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is a significant concern for physicians. Central" \9 M' f: \- v' `) B4 e- c
precocious puberty (CPP), which is mediated
0 N; I1 _( G" X, e/ jthrough the hypothalamic pituitary gonadal axis, has
0 S0 N" {7 m$ Q2 c! k% C' ]a higher incidence of organic central nervous system
% G: `. c! ], K0 \0 Wlesions in boys.1,2 Virilization in boys, as manifested
# @. w& F: o0 T+ ^5 u6 i g+ N$ Oby enlargement of the penis, development of pubic
4 ?6 q+ N& W8 n# g1 Hhair, and facial acne without enlargement of testi-
/ k/ ]" x3 ]8 Hcles, suggests peripheral or pseudopuberty.1-3 We/ o0 f8 L1 k4 O8 z; B& M) M/ V
report a 16-month-old boy who presented with the$ W/ X/ m. O, ~! F' ]" A' R
enlargement of the phallus and pubic hair develop-( I) D, U5 o# j% d* |
ment without testicular enlargement, which was due7 C0 e8 \) i2 p$ v4 {( e
to the unintentional exposure to androgen gel used by. w! K. a3 l% ]6 o7 j6 [6 e M
the father. The family initially concealed this infor-
! y j5 ~. t4 Smation, resulting in an extensive work-up for this
. N0 g7 U, k- V, M1 L& v3 nchild. Given the widespread and easy availability of
0 B/ a! s8 p* h6 @4 [testosterone gel and cream, we believe this is proba-
4 e1 @5 \3 k- Tbly more common than the rare case report in the
5 \) R4 G0 o) m/ jliterature.4
2 X7 _% i8 X, x/ I4 U% Y% qPatient Report
) w4 Y* a" s5 A0 i- {A 16-month-old white child was referred to the
& i1 o4 H6 i- i9 n; ]! C6 [endocrine clinic by his pediatrician with the concern" A I0 X* a: k7 j6 f
of early sexual development. His mother noticed$ \; `( ^7 a" O" \$ b
light colored pubic hair development when he was
- }8 c4 T* r( e! n1 tFrom the 1Division of Pediatric Endocrinology, 2University of$ H8 ~ {- P2 ?( X
South Alabama Medical Center, Mobile, Alabama.
/ w6 B- d j* U! k+ w L: _Address correspondence to: Samar K. Bhowmick, MD, FACE,
# K& h8 m i: ?Professor of Pediatrics, University of South Alabama, College of
; |) h$ W4 v7 O! v% N1 jMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;- J- [$ {; r" K0 |# \" e
e-mail: [email protected].4 L9 w f! r Y& l: y
about 6 to 7 months old, which progressively became
4 J4 S$ e7 ^* d1 l# z% cdarker. She was also concerned about the enlarge-. O1 t0 C9 h1 g; r9 t
ment of his penis and frequent erections. The child9 b% z3 V0 _8 b- ]0 W+ o" S7 n
was the product of a full-term normal delivery, with$ j+ x* W' K0 L% ?8 C/ n2 U
a birth weight of 7 lb 14 oz, and birth length of" m: |/ c8 r4 P& h6 Q: U1 ?
20 inches. He was breast-fed throughout the first year
( ~$ V2 t- |6 u/ C- { z7 Xof life and was still receiving breast milk along with
% y E: x1 D) {: }0 W& Ksolid food. He had no hospitalizations or surgery,
2 ?: [$ p0 I' K8 W! f Zand his psychosocial and psychomotor development
+ v* q, c4 a5 s+ p, e) \* Z: Vwas age appropriate.
3 a' Z7 t' a+ _; B0 q( { zThe family history was remarkable for the father,9 G" _/ J. r3 H+ |( B0 H" @: y6 ` F |
who was diagnosed with hypothyroidism at age 16,
7 C6 u/ r& {; b6 I C5 Hwhich was treated with thyroxine. The father’s
v- N' B2 g& c$ j/ O2 C. h* p0 ^height was 6 feet, and he went through a somewhat+ K* Y: o' P" K$ s/ x) k8 m4 u
early puberty and had stopped growing by age 14.
