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is a significant concern for physicians. Central7 C- r! w. L9 u
precocious puberty (CPP), which is mediated2 A' y3 I+ K! B
through the hypothalamic pituitary gonadal axis, has* v2 s0 m6 o( a5 D4 K( D
a higher incidence of organic central nervous system
n5 l ], Y& } m Z3 Dlesions in boys.1,2 Virilization in boys, as manifested- O. {# V% n2 f8 ?- ^$ r
by enlargement of the penis, development of pubic
: d( P9 K0 m* q P9 H8 i% G# N+ dhair, and facial acne without enlargement of testi- C! ]6 b9 Q: j; ]" @/ G; h( C
cles, suggests peripheral or pseudopuberty.1-3 We+ V, K( M) s; B5 l" G
report a 16-month-old boy who presented with the
$ n6 Z5 r1 U' p5 N) J7 |enlargement of the phallus and pubic hair develop-
! O. O0 _& s7 ~; r8 y% l, F2 ^ment without testicular enlargement, which was due& W" b1 A) y# o
to the unintentional exposure to androgen gel used by" F- \5 n Z) @
the father. The family initially concealed this infor-
/ z$ j9 w* A$ Fmation, resulting in an extensive work-up for this+ Q) S( L4 B0 \% Y0 T' T
child. Given the widespread and easy availability of/ B6 y, s( a, g# U0 N0 Q9 c
testosterone gel and cream, we believe this is proba-
' Z% U$ K) v7 f3 u# Bbly more common than the rare case report in the2 t0 y! n1 y: u) A& U' d
literature.4
) G z, M7 x) ^7 u/ t7 l( q8 fPatient Report
3 y9 V- f7 \: `$ t8 U4 n4 nA 16-month-old white child was referred to the
x. `& v2 x/ iendocrine clinic by his pediatrician with the concern
) J) t) R: B! Cof early sexual development. His mother noticed/ D" T# ~3 n+ m4 v/ ?+ j- a
light colored pubic hair development when he was
% a3 g( @! ^$ ~2 f3 B3 i' F. zFrom the 1Division of Pediatric Endocrinology, 2University of! _6 I2 ^9 V( G/ K: S! X+ Z
South Alabama Medical Center, Mobile, Alabama.
. Z f6 T. k' n, c5 k5 i3 X! M* FAddress correspondence to: Samar K. Bhowmick, MD, FACE,
$ Y7 F3 i \) u F( x- A' VProfessor of Pediatrics, University of South Alabama, College of
5 |9 Q! H+ R `. H7 x& G) @ wMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
% k9 Q3 A; R# l) Fe-mail: [email protected].
u+ [7 l. o( p( ]& `about 6 to 7 months old, which progressively became
0 E8 w7 F. H# s! E7 l$ Rdarker. She was also concerned about the enlarge-
2 a9 F* ]& N1 q4 `. J+ [ment of his penis and frequent erections. The child
/ b' q. k+ `( bwas the product of a full-term normal delivery, with
, U1 w% b- I/ j9 N/ ]; G7 ga birth weight of 7 lb 14 oz, and birth length of1 n( u1 e9 _ y4 p; _1 d
20 inches. He was breast-fed throughout the first year! V2 O# y/ j% i% H; o& [2 A- d2 Y
of life and was still receiving breast milk along with
& s) o' @ ^2 ]: v8 J6 X+ Hsolid food. He had no hospitalizations or surgery,
! ]2 Q8 s& v8 R. A2 Hand his psychosocial and psychomotor development. A$ L8 j. s9 ?) G, u3 }8 W5 g, |
was age appropriate.
