ r' k) l; I) x
acceleration of the skeletal maturation; however, after( @5 [) i; q2 K# C+ b( b
cessation of treatment, the rate of bone maturation: ~* a" R0 W I( f4 P1 j. Q/ S# @3 c
decelerates and gradually returns to normal.8,9
% U/ c( _7 D8 ~There are conflicting reports and controversy
& T* k& X. V/ W5 O2 {over the effect of early androgen exposure on adult
2 l% J9 C+ Y a5 Mpenile length.10,11 Some reports suggest subnormal
/ _( i- W+ j: l3 S oadult penile length, apparently because of downreg-
) ^/ x* r' M6 O* R- [ulation of androgen receptor number.10,12 However,' A( @' b& P' ~
Sutherland et al13 did not find a correlation between! k& t+ h/ Y" A
childhood testosterone exposure and reduced adult) P1 ]3 W: e, M6 `& G2 J" c a
penile length in clinical studies.7 d8 q5 A3 \! x+ M' T4 C# A4 B
Nonetheless, we do not believe our patient is
3 Y) M- `" v1 J) m# B5 {# Ngoing to experience any of the untoward effects from- Q; e) s/ f, a4 c+ a0 l
testosterone exposure as mentioned earlier because
1 j, d3 g" c4 y9 Z5 dthe exposure was not for a prolonged period of time.; y) c( l: f- U. O/ t" M6 C
Although the bone age was advanced at the time of
9 m0 I" q8 E5 Z1 Rdiagnosis, the child had a normal growth velocity at
" A0 m2 @" M* xthe follow-up visit. It is hoped that his final adult
) t% a0 @1 W$ Yheight will not be affected.
4 f' n; `/ ~9 \ R6 RAlthough rarely reported, the widespread avail-' g4 M% \+ B- s
ability of androgen products in our society may4 }7 V. I* q0 @
indeed cause more virilization in male or female
# o2 K4 H" X1 s5 J) r# ` Z gchildren than one would realize. Exposure to andro-, ~% h! c. h* E4 _% S5 Y' i
gen products must be considered and specific ques-) C: p% P6 }4 n6 i; e
tioning about the use of a testosterone product or
4 }5 z. M* l$ C" Sgel should be asked of the family members during7 \: g- I6 T" t2 c0 ?* g
the evaluation of any children who present with vir-6 [$ q' j8 _1 X0 B! W
ilization or peripheral precocious puberty. The diag-
0 D4 {" e1 x8 [: {$ ynosis can be established by just a few tests and by
8 Q6 d9 O8 K. E- [5 \+ `/ iappropriate history. The inability to obtain such a
8 r7 Y9 q6 P: C7 ^+ v* Nhistory, or failure to ask the specific questions, may: b8 V- C' Q+ S' j
result in extensive, unnecessary, and expensive
' e: b6 P% a6 ]2 z U- l% u2 uinvestigation. The primary care physician should be4 P& U& V! |' `3 V& J9 t4 `
aware of this fact, because most of these children
+ a" R3 ~& c0 y) p- E8 q6 @may initially present in their practice. The Physicians’/ |* Z% v# H! E% }8 p
Desk Reference and package insert should also put a G8 `+ ^ M& a- R) t5 X3 T6 {" u
warning about the virilizing effect on a male or3 P3 G9 l$ \6 v0 m) C: ]
female child who might come in contact with some-3 S* ?$ Z' D; \
one using any of these products.
* ?6 t v4 s& b3 j" X0 F4 t, r2 C8 {& F \References% o( U" {1 l3 V+ d6 ^3 K1 E" z2 @
1. Styne DM. The testes: disorder of sexual differentiation$ q- P7 t% Q: e# q- ?
and puberty in the male. In: Sperling MA, ed. Pediatric
# X1 j% Q1 }3 lEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;2 m) G2 t! O7 X& O
2002: 565-628.0 |8 f; M! S3 {" k9 b# v1 s
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious9 A( @/ A3 r: a$ m v$ z
puberty in children with tumours of the suprasellar pineal
. K/ z' M- D4 u' Q. {$ F( E! nat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from+ k! B3 W5 a6 Z5 n( x1 s
Topical Testosterone Exposure / Bhowmick et al 543
6 {9 Y( ^- q: U# T' L9 mareas: organic central precocious puberty. Acta Paediatr.
9 i9 R0 T+ H" v7 R6 N( n2001;90:751-756.
' k; X1 U1 p$ n1 T; z3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.! h" X4 A7 c% m2 j" o
Pediatric Endocrinology. 4th ed. New York, NY: Marcel! D& }+ \! d) P0 k+ ? A8 m
Dekker Inc; 2003:211-238., M: I' r1 @7 t9 ]
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
) X: N: `' C x4 s( |. j2 E% Xdevelopment in a two-year-old boy induced by topical
" V/ E5 _5 P7 `; j8 u8 nexposure to testosterone. Pediatrics. 1999;104:e23.
9 Y( o1 G& Q% A1 i6 f0 V" Z% i) X5. Greulich WW, Pyle SI, eds. Radiographic Atlas of( s4 L' H9 d1 N+ y2 x' ~1 g
Skeletal Development of the Hand and Wrist. 2nd ed.
# P f( z" f# y* e. U$ c$ }Stanford, CA: Stanford University Press; 1959./ k2 M2 ?( X% m
6. Physicians’ Desk Reference. Androgel 1% testosterone," ~5 z6 J$ F! x) I2 n0 m
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