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is a significant concern for physicians. Central2 |2 `( f/ G4 I0 \
precocious puberty (CPP), which is mediated$ D3 g" D! k- E7 n: f
through the hypothalamic pituitary gonadal axis, has% K- _/ H- |. z3 y- K* x
a higher incidence of organic central nervous system4 d5 I, r5 T) m5 k n2 J- \8 ?
lesions in boys.1,2 Virilization in boys, as manifested
+ m/ y l% B- w$ hby enlargement of the penis, development of pubic# D1 ]. h2 e/ h' h4 D9 Q# P& n# N) v: U
hair, and facial acne without enlargement of testi-
! E# r: S! [1 T" d5 `cles, suggests peripheral or pseudopuberty.1-3 We
( Y' _. P+ J4 greport a 16-month-old boy who presented with the
% J3 u |( [# p! g; P0 r0 k4 a8 c4 }enlargement of the phallus and pubic hair develop-, _* ?/ F8 E% Q, v. `/ K) a
ment without testicular enlargement, which was due
4 q* J1 W/ R2 G' oto the unintentional exposure to androgen gel used by, k2 C. \. k4 v; ?! `
the father. The family initially concealed this infor-
5 H: B% Y5 ^0 gmation, resulting in an extensive work-up for this
) o; G' V4 [2 b, [2 I) Ochild. Given the widespread and easy availability of7 G3 d) Q2 V8 z
testosterone gel and cream, we believe this is proba-
" X8 F6 K t, Z1 A0 L5 Ybly more common than the rare case report in the
6 ]# j. a4 m0 i& s& G3 Hliterature.44 A2 S6 O1 X$ O) T, _
Patient Report4 B. J [0 i# R. [: a* s% w* E
A 16-month-old white child was referred to the
" U& K! {* ?( x, t; N9 n4 ?endocrine clinic by his pediatrician with the concern
7 \7 e6 o4 r( b9 t# f) \$ }1 Nof early sexual development. His mother noticed" u8 y: x1 d& I8 `
light colored pubic hair development when he was4 s; U4 U- I9 K5 q( _5 ^* ~
From the 1Division of Pediatric Endocrinology, 2University of9 ?; S7 p% E V' E. {5 Q# c/ f
South Alabama Medical Center, Mobile, Alabama.
9 K( }& e. ? ]' _1 m" ?Address correspondence to: Samar K. Bhowmick, MD, FACE,
; `. L& H5 q' [2 [* a& l' uProfessor of Pediatrics, University of South Alabama, College of6 k1 @, V: F& L% [! q" p# R
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
! W" T% ]5 l) m2 Y! ^5 N8 Q m& k. de-mail: [email protected].+ V* } H4 S5 x9 n8 O3 S
about 6 to 7 months old, which progressively became
) c/ T: f( C% r/ ndarker. She was also concerned about the enlarge-
, S$ u, i* m* J: G. F3 K; Gment of his penis and frequent erections. The child
( ?# o- ^" i$ y' \* f5 a" P+ pwas the product of a full-term normal delivery, with
2 ~' Y" J. d- U4 ca birth weight of 7 lb 14 oz, and birth length of
& A+ _1 X1 D8 @* S0 \# B20 inches. He was breast-fed throughout the first year: t+ \; l# u8 s5 N
of life and was still receiving breast milk along with. l/ {5 w9 v7 o4 f2 }4 {$ f
solid food. He had no hospitalizations or surgery,4 W8 z' ?6 R; F1 S
and his psychosocial and psychomotor development
E! U! [, `2 ~8 F! H; @ ?was age appropriate.6 y/ Q4 D. g A) ~2 V! F6 O
The family history was remarkable for the father,9 t' F$ q4 t) P/ `6 j. E
who was diagnosed with hypothyroidism at age 16,, N8 ]) f. C; q5 H- }' z0 x- A) x
which was treated with thyroxine. The father’s
7 v# k3 k& [8 g* g% k( Sheight was 6 feet, and he went through a somewhat* @! h9 {1 p6 V
early puberty and had stopped growing by age 14.
