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is a significant concern for physicians. Central
- B+ g/ Z; ~/ ?' k; Rprecocious puberty (CPP), which is mediated
3 H" o/ s! h! S: Ythrough the hypothalamic pituitary gonadal axis, has
; L; _* n+ @) h' w1 Xa higher incidence of organic central nervous system
" ^! v ~4 v% Flesions in boys.1,2 Virilization in boys, as manifested
# H) |- m; a. N, }3 @& wby enlargement of the penis, development of pubic
- W6 L( o5 E7 K( {! b1 Phair, and facial acne without enlargement of testi-# j- U; X9 t6 }9 S1 S0 l4 x
cles, suggests peripheral or pseudopuberty.1-3 We
/ }0 [2 c# h) y# y; e5 t) [report a 16-month-old boy who presented with the
2 q9 X7 b( G5 B+ Wenlargement of the phallus and pubic hair develop-
& H8 }+ I" y' }ment without testicular enlargement, which was due# \* N3 A5 S2 d0 b
to the unintentional exposure to androgen gel used by" U' l" A$ |# h& i& Q* c" W
the father. The family initially concealed this infor-
0 N; V, @* }$ k& O- bmation, resulting in an extensive work-up for this
$ G/ C) T' O5 U0 wchild. Given the widespread and easy availability of
' }2 W) W r- h8 T. N2 |testosterone gel and cream, we believe this is proba-& q, m+ H- {9 P# K0 |
bly more common than the rare case report in the7 |7 X6 m) ?5 L; G
literature.4- L1 x; a; ^0 [" K2 ~
Patient Report
6 d: y8 O7 ?6 |9 p4 z, tA 16-month-old white child was referred to the
2 a1 n! U: b0 U# t! ~endocrine clinic by his pediatrician with the concern
: o5 u g x& }3 V1 B1 O; ~. ~of early sexual development. His mother noticed
/ G4 b5 `3 ~9 n5 Vlight colored pubic hair development when he was
( o' T; J' ?+ a6 g* I9 R) EFrom the 1Division of Pediatric Endocrinology, 2University of
" ]) n" H6 y) D6 a1 W4 lSouth Alabama Medical Center, Mobile, Alabama.
4 e" \" [% G5 M$ VAddress correspondence to: Samar K. Bhowmick, MD, FACE,
. z9 _# X5 E& T) IProfessor of Pediatrics, University of South Alabama, College of- v# C$ r* \5 }: [- b: \
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;1 ]: H# x: t* a0 _- H" ^+ }% W+ x0 O
e-mail: [email protected].
0 w6 b E" [( L( eabout 6 to 7 months old, which progressively became7 E. @% p! v" }! h. d$ P2 ~
darker. She was also concerned about the enlarge-/ O& J O, j: G; L2 f% i! {
ment of his penis and frequent erections. The child; [/ d6 D8 J A! B
was the product of a full-term normal delivery, with; O6 {& d7 o* D
a birth weight of 7 lb 14 oz, and birth length of
6 |+ M8 X* x9 W1 W: m. T r5 P9 I20 inches. He was breast-fed throughout the first year
. M% \* g/ k p# R6 ^, Wof life and was still receiving breast milk along with; F6 J; C: o- [9 F
solid food. He had no hospitalizations or surgery,
+ z8 b$ y+ g4 K4 Q4 r! y* wand his psychosocial and psychomotor development
$ d- M- r$ B# z" K9 m* |1 Ywas age appropriate.
1 |* I* X3 {: ?; zThe family history was remarkable for the father,
( {. y# f6 S' _( n! Z& ^: p% fwho was diagnosed with hypothyroidism at age 16,, D6 D) p! b/ b% v4 Q
which was treated with thyroxine. The father’s
( \6 J) T7 q4 N" E! U0 `height was 6 feet, and he went through a somewhat
7 w9 r* r1 `9 h, g9 @6 uearly puberty and had stopped growing by age 14.
7 l9 M6 n$ A% FThe father denied taking any other medication. The
+ \* r$ j" q9 @; i- y4 C. fchild’s mother was in good health. Her menarche9 R' c! B& t# u) Y: z
was at 11 years of age, and her height was at 5 feet* _ x" ^+ C- c, X7 f8 p9 H
5 inches. There was no other family history of pre-5 Z' I5 j$ \* j' v- N
cocious sexual development in the first-degree rela-
- k' R( Q" z' L( w' z9 z0 p) g: ~tives. There were no siblings.
