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is a significant concern for physicians. Central$ s0 X. \: n3 N3 Z. T2 E
precocious puberty (CPP), which is mediated
2 j6 E( Q7 l" e# X! A" V. t. Rthrough the hypothalamic pituitary gonadal axis, has% B- j2 s8 o4 N" o! i! H
a higher incidence of organic central nervous system! c5 Y2 U/ D% d# v/ r- J
lesions in boys.1,2 Virilization in boys, as manifested
. t: m C. C6 T2 n7 ?: oby enlargement of the penis, development of pubic Q# D4 t% Q2 a
hair, and facial acne without enlargement of testi-
2 m0 U. P/ _+ s2 I( Q8 fcles, suggests peripheral or pseudopuberty.1-3 We6 u% v |5 {9 }
report a 16-month-old boy who presented with the, R, A$ w2 u( A1 |
enlargement of the phallus and pubic hair develop-
! a9 c3 s) S2 ~% W, [ gment without testicular enlargement, which was due7 H c4 ~+ y4 U; `/ b0 I
to the unintentional exposure to androgen gel used by5 y8 H# A* W" k2 t: M2 B$ |$ E
the father. The family initially concealed this infor-
, w& e+ i# e5 P! X; N) W! P. |) amation, resulting in an extensive work-up for this8 Q$ {% G& D, i1 p! t9 y
child. Given the widespread and easy availability of0 A8 @6 \7 y( ?, J
testosterone gel and cream, we believe this is proba-; l* c7 [1 `, c: I
bly more common than the rare case report in the
& E% q1 t) ^" I9 Z7 w! F2 {+ }literature.40 ~* A# g3 F8 {) W
Patient Report7 \* K) R7 b3 W) w
A 16-month-old white child was referred to the
7 L- F, y/ [! O# l1 c5 |# Aendocrine clinic by his pediatrician with the concern
) r# M4 j6 M' j5 {, i1 Y; iof early sexual development. His mother noticed W+ g8 c z1 ^. N# C
light colored pubic hair development when he was/ Z& h- ?) }/ e/ v
From the 1Division of Pediatric Endocrinology, 2University of; ^; e, h: ?' A5 P( o$ n
South Alabama Medical Center, Mobile, Alabama.
, {3 N* }# H+ _. q2 YAddress correspondence to: Samar K. Bhowmick, MD, FACE,
! |+ Z" Z9 B5 I; y& j" TProfessor of Pediatrics, University of South Alabama, College of; z5 c' c# P1 o
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;* i6 _ S7 k% n6 Q; E
e-mail: [email protected].6 r, y7 z% k4 }6 r; p% M F
about 6 to 7 months old, which progressively became
# H. T: U+ Z2 q4 Z/ k! w3 i6 i# `darker. She was also concerned about the enlarge-% Y4 g4 P" I; H* `+ _2 d. G; K3 X3 ]
ment of his penis and frequent erections. The child! O; @+ N6 @0 [3 ]+ L# q/ |
was the product of a full-term normal delivery, with
* {! [4 d/ h2 U' K+ b8 g% a/ z& Ea birth weight of 7 lb 14 oz, and birth length of
* ?5 f c+ _. i9 m- `$ }# Y0 Z20 inches. He was breast-fed throughout the first year
" V) l+ p9 O- T: I& qof life and was still receiving breast milk along with
$ `9 {5 S o8 n; v3 i, F% X7 @/ b2 Isolid food. He had no hospitalizations or surgery,! s9 [0 ?/ ?- D8 H$ i) e
and his psychosocial and psychomotor development' x9 U q7 h# H- [4 e
was age appropriate.
. o4 G. L& G9 v+ e7 w% @The family history was remarkable for the father,
8 r; [& B/ Y0 w6 D' e1 t' d2 Z9 Xwho was diagnosed with hypothyroidism at age 16,6 y1 P" e" X/ X& V T2 J2 n& p
which was treated with thyroxine. The father’s* W3 ~* ~* S, t: a9 @. L% X- e& m4 Z
height was 6 feet, and he went through a somewhat+ C! U6 x. ~2 e, ]( `' I
early puberty and had stopped growing by age 14.