; V1 H+ h; C* O- j% c! K! p7 E1 N YThe father denied taking any other medication. The
2 a) ~# w- f1 v: S; ]5 Jchild’s mother was in good health. Her menarche9 w) ~5 U& d$ x. m) S' Q
was at 11 years of age, and her height was at 5 feet1 a [* j! a3 t/ q1 ~5 T6 h
5 inches. There was no other family history of pre-
r. d9 W5 X) I3 j( W" M0 K; X; {cocious sexual development in the first-degree rela-/ x0 r, |, C- T z9 p2 M7 o- t' f8 w
tives. There were no siblings.
" s$ E j+ }" HPhysical Examination
' v3 _0 e, Z4 X8 ?) z3 `! e! }' dThe physical examination revealed a very active,: e5 X5 k1 L, q* `/ Q6 c& `
playful, and healthy boy. The vital signs documented9 g* m) ~* ]; ?* K, ]: E/ W' O( L
a blood pressure of 85/50 mm Hg, his length was' M$ ~! ^0 X; x
90 cm (>97th percentile), and his weight was 14.4 kg
/ i2 n4 P. {, ](also >97th percentile). The observed yearly growth
" Q7 H3 }5 n3 m) d+ x1 Cvelocity was 30 cm (12 inches). The examination of5 ^& m6 C1 p! o* r
the neck revealed no thyroid enlargement.; M% a5 J3 [1 ^) K7 `
The genitourinary examination was remarkable for7 O7 x, n! q8 N- Y5 x
enlargement of the penis, with a stretched length of+ P( Q+ a, e8 E) b$ H8 Z" Z
8 cm and a width of 2 cm. The glans penis was very well& n; _+ o& Z# V( j; s, a
developed. The pubic hair was Tanner II, mostly around8 |# s+ f4 M' h# i% W" s0 V
540
8 h- P6 P. R) J' rat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
. |. G K& C8 h% Y% U+ L* J, `the base of the phallus and was dark and curled. The5 y% X# U( K3 m+ I. e* q
testicular volume was prepubertal at 2 mL each.1 n% M: r, ?- q: o& [
The skin was moist and smooth and somewhat7 S6 w! T- K) I. P
oily. No axillary hair was noted. There were no
) b6 _1 e# T4 w5 w( I$ j2 jabnormal skin pigmentations or café-au-lait spots.
+ k6 q' [5 \8 K3 w4 ~8 GNeurologic evaluation showed deep tendon reflex 2+
0 X, B |" v9 b6 o6 F8 Ubilateral and symmetrical. There was no suggestion$ w* D$ j L4 t( ~; F- w, _) s
of papilledema.
% R3 ]% e" q# `3 ZLaboratory Evaluation
7 z4 `1 h6 {6 M- R2 Q2 v) F2 w4 {! WThe bone age was consistent with 28 months by! i. M! O0 _/ N
using the standard of Greulich and Pyle at a chrono-* V) Y' {# o, S: Z" J; z
logic age of 16 months (advanced).5 Chromosomal
5 X8 t& |3 A/ ikaryotype was 46XY. The thyroid function test
' A/ p6 r( M" o5 s& }/ {showed a free T4 of 1.69 ng/dL, and thyroid stimu-3 Q1 [$ H; H% p3 y3 n. O
lating hormone level was 1.3 µIU/mL (both normal).1 ^4 R6 ?* h4 T, y0 A. k
The concentrations of serum electrolytes, blood
7 C% {) L. x# R4 {# m8 @4 Iurea nitrogen, creatinine, and calcium all were( i8 i3 O J. E% S9 N& H5 L1 |
within normal range for his age. The concentration
/ Y4 i, Q, N6 D* a, ]: ]( C- Cof serum 17-hydroxyprogesterone was 16 ng/dL# W* B1 p2 {% u4 Q: W3 m0 D
(normal, 3 to 90 ng/dL), androstenedione was 20
7 o( j0 v2 {7 ~0 D' ^ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-# b4 C& |3 e3 I' @7 _
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
6 u4 A- w8 U3 _8 {' kdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
3 i. w+ ~: ^8 ^2 z- i( Y8 L49ng/dL), 11-desoxycortisol (specific compound S)
5 e! V3 Z) M2 E5 Nwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
2 g6 N0 K: N: M- S! |tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
2 c6 z: W# c! q% y1 `( O1 i; Ctestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
; G% w1 O; \/ z7 B: nand β-human chorionic gonadotropin was less than! L& y. \1 p2 V9 U& Y; k
5 mIU/mL (normal <5 mIU/mL). Serum follicular* A. T! ]* O9 X. U; B" ^9 X& i
stimulating hormone and leuteinizing hormone1 A8 w" Z2 ]1 _4 @1 M
concentrations were less than 0.05 mIU/mL! B7 G4 p3 M4 I/ ^
(prepubertal).