, u" \+ ?+ N }3 j& T1 `2 R |Physical Examination
9 j1 |+ y N7 ~' n* g* {2 xThe physical examination revealed a very active,
% f$ [0 M& g+ F) z8 |playful, and healthy boy. The vital signs documented- R8 W# t2 E; n$ g, B
a blood pressure of 85/50 mm Hg, his length was1 ~& \/ d9 F) J6 N4 v5 E, l
90 cm (>97th percentile), and his weight was 14.4 kg
, R6 J. h0 a- {" z: Z- x1 `. @(also >97th percentile). The observed yearly growth
$ D ]4 P! A; h, |# qvelocity was 30 cm (12 inches). The examination of
; g" d" m% Q6 ^+ T i% Cthe neck revealed no thyroid enlargement." q: i" s) A/ `, K8 y
The genitourinary examination was remarkable for
# c! a; q8 ?) D1 l8 C7 t, }2 Cenlargement of the penis, with a stretched length of
- T1 c* C0 s# M8 G0 L8 cm and a width of 2 cm. The glans penis was very well2 J. E' c$ {! H' H K2 d! X; g2 J. N) K" p
developed. The pubic hair was Tanner II, mostly around$ R, a* V9 G* ?" v
540$ N7 B6 _- X( \9 b
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% r- e0 [3 U8 j( g7 N# C/ b4 d, N
the base of the phallus and was dark and curled. The
5 v2 d/ }9 R5 g2 ctesticular volume was prepubertal at 2 mL each.7 |7 M* J( _6 B
The skin was moist and smooth and somewhat
9 H. E, {; D" ~8 Joily. No axillary hair was noted. There were no
* Z N2 P' N; q, U* w5 l- B8 w5 n/ _abnormal skin pigmentations or café-au-lait spots.# n8 S8 k1 K! X; ^& i
Neurologic evaluation showed deep tendon reflex 2+5 z2 a% b2 o3 t, W" ?1 N2 i8 C3 f
bilateral and symmetrical. There was no suggestion
1 I" a" H8 b" ]3 M8 _$ eof papilledema.
+ s# M( [( i! r! BLaboratory Evaluation8 c! {$ @! }3 f0 X+ E2 d5 y
The bone age was consistent with 28 months by
: F$ K7 h# }5 X4 T5 ?( Susing the standard of Greulich and Pyle at a chrono-1 H/ A3 i( m0 j. k
logic age of 16 months (advanced).5 Chromosomal
4 \% ^7 j) u6 X' H( ~* j- \karyotype was 46XY. The thyroid function test
& t4 N( s0 z4 Z3 S8 gshowed a free T4 of 1.69 ng/dL, and thyroid stimu-% d4 W9 O1 f- X. J' l0 v7 ]# O
lating hormone level was 1.3 µIU/mL (both normal).
: ~) ~2 {$ \; L6 D. tThe concentrations of serum electrolytes, blood0 b) Z5 G. G7 T; l
urea nitrogen, creatinine, and calcium all were
; x. P9 {7 b) u! K* b9 Xwithin normal range for his age. The concentration
2 R. y) |4 D H! _7 r. \of serum 17-hydroxyprogesterone was 16 ng/dL
1 p8 k, t8 @" x& k(normal, 3 to 90 ng/dL), androstenedione was 20
1 }3 W8 `' a2 E# qng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-# s- ?! ^6 l8 D- `7 q0 p- q3 ]" K
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
0 q2 v7 _5 \: Z7 r2 ]desoxycorticosterone was 4.3 ng/dL (normal, 7 to( v( K5 m+ ~1 G5 k3 Q0 y
49ng/dL), 11-desoxycortisol (specific compound S)# Z5 Z& b) a" b
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-, F2 s, Q4 T7 ]9 w; V* o( }" ]
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
( Y! w4 f/ r5 y' z* ^$ b3 {! utestosterone was 60 ng/dL (normal <3 to 10 ng/dL),: X: `0 g- O' ~5 |* x% z
and β-human chorionic gonadotropin was less than
0 x7 A# e. S7 z5 Q3 @4 D5 mIU/mL (normal <5 mIU/mL). Serum follicular( ^) ^, ?. R! k) c& S4 s3 ]
stimulating hormone and leuteinizing hormone2 i/ n1 A# m( L, y# L8 A- A
concentrations were less than 0.05 mIU/mL* E7 J, A: Y1 s2 K. [* I6 s
(prepubertal).