) w! `8 F, D0 JThe father denied taking any other medication. The' A4 I- r! a6 j1 o. q A
child’s mother was in good health. Her menarche- p0 c$ v, \0 M9 y
was at 11 years of age, and her height was at 5 feet
; V$ @* t+ |9 n0 p0 k4 W, u5 inches. There was no other family history of pre-: Z' m' z+ u0 s: d/ V4 [
cocious sexual development in the first-degree rela-$ [( B7 T' z6 l; [
tives. There were no siblings.( \ V! P4 x; h
Physical Examination
: Y) f- L) c- pThe physical examination revealed a very active,: \, C3 S) i( e/ S" U' \; C4 Q+ B
playful, and healthy boy. The vital signs documented& a! V* W8 w+ o8 j: }4 w8 O
a blood pressure of 85/50 mm Hg, his length was$ \. H% k/ I+ p$ G7 W3 X5 o7 \
90 cm (>97th percentile), and his weight was 14.4 kg0 g7 @' p" @9 b( ?* x! m
(also >97th percentile). The observed yearly growth& F2 Z4 d3 e% h
velocity was 30 cm (12 inches). The examination of0 C1 U" s: \4 A. A1 ]6 {
the neck revealed no thyroid enlargement.
2 t$ g& ^, [; B' U* W# W- {The genitourinary examination was remarkable for
/ @; w, I" ^9 z/ _) Qenlargement of the penis, with a stretched length of. Q5 O& y1 L. P' F
8 cm and a width of 2 cm. The glans penis was very well# L( X7 T0 ~; B+ M
developed. The pubic hair was Tanner II, mostly around/ J& J& r9 k' j1 O3 }: J
540- w5 t& ?$ p$ ^+ s( a
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 v( |( L9 b# t' ]2 t7 b, U6 d
the base of the phallus and was dark and curled. The6 ?# w0 m* H# f. Q6 i, i4 Z
testicular volume was prepubertal at 2 mL each.4 q3 C4 F! `6 l/ n7 `( J
The skin was moist and smooth and somewhat
k: Q( I- T5 I8 {- `oily. No axillary hair was noted. There were no' i. P N8 ^# A5 o! m6 o7 r
abnormal skin pigmentations or café-au-lait spots.1 q# b: h# z% W6 x. o6 Q% w
Neurologic evaluation showed deep tendon reflex 2+
- l J+ M9 T0 r, a; l# Nbilateral and symmetrical. There was no suggestion+ B, F' x: W8 N) v/ \0 r
of papilledema.
{. ]4 x. n# v4 L/ S# HLaboratory Evaluation
! @+ ~) M9 j8 b2 ~2 H" cThe bone age was consistent with 28 months by
! R2 F; G4 S$ b# Z- ^3 v+ |+ Jusing the standard of Greulich and Pyle at a chrono-
* I% c. M& ]. ]7 O, C& Elogic age of 16 months (advanced).5 Chromosomal: l _7 @1 u! K5 i; r/ M6 a
karyotype was 46XY. The thyroid function test
) I/ H( F" F( O/ w0 Ushowed a free T4 of 1.69 ng/dL, and thyroid stimu-
+ r0 ]; X4 F0 Glating hormone level was 1.3 µIU/mL (both normal).
! Y2 e8 J9 Y" ]1 R2 AThe concentrations of serum electrolytes, blood
6 y E! N" j: O" Jurea nitrogen, creatinine, and calcium all were; p+ ~* p9 n8 C/ f7 }* ~5 H
within normal range for his age. The concentration' Q4 r ~8 x. [/ }6 W t
of serum 17-hydroxyprogesterone was 16 ng/dL1 c: b$ o1 D$ D4 r0 j
(normal, 3 to 90 ng/dL), androstenedione was 20
6 k7 r' t& I/ M1 V1 vng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-7 W) t) t) \) M( r1 I! z# |
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
% E) T/ h9 { U& k; X( O& I7 Udesoxycorticosterone was 4.3 ng/dL (normal, 7 to+ w; a0 e* A7 O. S7 k% u) Y; [
49ng/dL), 11-desoxycortisol (specific compound S)+ r6 j# G: \. t- Q
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-5 v4 B6 q6 F# z& |
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
/ ?; t# Q. q1 Itestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
5 |! d/ _% t9 i1 O% g( D, ~and β-human chorionic gonadotropin was less than) v- R$ F( ^2 \3 j
5 mIU/mL (normal <5 mIU/mL). Serum follicular
3 T0 Q( T+ Z. t; t+ w3 istimulating hormone and leuteinizing hormone
8 ~% ~: \, O6 l+ d% |) i" [/ j& Vconcentrations were less than 0.05 mIU/mL
; X1 L x3 N# w0 T(prepubertal).