% A( }* }7 t/ L- F" aThe parents were notified about the laboratory: B/ x8 K: |; `: V2 @ b
results and were informed that all of the tests were
, P$ n! `0 y6 v3 W1 j- o* {normal except the testosterone level was high. The
* i I. U/ o9 a" J( N4 ufollow-up visit was arranged within a few weeks to8 H" b7 d1 N+ r/ h( o M% v3 W
obtain testicular and abdominal sonograms; how-
8 E& O) P* u/ p+ q4 X( Bever, the family did not return for 4 months.6 D0 Z4 V2 V1 T7 F/ f
Physical examination at this time revealed that the
- I, _0 G* f% G0 d% g9 Echild had grown 2.5 cm in 4 months and had gained: P0 R, I8 t) C
2 kg of weight. Physical examination remained
4 T# T5 u/ O, Y" ^unchanged. Surprisingly, the pubic hair almost com-
0 q8 z& Q& K' r6 c! f3 _; kpletely disappeared except for a few vellous hairs at
- w) G2 l0 d7 A4 Gthe base of the phallus. Testicular volume was still 2
! |$ U( I4 s0 G4 @1 o6 T- @: ?mL, and the size of the penis remained unchanged.
" M6 `' g2 c9 e' q( YThe mother also said that the boy was no longer hav-* K1 M0 n! J& }3 e4 k: G
ing frequent erections.+ o. A0 X1 h+ ]" v( E+ C! \& J$ E* {
Both parents were again questioned about use of: W3 T4 c. X: k0 h5 g7 s
any ointment/creams that they may have applied to
; [! k& E$ L$ }the child’s skin. This time the father admitted the) p9 ^/ }0 \8 ]& K+ [8 p
Topical Testosterone Exposure / Bhowmick et al 541
- c P! }& h% Guse of testosterone gel twice daily that he was apply-: _. D/ g/ b3 x
ing over his own shoulders, chest, and back area for
& X8 N/ }4 g# i. | V, J4 da year. The father also revealed he was embarrassed& o" y0 k/ j+ @
to disclose that he was using a testosterone gel pre-
. {2 I# W# B c. @+ w% M+ O7 D `scribed by his family physician for decreased libido
% ^4 q5 Z5 h; q1 U: r% Q' t8 esecondary to depression.
* P& A# W5 X% R ]3 `$ |8 a' `The child slept in the same bed with parents.8 n% C( @, w9 r
The father would hug the baby and hold him on his5 w5 x! d' r+ c+ s: U$ {" X# M! k
chest for a considerable period of time, causing sig-
; G" M$ m7 p0 s; _5 J* [nificant bare skin contact between baby and father.
" J! e$ b% f6 O* w7 b5 \/ Q. E5 O6 RThe father also admitted that after the phone call,4 `$ b, o! L4 i' c v
when he learned the testosterone level in the baby2 S+ \7 l& b4 ?( h
was high, he then read the product information
8 D& s w7 z5 a: _, D! Ipacket and concluded that it was most likely the rea-
1 n6 l- T. {5 A# \+ w. v; S) }son for the child’s virilization. At that time, they
0 k% K: W2 o. f) Adecided to put the baby in a separate bed, and the4 _) W* X i; d& @- [" [
father was not hugging him with bare skin and had/ i: i1 h1 x$ C$ u
been using protective clothing. A repeat testosterone
+ U. ^ K3 d7 U5 R" B! \& Atest was ordered, but the family did not go to the1 R M1 t+ [/ q
laboratory to obtain the test.
