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is a significant concern for physicians. Central! Y; B, ?) ?3 V* \
precocious puberty (CPP), which is mediated
) t7 }1 r- `3 `, x* w6 Vthrough the hypothalamic pituitary gonadal axis, has# x5 b& j" k) F' `0 e% q
a higher incidence of organic central nervous system
3 h' d J6 m' L7 ]: o/ h; Nlesions in boys.1,2 Virilization in boys, as manifested
: |. ]* C' N9 V1 y1 n' u/ E9 lby enlargement of the penis, development of pubic" |( R: z! q) m* k# y, \% {
hair, and facial acne without enlargement of testi-3 N1 L1 i5 ~* L+ A5 Y
cles, suggests peripheral or pseudopuberty.1-3 We
. J2 g. Z) F6 \8 \% G; T0 Vreport a 16-month-old boy who presented with the
7 s; M$ D; x& ienlargement of the phallus and pubic hair develop- U7 m8 I5 x S3 L. G: e
ment without testicular enlargement, which was due, z5 J- F; o* T/ W7 f
to the unintentional exposure to androgen gel used by
: U7 N; h4 n F( p \the father. The family initially concealed this infor-! }/ l9 @" g5 Q. M4 t; y `
mation, resulting in an extensive work-up for this$ k! I# C1 m$ R) R
child. Given the widespread and easy availability of
) Y# _9 w) D+ i/ y D |testosterone gel and cream, we believe this is proba-
3 f5 q* T' l; V5 o1 U; obly more common than the rare case report in the! u0 ^ F4 T. d+ } X0 ~
literature.4
1 V$ `5 p& z9 P) d7 j4 m4 [! O$ CPatient Report
: }. ^' U% ~* o/ Y- ^7 s" hA 16-month-old white child was referred to the% [/ d. _# }/ d6 w% ]
endocrine clinic by his pediatrician with the concern
# }0 f8 s Q* |' o6 Z/ K. O/ d. Eof early sexual development. His mother noticed
' g" p& h R3 z( n; ^ s9 h" H( R" x' a$ olight colored pubic hair development when he was
9 D! d7 B. `7 _6 `& Z, J3 J* rFrom the 1Division of Pediatric Endocrinology, 2University of
5 g0 `2 Z/ c- M# K H" K/ f+ DSouth Alabama Medical Center, Mobile, Alabama.$ @, m+ l9 i- L/ Y
Address correspondence to: Samar K. Bhowmick, MD, FACE,
: x& X6 ]9 |: g/ g0 x5 x4 u4 kProfessor of Pediatrics, University of South Alabama, College of1 a& Q" \! C- [, ~) q4 ^
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;% i5 p/ M% ` y
e-mail: [email protected].
' g, x R9 h B# c0 N: @8 s7 W, Oabout 6 to 7 months old, which progressively became& E8 w1 W8 T: T- K
darker. She was also concerned about the enlarge-
) ?* c2 m, {7 k' \' a, O! w9 o; Cment of his penis and frequent erections. The child; h+ x5 ?+ z: {$ s$ k) }1 F) j
was the product of a full-term normal delivery, with
$ l( o+ x: D; o2 g* qa birth weight of 7 lb 14 oz, and birth length of
: Z8 A# K0 X7 n: k20 inches. He was breast-fed throughout the first year# ~3 g7 O7 I$ t# f, K0 Y
of life and was still receiving breast milk along with
, I# I/ B5 R& Wsolid food. He had no hospitalizations or surgery,* i) B5 _# D9 c, ?
and his psychosocial and psychomotor development+ [3 R" |0 f, a! U/ i$ N
was age appropriate.
6 H0 x9 v2 @' `# w2 f9 ?( LThe family history was remarkable for the father,, I1 x) Y# ~% R8 J6 P
who was diagnosed with hypothyroidism at age 16,
- k2 L2 n/ t! C& j- iwhich was treated with thyroxine. The father’s' X/ D( s7 l" A' z: z
height was 6 feet, and he went through a somewhat
; \* _7 }! m8 @/ Uearly puberty and had stopped growing by age 14.9 v* h9 l4 v8 M, h& }4 s
The father denied taking any other medication. The
8 K7 S$ y5 p1 S1 l8 L- dchild’s mother was in good health. Her menarche
4 l+ M8 I& z8 p# _was at 11 years of age, and her height was at 5 feet
0 p& @8 v8 y! O* L/ E, T/ y8 W5 inches. There was no other family history of pre-
# x6 |2 |8 U0 |( K4 d0 Bcocious sexual development in the first-degree rela-# Q; B1 r2 u( B: A& R
tives. There were no siblings.