6 C. o5 {* I( ^: U4 W6 c( NThe father denied taking any other medication. The
; l( V+ `! _& xchild’s mother was in good health. Her menarche
# A. W1 a0 u+ _% a0 d; \was at 11 years of age, and her height was at 5 feet3 D: L% [( ?9 G# k
5 inches. There was no other family history of pre-& ]7 N" H& m9 U! |4 n! C+ F* T
cocious sexual development in the first-degree rela-
# w/ v2 g7 I9 l/ j, s( O$ w8 stives. There were no siblings.) a" X& s2 }+ e6 D/ A
Physical Examination! Y! G# l- r& S6 P& V
The physical examination revealed a very active,
3 H& w2 h- \/ ~8 H1 p Xplayful, and healthy boy. The vital signs documented* C& [% @- {8 U
a blood pressure of 85/50 mm Hg, his length was! G0 u" Y5 _- r n8 ^5 }" s
90 cm (>97th percentile), and his weight was 14.4 kg
. @2 A3 [% n3 [2 i6 O, D(also >97th percentile). The observed yearly growth. k& s, l' o' B) w- s* J
velocity was 30 cm (12 inches). The examination of; l$ g. T# [8 p4 F
the neck revealed no thyroid enlargement.
7 J0 v) q+ L" i' {8 [The genitourinary examination was remarkable for( g9 ~- D' s4 O/ ~9 Y/ B
enlargement of the penis, with a stretched length of
; N, ?! {* Z0 U8 cm and a width of 2 cm. The glans penis was very well# F6 V, b; @* N" u6 g, y# F8 h
developed. The pubic hair was Tanner II, mostly around
# L, O9 S% D) Y: U540
, K* s: U) o2 _3 A3 M6 Lat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ E* p0 ^' j R# _2 R/ T0 uthe base of the phallus and was dark and curled. The% `- u% @8 u5 b9 g1 \9 O1 e
testicular volume was prepubertal at 2 mL each.
: K* U( M& @) D# V7 F0 mThe skin was moist and smooth and somewhat& A9 p: `7 \2 Z" @/ R- P6 H- Y/ i
oily. No axillary hair was noted. There were no
% p$ r/ P# o8 ?$ _abnormal skin pigmentations or café-au-lait spots.% ]: T6 A& E, K- f3 N9 L/ m
Neurologic evaluation showed deep tendon reflex 2+1 I3 K1 W$ y: x4 O
bilateral and symmetrical. There was no suggestion% _- z! x) z$ n6 Q1 p
of papilledema." Z5 f8 t; G9 S9 z6 |+ [: x
Laboratory Evaluation& O2 Q) l( W; h+ P
The bone age was consistent with 28 months by) @8 o5 U) x( e2 p
using the standard of Greulich and Pyle at a chrono-% w, z7 c- @; h* a1 Z
logic age of 16 months (advanced).5 Chromosomal
7 Q5 S- h: b( Q2 ^, c9 w% }karyotype was 46XY. The thyroid function test
7 t" n! c) g$ R: y0 }, Zshowed a free T4 of 1.69 ng/dL, and thyroid stimu-4 r" Y* M: A& l+ [+ B7 I, W: f$ Y
lating hormone level was 1.3 µIU/mL (both normal).- {; i/ }$ M- [) d
The concentrations of serum electrolytes, blood* m5 V7 P8 P! ? ]1 G7 N2 [* K
urea nitrogen, creatinine, and calcium all were5 M& }8 @' d: s, K1 y4 Q
within normal range for his age. The concentration
8 y" w5 H* z5 d* G. G" ]0 L6 Xof serum 17-hydroxyprogesterone was 16 ng/dL
4 [' V! m. H# P) H(normal, 3 to 90 ng/dL), androstenedione was 20
, ~( F0 a7 L0 j i# a5 _* kng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
/ I! ], i! K% N$ J4 {terone was 38 ng/dL (normal, 50 to 760 ng/dL),
+ B7 K1 m, z }desoxycorticosterone was 4.3 ng/dL (normal, 7 to
% b* Z. e" r! H, ^, ]6 d49ng/dL), 11-desoxycortisol (specific compound S)/ V+ Z7 z2 c0 ~6 y
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
1 |" o! e* A: S# o# Y; r! e' Qtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total7 B! y7 E: f% z1 j
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
: }- s2 P# \5 a Land β-human chorionic gonadotropin was less than7 o5 G; k5 \4 Z/ i7 O0 J
5 mIU/mL (normal <5 mIU/mL). Serum follicular
6 M$ a9 S' {# ^' K% l& M% W- Ustimulating hormone and leuteinizing hormone
3 G- R) H7 k4 v& J3 Rconcentrations were less than 0.05 mIU/mL% q& K* P8 U+ Q
(prepubertal).