3 u) w. R0 j" r- P- A" B$ L" \. ^Discussion
/ b5 q" J8 z8 a0 X9 kPrecocious puberty in boys is defined as secondary" f8 q: S* h: ]7 B! v/ G
sexual development before 9 years of age.1,4
- [! H w( [! F( C; Z" C( LPrecocious puberty is termed as central (true) when# n" H1 F! z( z6 D6 V% ~
it is caused by the premature activation of hypo-! ]9 `# P( s# q$ ?
thalamic pituitary gonadal axis. CPP is more com-
~- f# D: Z# a4 p7 ]1 Smon in girls than in boys.1,3 Most boys with CPP1 i2 ?9 |' f4 e8 D
may have a central nervous system lesion that is) u9 C% N# l- J. Z8 H
responsible for the early activation of the hypothal-
) \* m3 `7 v: @( kamic pituitary gonadal axis.1-3 Thus, greater empha-3 }$ W# C$ m8 a. ]* g% r+ a
sis has been given to neuroradiologic imaging in
9 ^# m+ h1 N% q7 m4 tboys with precocious puberty. In addition to viril-
; O" J3 b5 }. o; p7 a4 kization, the clinical hallmark of CPP is the symmet-2 D6 T+ e8 L) P. i0 b2 N/ V
rical testicular growth secondary to stimulation by, O4 W) M& p2 c ]6 Y0 l# H3 e( A
gonadotropins.1,3
3 t6 O2 Q& F I+ z* BGonadotropin-independent peripheral preco-
+ e8 @+ [4 |$ R/ w( }% Y6 ^6 @, { bcious puberty in boys also results from inappropriate
9 k$ p a: D# O) ~+ j5 P. @androgenic stimulation from either endogenous or8 Z0 q; M, F) g9 h" x+ C$ `2 b
exogenous sources, nonpituitary gonadotropin stim-
% D7 q8 j: k3 y! n- T' Eulation, and rare activating mutations.3 Virilizing2 h+ j) d) K% d! D/ X3 z
congenital adrenal hyperplasia producing excessive
* U {1 i+ W6 B K1 padrenal androgens is a common cause of precocious, O2 Q0 T! q1 u& {
puberty in boys.3,4
' O( _6 x1 h7 s! cThe most common form of congenital adrenal) y0 i# U. P. I T2 v* Z' {, A4 `
hyperplasia is the 21-hydroxylase enzyme deficiency.
+ \' f2 Q" _0 T `The 11-β hydroxylase deficiency may also result in& M4 C( V/ _) a
excessive adrenal androgen production, and rarely, f7 c" D+ l% s
an adrenal tumor may also cause adrenal androgen
+ @% Y; S6 `2 }5 s! g* M0 dexcess.1,3
0 t* x& s `& R! c0 bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from- L* r4 s9 [5 t
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
6 G9 m3 r9 \ l& GA unique entity of male-limited gonadotropin-$ L/ W# B r/ V1 c. k2 ~! f
independent precocious puberty, which is also known' ^/ K* a0 o) \# p# m% }) l
as testotoxicosis, may cause precocious puberty at a
" u* s6 h& R w' ?2 J& V# ]; Cvery young age. The physical findings in these boys
: ?! g x. g: Uwith this disorder are full pubertal development,
! |) s3 n: H& A' O* e! ^0 _including bilateral testicular growth, similar to boys
3 j) h# b! e7 R% O0 R' mwith CPP. The gonadotropin levels in this disorder. w' `0 o7 P) c* O6 r5 q5 A1 p' \( i
are suppressed to prepubertal levels and do not show
( E: L& ?' v) Ppubertal response of gonadotropin after gonadotropin-: X8 D2 A$ y d+ n/ U9 z
releasing hormone stimulation. This is a sex-linked. l" G" C, P: s7 t1 s" o p) L
autosomal dominant disorder that affects only- O5 |/ g5 }! o7 A3 K- d4 e& e