3 C& P% y7 C8 @Physical Examination
8 O* t9 z; ?+ i, S) ~The physical examination revealed a very active,
0 @8 h8 P7 Z( F1 D7 rplayful, and healthy boy. The vital signs documented
# f3 R8 n6 m) P7 Na blood pressure of 85/50 mm Hg, his length was
% b5 ]- P+ ?" R% }, T! O) [90 cm (>97th percentile), and his weight was 14.4 kg
' _* o w% [7 K$ l, Q T$ P& Z(also >97th percentile). The observed yearly growth
* M' Q0 @2 P" @4 J" Bvelocity was 30 cm (12 inches). The examination of
z" Y/ X* I' X3 L6 N, Uthe neck revealed no thyroid enlargement.
* |3 ` W M4 I1 c4 LThe genitourinary examination was remarkable for& E \0 D# c2 [3 ?2 W- L. A7 j
enlargement of the penis, with a stretched length of1 c9 C& S c/ x, ^# H/ c8 k1 ~) k
8 cm and a width of 2 cm. The glans penis was very well
$ [! r! H& j( m, O: X$ F0 ?. {developed. The pubic hair was Tanner II, mostly around
: @" v# O$ P1 ~+ h9 R$ j0 A3 O540+ p6 h7 b9 h* v7 Z% q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from7 W. ]2 C; {. _: C
the base of the phallus and was dark and curled. The
$ m3 O$ m" {3 z% Atesticular volume was prepubertal at 2 mL each.: S( M+ S% N4 t/ ?; Y
The skin was moist and smooth and somewhat
4 b9 @+ u! P/ Q+ p; Foily. No axillary hair was noted. There were no4 N ]5 X, C6 W9 Q+ p" [
abnormal skin pigmentations or café-au-lait spots.
& q6 p# \# g3 Y8 n' QNeurologic evaluation showed deep tendon reflex 2+
/ A0 g: v) N4 {5 a$ n" n4 hbilateral and symmetrical. There was no suggestion
0 ~( N+ ~- _1 Xof papilledema.) R3 c9 S0 y& D3 c2 Q9 {, b
Laboratory Evaluation2 `5 d A( s8 J- q+ Q' q
The bone age was consistent with 28 months by- ]( \4 _& J, ?
using the standard of Greulich and Pyle at a chrono-
' ?" N2 t4 N8 i+ E5 Hlogic age of 16 months (advanced).5 Chromosomal5 ~; q2 w% S% G3 ]# V9 \
karyotype was 46XY. The thyroid function test5 Y, a% J/ g1 Q4 }, v, j5 N$ q
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
5 V8 _ b0 J- S8 `1 v" nlating hormone level was 1.3 µIU/mL (both normal).
1 v* d/ J# b4 D# f" ZThe concentrations of serum electrolytes, blood
+ r3 ~. F7 f! S2 w/ Furea nitrogen, creatinine, and calcium all were
+ ~( \. A0 y$ J) l& x3 Dwithin normal range for his age. The concentration
# K. E5 w! P# o( Y- V& @# pof serum 17-hydroxyprogesterone was 16 ng/dL
& z, G" S9 V! v(normal, 3 to 90 ng/dL), androstenedione was 20
$ Q6 ~4 k- h6 H3 U; r7 d. rng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-8 Q9 H. v( f v
terone was 38 ng/dL (normal, 50 to 760 ng/dL),: \ c2 b7 _8 @$ N4 A% D$ ]
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
, B4 j, N0 Y( j n# w4 r49ng/dL), 11-desoxycortisol (specific compound S)
; t. ^ A3 D9 Y' n9 @7 s8 owas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
* T, d$ B% K& K1 j& d8 t+ ztisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total+ Z9 m. @) P/ z: X- K
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),( ]; x0 Z6 o" o) y# @! q: `3 i
and β-human chorionic gonadotropin was less than
% X& O: F: q* M0 n5 mIU/mL (normal <5 mIU/mL). Serum follicular
% ]+ M: E b1 U- i- A0 A T/ H- |stimulating hormone and leuteinizing hormone3 k. w- @( r. N5 M3 L& N0 J/ x