' R3 U: p4 c- G8 GThe parents were notified about the laboratory% G) X) \0 E* I" ]
results and were informed that all of the tests were9 n+ X4 x& w* `! x* f4 O7 A
normal except the testosterone level was high. The! F* b; F2 y) ~0 F4 T3 `
follow-up visit was arranged within a few weeks to6 x, K( u! Z# J" o; k
obtain testicular and abdominal sonograms; how-
* G$ Y/ u0 H1 X/ Aever, the family did not return for 4 months.* Z$ B# D$ ], r
Physical examination at this time revealed that the6 S! b8 A% E0 H
child had grown 2.5 cm in 4 months and had gained
* b6 G, k ~: z) W5 A/ n# k# J. K2 kg of weight. Physical examination remained
$ }( _/ S- f( k R* munchanged. Surprisingly, the pubic hair almost com-# W0 c. O7 u3 p# ^1 s: Z( M! P! ~3 L
pletely disappeared except for a few vellous hairs at0 N3 N& E4 r7 S9 @# G i
the base of the phallus. Testicular volume was still 2: J3 Q$ t. P5 Y) q. B: j* ?8 _8 i
mL, and the size of the penis remained unchanged.
( \ _/ T- w; l5 U4 E/ c5 @0 y" hThe mother also said that the boy was no longer hav-+ Y6 x8 T/ ?8 K
ing frequent erections.) y2 b6 o2 A7 R9 u ?4 @
Both parents were again questioned about use of
4 D( U/ V% ~& ]9 Iany ointment/creams that they may have applied to
( X! I0 N8 C) m( B- C4 S" ^9 wthe child’s skin. This time the father admitted the* g: p2 n, `% k; O) e' w
Topical Testosterone Exposure / Bhowmick et al 541
. p5 i2 X3 g7 J$ R; |7 v: buse of testosterone gel twice daily that he was apply-
. Q* ~3 V8 g) n8 Z3 Y4 D* Sing over his own shoulders, chest, and back area for$ Q. ]" V9 |. R% z+ M+ I
a year. The father also revealed he was embarrassed
4 j9 ]% \! d8 H4 B8 u4 tto disclose that he was using a testosterone gel pre-
. p+ P( t3 m5 X# kscribed by his family physician for decreased libido
6 d" B/ }- M& c: fsecondary to depression.$ O1 J! }, n0 q$ ~2 c" {/ ?& |
The child slept in the same bed with parents.
( o( z R2 c" @1 i( IThe father would hug the baby and hold him on his6 ?/ B0 [ u0 }- y
chest for a considerable period of time, causing sig-
# D3 w! v A4 G$ o$ I% d* _% a$ R/ Gnificant bare skin contact between baby and father.
7 t; ` j& L, b. q, c6 UThe father also admitted that after the phone call,4 A2 y2 `; d y) O
when he learned the testosterone level in the baby) m: L' }, G" T# T$ [5 d/ Z
was high, he then read the product information
8 I9 i, j7 [ E3 ]$ C$ r. g. \& `packet and concluded that it was most likely the rea-8 R& R' X7 N1 z2 ?! ~$ ]( T3 p, D
son for the child’s virilization. At that time, they
0 d6 z h2 {* Udecided to put the baby in a separate bed, and the
$ H) X' W6 t5 G' O; \- Gfather was not hugging him with bare skin and had
+ Z0 B) E' z: K( O4 O6 Tbeen using protective clothing. A repeat testosterone3 n& T1 [5 T8 Y; |& q- t2 h$ Q7 f
test was ordered, but the family did not go to the: n; d* S, w0 J# @! B
laboratory to obtain the test.