' ]- K- A; `( IThe parents were notified about the laboratory
/ \) N; A& p1 N& ]# k" y. ~results and were informed that all of the tests were/ A+ t9 u& B' \4 G: I$ g' k) X
normal except the testosterone level was high. The
; `: F: o0 c0 x8 \) o: _8 \follow-up visit was arranged within a few weeks to
% L' w" \1 Y* m L$ |obtain testicular and abdominal sonograms; how-
: t- g$ n8 S4 J# m Iever, the family did not return for 4 months." ^' K* I& I2 H6 h
Physical examination at this time revealed that the& D% H7 H$ u9 l
child had grown 2.5 cm in 4 months and had gained
# V* }" X4 i7 Q8 r2 kg of weight. Physical examination remained& e- h/ b% q [2 K: v2 N
unchanged. Surprisingly, the pubic hair almost com-
- o( y5 N0 b: R; Epletely disappeared except for a few vellous hairs at
9 I, {* I- Q2 b+ k3 f. Mthe base of the phallus. Testicular volume was still 2
" r* O6 b* T$ i: r* J6 DmL, and the size of the penis remained unchanged.3 \1 P3 P* }! i) y x7 M- d3 ^
The mother also said that the boy was no longer hav-
. @* z$ d0 t9 u7 z/ ?& \ing frequent erections.
$ Q M) W" }; I! {' P7 V! HBoth parents were again questioned about use of' R" l8 _( V" h @% r g: m
any ointment/creams that they may have applied to) {9 [! N! }/ L+ A5 ^- E* b9 x
the child’s skin. This time the father admitted the
: M# k5 ^) m; h* `- \5 V M! NTopical Testosterone Exposure / Bhowmick et al 541
/ ^+ x0 p; e& Tuse of testosterone gel twice daily that he was apply-
1 `# k* u, a$ I9 R" |8 sing over his own shoulders, chest, and back area for! X s" p6 S$ W; E
a year. The father also revealed he was embarrassed
% Z8 ~$ v6 x6 K* M( _/ g3 `3 `: kto disclose that he was using a testosterone gel pre-
6 I' X+ N( s! `" ~3 wscribed by his family physician for decreased libido& P2 |7 k- s: [1 N
secondary to depression.5 d4 ]! f4 ~6 j) V
The child slept in the same bed with parents.; s" [3 a S; O3 E2 f
The father would hug the baby and hold him on his. U, u# [3 Q) T1 `4 R- e
chest for a considerable period of time, causing sig-, }$ i( Z* f3 h$ `( P
nificant bare skin contact between baby and father.
' Y( f$ b( T0 f. PThe father also admitted that after the phone call,
6 F) _! `% U+ [% q5 b2 d4 ~when he learned the testosterone level in the baby
6 i: o |( [( i( w2 Rwas high, he then read the product information
% C. }/ _1 B+ h; v" U8 rpacket and concluded that it was most likely the rea-/ ~6 R w9 Q% t- ]
son for the child’s virilization. At that time, they
; Y8 n1 d) M; K( {! U4 w T3 bdecided to put the baby in a separate bed, and the. i# {8 M9 G) o7 O! Y
father was not hugging him with bare skin and had- T: p) h/ @. F6 e3 O A" f
been using protective clothing. A repeat testosterone
& w7 I) t. E2 M; W/ R* Mtest was ordered, but the family did not go to the. j4 l4 S" L: g6 J% k2 H
laboratory to obtain the test.6 n8 }' I3 S+ W( R3 ?9 W
Discussion
6 {- C6 n- v# a6 |! \Precocious puberty in boys is defined as secondary. \8 e7 E* z$ b
sexual development before 9 years of age.1,4
0 e& z2 D2 |& u( G! G& Q MPrecocious puberty is termed as central (true) when6 `% h/ k9 ?& g2 {& \
it is caused by the premature activation of hypo-
- W( m% C0 k; @+ b4 K+ Hthalamic pituitary gonadal axis. CPP is more com-
* @' S2 _% C, F+ I# t Vmon in girls than in boys.1,3 Most boys with CPP# w/ E5 K; Y5 u% j
may have a central nervous system lesion that is2 T" L0 r6 Y- z& R
responsible for the early activation of the hypothal-
Q; O1 s" V" D; z6 L/ i: x6 Ramic pituitary gonadal axis.1-3 Thus, greater empha-
