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is a significant concern for physicians. Central$ l3 ~( X1 y- i: `' W
precocious puberty (CPP), which is mediated
" a0 b2 @( R! s' s- d/ ?through the hypothalamic pituitary gonadal axis, has' |. @3 V8 k1 z+ U+ Y ^
a higher incidence of organic central nervous system
5 a5 f, ~5 l6 g% _lesions in boys.1,2 Virilization in boys, as manifested% s/ d4 `* H# l& b9 w0 n8 h$ C
by enlargement of the penis, development of pubic
8 V: f$ `6 Y& v+ o: g% ]8 p$ ^" e* d: |hair, and facial acne without enlargement of testi-
& k" N: f5 [- w7 A3 I- N2 i( acles, suggests peripheral or pseudopuberty.1-3 We
$ H! y% Z# C. j( M0 @+ q- N1 sreport a 16-month-old boy who presented with the
2 w) N3 L9 h7 Y8 e( r+ j: g+ Z& oenlargement of the phallus and pubic hair develop-
0 B6 O6 `; z1 p9 G- l- @/ Jment without testicular enlargement, which was due
) ]# x/ h) W* T0 ]' C# `to the unintentional exposure to androgen gel used by
. a2 |1 S/ c8 Vthe father. The family initially concealed this infor-
) W% U# z `$ `2 c" X! R8 V Imation, resulting in an extensive work-up for this4 m0 }1 k! a# F; ]
child. Given the widespread and easy availability of7 w% S1 Q9 X2 ` i/ E
testosterone gel and cream, we believe this is proba-
" K, F" ^5 v$ u8 T5 w7 \$ b3 `bly more common than the rare case report in the
2 P' Z! H2 N9 g6 M- }; d8 q0 t* b1 Vliterature.4
" a# U! w+ `, g0 H% w# X, QPatient Report
% X8 k$ w4 v$ T" jA 16-month-old white child was referred to the% B) v6 G. {! O& d
endocrine clinic by his pediatrician with the concern0 A7 p' y% r/ V) S9 z1 f8 v$ \
of early sexual development. His mother noticed: N p z; Z# J: u0 Q7 S5 ~
light colored pubic hair development when he was1 t' K+ X% M# S' v. e+ ^
From the 1Division of Pediatric Endocrinology, 2University of2 a* A6 D& V; P* L! R
South Alabama Medical Center, Mobile, Alabama.$ G. b! ]. v& T
Address correspondence to: Samar K. Bhowmick, MD, FACE,
! }- ^, Z4 k# s1 p; r4 `Professor of Pediatrics, University of South Alabama, College of8 [, i4 a S- J% v# U
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;5 l, o/ K ?5 r0 _
e-mail: [email protected].
3 d- R. D4 \0 \1 y- aabout 6 to 7 months old, which progressively became" W- t& [, u1 @# `6 y
darker. She was also concerned about the enlarge-# r- {3 p) I7 E/ L9 n: Z
ment of his penis and frequent erections. The child
+ @3 [ f4 z5 O! awas the product of a full-term normal delivery, with: I$ l0 D( Y4 k, a
a birth weight of 7 lb 14 oz, and birth length of
- q: j* q4 z" ~' S1 m% h2 F/ H20 inches. He was breast-fed throughout the first year8 S2 h- I9 O8 ?# j
of life and was still receiving breast milk along with
% {! }8 \5 E$ Vsolid food. He had no hospitalizations or surgery,: Z) s9 m7 I& i$ v; M/ _' W
and his psychosocial and psychomotor development4 k2 Q2 ~8 ~" x3 y
was age appropriate.