$ W; w, D6 T* y% Y& |The family history was remarkable for the father, I0 s5 k7 E. O3 s( j l8 q" }
who was diagnosed with hypothyroidism at age 16,: K" U6 d- V; ], A
which was treated with thyroxine. The father’s
- Q6 M- A, q" e1 F$ j+ @height was 6 feet, and he went through a somewhat; h {% Q! W0 t
early puberty and had stopped growing by age 14.! g$ u3 X8 B' e7 J1 z7 k
The father denied taking any other medication. The
$ U8 r2 o6 ?1 [, o# }* {child’s mother was in good health. Her menarche
0 S) i" e2 M. a" Q8 t X/ V& W7 D/ Mwas at 11 years of age, and her height was at 5 feet
/ | y$ N7 ^4 O6 x$ a$ r( _5 inches. There was no other family history of pre-
6 B% }0 N" x# C# Z" `/ b: Ococious sexual development in the first-degree rela-
G4 w& J% }/ j; a5 X0 g( Wtives. There were no siblings.! H! i" Q' d# b0 _0 D- W8 W2 N6 w
Physical Examination" i1 V# o- \6 [. F
The physical examination revealed a very active,5 B# ~( J! z! w3 m; J
playful, and healthy boy. The vital signs documented B: [4 l+ M0 y
a blood pressure of 85/50 mm Hg, his length was
, O( m* E2 }% k/ V90 cm (>97th percentile), and his weight was 14.4 kg
! l: s6 S4 F, C; s, u(also >97th percentile). The observed yearly growth
# t" T1 {, i- M+ w! ?' wvelocity was 30 cm (12 inches). The examination of
: |5 i, g3 }( O1 vthe neck revealed no thyroid enlargement.
7 {3 g3 U" S% p# e" Z& U" k% h! X+ LThe genitourinary examination was remarkable for
* `4 f6 l& s/ z* Denlargement of the penis, with a stretched length of% w' i8 B% a, K3 _
8 cm and a width of 2 cm. The glans penis was very well
3 `% ?0 c( v0 Jdeveloped. The pubic hair was Tanner II, mostly around
8 i4 ^: a" ~3 N3 k* J9 g( ]7 S5406 m* S1 ~5 ~- a- b
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& p6 U' T; e- d3 F. f ^the base of the phallus and was dark and curled. The: o. j) l3 D& M/ `& N3 X
testicular volume was prepubertal at 2 mL each.
5 e; }; G! e- Q5 {The skin was moist and smooth and somewhat
& e- @% D5 b- u2 S( P' d' moily. No axillary hair was noted. There were no
1 c* m0 b( m! k5 ~/ a) Pabnormal skin pigmentations or café-au-lait spots.
% @5 T4 a& k1 uNeurologic evaluation showed deep tendon reflex 2+
: P' v, f/ R( Q* S1 `bilateral and symmetrical. There was no suggestion
( Y0 Z9 h( b- y7 cof papilledema.6 T7 _+ a; V+ J
Laboratory Evaluation7 _9 q. u0 J" x8 h& D3 P' I) u
The bone age was consistent with 28 months by
3 ~9 A$ ~" a! C7 p# J8 ~( susing the standard of Greulich and Pyle at a chrono-
V6 X2 s/ k% Hlogic age of 16 months (advanced).5 Chromosomal
( y7 ^7 H6 n# E( D( K8 Ckaryotype was 46XY. The thyroid function test; X7 j$ Z0 e: A; ^. L0 l
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
! J3 K7 P. r: e8 F5 Rlating hormone level was 1.3 µIU/mL (both normal).
2 K- O: r& a- n+ LThe concentrations of serum electrolytes, blood
, g/ z0 @$ r) [3 eurea nitrogen, creatinine, and calcium all were% w$ `8 _" S$ |
within normal range for his age. The concentration; a1 m) H# Y! f9 f5 `. T9 t; A' X4 }) c
of serum 17-hydroxyprogesterone was 16 ng/dL3 d, Z- F$ Q2 E# G7 O9 W, A3 B
(normal, 3 to 90 ng/dL), androstenedione was 20" x6 s2 D: d6 Q1 f+ @
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-1 U* M1 S' N$ d _1 r1 o
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
& ?5 x7 H2 l+ G( hdesoxycorticosterone was 4.3 ng/dL (normal, 7 to* ]2 y* d: _8 J0 p& x% O1 A# F
49ng/dL), 11-desoxycortisol (specific compound S)
- L. ^" e( X! Zwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-% h. F% \# X8 m$ b! J
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
' |$ Z$ c% Z9 {testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