concentrations were less than 0.05 mIU/mL
8 l, F7 {, p/ v1 S(prepubertal).' q0 k/ _- O6 p" _+ a+ S
The parents were notified about the laboratory) h7 c W. C% K4 }5 z0 \
results and were informed that all of the tests were% r# ^+ ~# H; t; F
normal except the testosterone level was high. The
! C6 f% Z' e+ ffollow-up visit was arranged within a few weeks to
! u/ H2 I: V4 Aobtain testicular and abdominal sonograms; how-
7 M: g" S+ a4 p: U) Hever, the family did not return for 4 months.
7 ~( [7 h3 q0 E7 pPhysical examination at this time revealed that the
1 s" _( S, e, C. ?; p. ~8 Pchild had grown 2.5 cm in 4 months and had gained
4 j$ u# _' `' n: r2 kg of weight. Physical examination remained
/ r3 K/ K/ H; ]$ P9 u, G9 A" funchanged. Surprisingly, the pubic hair almost com-
- j) \5 A3 D9 n1 V6 H: spletely disappeared except for a few vellous hairs at5 k; C J8 D5 s' j
the base of the phallus. Testicular volume was still 29 z$ G, g8 U0 G f6 ^
mL, and the size of the penis remained unchanged.
, ]8 _% l* I# D4 CThe mother also said that the boy was no longer hav-
$ q) N' X, x+ i" ?: O/ Fing frequent erections.
: F( w# O) p! ]$ f5 x9 M; i2 ~Both parents were again questioned about use of( N" n6 y7 c2 |+ r% d# [2 a6 `' Y
any ointment/creams that they may have applied to# I3 w; S* V: |$ {) K
the child’s skin. This time the father admitted the
1 q* X) x0 N% aTopical Testosterone Exposure / Bhowmick et al 541/ W% [9 i% c& f* d( Z2 }
use of testosterone gel twice daily that he was apply-
y6 a7 [7 A) T( \6 y9 Ting over his own shoulders, chest, and back area for
4 i4 y) t" \+ j( H7 n7 Ra year. The father also revealed he was embarrassed
0 P. V! g* l! b. B* `to disclose that he was using a testosterone gel pre-
5 H! A3 x, z3 k4 H4 a( W9 |- |0 pscribed by his family physician for decreased libido
9 L, p: e. M8 U1 L+ `8 Bsecondary to depression.
! s0 ~* W) Q( T+ zThe child slept in the same bed with parents.
6 k) A5 C1 @, g* p, P' SThe father would hug the baby and hold him on his
2 n& e: l3 d/ H" z- y0 `chest for a considerable period of time, causing sig-- U$ Q; [' D I. _
nificant bare skin contact between baby and father.$ F/ z5 h- k4 Q1 \- T
The father also admitted that after the phone call,( e1 _( O% d8 R* `
when he learned the testosterone level in the baby
2 d6 @! C" ?4 g: \$ _was high, he then read the product information
. t. F6 ]' T& X) q6 V6 Vpacket and concluded that it was most likely the rea- o: @2 w! {" X! e- Z8 X) k
son for the child’s virilization. At that time, they) G a' c7 t! @+ U- P0 b; ?: [0 f
decided to put the baby in a separate bed, and the
4 |( s; ^ f% N0 u3 h6 H& V" Afather was not hugging him with bare skin and had# p' f u" y* |( A, ?6 L G) s, D
been using protective clothing. A repeat testosterone3 w! N+ X: F+ R4 e0 L$ ]
test was ordered, but the family did not go to the- t* o0 k7 e4 r0 M
laboratory to obtain the test.7 x0 Y; Q" m; Y! P
Discussion6 p* Q! _$ w% K
Precocious puberty in boys is defined as secondary
0 y x: F" G6 S5 r2 L. R5 Y" \sexual development before 9 years of age.1,4* y8 y5 y" L" f; D
Precocious puberty is termed as central (true) when) J& Z) t ?! E! y9 ~
it is caused by the premature activation of hypo-$ ] m+ D; r& ]5 K6 E
thalamic pituitary gonadal axis. CPP is more com-! x7 E& S: U9 J- `% F
mon in girls than in boys.1,3 Most boys with CPP
6 }9 a& R. j e( ?7 i! S' Smay have a central nervous system lesion that is
. g. x! _4 |; Iresponsible for the early activation of the hypothal-
/ Z3 n/ P( h) \* B1 {amic pituitary gonadal axis.1-3 Thus, greater empha-% c9 w% M5 Y/ n3 P- M2 c. K
sis has been given to neuroradiologic imaging in
& j! F! \. M$ [9 pboys with precocious puberty. In addition to viril-' D+ d+ [, \& z0 J$ n. }
ization, the clinical hallmark of CPP is the symmet-2 O# P! ^7 o% z. N" _3 G n a