* m" L! E3 `& kThe family history was remarkable for the father,+ H+ _& F2 y! k( a1 y. c3 i! M3 U5 u
who was diagnosed with hypothyroidism at age 16,: Z6 d) E# f& ~5 h5 ]
which was treated with thyroxine. The father’s
) n2 k( I Y$ g( W+ L! F [3 u; \height was 6 feet, and he went through a somewhat
% P/ B/ n( c4 ?5 l# I, b/ Dearly puberty and had stopped growing by age 14.
z2 {1 Q6 f2 o/ X. ?$ F f! SThe father denied taking any other medication. The
/ `9 [( o E. V4 `1 D0 G5 \child’s mother was in good health. Her menarche
$ K9 s* `7 a- g8 G2 u% G) L) H5 a4 Jwas at 11 years of age, and her height was at 5 feet
- v4 f4 B' Z# A6 p/ {9 x5 inches. There was no other family history of pre-
# ]$ \6 F. s9 a& S/ Icocious sexual development in the first-degree rela-$ z" P! ?# a% @# f$ w, V4 v
tives. There were no siblings.3 t% _& Q1 w+ e G6 B% w. V
Physical Examination
6 M' X7 Z6 P4 N. [0 R V5 kThe physical examination revealed a very active,
3 L6 v8 N t+ g* oplayful, and healthy boy. The vital signs documented4 ^/ ^9 I! I+ |
a blood pressure of 85/50 mm Hg, his length was# m' G' [) I3 ~; r
90 cm (>97th percentile), and his weight was 14.4 kg
2 B* `7 ~7 T u, Z1 n9 A: R1 p, i(also >97th percentile). The observed yearly growth
- T7 q5 g; q% W( ^# L# Avelocity was 30 cm (12 inches). The examination of3 O# u- U# c. U5 s, ^# H, O
the neck revealed no thyroid enlargement.& [# m! [. | D" j: Z* i
The genitourinary examination was remarkable for
8 Z, c3 h7 `1 R# e- n% lenlargement of the penis, with a stretched length of
1 j: G5 O" v: U5 O4 X8 cm and a width of 2 cm. The glans penis was very well
/ A: u! w1 u; H+ h+ edeveloped. The pubic hair was Tanner II, mostly around
* N* X2 e* ?' {/ X# W1 H2 V4 r; G540% g& e4 c# C, b/ ? d
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
# M$ y1 ~* e4 _the base of the phallus and was dark and curled. The) X) z8 `0 ?0 `. ~
testicular volume was prepubertal at 2 mL each. r: \6 }3 A. P) i! F6 N/ F
The skin was moist and smooth and somewhat% k _3 h7 y- ]! D
oily. No axillary hair was noted. There were no
9 W6 r' o/ m; {+ O4 ?" T; }$ jabnormal skin pigmentations or café-au-lait spots.
5 g: i# c& z& A6 wNeurologic evaluation showed deep tendon reflex 2+& g4 ], b9 b( E
bilateral and symmetrical. There was no suggestion
5 c8 N' \3 P2 b0 k9 i( [; k) l: @of papilledema.8 S0 q a4 G& s! p$ q( [( Q
Laboratory Evaluation
2 Y" W6 e/ Y; A8 s% LThe bone age was consistent with 28 months by
$ J: g2 W9 I) Q, K) Pusing the standard of Greulich and Pyle at a chrono-
6 Y$ a0 Z9 R( k# F [$ Flogic age of 16 months (advanced).5 Chromosomal& @* N# a" K5 A+ G- n1 o1 v) [
karyotype was 46XY. The thyroid function test0 e' {7 i' d8 W
showed a free T4 of 1.69 ng/dL, and thyroid stimu-5 d5 M! V8 G; W) ]
lating hormone level was 1.3 µIU/mL (both normal).