5 _7 ?7 u) d8 j2 Dand β-human chorionic gonadotropin was less than
: U2 j. t1 O0 Y9 V3 X5 mIU/mL (normal <5 mIU/mL). Serum follicular
+ y, U7 g& {4 G3 s. Sstimulating hormone and leuteinizing hormone
) S3 f, a/ S# K1 z; D$ Fconcentrations were less than 0.05 mIU/mL
6 {- G# p3 ~5 }) C8 j; N(prepubertal).; q+ f w2 U; |6 V* H
The parents were notified about the laboratory
2 g8 L) [5 ?6 s+ P1 a* {: f5 @results and were informed that all of the tests were
) C2 X8 W/ O+ ^$ mnormal except the testosterone level was high. The* B6 c8 K% G5 Z6 x: C& }% C& ^
follow-up visit was arranged within a few weeks to
& g4 C! |( {5 Z. m7 L6 `- B, C. W$ fobtain testicular and abdominal sonograms; how-
# H% g5 r5 E/ Y$ s6 @, Lever, the family did not return for 4 months.3 _+ c# A% s: w" I( ?3 @
Physical examination at this time revealed that the
" W) r6 o. y* Q: dchild had grown 2.5 cm in 4 months and had gained. g6 m8 b# i+ Q7 Z
2 kg of weight. Physical examination remained
0 q: a l: [2 ]# H) g& d9 Hunchanged. Surprisingly, the pubic hair almost com-3 p/ k. F4 [- G7 A) N
pletely disappeared except for a few vellous hairs at
* j& o5 p, t; n$ N8 Ethe base of the phallus. Testicular volume was still 2
; i: H: b1 o8 V7 q* w' G% PmL, and the size of the penis remained unchanged.
' X, R. y- ]" QThe mother also said that the boy was no longer hav-6 ~, X# B3 v0 s8 `1 g) z
ing frequent erections.
7 }8 ?, {, s& Z. |* R/ vBoth parents were again questioned about use of1 M* s _, J" |( T5 Z8 ]
any ointment/creams that they may have applied to. ]) B+ |( E( {" F) W* f! H; c3 i
the child’s skin. This time the father admitted the
# c2 y0 [6 w+ S8 j$ GTopical Testosterone Exposure / Bhowmick et al 541
% O- A6 B J8 D9 X" tuse of testosterone gel twice daily that he was apply-; c3 ^ W- E- R- _
ing over his own shoulders, chest, and back area for4 ~- q2 F: J. n# r g7 }: H) Q
a year. The father also revealed he was embarrassed% n6 j* E5 Z: y0 k" T* `* u
to disclose that he was using a testosterone gel pre-7 K8 |6 t9 I7 ?8 p5 u6 |$ ~1 m: l
scribed by his family physician for decreased libido u( q, ?! c* w8 h" z* t: Q5 j
secondary to depression.
+ [0 s; u# U3 {8 I( i; B3 xThe child slept in the same bed with parents.) q0 H% [4 {8 B( f3 E* Z' k
The father would hug the baby and hold him on his
4 V& E! @8 _5 }( [. J( W2 {" {chest for a considerable period of time, causing sig-/ _+ w4 m6 z" T! @4 K; d& {
nificant bare skin contact between baby and father.1 N7 j' d0 m' G- L. S
The father also admitted that after the phone call,( |+ Q0 p( z7 q& Q# @ ?* y
when he learned the testosterone level in the baby
$ k( d5 G E/ q& v& U+ V& j* bwas high, he then read the product information
) z; ~4 i, c4 Y! ^% r2 e; r( ?7 n5 @) zpacket and concluded that it was most likely the rea-5 G. O/ s( y7 R5 }# e
son for the child’s virilization. At that time, they: L0 Y8 _/ ~$ n6 M! k2 o ^5 b
decided to put the baby in a separate bed, and the, U" F6 W7 l7 F e- l' ^5 ]
father was not hugging him with bare skin and had# L0 \8 Y1 {1 f# L
been using protective clothing. A repeat testosterone
" n* B" o. s, ~9 s9 h3 h0 n1 P8 stest was ordered, but the family did not go to the: \3 e9 o0 E, t3 M! l0 j& `1 ~3 A. O
laboratory to obtain the test.! N J0 d3 T$ q7 |& m$ H4 Z
Discussion' J7 z) x3 j F% p8 Z
Precocious puberty in boys is defined as secondary
( u: _7 M. \; v5 L2 ssexual development before 9 years of age.1,41 K. G5 U( l+ v" z7 e
Precocious puberty is termed as central (true) when0 k2 K+ F! `! B+ `
it is caused by the premature activation of hypo-
6 Q$ g; A( F) [: vthalamic pituitary gonadal axis. CPP is more com-