% p! j+ S. H- t; u# G8 CThe parents were notified about the laboratory
8 d2 M1 b3 B8 q/ _$ A9 y2 l+ q4 w# Kresults and were informed that all of the tests were! o0 I# J* W. C# F6 z
normal except the testosterone level was high. The
5 L6 \: G0 s) b/ b- o4 jfollow-up visit was arranged within a few weeks to E. n6 B2 H1 @% U
obtain testicular and abdominal sonograms; how-% V- `/ \0 h, E! I
ever, the family did not return for 4 months.
# A' Q, G3 _ `! @& e, UPhysical examination at this time revealed that the
2 F, D* X% j+ d' pchild had grown 2.5 cm in 4 months and had gained. f s" h: Y, \% B1 w/ x0 @
2 kg of weight. Physical examination remained, ]$ N8 O, |; B+ W; L- u/ [
unchanged. Surprisingly, the pubic hair almost com-
. T/ Q9 c8 G! I6 u$ spletely disappeared except for a few vellous hairs at
9 e, i- c( A3 ]" \- jthe base of the phallus. Testicular volume was still 26 h. v2 j- J4 e! {0 i' j( ]. _# T
mL, and the size of the penis remained unchanged.2 |" o! F# Q& Z2 o
The mother also said that the boy was no longer hav-" P$ f# p7 T8 f' J- F+ H& E+ p
ing frequent erections.
' A/ C# U9 T% u/ b/ h; FBoth parents were again questioned about use of+ {6 j8 O& B0 A; I j7 }( M
any ointment/creams that they may have applied to* [1 K e7 ~1 i- d
the child’s skin. This time the father admitted the
( ]* H! i6 l+ ATopical Testosterone Exposure / Bhowmick et al 541
; K3 o( |7 o+ j& ~use of testosterone gel twice daily that he was apply-
4 ?7 f/ W7 S. u0 ]" G; cing over his own shoulders, chest, and back area for
$ r, f/ J- {+ r) }3 q7 ~5 e0 q9 Sa year. The father also revealed he was embarrassed
5 I% {# w, \; l) @! ^# ]* Xto disclose that he was using a testosterone gel pre-
@4 k5 o; h) N% Z' M9 r: V" Dscribed by his family physician for decreased libido, S' k7 V5 M4 r' |/ N7 T
secondary to depression.' D. |4 {2 h3 J7 \# R
The child slept in the same bed with parents.
/ k( g5 @; |! ZThe father would hug the baby and hold him on his# b4 H" f* X _0 O1 b% K2 F) K
chest for a considerable period of time, causing sig-
& ]# c$ ?8 j3 V4 r% e9 ]0 e& ?0 j. Gnificant bare skin contact between baby and father.
. Y/ ?4 D- A% m: l( ^The father also admitted that after the phone call,
$ q7 ]" j& [1 X* n9 Iwhen he learned the testosterone level in the baby
, y- G' f) R/ w/ ywas high, he then read the product information
3 Q, i- l M5 j5 v& Y7 Npacket and concluded that it was most likely the rea-2 x. K4 |/ l4 l9 j1 `
son for the child’s virilization. At that time, they/ D+ o% O9 C# M+ ]9 Q' C
decided to put the baby in a separate bed, and the
- n$ Q" l# b/ B' efather was not hugging him with bare skin and had
+ Z$ R$ x/ a0 N1 ~' `& Jbeen using protective clothing. A repeat testosterone B7 a% J- r6 _/ Q) C/ W
test was ordered, but the family did not go to the- s& \3 R: {) r( M( f
laboratory to obtain the test.