, E% e% D) K6 y3 [: t( JThe concentrations of serum electrolytes, blood" c8 |( d/ k7 z, h3 t
urea nitrogen, creatinine, and calcium all were
5 l* i& |+ a2 owithin normal range for his age. The concentration
; U9 A; I6 |/ f' Jof serum 17-hydroxyprogesterone was 16 ng/dL0 n0 v. M: H: i+ q' F( x+ }
(normal, 3 to 90 ng/dL), androstenedione was 208 n9 O& S+ s2 U4 A& c8 H
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
& V* c: `' _% sterone was 38 ng/dL (normal, 50 to 760 ng/dL),
1 q, h) r+ t( D% l \- xdesoxycorticosterone was 4.3 ng/dL (normal, 7 to3 M) n% _' K9 h4 F! e, C
49ng/dL), 11-desoxycortisol (specific compound S)0 ~7 t5 m- i, h9 s6 Q u
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-) X; A# J5 A3 t2 s/ T. N% J
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total8 E0 F5 T, L+ R: t; k
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),( t+ ]' v# h; ]: p# V& r; E5 K8 L9 I
and β-human chorionic gonadotropin was less than( R+ `5 L L' _. x$ g7 k d0 S
5 mIU/mL (normal <5 mIU/mL). Serum follicular
% y9 n. Q/ X6 `0 s" W* F+ Hstimulating hormone and leuteinizing hormone
* ^ ?" `2 P7 j: Q- u$ h, dconcentrations were less than 0.05 mIU/mL, K) F( n g" P0 d8 }* Y. F$ D
(prepubertal).* c( W) x/ t7 [8 n$ I
The parents were notified about the laboratory) R& O) q* @ b8 N( Q% v- ]
results and were informed that all of the tests were
: I- l) |0 D& q; J1 X; s+ snormal except the testosterone level was high. The! D6 h% s) O/ `) P0 U6 f
follow-up visit was arranged within a few weeks to6 k o1 p! x( v- P' \: R, X/ a
obtain testicular and abdominal sonograms; how-
3 h: N' A3 O- D. b6 K, H6 hever, the family did not return for 4 months.
# x1 j0 s2 G- v0 U5 @Physical examination at this time revealed that the
# b) ?# V8 Y1 F0 a6 D5 Tchild had grown 2.5 cm in 4 months and had gained! g" b8 Z. Q( r( s* S* J, |
2 kg of weight. Physical examination remained! t5 i' L/ U+ y, t" E
unchanged. Surprisingly, the pubic hair almost com-" t# p, }1 o( i- f
pletely disappeared except for a few vellous hairs at
5 Y6 M4 ?$ v' ?7 p+ V- ^; gthe base of the phallus. Testicular volume was still 2. [! y Z! ?8 U% |: j4 ~7 ^5 w
mL, and the size of the penis remained unchanged.5 w" E4 e) x/ G/ d$ F3 t
The mother also said that the boy was no longer hav-
8 q F( H# ]# p* h! N( cing frequent erections.
9 u* `4 I# S+ @1 N; bBoth parents were again questioned about use of9 |1 y% L! I) o b
any ointment/creams that they may have applied to( t5 [7 n' h7 d( @7 `# C7 [1 G% C
the child’s skin. This time the father admitted the% s7 K' C+ [9 |- h& U8 g
Topical Testosterone Exposure / Bhowmick et al 541' b( M$ a) P" Q# [
use of testosterone gel twice daily that he was apply-6 [; y/ K7 u! j
ing over his own shoulders, chest, and back area for
( B3 c% Z) f' ^# X5 e- i: ma year. The father also revealed he was embarrassed# B5 w( _$ B; |8 c* L
to disclose that he was using a testosterone gel pre-- j, B: { i3 G! S+ W4 U
scribed by his family physician for decreased libido
* ]" z; }+ k4 z2 jsecondary to depression." ?# S8 c0 e2 W" w6 L3 s5 w
The child slept in the same bed with parents.
0 S6 e8 x1 H; t. X" [The father would hug the baby and hold him on his2 m# {& `5 V x& f
chest for a considerable period of time, causing sig-' c' k4 u$ C' ]" E* u4 N# o
nificant bare skin contact between baby and father. B: Y( g6 o( R, N. P+ ~. J1 t( ?
The father also admitted that after the phone call,
5 R6 e+ u. [9 p& q2 \when he learned the testosterone level in the baby
Y/ V' U% d2 S' b% U( j4 Z; l1 awas high, he then read the product information0 W: d5 h7 y( E: P1 `! y B
packet and concluded that it was most likely the rea-
" G9 M' S& ~2 N Json for the child’s virilization. At that time, they
5 Z6 h. r% i+ O6 W; P* xdecided to put the baby in a separate bed, and the, {0 i) S6 x: o3 T; u' t
father was not hugging him with bare skin and had7 S9 Q: [6 x f9 k8 b0 o3 _
been using protective clothing. A repeat testosterone
( P* p/ A: a1 P! rtest was ordered, but the family did not go to the
" g/ c# I" T' `5 qlaboratory to obtain the test.