rical testicular growth secondary to stimulation by" g. o" a# \& Y! m B
gonadotropins.1,35 g, n f0 d* ~$ @& C! m$ ]
Gonadotropin-independent peripheral preco-; s" r' `' A5 g. y. ?! ]5 D
cious puberty in boys also results from inappropriate
5 C$ v. K- r0 G* e* yandrogenic stimulation from either endogenous or: x& ~; p/ j- @* p- D
exogenous sources, nonpituitary gonadotropin stim-: {0 Q7 i1 k2 u
ulation, and rare activating mutations.3 Virilizing( T2 [) X- D( ^% m) Q$ i
congenital adrenal hyperplasia producing excessive
T& `4 V6 ]/ Z; dadrenal androgens is a common cause of precocious' N# T; {$ H' R6 Q( G7 L! p
puberty in boys.3,4( m" k! ]; |( d6 D/ W# x4 c1 b E
The most common form of congenital adrenal9 [( G* i5 z, a3 t
hyperplasia is the 21-hydroxylase enzyme deficiency.
: u4 U0 M" t7 i: d1 E, w. C, EThe 11-β hydroxylase deficiency may also result in% C# {# c8 u. s+ Z) y# u9 x
excessive adrenal androgen production, and rarely,
0 C+ f( W# |3 ^an adrenal tumor may also cause adrenal androgen F3 S) Z0 P! Z( w* \8 Y+ E
excess.1,36 O( Y. V: p1 C9 i
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& I: [2 e0 |: I. `7 D- Q542 Clinical Pediatrics / Vol. 46, No. 6, July 2007) E: v) b* p. y9 o
A unique entity of male-limited gonadotropin-
_, L& T0 g5 kindependent precocious puberty, which is also known
: M- B- A8 S9 ~! H9 E- z9 Gas testotoxicosis, may cause precocious puberty at a
7 L: n$ q/ ?+ d4 o, L2 |/ d! `: Pvery young age. The physical findings in these boys
2 r+ L' n# o9 v6 u: \, q2 T* }9 X1 nwith this disorder are full pubertal development,
% [; h3 F6 v0 w& Cincluding bilateral testicular growth, similar to boys
2 I. H2 K% s, H) ]with CPP. The gonadotropin levels in this disorder
0 f, G2 E) q care suppressed to prepubertal levels and do not show. J8 e" @! B( k1 k2 S
pubertal response of gonadotropin after gonadotropin-2 ~. c- @/ o, y0 f' L/ C
releasing hormone stimulation. This is a sex-linked8 o+ Y# r. Y& N: K& A& x9 r+ W
autosomal dominant disorder that affects only
, d! K$ V, i% i; C$ V/ m$ qmales; therefore, other male members of the family0 k$ m$ `* n7 E, w' W
may have similar precocious puberty.3. V/ e* S+ D# n, f
In our patient, physical examination was incon-
* X5 I% l+ {; P+ A" o9 z. Y) y2 ]sistent with true precocious puberty since his testi-/ n9 Z( r% G" q! m7 T0 p3 L
cles were prepubertal in size. However, testotoxicosis
: R$ B; }( a4 V7 _was in the differential diagnosis because his father
* p1 ~! K; |+ Q+ d Pstarted puberty somewhat early, and occasionally,
! S- C% z( U; }8 R# Vtesticular enlargement is not that evident in the. f$ h" }& i% ]/ h& z
beginning of this process.1 In the absence of a neg-. ^$ F' ?" l, W: ^* ~! `
ative initial history of androgen exposure, our
& {$ N, y* L9 O7 Fbiggest concern was virilizing adrenal hyperplasia,
, b0 t# h7 o" R2 k+ Q* {either 21-hydroxylase deficiency or 11-β hydroxylase
; q$ B3 U7 t5 }$ R: rdeficiency. Those diagnoses were excluded by find-
" I$ V* o3 h1 ~$ R0 ding the normal level of adrenal steroids.5 L) g" j0 N- a& E
The diagnosis of exogenous androgens was strongly. w* p( e% k# p
suspected in a follow-up visit after 4 months because* o1 H* u( h- X5 K
the physical examination revealed the complete disap-
; m6 w! W7 Q1 Tpearance of pubic hair, normal growth velocity, and7 O6 g* c7 g( V- b& u/ u( Z( {6 u! k
decreased erections. The father admitted using a testos-5 k2 I6 x4 j. c) e
terone gel, which he concealed at first visit. He was
" a5 {& O' p$ | N/ t' B& n, qusing it rather frequently, twice a day. The Physicians’" c7 r- V; W' O3 W( y% O
Desk Reference, or package insert of this product, gel or
: y/ ?/ J. a. C# a# e! d, lcream, cautions about dermal testosterone transfer to
" u" V0 m( n0 K, F h1 k+ kunprotected females through direct skin exposure.