4 S# v; Q( e' f2 v$ Y. x2 h0 Vsis has been given to neuroradiologic imaging in' U2 C H8 U( p9 _$ A
boys with precocious puberty. In addition to viril-2 |4 Q9 M+ o; W- h
ization, the clinical hallmark of CPP is the symmet-3 h- @* P0 V/ U0 [! ~! p
rical testicular growth secondary to stimulation by. r1 [& Y8 D3 H' A" r8 w
gonadotropins.1,3
# a% U2 f. O$ AGonadotropin-independent peripheral preco-
& d& Q1 G5 j) X- Z( L/ a' bcious puberty in boys also results from inappropriate! b+ F2 b" `8 i& ~8 @ E3 `8 T2 L
androgenic stimulation from either endogenous or- a2 P$ V' U3 G+ I5 V3 V
exogenous sources, nonpituitary gonadotropin stim-2 e* h% f! p$ z; m7 U; L8 b
ulation, and rare activating mutations.3 Virilizing; K U. C, n3 T
congenital adrenal hyperplasia producing excessive
! A" m1 O0 {2 radrenal androgens is a common cause of precocious- V- y& s) j* z% u) J
puberty in boys.3,4" i5 ^6 \7 J" X( M2 w7 i6 q* J# u
The most common form of congenital adrenal$ A4 `( w# g# Q' ^ x* Q3 T% q
hyperplasia is the 21-hydroxylase enzyme deficiency.
5 C$ G( _ f: U& D: bThe 11-β hydroxylase deficiency may also result in) J) ^3 `0 s& e8 t r) A/ c) P' p1 L% T
excessive adrenal androgen production, and rarely,$ o& `5 r% V& @: g' S% n
an adrenal tumor may also cause adrenal androgen5 M, X" H/ Q5 K( b
excess.1,32 k0 s) m c C. l. N4 K$ v/ ?
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
3 O+ v; a+ i0 Q- q3 |( n6 v; k542 Clinical Pediatrics / Vol. 46, No. 6, July 2007; g" u) \3 h# e4 @1 u) @
A unique entity of male-limited gonadotropin-; O( E6 {: K5 G% ~9 D
independent precocious puberty, which is also known+ f/ M2 l2 t' o
as testotoxicosis, may cause precocious puberty at a8 M* I/ o D, F% a* \ c2 p
very young age. The physical findings in these boys$ O# H" J5 b% ?
with this disorder are full pubertal development,
. V* k$ {( t7 m# J; rincluding bilateral testicular growth, similar to boys
8 L. y! m! ~2 Z- \1 t# iwith CPP. The gonadotropin levels in this disorder
j" U8 ^' ]' A$ b2 @% Y' q& d% Kare suppressed to prepubertal levels and do not show
7 g' w1 m9 `' Y/ Gpubertal response of gonadotropin after gonadotropin-8 B$ e& E' U! g. s$ g% [
releasing hormone stimulation. This is a sex-linked8 ]7 m2 ~) a; v" T! a; `
autosomal dominant disorder that affects only" S+ n) h# }5 m
males; therefore, other male members of the family
5 [0 X7 {4 f3 q: ^7 Jmay have similar precocious puberty.3( w7 A3 N y$ L) P
In our patient, physical examination was incon-2 ]6 P" s9 y) Q: w* L! v* w
sistent with true precocious puberty since his testi-! j. u& y9 c0 U ^' j% Y
cles were prepubertal in size. However, testotoxicosis
+ R) o/ ^% U# m3 v* G* d5 @was in the differential diagnosis because his father: `: t5 p7 t7 {# G! c3 Q- E
started puberty somewhat early, and occasionally,
. x% e3 z, u" i% k2 {testicular enlargement is not that evident in the$ L( p+ F# |& l& d2 r: g7 A
beginning of this process.1 In the absence of a neg-
% |; L+ c/ q7 P, ^% O! w9 B% G3 iative initial history of androgen exposure, our
7 q- C! O7 s3 l2 p' D; U2 L) `biggest concern was virilizing adrenal hyperplasia,( u: \$ Q- Q: d) a: Y
either 21-hydroxylase deficiency or 11-β hydroxylase
- W1 I+ j! m) ]1 tdeficiency. Those diagnoses were excluded by find-& J2 Y3 O2 o- P. I4 f- f; e
ing the normal level of adrenal steroids., X- t; _% z+ E/ x8 C& M
The diagnosis of exogenous androgens was strongly4 |- m7 d, O3 g' [8 y. I
suspected in a follow-up visit after 4 months because