* T4 n" q7 n5 b3 R7 ~# H# i# xDiscussion
9 R5 x+ N3 {- H0 k( S1 EPrecocious puberty in boys is defined as secondary
4 p [( \7 Y1 X2 S( vsexual development before 9 years of age.1,4
- y- s& c& j8 J/ q: v6 rPrecocious puberty is termed as central (true) when
0 l5 s: d' J) T2 O+ b# ]) v+ o Fit is caused by the premature activation of hypo-
$ s1 E* S6 p# {3 B- N9 g; Z# z- f& cthalamic pituitary gonadal axis. CPP is more com-! F o" o) _7 s0 U) g! E
mon in girls than in boys.1,3 Most boys with CPP
# _# @" |4 o \: nmay have a central nervous system lesion that is
& g0 y3 |- R N; y" r8 r1 Presponsible for the early activation of the hypothal-4 u' s) T4 p4 j6 J
amic pituitary gonadal axis.1-3 Thus, greater empha-, Q4 Q4 p |7 y6 C& N, }! v5 |' o
sis has been given to neuroradiologic imaging in
- R$ ^! P4 }9 N2 ?; Jboys with precocious puberty. In addition to viril-, [. i. _* s4 @( Z* p+ |# n
ization, the clinical hallmark of CPP is the symmet-
% V9 t" p$ _) L5 E% w$ y0 ]rical testicular growth secondary to stimulation by
- j% H3 _. Z% \' ngonadotropins.1,3* B- D) Z& {3 I; W
Gonadotropin-independent peripheral preco-3 d# @3 h: w8 Q! P1 b
cious puberty in boys also results from inappropriate1 `7 A- V2 G I' l# |; n
androgenic stimulation from either endogenous or
, Q, A3 v- N& f$ ]5 Y- `exogenous sources, nonpituitary gonadotropin stim-
0 W4 ~' f5 m4 P: g, J7 q! E" |' Tulation, and rare activating mutations.3 Virilizing
$ L+ x b( u* t$ Dcongenital adrenal hyperplasia producing excessive
* r' h* S1 ^1 V3 E6 Nadrenal androgens is a common cause of precocious" K! `/ T& z: l0 N5 u. g" `
puberty in boys.3,4
# r9 C, s. F! b) q9 P5 CThe most common form of congenital adrenal
6 O% Q2 z! f/ _; Y7 b- w) F: fhyperplasia is the 21-hydroxylase enzyme deficiency.% V& Q: {) Y/ c5 R
The 11-β hydroxylase deficiency may also result in6 }. B" ~. P7 f9 a: H
excessive adrenal androgen production, and rarely,
# M2 m# J4 ~" i7 v1 Q+ h; q4 ^' i; \an adrenal tumor may also cause adrenal androgen$ h2 h3 E; w V! f2 T8 W
excess.1,3
' R( r5 [6 x8 J0 m) e1 zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from9 h9 O$ E# P* R9 H" q
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007, s3 e. K. s" x0 E8 B9 k# h
A unique entity of male-limited gonadotropin-
4 {) i3 v) }$ q( nindependent precocious puberty, which is also known+ A0 `, W( X: k
as testotoxicosis, may cause precocious puberty at a+ l4 f* E6 c, `+ {
very young age. The physical findings in these boys! ]% N8 | d- @0 c! O! s. W% |
with this disorder are full pubertal development,
/ ?! C, e& [1 w0 q) uincluding bilateral testicular growth, similar to boys7 E' [9 u4 n4 S
with CPP. The gonadotropin levels in this disorder
0 b* t) B" k* @' e7 y0 j3 G2 T$ U% {8 ~are suppressed to prepubertal levels and do not show
r* N. `% E3 e8 c- o$ [6 rpubertal response of gonadotropin after gonadotropin-, b( F" o! I0 P) ^" z6 Z
releasing hormone stimulation. This is a sex-linked
+ L! K9 M3 l& R$ ?autosomal dominant disorder that affects only3 {$ {: A4 M& v, x' N$ O
males; therefore, other male members of the family: N6 }8 B8 p$ M/ X
may have similar precocious puberty.3
5 D9 S7 s) Q7 l4 y, B: m$ QIn our patient, physical examination was incon-$ H' z6 p) Y- D$ l0 N/ b& M. V
sistent with true precocious puberty since his testi-
" t" ~4 J2 p7 k) {# hcles were prepubertal in size. However, testotoxicosis
`9 s I2 G5 o8 M/ ^( {5 Lwas in the differential diagnosis because his father" Z# t: ^% s* P9 m/ |0 N
started puberty somewhat early, and occasionally,9 S. h" h4 W# r; A
testicular enlargement is not that evident in the
* W, H* ]" W O3 D+ t0 ?$ Nbeginning of this process.1 In the absence of a neg-+ q/ G j- b% j9 w6 f9 M. }& z
ative initial history of androgen exposure, our8 b: l9 m4 @0 V; ?