% L. I/ Q4 q* b h2 B. N! JSerum testosterone level was found to be 2 times the
7 a3 Y V' _# y+ Z# H5 K6 ybaseline value in those females who were exposed to! D V, g* z9 |% ~+ Q" ~1 R. M
even 15 minutes of direct skin contact with their male
5 M# h/ J6 S# X {3 [/ zpartners.6 However, when a shirt covered the applica-* u$ q1 P( P/ F" Z
tion site, this testosterone transfer was prevented. R; c" }" _& j, v
Our patient’s testosterone level was 60 ng/mL,4 d4 K1 c& O+ `9 r( G& l+ O
which was clearly high. Some studies suggest that
2 y) y- H- `6 l8 S2 K4 K4 Tdermal conversion of testosterone to dihydrotestos-, J, K, K2 D+ m$ d/ g" f
terone, which is a more potent metabolite, is more, E" b) J. Z4 N |! h2 } q5 e& p
active in young children exposed to testosterone
% u2 j. E/ J% pexogenously7; however, we did not measure a dihy-
/ B9 y. M; D! |# U8 O% d# S% hdrotestosterone level in our patient. In addition to
5 A+ @8 G: L- Kvirilization, exposure to exogenous testosterone in
; ]* R0 v: c" y4 Z* s; qchildren results in an increase in growth velocity and* `; K# ?4 L) q1 ~4 q
advanced bone age, as seen in our patient.
( r8 y" ^9 |" y, h) ]) q) gThe long-term effect of androgen exposure during8 h5 x- Q' {& W$ l
early childhood on pubertal development and final
5 V8 b2 P7 o& Y0 A6 f# ]adult height are not fully known and always remain
7 e4 K/ Q9 R; Q; M1 K3 m5 aa concern. Children treated with short-term testos-2 u, k' O. i& B
terone injection or topical androgen may exhibit some
( U& [* P( U7 [4 n% e( Vacceleration of the skeletal maturation; however, after% h N" R) `% {! j% A" d- [
cessation of treatment, the rate of bone maturation
5 P# M `! Y8 ?; adecelerates and gradually returns to normal.8,9
5 u* P7 ?5 W& c. YThere are conflicting reports and controversy
! T9 j, a- n1 O3 B; |7 p$ Aover the effect of early androgen exposure on adult2 @7 j. }5 Y# X9 ^
penile length.10,11 Some reports suggest subnormal7 w% Z, r# B" ?( ?7 L( z
adult penile length, apparently because of downreg-, S, s' R, \: y
ulation of androgen receptor number.10,12 However,
- Y- @3 `9 J. H% D1 W' ^) a QSutherland et al13 did not find a correlation between
( S2 u. c# _3 }+ n) u% |4 R$ u$ }childhood testosterone exposure and reduced adult
. a: i- w' G( [6 w1 Ipenile length in clinical studies.6 C. K2 Y/ m9 v6 j# t' E
Nonetheless, we do not believe our patient is
& t8 q" b' Y4 X4 t$ b4 N# x5 t$ O% B# wgoing to experience any of the untoward effects from8 A7 k# O8 S, ]
testosterone exposure as mentioned earlier because
Q! ` M5 k Rthe exposure was not for a prolonged period of time.3 J& ?7 i5 C3 O7 p+ `' {
Although the bone age was advanced at the time of, s" I/ \6 Q) `" m7 [- `5 S9 I, j
diagnosis, the child had a normal growth velocity at
/ Q1 ~- i8 x; N5 b+ L- A8 ]* t4 Kthe follow-up visit. It is hoped that his final adult
+ [6 e N1 Z. I9 Theight will not be affected.8 J+ l, V0 _) f" u: c& f& M; M
Although rarely reported, the widespread avail-: \8 B( T* x% d% G5 W
ability of androgen products in our society may
8 I- j" ]: c, y( A* Q( mindeed cause more virilization in male or female