. a5 q( h7 P% ~! qmon in girls than in boys.1,3 Most boys with CPP
2 r! ^7 X: v' j1 Omay have a central nervous system lesion that is0 n- a* I) P- j, x$ I
responsible for the early activation of the hypothal-
" J7 o ~$ |% u1 J$ ^amic pituitary gonadal axis.1-3 Thus, greater empha-5 Q# e# \: A" [5 A, A
sis has been given to neuroradiologic imaging in
# @$ t, F: ?' M, ]: F/ Z5 _/ T7 ]boys with precocious puberty. In addition to viril-
+ h' P- S3 c" v; J8 Rization, the clinical hallmark of CPP is the symmet-
$ x+ e) F2 i0 {; ~, M* K0 Urical testicular growth secondary to stimulation by
8 R f3 ?& s" Q0 r: L8 z( r( _gonadotropins.1,3
* ^0 ~9 G9 a( D& R8 dGonadotropin-independent peripheral preco-
6 k3 e# f, F `3 q3 k9 s ^' H/ Scious puberty in boys also results from inappropriate# Q e+ Y, [& h: O/ W5 b9 j
androgenic stimulation from either endogenous or
6 G8 z7 n8 k2 a1 n) g7 C; Iexogenous sources, nonpituitary gonadotropin stim-
6 k3 x6 T6 F5 k j2 F0 hulation, and rare activating mutations.3 Virilizing
+ [: w$ o3 f8 t, icongenital adrenal hyperplasia producing excessive9 R% P0 Z) ^+ F8 r, M6 C. X6 [
adrenal androgens is a common cause of precocious% U& @/ Y7 q9 l( u# o
puberty in boys.3,46 P: v! m% ?) s0 g
The most common form of congenital adrenal' ~7 L: Z; O; q0 c) ?& Z
hyperplasia is the 21-hydroxylase enzyme deficiency.
7 K5 f2 S3 m# r- O( X3 lThe 11-β hydroxylase deficiency may also result in* k' f3 L7 W+ d8 \) d* a3 G) `
excessive adrenal androgen production, and rarely,
- _5 W7 I2 x% Z) z* i- @2 ~an adrenal tumor may also cause adrenal androgen
/ C9 Y, i* ?4 F3 h7 mexcess.1,3
- V8 |" a+ Y- e# l& z5 b5 ^. pat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( \$ ?, e) _+ b' |" h0 _
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
5 l) k6 Z- M2 q3 y9 `A unique entity of male-limited gonadotropin-
3 y; m; C% A# p8 j2 @independent precocious puberty, which is also known* y( W7 I. k* k c6 g
as testotoxicosis, may cause precocious puberty at a9 e7 z' @( b% p# n" k+ ~4 n8 j
very young age. The physical findings in these boys/ p( f) D3 a( h! l1 f W5 o
with this disorder are full pubertal development,4 u4 Q/ d1 [0 }
including bilateral testicular growth, similar to boys
( P' Q# V; I# @7 P7 d/ J( dwith CPP. The gonadotropin levels in this disorder
M3 V! q8 y) q! d, a; Uare suppressed to prepubertal levels and do not show. h- U# A3 t' u$ K
pubertal response of gonadotropin after gonadotropin-
" `( X, i* J3 Y, ^ e& Ureleasing hormone stimulation. This is a sex-linked
; e) x8 G% [" @! D; q# l6 n7 X7 x* qautosomal dominant disorder that affects only1 b) Y4 z0 k9 s' O8 P% x: R
males; therefore, other male members of the family3 ~8 y/ {% U& J9 S+ q' g+ A* u! C
may have similar precocious puberty.3; V7 z$ l, b( `4 |+ W4 z6 Z
In our patient, physical examination was incon-- H& q+ k* d& `( g
sistent with true precocious puberty since his testi-
4 U7 ^" A# f p+ \) C0 Rcles were prepubertal in size. However, testotoxicosis t# P' U- \ R2 q' Y% Z7 o& K7 |
was in the differential diagnosis because his father& n _4 E/ f, j1 x5 v# }# U6 x
started puberty somewhat early, and occasionally,
2 o) G$ a# a) [4 i! X" R; ktesticular enlargement is not that evident in the( y; v6 U9 I: j3 V
beginning of this process.1 In the absence of a neg-
% _. y0 d, p- Z' _+ {: i+ `ative initial history of androgen exposure, our, Y$ G( h V! L( s
biggest concern was virilizing adrenal hyperplasia,* d, a8 G1 z t: e
either 21-hydroxylase deficiency or 11-β hydroxylase: J: P# q6 x6 F5 W, `( h
deficiency. Those diagnoses were excluded by find-
; P! |: F/ I8 ting the normal level of adrenal steroids.