biggest concern was virilizing adrenal hyperplasia,
' Q: x: a. f" @4 X- E- yeither 21-hydroxylase deficiency or 11-β hydroxylase F- [8 l( w4 e$ J2 f6 y
deficiency. Those diagnoses were excluded by find-$ e( G, }4 P2 l0 a$ _% D
ing the normal level of adrenal steroids.# Z7 |% E; h; I8 ^) q5 Y/ C# C
The diagnosis of exogenous androgens was strongly
) o* A0 |# Q, N) Y; }/ |suspected in a follow-up visit after 4 months because
, V$ n9 ^) t& [" Fthe physical examination revealed the complete disap-: S7 E# _! j m8 [% R7 h
pearance of pubic hair, normal growth velocity, and
( g- N5 n9 N0 [5 V4 hdecreased erections. The father admitted using a testos-
' ^+ a. \* z5 Z# @- e" ~3 i; X2 S' Xterone gel, which he concealed at first visit. He was
2 U o( g" w3 ^using it rather frequently, twice a day. The Physicians’6 ~ C' [" I5 I
Desk Reference, or package insert of this product, gel or8 q& l/ `3 t1 ~9 Q
cream, cautions about dermal testosterone transfer to# Q, F* w/ O3 ?8 U" [: h1 V! l
unprotected females through direct skin exposure. p) F6 E+ P) a+ Z. U% I% b9 r
Serum testosterone level was found to be 2 times the
& @! u2 r, _* K% g5 C' ?. C: V4 \7 ubaseline value in those females who were exposed to Z2 b4 k8 I {; J6 Z
even 15 minutes of direct skin contact with their male
" T$ D' e, B+ E U! H' B; Dpartners.6 However, when a shirt covered the applica-
Y& C8 c( \, ?' `5 }tion site, this testosterone transfer was prevented., F: ]6 h, b$ a+ ~. V* N1 U0 {
Our patient’s testosterone level was 60 ng/mL,, [8 h0 A, r0 C- E& {
which was clearly high. Some studies suggest that: x( `, r, T: `' ]0 `
dermal conversion of testosterone to dihydrotestos-" r" T) c+ d. o9 f% u7 S+ _
terone, which is a more potent metabolite, is more# S* Q: o) w5 E9 `6 |1 b
active in young children exposed to testosterone# G8 u+ t* Z1 x* u
exogenously7; however, we did not measure a dihy-
5 K1 s/ y' Q9 h& \drotestosterone level in our patient. In addition to
: J! X6 ]# O% L) R4 S8 O ?virilization, exposure to exogenous testosterone in$ Z' k1 L. c5 i' P# C' t
children results in an increase in growth velocity and/ L! p' o4 E2 g* ^6 ^$ i* s, E5 m
advanced bone age, as seen in our patient.4 C4 p5 W. r$ Y# B! w$ F1 N
The long-term effect of androgen exposure during
% ?7 a2 V2 u% m; y$ I0 `7 i1 D: ?early childhood on pubertal development and final
1 {# H# R" \6 o* F+ q* dadult height are not fully known and always remain
% s- Z! X! R' E2 ya concern. Children treated with short-term testos-
/ S z- Z: \- V, w$ eterone injection or topical androgen may exhibit some, @. f* x% X; i+ h
acceleration of the skeletal maturation; however, after. q8 u+ d0 v2 T0 _0 M: j
cessation of treatment, the rate of bone maturation
) C2 ^4 H! O& R$ a3 e+ U* odecelerates and gradually returns to normal.8,9, r( v8 @( n5 \$ Z8 R- \8 z& r
There are conflicting reports and controversy
9 }, z. Q& c. t* e, ]over the effect of early androgen exposure on adult
+ [+ b6 h5 y2 J9 Y8 i! Hpenile length.10,11 Some reports suggest subnormal
& `- F6 {2 J4 Iadult penile length, apparently because of downreg-+ f/ r1 D3 v8 [. j6 ?+ x: n
ulation of androgen receptor number.10,12 However,
4 s7 l9 d1 \! D8 e$ ISutherland et al13 did not find a correlation between! V1 R5 y# V# @+ Q3 k8 h t- y
childhood testosterone exposure and reduced adult4 Z& z6 J5 D& F; ?) y# W0 F