. s$ u. j0 Z0 v; j$ f. F! x eDiscussion
8 m6 V+ G. L4 tPrecocious puberty in boys is defined as secondary& ?! r; r; W7 R# H( w+ \8 W$ H
sexual development before 9 years of age.1,41 H" t* F5 _$ y q3 r
Precocious puberty is termed as central (true) when
3 r6 l1 g, y- Q3 j0 e) Y$ Lit is caused by the premature activation of hypo-7 u7 T1 ?( B2 d
thalamic pituitary gonadal axis. CPP is more com-
% X9 d# r2 G# F, e# b- Mmon in girls than in boys.1,3 Most boys with CPP
) [/ m e1 g- Qmay have a central nervous system lesion that is
& W6 l' T2 f( ^; T9 ~% tresponsible for the early activation of the hypothal-
8 E0 w9 g; B( g" e# Aamic pituitary gonadal axis.1-3 Thus, greater empha-9 ^& ]! k( W# j- @
sis has been given to neuroradiologic imaging in4 X1 |6 R# Q' h+ E' ?6 ]6 `& t9 ]
boys with precocious puberty. In addition to viril-
5 T/ o3 \: _8 v" H; \& p9 p; yization, the clinical hallmark of CPP is the symmet-
# p8 `0 n7 L! L5 A; T. Xrical testicular growth secondary to stimulation by {5 m7 m6 Q: _6 Z5 O
gonadotropins.1,3
. b& p) x7 ]! V( q& T1 [Gonadotropin-independent peripheral preco-
( z* [6 W! @; _cious puberty in boys also results from inappropriate
P; O [$ G+ e; O' _androgenic stimulation from either endogenous or7 c- u! N" X( _" h6 f1 X; G7 M2 Q
exogenous sources, nonpituitary gonadotropin stim-
' ~% y5 N9 s# X% ~- d6 b. W) T& nulation, and rare activating mutations.3 Virilizing
$ \ j. b" x$ q S6 s& j6 gcongenital adrenal hyperplasia producing excessive( p1 b. `5 O9 J4 J
adrenal androgens is a common cause of precocious" A! m4 _# q, [% @0 G+ H( _
puberty in boys.3,43 Y: O# S/ q* e3 X' R
The most common form of congenital adrenal1 n8 P z0 K$ \' `" m5 O; T, I
hyperplasia is the 21-hydroxylase enzyme deficiency.
3 P% H5 R1 R3 k. O; fThe 11-β hydroxylase deficiency may also result in$ M* r/ t- U2 x ~2 }$ B5 c2 U: Q" J
excessive adrenal androgen production, and rarely,& F, k7 I3 R$ J( w; P$ _. A
an adrenal tumor may also cause adrenal androgen8 z! _; d( H1 c% u
excess.1,38 y2 ~: ?6 F: S8 f5 j" z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" {; J: \1 B4 @/ N
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007* x- b5 i) O4 \ k; ^
A unique entity of male-limited gonadotropin-
9 b) [. I A9 Lindependent precocious puberty, which is also known
! _- E& ^6 U/ o2 H4 ]/ X9 P8 v/ das testotoxicosis, may cause precocious puberty at a1 {& d$ d4 `6 M- t4 _- }
very young age. The physical findings in these boys
) p$ V$ x: d: H7 Jwith this disorder are full pubertal development,
8 h1 ^; v( {5 h7 m, a/ Oincluding bilateral testicular growth, similar to boys5 e+ |9 Q3 Y- a5 ]# s* Y+ @; _4 q
with CPP. The gonadotropin levels in this disorder, ^- ]5 v) N; n3 p0 ~7 b4 y# ^4 P
are suppressed to prepubertal levels and do not show1 `. r/ `8 \( r$ Y. g
pubertal response of gonadotropin after gonadotropin-% r2 M$ ^. W) }
releasing hormone stimulation. This is a sex-linked' a6 s* d2 y5 I( L3 \
autosomal dominant disorder that affects only# y: \5 ^- S8 [% s* T. ~; |$ S) \
males; therefore, other male members of the family
) X) Z% ~1 \* U# Tmay have similar precocious puberty.3
' ^" {( A' c% B' b+ S: {In our patient, physical examination was incon-
- P0 s+ o" O N$ Ysistent with true precocious puberty since his testi-3 z" z! y! \1 k7 d( r. Z
cles were prepubertal in size. However, testotoxicosis
9 T( `8 A9 I$ S6 N% Pwas in the differential diagnosis because his father- w6 K& ^$ y2 x1 S! Z+ [* ^
started puberty somewhat early, and occasionally," Z" B8 x1 A3 c* q( R! H
testicular enlargement is not that evident in the