0 d) l$ m# S8 ^* IThe diagnosis of exogenous androgens was strongly+ L% s5 J* g, i9 t
suspected in a follow-up visit after 4 months because' f$ y' e2 `2 W- W( o3 p" X
the physical examination revealed the complete disap-- f. e5 v2 p: n6 x# I, I4 L
pearance of pubic hair, normal growth velocity, and
& b/ t1 k: H) Y4 \decreased erections. The father admitted using a testos-8 l/ ^# O- Z/ T; L) F! B
terone gel, which he concealed at first visit. He was
7 V# E8 b. J7 Kusing it rather frequently, twice a day. The Physicians’
9 I, [$ ^3 K1 n8 _1 _Desk Reference, or package insert of this product, gel or! z7 x7 U+ V# D6 F _) B5 k G
cream, cautions about dermal testosterone transfer to
4 T. _0 f- {! L. \1 Tunprotected females through direct skin exposure.
6 \/ ]7 o5 y# L5 kSerum testosterone level was found to be 2 times the
`( q+ S8 e C6 _baseline value in those females who were exposed to" _* g! n$ [) y k( T+ Y
even 15 minutes of direct skin contact with their male/ L* c9 B9 ^: D" d
partners.6 However, when a shirt covered the applica-
* H" d: D( b' W3 Z$ W$ _6 z1 L' Ytion site, this testosterone transfer was prevented.3 Y0 F0 a# E3 g4 _' I6 [
Our patient’s testosterone level was 60 ng/mL,1 J" B4 R, y- B3 g
which was clearly high. Some studies suggest that8 c4 {7 q8 ^7 W( N& u6 u( T9 u( Z
dermal conversion of testosterone to dihydrotestos-& R5 A4 M, s: K
terone, which is a more potent metabolite, is more
, m$ N/ Z. G1 O0 @1 Q& oactive in young children exposed to testosterone; a; e* d7 l0 Q! W) A
exogenously7; however, we did not measure a dihy-
9 L, b$ G ]/ J9 R7 _% W( x, gdrotestosterone level in our patient. In addition to
3 f& E, p p0 V# G: z, O avirilization, exposure to exogenous testosterone in
; o) z/ g+ u* ]9 P& ^; ichildren results in an increase in growth velocity and* t5 i; e1 Z( F$ S, M6 I( n8 h! ^
advanced bone age, as seen in our patient.
- N/ ?5 W- i6 a0 {2 `The long-term effect of androgen exposure during
v8 x/ `( Q; p" G# K/ nearly childhood on pubertal development and final
( M/ h4 T2 V4 i" H# ^1 U1 }adult height are not fully known and always remain C& i3 \5 Z3 o/ f" |
a concern. Children treated with short-term testos-, ]" E! R( ?- g/ M
terone injection or topical androgen may exhibit some0 F) _. Q+ c7 }. v: K
acceleration of the skeletal maturation; however, after" ?& y! r# z6 M. X& u
cessation of treatment, the rate of bone maturation
4 N8 i" B" z; g% Kdecelerates and gradually returns to normal.8,9- t! r# M! t% }
There are conflicting reports and controversy5 @% H" q0 b* m3 J( K) N
over the effect of early androgen exposure on adult
! Z% U+ Q5 M8 S! i$ O: N! ^: j: U9 Upenile length.10,11 Some reports suggest subnormal& W+ {7 O: D- a7 Z3 y
adult penile length, apparently because of downreg-
, q* H$ k8 M; I v9 K1 ]' v0 Iulation of androgen receptor number.10,12 However,/ o" Z) \" x6 X4 ^
Sutherland et al13 did not find a correlation between% t+ [, W9 D5 j3 ]1 F
childhood testosterone exposure and reduced adult# s$ I n8 R' @- A( j8 N$ j2 a
penile length in clinical studies./ P. J$ d: A5 F( ^
Nonetheless, we do not believe our patient is
' [/ [3 k9 T5 U; z; Pgoing to experience any of the untoward effects from4 o: z( A, B5 J+ o$ p! u9 M
testosterone exposure as mentioned earlier because1 I8 N2 d: n4 `4 h; t' I4 Q