penile length in clinical studies.& F; P* T! u( }$ h' k
Nonetheless, we do not believe our patient is
$ E& B/ ]! ]) P" p7 |9 H4 Egoing to experience any of the untoward effects from- N# @ C( {: y
testosterone exposure as mentioned earlier because4 b+ Q8 F5 o! q9 d9 L
the exposure was not for a prolonged period of time.2 ^. Q$ V! B. F0 [' X
Although the bone age was advanced at the time of' X6 m s; O8 R" [% \7 p! v
diagnosis, the child had a normal growth velocity at
! l3 H, E( ~' zthe follow-up visit. It is hoped that his final adult
8 ?( J" r# p. o* g8 r; i9 x& theight will not be affected.5 o' f( j1 g" H9 p, R! H
Although rarely reported, the widespread avail-
: k' B0 v, y9 g& \ability of androgen products in our society may, k" T; g M' A2 a& g
indeed cause more virilization in male or female
7 ]/ h' R1 y4 i2 Q/ Ychildren than one would realize. Exposure to andro-
* {$ `- o6 p" X* a$ wgen products must be considered and specific ques-
/ [# v; @9 L! Etioning about the use of a testosterone product or1 O( \2 T$ B: {+ Z' J8 U4 Z0 q
gel should be asked of the family members during+ ^- i) n/ X. @+ k+ }' M
the evaluation of any children who present with vir-
/ V7 u" h4 D; V$ M6 {ilization or peripheral precocious puberty. The diag-
- ~( _- W+ J: N+ l. xnosis can be established by just a few tests and by; O7 X2 X b9 K5 [. m* M" L! v" z" L
appropriate history. The inability to obtain such a
1 l. c4 g% p. m. m3 Ihistory, or failure to ask the specific questions, may
t& ]+ S3 o0 e w9 ?result in extensive, unnecessary, and expensive9 E4 m4 o: Z4 V [* @
investigation. The primary care physician should be! ]7 E8 ]( L( R. h& t
aware of this fact, because most of these children
& i# e3 t. L$ Y9 N H6 I) emay initially present in their practice. The Physicians’
0 r3 `2 j; G; O: d( D& nDesk Reference and package insert should also put a: `+ T1 L7 H/ c# r1 Q
warning about the virilizing effect on a male or
) k- k9 N" h m m; b R Dfemale child who might come in contact with some-6 J5 B! ]1 N$ f
one using any of these products.- s& X8 p1 [5 f, A y0 p, K* F) q
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x: b$ ?0 c. C7 z0 d* a6 l2002: 565-628.
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puberty in children with tumours of the suprasellar pineal0 v8 f3 _: q7 V, w
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areas: organic central precocious puberty. Acta Paediatr.% W2 N0 g0 j" b; P+ Y
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3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
* O) t: r. k# z3 \* ], w6 dPediatric Endocrinology. 4th ed. New York, NY: Marcel
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! Z2 {' Q; Y& ?$ s0 U. h5 R4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
8 \: q2 \" h0 y8 {development in a two-year-old boy induced by topical
, z- h$ ]2 {% w; k# Mexposure to testosterone. Pediatrics. 1999;104:e23.
e1 ?; C8 u/ r% q, K1 i5. Greulich WW, Pyle SI, eds. Radiographic Atlas of9 Q9 b" }2 s4 d& P ^8 J2 k4 u" G
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3 l0 F) c6 e. aStanford, CA: Stanford University Press; 1959.
# _! G) B9 C( x8 T, C- Z6 [1 f6. Physicians’ Desk Reference. Androgel 1% testosterone,9 F+ D, S. w0 n4 N- a
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