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is a significant concern for physicians. Central
' u; L2 J: [+ K |" o% ^7 [precocious puberty (CPP), which is mediated
, [( e5 {) a" H; \7 _! {6 E) D& Y6 Pthrough the hypothalamic pituitary gonadal axis, has# {4 r4 L1 l( ]" m! a
a higher incidence of organic central nervous system& r. o$ M) W( v7 P8 @) A( w
lesions in boys.1,2 Virilization in boys, as manifested
+ }6 h) E2 l5 F! ^$ hby enlargement of the penis, development of pubic
8 T1 ]" m+ Y1 V, [: qhair, and facial acne without enlargement of testi-$ @3 O- l$ t2 }+ m; P
cles, suggests peripheral or pseudopuberty.1-3 We
: ^7 G' m1 o8 j6 breport a 16-month-old boy who presented with the
7 _- u5 h: D( O; B5 F5 o! Jenlargement of the phallus and pubic hair develop-8 r }6 i+ f3 H5 a
ment without testicular enlargement, which was due6 C2 q) f: {8 x% I6 e' J
to the unintentional exposure to androgen gel used by2 b. u. a+ J& d. S. R3 v
the father. The family initially concealed this infor-
' c+ i9 }7 I. w5 Y$ L Y! bmation, resulting in an extensive work-up for this
6 x+ L3 D0 Z; A/ Y# p" \child. Given the widespread and easy availability of
" i& ] u, E; P! n Q ~6 o% |( `testosterone gel and cream, we believe this is proba-
7 N! Q' r! v' n" xbly more common than the rare case report in the" j/ S* v. @) z2 I' D" {
literature.4 W8 w" d c9 N! i% k
Patient Report: r, y7 O2 p; D" u7 ?
A 16-month-old white child was referred to the
+ z) a: E5 f7 T. |$ M) hendocrine clinic by his pediatrician with the concern9 j8 n# E1 j2 T0 c8 _! c( q
of early sexual development. His mother noticed
2 h+ @6 ?: F8 J6 W5 P$ Ulight colored pubic hair development when he was
# p' v/ i6 W. t# `From the 1Division of Pediatric Endocrinology, 2University of
& B1 [/ l/ m& }7 v8 L% n2 BSouth Alabama Medical Center, Mobile, Alabama.
0 j; h% L' [4 }- TAddress correspondence to: Samar K. Bhowmick, MD, FACE,
: ~5 h# w% {* D* B; J. {Professor of Pediatrics, University of South Alabama, College of) x! I' z( J, ^- j: o* ]
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
- S# n2 w q% Q& [: Xe-mail: [email protected]. h& L+ M. q" A; V* k
about 6 to 7 months old, which progressively became4 B% e4 m) W b6 v E
darker. She was also concerned about the enlarge-& m" Y1 c/ n$ f/ d" g+ P/ K* N
ment of his penis and frequent erections. The child! z/ a0 T& E2 Z! M$ H( I2 c2 i( t
was the product of a full-term normal delivery, with8 Y; v9 E& l" g
a birth weight of 7 lb 14 oz, and birth length of( O5 ?; F% R, M# v$ d1 l4 H
20 inches. He was breast-fed throughout the first year
7 |. e0 g( Z; Eof life and was still receiving breast milk along with1 P1 ?, Y& m8 Q( b g
solid food. He had no hospitalizations or surgery,$ T1 \4 `0 Y7 L& B8 k& T- Z1 f5 n
and his psychosocial and psychomotor development/ w9 l% d7 C- y5 }& p
was age appropriate.( w. b% r3 `, ?1 t; ?1 ?5 ^7 T
The family history was remarkable for the father,3 ?: e5 U5 u( C& V
who was diagnosed with hypothyroidism at age 16,1 a% q" p' U& E7 d
which was treated with thyroxine. The father’s( P- O' x# L$ G& p7 h$ ~
height was 6 feet, and he went through a somewhat
& i% U- Q c" s- wearly puberty and had stopped growing by age 14.