males; therefore, other male members of the family1 o: i7 q+ F( E
may have similar precocious puberty.3' k, P, ~ v, @) D+ |
In our patient, physical examination was incon-
4 B" H9 I7 q3 d9 Z) G7 R, qsistent with true precocious puberty since his testi-
" P7 ?$ p/ H. k8 k: Zcles were prepubertal in size. However, testotoxicosis
5 c$ ?' N* a' p, G$ A( Mwas in the differential diagnosis because his father
6 d$ M( Y4 x* n4 T+ j# t, @started puberty somewhat early, and occasionally,
+ o( I, O/ D" d$ I1 {5 g: y2 p5 Qtesticular enlargement is not that evident in the
- @- }1 g7 a( E l! R8 y% F, Fbeginning of this process.1 In the absence of a neg-8 D( ?( s% l. @
ative initial history of androgen exposure, our
8 b) s+ E; f! e- Y$ Abiggest concern was virilizing adrenal hyperplasia,
6 Y8 G& n* R# z0 T6 }5 Qeither 21-hydroxylase deficiency or 11-β hydroxylase
$ q, m% i& y3 i8 fdeficiency. Those diagnoses were excluded by find-; B% y. l4 U' c6 o* w
ing the normal level of adrenal steroids.1 |- O5 l. t% K5 W# ~! N% \- ~( W6 i
The diagnosis of exogenous androgens was strongly
2 T$ R. z$ j4 L/ Osuspected in a follow-up visit after 4 months because+ g! g$ `8 b% e M* w' X
the physical examination revealed the complete disap-
) b* ~ m6 j0 ?" B& c* Wpearance of pubic hair, normal growth velocity, and n* Y, y9 V6 O( l9 A+ T2 ^. m$ C8 Y
decreased erections. The father admitted using a testos-
! r8 b/ ^% ?$ W# p0 ^1 z! nterone gel, which he concealed at first visit. He was& d' F" a0 A& W( [& N5 J; F/ `5 {
using it rather frequently, twice a day. The Physicians’; R! N+ @1 N4 V1 E
Desk Reference, or package insert of this product, gel or* v- H# u4 |1 m/ Z; W4 K. Q
cream, cautions about dermal testosterone transfer to
( S8 j v5 d% i+ c; e/ t9 u* Eunprotected females through direct skin exposure., Q! d; O) K7 z$ L q8 a$ j
Serum testosterone level was found to be 2 times the
) L6 ~; R' {& L2 c% m: Sbaseline value in those females who were exposed to
7 Z+ C$ ^4 T, F' l' ceven 15 minutes of direct skin contact with their male" c" K( ]5 s4 |! |$ D7 M/ b
partners.6 However, when a shirt covered the applica-: q2 F* a2 s$ A
tion site, this testosterone transfer was prevented. o ^0 @* q" H5 }0 M$ m
Our patient’s testosterone level was 60 ng/mL,
8 ?, r" N# a' a; ~which was clearly high. Some studies suggest that
9 c- o+ ?8 u0 f7 s( cdermal conversion of testosterone to dihydrotestos-: @& d6 c0 D W% }) x, `' y2 P
terone, which is a more potent metabolite, is more
4 ~9 c6 F1 [6 T/ Mactive in young children exposed to testosterone- Y `& j5 r3 H6 L: \8 e9 S: M
exogenously7; however, we did not measure a dihy-
" u2 r# `' c m* ~" w+ Z4 Vdrotestosterone level in our patient. In addition to
+ c0 L) e7 ?5 W* u& `2 _virilization, exposure to exogenous testosterone in4 S+ P Q: ?- z: v; q
children results in an increase in growth velocity and
, C$ \8 w D7 F" U& L7 T: @$ o7 }2 e) oadvanced bone age, as seen in our patient.