* P9 H4 B# S3 Z- f5 z6 g; Z5 fthe physical examination revealed the complete disap-8 H: ~8 ?6 l; i/ F- I+ O! y" H
pearance of pubic hair, normal growth velocity, and/ a& ~9 v" f9 t
decreased erections. The father admitted using a testos-( e: g) N0 S9 [9 G& |
terone gel, which he concealed at first visit. He was
8 P T% F* [1 K: t& L- R* Jusing it rather frequently, twice a day. The Physicians’
v8 B! b3 J2 j/ w) s7 Z% nDesk Reference, or package insert of this product, gel or9 M9 H6 P* `" B1 D0 M' z
cream, cautions about dermal testosterone transfer to6 \8 ^8 g! N3 Y4 }% Z5 O$ ?1 C
unprotected females through direct skin exposure.' G+ [. b; L& X" e2 @8 V _) O, x
Serum testosterone level was found to be 2 times the
* g. ]8 Z8 q3 a1 ^. K- a( t' f) R0 hbaseline value in those females who were exposed to. u- g" e( P* f6 }' O6 O
even 15 minutes of direct skin contact with their male! [8 \+ i0 J) i& X% E$ ?
partners.6 However, when a shirt covered the applica-
8 J; e+ M* n g: Ation site, this testosterone transfer was prevented.
# k2 J2 [2 w7 A X! @: ^# k5 rOur patient’s testosterone level was 60 ng/mL,
3 A! i# M% S$ p7 uwhich was clearly high. Some studies suggest that
0 t5 Q& F, |/ A0 Vdermal conversion of testosterone to dihydrotestos-
; E, a9 T# J& m# t: Qterone, which is a more potent metabolite, is more
2 Q% l/ `% l( V6 h& y' Eactive in young children exposed to testosterone
- [( R9 v. g# L0 H" jexogenously7; however, we did not measure a dihy-5 x# b# ?8 J7 m& {
drotestosterone level in our patient. In addition to v9 v0 Y k9 y" I
virilization, exposure to exogenous testosterone in
~0 ^8 E( T) Q$ M" a5 q2 T) xchildren results in an increase in growth velocity and
9 a. P" C* J; F7 y2 U: F* Zadvanced bone age, as seen in our patient.
+ [, M( T7 y3 t/ }) N FThe long-term effect of androgen exposure during5 I e$ \6 q% i. z( A) T3 I. C' |
early childhood on pubertal development and final6 A% s' n( K. O# h
adult height are not fully known and always remain; w3 E& y _3 L8 A6 E2 ]% |- Q7 C
a concern. Children treated with short-term testos-4 s- L$ j( B7 m! G$ m! v$ G
terone injection or topical androgen may exhibit some3 N, ~8 Y+ o" x; S5 t
acceleration of the skeletal maturation; however, after
" K2 f C9 O7 y4 i' Ecessation of treatment, the rate of bone maturation' u. j6 O8 g0 P1 u. z% n
decelerates and gradually returns to normal.8,9# [3 Y2 |1 r J( [& s
There are conflicting reports and controversy: x. h3 x. q$ ], d3 b
over the effect of early androgen exposure on adult: A# b* u9 W# h
penile length.10,11 Some reports suggest subnormal
) [6 z a6 B7 |adult penile length, apparently because of downreg-" d7 h- @# c, |' A, U
ulation of androgen receptor number.10,12 However,
, J4 u2 w2 y, @# P3 P" `' Z0 a. D# ]Sutherland et al13 did not find a correlation between b- s, m# @& W& D
childhood testosterone exposure and reduced adult
4 L% o' `: t8 E* Q M6 O% bpenile length in clinical studies.# ~( h. _/ w2 d6 _& d
Nonetheless, we do not believe our patient is
- z$ o6 }2 Y8 ggoing to experience any of the untoward effects from- n( j) _# }! b+ I, [/ u( ^
testosterone exposure as mentioned earlier because
/ E7 @/ Q3 S0 T+ othe exposure was not for a prolonged period of time. y( z1 G) H9 B) C% Y1 W
Although the bone age was advanced at the time of- P, g0 k8 _" W" \; L% w, u$ |9 p" I- a
diagnosis, the child had a normal growth velocity at
" ?" l- h$ d: s+ Y+ n: [the follow-up visit. It is hoped that his final adult" ?: T, V( r) p+ C: w6 s" u# A
height will not be affected.