# ^: F. I3 o" @( }The father denied taking any other medication. The
) I0 T( @+ ?9 i6 o% Uchild’s mother was in good health. Her menarche6 R9 ^( d! l- n9 M& m
was at 11 years of age, and her height was at 5 feet3 ?9 F1 t N. C3 T+ k8 d
5 inches. There was no other family history of pre-
+ v: @7 u) z- Pcocious sexual development in the first-degree rela-8 `- j3 j m+ X
tives. There were no siblings.9 d! L2 ^: X0 {) j# k$ x' `
Physical Examination
8 q% S+ L7 O% F! p! o& {The physical examination revealed a very active,
' S" b3 J) `2 D* \9 n6 D5 w: a: Wplayful, and healthy boy. The vital signs documented7 d* p1 E$ p2 I; X7 x/ m: \9 M
a blood pressure of 85/50 mm Hg, his length was& M7 M0 X2 H# t3 s- j+ t
90 cm (>97th percentile), and his weight was 14.4 kg: G5 Y/ v! Y, L+ U: [" h# J# b
(also >97th percentile). The observed yearly growth
/ F5 J: E- \+ z3 c- V9 Svelocity was 30 cm (12 inches). The examination of7 ~# R1 r! W v& i- W9 |
the neck revealed no thyroid enlargement.
$ q2 p% r1 Q# ^* W- MThe genitourinary examination was remarkable for$ C6 m$ H2 y! U/ h r+ `
enlargement of the penis, with a stretched length of
8 i0 i' o2 j, ?. |$ M8 o# s4 ^8 cm and a width of 2 cm. The glans penis was very well2 X& s% Y/ e& c k7 L/ b" S+ i
developed. The pubic hair was Tanner II, mostly around
; C8 n$ H4 {$ ^( e540
/ e- j+ \& g5 s9 Rat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from6 J9 ~0 d# o7 F! V
the base of the phallus and was dark and curled. The
$ J* ], v, @4 j- ]- j4 q, Ltesticular volume was prepubertal at 2 mL each.
( N! Y% @, \ W2 P5 {' E2 nThe skin was moist and smooth and somewhat+ p0 K& |& ^* @ [' ^7 s' S% w0 b
oily. No axillary hair was noted. There were no
9 e7 @/ M( L: O% a5 a, I, `abnormal skin pigmentations or café-au-lait spots.
1 U; y+ m' T9 FNeurologic evaluation showed deep tendon reflex 2+
3 ]6 H% b( y' W }8 Abilateral and symmetrical. There was no suggestion2 b' ]# H3 L: ^- x: [; l1 J
of papilledema.
2 | a, z* b! vLaboratory Evaluation: C$ n& ]' O" S" x
The bone age was consistent with 28 months by$ f: D7 M5 d2 k
using the standard of Greulich and Pyle at a chrono-5 `% n* ^8 D6 `1 N; y Q
logic age of 16 months (advanced).5 Chromosomal; V* C) N- `1 n1 l
karyotype was 46XY. The thyroid function test
7 p Q: k; g5 _4 X4 ^. J. g, k* Cshowed a free T4 of 1.69 ng/dL, and thyroid stimu-- N- m& ~# p+ F$ ^2 n& i5 s6 J
lating hormone level was 1.3 µIU/mL (both normal).