* H* K* I) i; b* y2 P* `' v3 ^Discussion
$ N5 D# H2 X# a- o' r) ePrecocious puberty in boys is defined as secondary
. o: A, A" \' {$ K9 s; Ysexual development before 9 years of age.1,4
( D: B. v0 ^" \6 c- [, Q. I5 ZPrecocious puberty is termed as central (true) when
* D9 z+ O" n* h* Mit is caused by the premature activation of hypo-
: g* }5 T4 i; p' t1 k& {1 {thalamic pituitary gonadal axis. CPP is more com-
6 E; L5 ~8 }' H- X* l5 X8 Zmon in girls than in boys.1,3 Most boys with CPP+ e5 v* a% S' T) H' H) p
may have a central nervous system lesion that is
2 S m9 X2 [/ }0 M! Vresponsible for the early activation of the hypothal-
9 Y# ]/ v. u& D7 \0 [! K8 t5 Bamic pituitary gonadal axis.1-3 Thus, greater empha-# P' z# k# l9 t: V
sis has been given to neuroradiologic imaging in( N4 S* A& R9 w. U7 _6 Q7 A7 y
boys with precocious puberty. In addition to viril-
9 {1 A* E7 B& g" Z4 z, Pization, the clinical hallmark of CPP is the symmet-
0 c x! i8 p" _8 G0 A! |# `, z0 k D* X) orical testicular growth secondary to stimulation by- r' r9 g* C% R4 [4 v4 x/ Z! l/ T
gonadotropins.1,3! \7 q! e( V8 J% [5 P9 C7 a& v& w
Gonadotropin-independent peripheral preco-1 S: }7 x/ W( a. F) A1 W: S) S$ h
cious puberty in boys also results from inappropriate3 m% U; n& _! F: {; U
androgenic stimulation from either endogenous or$ Z" X0 \* ^0 i7 \
exogenous sources, nonpituitary gonadotropin stim-. T/ B1 a5 K4 n8 j
ulation, and rare activating mutations.3 Virilizing- T- \- g$ s8 ?3 `4 ^5 b
congenital adrenal hyperplasia producing excessive
( }4 _- g1 T" W( ?2 ?adrenal androgens is a common cause of precocious
1 ^3 t5 E' a" B. q! B% Mpuberty in boys.3,4
4 O* M# g1 X) ]The most common form of congenital adrenal, q- C; [- L+ o% c
hyperplasia is the 21-hydroxylase enzyme deficiency.' j/ O9 F: f# q# S: M
The 11-β hydroxylase deficiency may also result in6 {3 a) I% K, G
excessive adrenal androgen production, and rarely,
4 z5 d* A8 F5 j. f7 gan adrenal tumor may also cause adrenal androgen
6 a; h! q8 c- X- I1 E2 H( Iexcess.1,31 {6 o* ^5 e, v4 b0 e! c
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
' W- D5 N0 e" y, d. D542 Clinical Pediatrics / Vol. 46, No. 6, July 2007& C2 f) X9 Q- Q, n; c- @1 o
A unique entity of male-limited gonadotropin-
- }( G/ C/ n& [/ t, C. S: J- Iindependent precocious puberty, which is also known. n, J5 d! C9 @8 v! ?# k; E
as testotoxicosis, may cause precocious puberty at a
7 F. C7 B8 e. }: u) Mvery young age. The physical findings in these boys, m# V) i" v, S# o8 r6 ?
with this disorder are full pubertal development,
+ g* o- W1 j* O1 b$ \- v; dincluding bilateral testicular growth, similar to boys! R4 m, _: T) l! l3 e& X$ U1 s4 b- e
with CPP. The gonadotropin levels in this disorder2 f0 q' A/ h; r4 S r
are suppressed to prepubertal levels and do not show9 {- j, N# z+ D4 a3 I
pubertal response of gonadotropin after gonadotropin-- G7 }* s5 z2 @( y2 d8 k, O3 V
releasing hormone stimulation. This is a sex-linked3 s& `; X* u% q. ~ L2 N
autosomal dominant disorder that affects only" `, } s5 X2 r3 U1 n, d4 H8 E: G
males; therefore, other male members of the family6 I# }6 U; D: {' b' e9 g& F! o
may have similar precocious puberty.33 |( Y7 g: `9 t3 A
In our patient, physical examination was incon-+ c& ^' U" n1 X
sistent with true precocious puberty since his testi-0 L7 K; K+ l4 _ C+ f1 N {( e$ t
cles were prepubertal in size. However, testotoxicosis
0 K6 {+ M( v4 g! T9 D1 T" swas in the differential diagnosis because his father& t9 T9 ^1 j) c/ v, \
started puberty somewhat early, and occasionally,
3 }! e8 @2 f$ |4 r4 l. [testicular enlargement is not that evident in the
# q4 g* S0 _1 v4 sbeginning of this process.1 In the absence of a neg-
; y; F' h/ {+ ]6 S; ?( s2 Z* Qative initial history of androgen exposure, our. ~0 ~/ f3 F; q
biggest concern was virilizing adrenal hyperplasia,1 p7 U0 n) z. W$ ?7 j3 G: A
either 21-hydroxylase deficiency or 11-β hydroxylase
: j0 p1 f* Q a/ P+ U! odeficiency. Those diagnoses were excluded by find-
" s W2 y2 e) t: t0 E# A5 {ing the normal level of adrenal steroids.