) G0 `! ?5 P- q& h/ nAlthough rarely reported, the widespread avail-
9 \7 q3 O: f: C+ E. l2 t2 [ability of androgen products in our society may& }5 i' v& l% e& c; N
indeed cause more virilization in male or female, H, i; P; @! W9 K% F0 d
children than one would realize. Exposure to andro-# U0 Y8 v3 [+ E$ }+ X' S- ?
gen products must be considered and specific ques-
& U+ _* Q8 p( u! A* w7 stioning about the use of a testosterone product or
1 n- d& j) L1 H' Ugel should be asked of the family members during0 r3 m! n& X5 s; q- e
the evaluation of any children who present with vir-1 x( Y8 W6 X5 t! h: P8 k$ e! i% b
ilization or peripheral precocious puberty. The diag-% Z( Q& |+ e, }& ]* W1 N
nosis can be established by just a few tests and by
: J; C3 a% ?9 _* a- z0 Z& v2 iappropriate history. The inability to obtain such a
5 a8 h) V' B/ c* e2 Phistory, or failure to ask the specific questions, may
8 M9 P+ T t% l$ b/ m! @* Fresult in extensive, unnecessary, and expensive
) g9 I: G1 S3 S! u: [0 binvestigation. The primary care physician should be0 ~! E% z: s' n% ]7 w6 _+ j
aware of this fact, because most of these children
' H) |: Z) F% n( _" L, u) J/ L! A8 Qmay initially present in their practice. The Physicians’- P8 \8 F7 M" a
Desk Reference and package insert should also put a1 C4 R0 D( \0 C) m
warning about the virilizing effect on a male or4 l5 A$ w4 ~9 M) P. f& N/ s
female child who might come in contact with some-( u0 N9 V% a' L
one using any of these products.
+ }, C; h& }& O: ] a( b! AReferences4 W; V0 F& h) ~/ v+ W
1. Styne DM. The testes: disorder of sexual differentiation7 x: M8 d* k( Z- T, {' [ v% a4 Y
and puberty in the male. In: Sperling MA, ed. Pediatric1 W( t% V4 z0 {0 l N
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;) W* \2 y$ ~7 x1 [0 q: |
2002: 565-628.8 d+ s6 w. _8 m0 h0 B
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious1 E9 t, N( W2 Y# D3 e
puberty in children with tumours of the suprasellar pineal; v. z# p& \( W# S( `# W- X, R
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Topical Testosterone Exposure / Bhowmick et al 543
w( c! t% D* C5 Z( a' `8 Y1 {# sareas: organic central precocious puberty. Acta Paediatr.
1 K5 v# N: k& P1 W2001;90:751-756.( t% ^7 X! @/ o+ Y, r
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
1 z: Y+ d3 _: K6 K2 S' N4 O3 ]Pediatric Endocrinology. 4th ed. New York, NY: Marcel5 u$ Q+ m- B5 |9 G
Dekker Inc; 2003:211-238.
1 A8 X6 E: W3 S% |/ n, i3 U4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual; }9 z g, g5 }7 O' W: f
development in a two-year-old boy induced by topical% e' e r1 {# r; x9 l) A
exposure to testosterone. Pediatrics. 1999;104:e23.# t: Z/ d( Z* f. H
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of; ]2 e/ t3 r {
Skeletal Development of the Hand and Wrist. 2nd ed.
) V! g5 v4 Y8 V: @! P+ Y. I7 n5 LStanford, CA: Stanford University Press; 1959.* H2 m7 o& C6 P9 X3 E$ ]5 f
6. Physicians’ Desk Reference. Androgel 1% testosterone,) Y; S5 u! `8 [( t) A
Unimed Pharmaceutical Inc. Montvale, NJ: Medical0 `5 \+ w- f( n, Q0 F; w, F
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