0 w4 S" o3 S9 ~beginning of this process.1 In the absence of a neg-& B ]* V5 O, A4 u( o* t9 C
ative initial history of androgen exposure, our
5 z9 z5 j( W! Z1 H, D9 Mbiggest concern was virilizing adrenal hyperplasia,
' n4 o1 I0 J0 z* L* o* O/ l( deither 21-hydroxylase deficiency or 11-β hydroxylase( {% z1 X5 z I& o& h; N D
deficiency. Those diagnoses were excluded by find-
$ ?" \8 r; D0 D& A- Ding the normal level of adrenal steroids.& ?; X( [. N% i1 g7 t6 x1 H4 O/ ^
The diagnosis of exogenous androgens was strongly
8 q; u* B& z% B j) @% `suspected in a follow-up visit after 4 months because
( N; b0 G* S0 }' j# Jthe physical examination revealed the complete disap-6 m- Q2 R5 a0 `/ O& |# P# n$ A
pearance of pubic hair, normal growth velocity, and% K# o: s' h: r9 U3 u+ w
decreased erections. The father admitted using a testos-
4 p0 i+ v1 F+ y9 s( K- i$ |terone gel, which he concealed at first visit. He was% J q- _! j# G. s8 j; w) e
using it rather frequently, twice a day. The Physicians’
2 n; `( t1 c: ]1 S3 P. dDesk Reference, or package insert of this product, gel or
8 u5 Q8 l z" ccream, cautions about dermal testosterone transfer to v, H$ p0 j! }! c% p
unprotected females through direct skin exposure." {) |+ [2 g! c/ q: D0 \! K
Serum testosterone level was found to be 2 times the' Y6 M, d P8 g- O
baseline value in those females who were exposed to$ t+ {. q$ v* W$ B; A
even 15 minutes of direct skin contact with their male% l# y; W$ l. q7 l! K
partners.6 However, when a shirt covered the applica-
2 ~- \# W6 D1 M. Ltion site, this testosterone transfer was prevented.# U6 u4 k1 ^- n# J& V$ l
Our patient’s testosterone level was 60 ng/mL,
~- `9 N% x: ?" V2 I, pwhich was clearly high. Some studies suggest that" U5 _. R$ v5 h$ w; K& @1 E
dermal conversion of testosterone to dihydrotestos-
' W7 G3 P5 |: [0 \terone, which is a more potent metabolite, is more
* W7 b* ?" A( H, t [. eactive in young children exposed to testosterone
/ w1 k" E9 g- r3 a6 y' b' \3 aexogenously7; however, we did not measure a dihy-
, S- [( S. W/ f5 Zdrotestosterone level in our patient. In addition to
- a- |) ~+ M3 G) e9 svirilization, exposure to exogenous testosterone in3 v2 n& V. C1 _' |$ D
children results in an increase in growth velocity and
: m8 A8 i2 z. {/ s% Hadvanced bone age, as seen in our patient. e. |9 s; M3 J2 t9 A
The long-term effect of androgen exposure during
8 \- x& p( O |* pearly childhood on pubertal development and final
- d5 B/ Z; Z7 m. cadult height are not fully known and always remain! C' u; h, C( [9 E
a concern. Children treated with short-term testos-
. Z# l: g0 \# O% t% U6 Q4 pterone injection or topical androgen may exhibit some0 V# D! s8 z$ T& U: h/ e
acceleration of the skeletal maturation; however, after2 n* f e! e6 d. x0 [
cessation of treatment, the rate of bone maturation% V+ b& W% t( H: v) {
decelerates and gradually returns to normal.8,95 m: p2 X! k* H6 Z
There are conflicting reports and controversy" p. z0 p1 [1 [1 _& C( p
over the effect of early androgen exposure on adult4 o% P) e. I3 R. M' M; h$ B
penile length.10,11 Some reports suggest subnormal, a, C# k9 {) B" Y
adult penile length, apparently because of downreg-
0 \7 y$ j' L6 Z: F- hulation of androgen receptor number.10,12 However,
$ P7 J8 R, g0 t2 S8 CSutherland et al13 did not find a correlation between
/ x! {/ t2 N) ~4 j1 V9 F* ychildhood testosterone exposure and reduced adult
4 @. s/ c5 v8 t! C$ ipenile length in clinical studies.( f& s8 Y9 ^. ^2 `4 p
Nonetheless, we do not believe our patient is