the exposure was not for a prolonged period of time.1 `4 a& L: [: ~. E4 i
Although the bone age was advanced at the time of
$ u, ]6 X G4 |# I$ v/ Tdiagnosis, the child had a normal growth velocity at
- E7 f! G0 {. l, c2 M, n1 T1 kthe follow-up visit. It is hoped that his final adult
. v2 Q) l' i7 v6 v7 z6 l: @ J6 Bheight will not be affected.0 D% E. e. R/ k1 k
Although rarely reported, the widespread avail-
) o3 K h5 _( M' ?9 u0 Kability of androgen products in our society may
2 o- e( S' w+ n* B! Kindeed cause more virilization in male or female
6 D# l4 H1 }. r% J: _2 c' s: vchildren than one would realize. Exposure to andro-
+ m$ {' \! H0 h, A- C9 dgen products must be considered and specific ques-
! G& D" a9 |* F" |+ @tioning about the use of a testosterone product or' R' b4 a0 A1 N. M$ |
gel should be asked of the family members during& f9 B2 J) ]; j
the evaluation of any children who present with vir-3 Q8 I) H+ K1 G# e' T" D
ilization or peripheral precocious puberty. The diag-& y9 I' R8 G3 q- C# E* K
nosis can be established by just a few tests and by3 J/ y( U( ?9 q4 x
appropriate history. The inability to obtain such a+ L" \/ D0 s2 t9 u3 u4 t8 N W
history, or failure to ask the specific questions, may
" B+ \4 `3 U: Z$ l8 L, Q) Vresult in extensive, unnecessary, and expensive" J0 {6 o' Y- Y ?8 X0 m/ |4 `
investigation. The primary care physician should be# Y& h1 y `- r( u; U' ?2 \" f
aware of this fact, because most of these children+ i) V; h/ r) c3 p! s% ^; p
may initially present in their practice. The Physicians’
4 B: B$ N& q( V: j2 [' v+ }( e, g. m SDesk Reference and package insert should also put a
# _1 Z1 V/ R: |* U) S7 u; P" bwarning about the virilizing effect on a male or/ f5 m" J/ ?! Z8 |. t
female child who might come in contact with some-/ C% G/ `: ^' A9 q4 l- b
one using any of these products.
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1. Styne DM. The testes: disorder of sexual differentiation
+ I0 Q' E* W( t8 Qand puberty in the male. In: Sperling MA, ed. Pediatric
* T5 P$ ?1 K! w: C& w! xEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
/ Z: J' c( X5 c% M v+ r2002: 565-628.
# t8 j/ |. q/ q+ J2 d2 V2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
{2 y; p! p$ q/ x4 m3 J9 h2 Epuberty in children with tumours of the suprasellar pineal! G1 k* T, y7 l: W( B- u
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# G# Q# \* m+ x/ p: E1 {3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
. `' k. e! g) ]8 J# `Pediatric Endocrinology. 4th ed. New York, NY: Marcel
7 F. Z' i4 L! r' |Dekker Inc; 2003:211-238.
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. A) ?! x3 R E& }- I9 X$ `3 g& I# Hdevelopment in a two-year-old boy induced by topical! ~7 n3 g& ~% |
exposure to testosterone. Pediatrics. 1999;104:e23.
$ j: |9 q6 d' m. A7 c5 x$ v& ]5. Greulich WW, Pyle SI, eds. Radiographic Atlas of% e, k1 `. `' w T' P7 r* P
Skeletal Development of the Hand and Wrist. 2nd ed.& n# S5 f1 Y G( m
Stanford, CA: Stanford University Press; 1959.+ ~' T( a, _9 R( c: U
6. Physicians’ Desk Reference. Androgel 1% testosterone,. x5 V6 Q7 _" V5 O8 j+ s1 j( p
Unimed Pharmaceutical Inc. Montvale, NJ: Medical4 w% O+ D' ~, \5 Y2 ]; b; \8 F' ]
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