3 e: ], o; l+ D7 W6 YThe diagnosis of exogenous androgens was strongly V4 `$ V* [- }0 c; J4 y- O
suspected in a follow-up visit after 4 months because
' ?0 h/ t& s! z$ e" O) y1 Othe physical examination revealed the complete disap-* q3 X; R: ~$ I( y V6 n
pearance of pubic hair, normal growth velocity, and
. k9 w, l) X) udecreased erections. The father admitted using a testos-
% e) q9 }/ C3 t1 {9 M- _terone gel, which he concealed at first visit. He was& K0 O8 N# y' j0 o; J( A
using it rather frequently, twice a day. The Physicians’
# l' J5 Q$ f l5 P* I# yDesk Reference, or package insert of this product, gel or
6 _( k3 ~- M# R- j' G. h5 Ncream, cautions about dermal testosterone transfer to
* U* j# q+ V! d7 x( hunprotected females through direct skin exposure., y9 n3 @* |3 ?! K) x; b) j
Serum testosterone level was found to be 2 times the
0 W& Q' j/ i' b: Mbaseline value in those females who were exposed to
4 V2 \" B& i* t6 G( ?even 15 minutes of direct skin contact with their male! w% }8 z4 J& H* D. y4 W
partners.6 However, when a shirt covered the applica-
7 p8 z5 e" |6 Dtion site, this testosterone transfer was prevented.
5 E3 M4 u, U/ t7 J% p sOur patient’s testosterone level was 60 ng/mL,* d% V5 ~( z5 S3 c1 k6 g5 Q
which was clearly high. Some studies suggest that, s9 z8 N: U; {/ y! Q! G
dermal conversion of testosterone to dihydrotestos-
1 F" ]0 R2 |4 L- w+ y; H; _terone, which is a more potent metabolite, is more
3 i' B, ]" j8 h) j& O- yactive in young children exposed to testosterone. A$ E" S b3 l& Y$ S' N
exogenously7; however, we did not measure a dihy-& t% _2 V! m) S! z
drotestosterone level in our patient. In addition to
$ g1 K; N4 C8 S; \8 _# n% C, {" qvirilization, exposure to exogenous testosterone in, a* H, s4 b- o0 s! s8 f
children results in an increase in growth velocity and, c4 }0 H+ A' ?4 c1 ]* j
advanced bone age, as seen in our patient.