& c/ i, S% F4 u8 o8 N% hchildren than one would realize. Exposure to andro-
& J" n5 t# m( _, I$ K) }gen products must be considered and specific ques-& d& u" Z; U( p G4 @7 m0 ]
tioning about the use of a testosterone product or- w8 w1 F# v* U; i. E! |
gel should be asked of the family members during0 z8 ^& n# a1 F. I' O
the evaluation of any children who present with vir-- h& e3 u0 J! ^8 }$ X" e0 i) m
ilization or peripheral precocious puberty. The diag-% o$ ]: L; T9 n- B- `5 E1 H" p( U) Y% d
nosis can be established by just a few tests and by
! S5 c8 w4 U% c9 f9 A% ?appropriate history. The inability to obtain such a' T% }5 H, a+ x& h9 _7 _
history, or failure to ask the specific questions, may
1 P" o ~; ^/ E, lresult in extensive, unnecessary, and expensive
4 a0 G) |* F: w: K9 c9 zinvestigation. The primary care physician should be
0 `5 L: B2 `/ L3 M/ | ?' `& qaware of this fact, because most of these children9 i' f2 s9 w4 x6 s4 D
may initially present in their practice. The Physicians’8 B- h b, m+ s1 ^8 k& u
Desk Reference and package insert should also put a5 `" Y/ ~0 t: |$ h2 k7 a. O
warning about the virilizing effect on a male or. d, \ d c. i; y. u, s! e1 y
female child who might come in contact with some-( u- [( _$ i% P1 M' x, d4 [" F$ V$ ?) @
one using any of these products.
2 H7 ?; P3 P! F! x) T- v1 o; gReferences
$ _4 Z" Q- O0 h. }8 A) k% `1. Styne DM. The testes: disorder of sexual differentiation
" w" a' j: O; i8 Xand puberty in the male. In: Sperling MA, ed. Pediatric: \: M- V2 q% C8 j! i( w
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;8 D, y8 W3 N# d9 a6 j+ F
2002: 565-628.( D {" `/ R3 ~: q& I
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious% E2 \( L& U' p- Q4 c
puberty in children with tumours of the suprasellar pineal( V4 Q5 q% |. U, j
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" V' ]3 `5 |! l A, q- l9 k4 \Topical Testosterone Exposure / Bhowmick et al 543
' B9 i# Z* o2 {areas: organic central precocious puberty. Acta Paediatr.) e5 C; ^; J, [( E) x
2001;90:751-756.! A. j7 B2 F: g: c+ o1 y
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.( w1 P# E( P. b3 h
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
3 D2 G2 F# m' U% `7 vDekker Inc; 2003:211-238.1 ]( F/ S% [# g- x
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
: s( e: w0 B+ B# udevelopment in a two-year-old boy induced by topical
* a# B) v8 e/ R. Nexposure to testosterone. Pediatrics. 1999;104:e23.
, y0 a) q4 V: R: o+ A5. Greulich WW, Pyle SI, eds. Radiographic Atlas of) e3 k: M/ k3 N
Skeletal Development of the Hand and Wrist. 2nd ed.& |1 U% i7 U* D2 E: u
Stanford, CA: Stanford University Press; 1959.$ v. l4 J- X& _+ J2 C, S
6. Physicians’ Desk Reference. Androgel 1% testosterone," C5 @ F' N7 ]: a' a
Unimed Pharmaceutical Inc. Montvale, NJ: Medical: F$ p3 n3 z; z( t+ B
Economics Company, Inc; 2004:3239-3241.7 \4 c: ]3 K" F& u) l; [
7. Klugo RC, Cerny JC. Response of micropenis to topical
. e0 D( |5 m6 utestosterone and gonadotropin. J Urol. 1978;119:
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