% g: n Y* a! i( UThe long-term effect of androgen exposure during
8 W$ O+ }# w1 H% q5 g$ B$ Learly childhood on pubertal development and final, a' p# a* Q" E1 f# ?' v
adult height are not fully known and always remain
' E3 G4 Z6 q- X8 e1 Na concern. Children treated with short-term testos-
. v" I( p+ N, m$ ^0 s- ] D1 yterone injection or topical androgen may exhibit some1 z2 W- N9 s/ a7 ?" g' V; |: E& w. S
acceleration of the skeletal maturation; however, after5 d) ~; }9 {8 t
cessation of treatment, the rate of bone maturation/ Y9 t$ _ x2 S
decelerates and gradually returns to normal.8,9$ Q+ O" ?: R$ ^6 H
There are conflicting reports and controversy: k8 z( f0 d9 @5 w
over the effect of early androgen exposure on adult, w: j/ r' W7 C+ X9 b* i
penile length.10,11 Some reports suggest subnormal) L% I" c7 H; ^9 ], m" P
adult penile length, apparently because of downreg-& M1 v* ^* j% L% X% B: w
ulation of androgen receptor number.10,12 However,
- ]5 I- t' h3 I3 F% R' D6 g6 y, z3 lSutherland et al13 did not find a correlation between
' s9 ]5 }4 x2 dchildhood testosterone exposure and reduced adult! ]; T# p$ D1 l( E$ p% H% y
penile length in clinical studies./ ^2 [3 f) M+ j8 {: r
Nonetheless, we do not believe our patient is+ U$ r8 A3 i) m2 _7 d A$ w2 b
going to experience any of the untoward effects from' Y2 y8 m7 k. ?/ g* M4 j; h
testosterone exposure as mentioned earlier because
N% x( z6 D7 F, k$ v3 M" V- zthe exposure was not for a prolonged period of time.
2 r$ e4 c P$ j) uAlthough the bone age was advanced at the time of% ^6 Q- Q( U$ s7 n
diagnosis, the child had a normal growth velocity at
6 m q& g* G- A: C3 b: bthe follow-up visit. It is hoped that his final adult: l- E1 d1 I4 @* N# d& T" P
height will not be affected.2 v4 |6 R- b2 G" G. P4 \4 C
Although rarely reported, the widespread avail-
5 S4 S( X5 z. z+ Zability of androgen products in our society may$ r. g7 y5 @$ _
indeed cause more virilization in male or female
5 ]" S1 u/ x, N( ^; g2 k- { ?children than one would realize. Exposure to andro-
8 Z& @) A$ b2 d4 _8 r0 w! Qgen products must be considered and specific ques-' d- ]6 d& c% G+ t( g
tioning about the use of a testosterone product or
0 h2 @: ]- ?# V/ d, Y8 ?& Kgel should be asked of the family members during
" N& {; B6 n# I; s3 c; Wthe evaluation of any children who present with vir-
m* F) I) S# _ilization or peripheral precocious puberty. The diag-1 r- r3 p1 i& L! }4 D3 b1 D/ n
nosis can be established by just a few tests and by
+ F4 y: M" W1 B9 tappropriate history. The inability to obtain such a
+ y2 i# k) l$ v8 L. shistory, or failure to ask the specific questions, may' v4 t& o1 J0 n4 k4 z! ~+ t' x
result in extensive, unnecessary, and expensive1 v$ @5 o3 n& f2 h( e3 _, ~
investigation. The primary care physician should be
$ \8 d1 t0 M4 k% `( |6 Haware of this fact, because most of these children
q7 H' _9 @4 n8 `7 W+ Gmay initially present in their practice. The Physicians’' o$ N1 `- b4 D& x3 Q+ K1 ?2 \7 u
Desk Reference and package insert should also put a* a2 o9 c# b) O
warning about the virilizing effect on a male or) [0 O- r: X2 a7 n
female child who might come in contact with some-
$ Q3 e! q; E, q' m3 vone using any of these products./ M7 a, Q( [3 N! z& A
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2002: 565-628.
; G1 k9 w: i. k. c; [2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
2 t& Y. [& w5 W7 E' I/ g( ipuberty in children with tumours of the suprasellar pineal
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1 ]+ S# ], L$ p% ~- b) N2 Y, o/ J3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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Dekker Inc; 2003:211-238.# |9 `) T6 J7 J" A1 o8 Z0 B
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
: }2 V$ W: I T6 [/ o9 B7 Tdevelopment in a two-year-old boy induced by topical
1 O0 ?4 c5 o3 C/ E% A& i% W; t4 texposure to testosterone. Pediatrics. 1999;104:e23.
0 _& j# L5 C' ?2 q3 S; c5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
* C l( v: H6 e- `7 {Skeletal Development of the Hand and Wrist. 2nd ed.$ a* C* G% f, T) i q! a. `
Stanford, CA: Stanford University Press; 1959.
, k0 v$ B/ i5 z0 J: K8 @6. Physicians’ Desk Reference. Androgel 1% testosterone,
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