0 X: C* T8 X$ W, q& J% d1 }3 UThe long-term effect of androgen exposure during4 Y; {. j9 |8 @# r' P
early childhood on pubertal development and final" }% R5 U( C ^, x
adult height are not fully known and always remain! \/ [# v# G! a/ H" D- p
a concern. Children treated with short-term testos-
6 }; f8 J5 a+ y2 D0 U# S2 `terone injection or topical androgen may exhibit some
; ~6 ^& J8 G2 D! |! |+ f5 cacceleration of the skeletal maturation; however, after N2 S$ F+ \, p0 J# l: w, E
cessation of treatment, the rate of bone maturation" g( ~$ V/ D1 m; W" A
decelerates and gradually returns to normal.8,9
1 m3 c- R9 o6 z/ t& OThere are conflicting reports and controversy
1 d. j% g$ V9 `2 W, `9 p% Y( Yover the effect of early androgen exposure on adult
, U% E: b9 g/ V' Y, _4 \+ Tpenile length.10,11 Some reports suggest subnormal8 g; _1 L5 I5 Z1 B j
adult penile length, apparently because of downreg-
) ?3 H/ W# q, R6 |+ _. V+ bulation of androgen receptor number.10,12 However,
. N$ X. T4 x2 S, g, z' kSutherland et al13 did not find a correlation between
( ?( ]& s% r6 M) Ochildhood testosterone exposure and reduced adult Y B0 X$ `: h; c& d4 P
penile length in clinical studies.8 n1 t. W% t- a {7 M
Nonetheless, we do not believe our patient is' N/ [% J& Q0 w" t4 f
going to experience any of the untoward effects from
8 M) N: Y" r" g- r# u* c* q; v0 u5 }testosterone exposure as mentioned earlier because
; j- s6 k% K, \& Zthe exposure was not for a prolonged period of time.1 V2 G0 B/ m) G. h
Although the bone age was advanced at the time of
- [' G7 {' E( Q) @- y. p* W* N1 hdiagnosis, the child had a normal growth velocity at& Z& R* p" K- D* _# ?
the follow-up visit. It is hoped that his final adult
6 `, m* M# K7 S/ {1 P G& I# l, I* nheight will not be affected.7 K1 m, T& d# B
Although rarely reported, the widespread avail-
* T2 v# |/ L+ k5 a4 k7 \ability of androgen products in our society may! e; b" s" Q7 {9 h' d" W
indeed cause more virilization in male or female
& X# d4 _8 ^; B" k+ Lchildren than one would realize. Exposure to andro-
* |; E; U$ I6 C9 i5 F) m$ J! Sgen products must be considered and specific ques-
5 V/ K* D c( k9 g! T; Y0 |, Gtioning about the use of a testosterone product or$ e+ T4 |: k! f( K! p
gel should be asked of the family members during# t+ I2 g H) P$ |3 k+ a, ~9 l
the evaluation of any children who present with vir-# h; w( E' `. f! ~5 y
ilization or peripheral precocious puberty. The diag-8 D" O# Q0 k$ B
nosis can be established by just a few tests and by
4 f$ s( v6 ]" j, [. ~appropriate history. The inability to obtain such a2 ?1 b$ N2 Y! W$ ^
history, or failure to ask the specific questions, may
1 A9 ]/ p9 L$ O( oresult in extensive, unnecessary, and expensive
) k! k. O' n, b3 Zinvestigation. The primary care physician should be
; H+ `( j! z- ]4 taware of this fact, because most of these children9 {* J6 L7 Z8 q/ X
may initially present in their practice. The Physicians’
- Z: o3 w0 T" ?' a tDesk Reference and package insert should also put a B5 l: y$ _. a' Q, F8 }0 [# `, z
warning about the virilizing effect on a male or
0 d! |$ s# M5 Q& U4 a3 vfemale child who might come in contact with some-! ~. c/ h' \3 |4 b c2 K6 V3 t5 I
one using any of these products.
" e& D% ~ W; {$ }7 RReferences5 t; d& `- e$ E% g7 C
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7 W: t6 ~+ b, \: [and puberty in the male. In: Sperling MA, ed. Pediatric, E/ |+ z5 @) j1 @0 k) Z
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2002: 565-628.
! b% n% ~8 O! W2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
+ a% f! E9 h+ ?, }; R. xpuberty in children with tumours of the suprasellar pineal
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2001;90:751-756.! f- B" N5 b% y
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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Dekker Inc; 2003:211-238.
$ y1 |: O7 |% ]6 }4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
! R# s# s: O9 f3 e' |2 e4 U ^/ Xdevelopment in a two-year-old boy induced by topical
0 Y, [* D1 z, g; L' `& kexposure to testosterone. Pediatrics. 1999;104:e23.
. }: ?0 S8 Y6 f4 x3 A" X9 F4 T2 p. u+ X9 h5. Greulich WW, Pyle SI, eds. Radiographic Atlas of3 m$ \! O! C) N. ]) P$ p
Skeletal Development of the Hand and Wrist. 2nd ed.
: K1 O d! |& W1 KStanford, CA: Stanford University Press; 1959.
( I5 l7 a5 m$ K3 m# G6. Physicians’ Desk Reference. Androgel 1% testosterone,
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