: n* q+ m: S& p% i. e; Q9 Ygoing to experience any of the untoward effects from
" a/ ?6 v( m) E" M- Ptestosterone exposure as mentioned earlier because# W' W: P. F& C
the exposure was not for a prolonged period of time.( w, f* B, V/ S
Although the bone age was advanced at the time of( ?& x* G+ Z" l6 R8 t# H$ D
diagnosis, the child had a normal growth velocity at: i/ ?, B u1 o3 `3 I' M% v' l
the follow-up visit. It is hoped that his final adult
% N% Y/ y5 ~4 a# F8 t$ t& ~4 M& |height will not be affected.$ ^4 H ]' E9 W
Although rarely reported, the widespread avail-
% i; U5 w/ ?7 oability of androgen products in our society may7 Y' ?1 u% t. K" B7 k/ u! K6 X, p
indeed cause more virilization in male or female
* I; q! I/ M& a: ychildren than one would realize. Exposure to andro-9 _ [% }" i) n( J! J4 I: [2 l$ s6 N
gen products must be considered and specific ques-- X6 c' p; u f& p; E
tioning about the use of a testosterone product or
& w7 e) ]# J$ b# ?2 B2 O/ cgel should be asked of the family members during
+ W# O) H) W+ }6 H; `* othe evaluation of any children who present with vir-
+ x& p4 I3 [5 g7 t% h; ?ilization or peripheral precocious puberty. The diag-
8 a* n; r" I( ]# Jnosis can be established by just a few tests and by
* I9 x9 m0 @; A+ Z% eappropriate history. The inability to obtain such a2 ~" X2 x$ @7 u7 \9 M! ]
history, or failure to ask the specific questions, may
0 o/ Y% M" Q- X) Dresult in extensive, unnecessary, and expensive
. H1 Z: J# v. R4 G9 i7 \3 ^ rinvestigation. The primary care physician should be
. @) s. |& J# raware of this fact, because most of these children; m* @- Q$ g: }' g$ p, U
may initially present in their practice. The Physicians’
( ^: h' O, h: X5 ~0 J0 ~! B( TDesk Reference and package insert should also put a
1 t+ j8 m* f, F3 }; \, y+ g! Uwarning about the virilizing effect on a male or; E! i/ a' b1 n+ |) h
female child who might come in contact with some-
- Z3 b4 F5 A# ?one using any of these products.
8 w- S( V* r- XReferences& a1 L! _/ j4 R: i0 G7 ^3 O1 m
1. Styne DM. The testes: disorder of sexual differentiation, n+ |9 Y0 B# u3 ?
and puberty in the male. In: Sperling MA, ed. Pediatric; j9 r1 v8 N" G$ _1 T4 {& F
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;, x+ [* q& [4 j, L) T! g
2002: 565-628.
3 D3 a# s( d! i# ]2 O2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious2 f- T3 E& \, t3 u, B3 }" ~
puberty in children with tumours of the suprasellar pineal
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3 ?. ~5 C8 s2 d, J/ G! D2001;90:751-756.: w+ V- b0 u5 [9 q5 n, s3 {, C
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.' e* R8 Y" h" y
Pediatric Endocrinology. 4th ed. New York, NY: Marcel! X) I" _: ~7 R$ C0 \
Dekker Inc; 2003:211-238.
8 q' l4 O* c5 \3 E i8 d7 y: L4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
' [9 H3 }9 B7 P, w7 X- }9 Z! n+ Ldevelopment in a two-year-old boy induced by topical
6 I& h; M7 U* Uexposure to testosterone. Pediatrics. 1999;104:e23.
" I+ x) l; L) r/ Q/ O6 b5. Greulich WW, Pyle SI, eds. Radiographic Atlas of) G& a P% \* N9 a7 p+ ^9 e
Skeletal Development of the Hand and Wrist. 2nd ed.
0 a- W( W5 }9 s' N) I+ hStanford, CA: Stanford University Press; 1959.
6 K* E+ M; @' i2 S6. Physicians’ Desk Reference. Androgel 1% testosterone, m/ @0 C% @& r4 M; F- i) i7 @
Unimed Pharmaceutical Inc. Montvale, NJ: Medical( g5 W2 T" A; p" O8 l
Economics Company, Inc; 2004:3239-3241.% Z* v7 k _4 I( @4 B% i8 Z" S
7. Klugo RC, Cerny JC. Response of micropenis to topical
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