/ S$ }, q g: \The concentrations of serum electrolytes, blood
6 i9 E+ M" \6 t& W5 curea nitrogen, creatinine, and calcium all were+ n$ w* H; H6 R! Q; K
within normal range for his age. The concentration; b0 P% k5 K. m# A
of serum 17-hydroxyprogesterone was 16 ng/dL5 G+ j4 s, F. l; O; ^7 O" R/ Q
(normal, 3 to 90 ng/dL), androstenedione was 20
$ f# s, o+ O3 u; S/ _4 mng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-0 N' m( f! _0 o. e% x& [
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
7 [' z5 f! u+ v$ x* Odesoxycorticosterone was 4.3 ng/dL (normal, 7 to
( @9 r' _3 m& ?) E1 X" |49ng/dL), 11-desoxycortisol (specific compound S)% o6 W9 l- P8 }4 z( H3 l! n8 h2 h2 `
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor- f+ }9 L: K# B5 n& W# |& `
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
9 a7 \. r$ m" ]/ Itestosterone was 60 ng/dL (normal <3 to 10 ng/dL),% I* L6 i7 O3 M/ F' D9 E9 i& m* F
and β-human chorionic gonadotropin was less than; H& y8 \; W- ^6 Z$ m& p
5 mIU/mL (normal <5 mIU/mL). Serum follicular& Z, O$ J+ Y2 w$ q( l) w
stimulating hormone and leuteinizing hormone5 O- n. K% X! ]5 n
concentrations were less than 0.05 mIU/mL
y: x3 d4 ^, K, X, w, M6 z6 i0 H(prepubertal)./ c3 i5 d: d. N2 n
The parents were notified about the laboratory' i$ V v( t# d | ]5 t
results and were informed that all of the tests were2 @6 ?) J* b' K0 N% ]
normal except the testosterone level was high. The4 |9 [" m3 y5 j6 V2 }
follow-up visit was arranged within a few weeks to6 H5 ]( c; Y( a* h$ k' _; J4 j1 @- A7 G
obtain testicular and abdominal sonograms; how-$ ^( n2 h% \( F4 o7 b& a& L O- t
ever, the family did not return for 4 months.
0 ^6 k" {0 ]. p5 ZPhysical examination at this time revealed that the
: C+ I; x0 D* u- R% Rchild had grown 2.5 cm in 4 months and had gained; T2 N" d5 g, b6 }' _2 {; i
2 kg of weight. Physical examination remained
# x4 m' F1 i9 K2 ]2 o, T3 w% ]6 lunchanged. Surprisingly, the pubic hair almost com-# f4 Y6 K7 w( W
pletely disappeared except for a few vellous hairs at/ d; T" Y! M8 U. e; I! t9 G: d3 J$ x
the base of the phallus. Testicular volume was still 2
% h. l5 D+ L6 @: QmL, and the size of the penis remained unchanged.& ~; Q4 }) [; B+ l# n
The mother also said that the boy was no longer hav-
* u) f7 y0 `$ G, Xing frequent erections.% F% d/ X* b( D7 u; i+ d
Both parents were again questioned about use of
8 Q' F( X4 J* d; lany ointment/creams that they may have applied to
8 a! c# F1 s0 q- U* sthe child’s skin. This time the father admitted the) K* X' j( O! J6 T& Y8 R
Topical Testosterone Exposure / Bhowmick et al 541
7 K6 R. q$ X- _" j7 Uuse of testosterone gel twice daily that he was apply-
3 N5 m% ^: k1 T, g9 Wing over his own shoulders, chest, and back area for
, s; t+ E3 }+ g) @( ta year. The father also revealed he was embarrassed
* g4 {8 M6 L h" @. A; Vto disclose that he was using a testosterone gel pre-
1 M3 a6 V) _9 `+ z& o! E5 _/ J- Mscribed by his family physician for decreased libido; q0 x/ R; _. Q1 J% a9 l4 E1 u
secondary to depression.# p2 E3 V3 b# d3 {4 y7 X) g o
The child slept in the same bed with parents./ |3 k" m7 Y2 r
The father would hug the baby and hold him on his( L" t" b% K5 I( a; z- s, q
chest for a considerable period of time, causing sig-
) f: n) c Q Znificant bare skin contact between baby and father.
& c n. O3 _& s$ CThe father also admitted that after the phone call,+ ?/ ]" w+ w4 n
when he learned the testosterone level in the baby
0 a; m! m" a: S. \ l, Kwas high, he then read the product information. O1 Q# p$ P( o% P6 U
packet and concluded that it was most likely the rea-
1 u1 r$ d( X- }: g. Ison for the child’s virilization. At that time, they
) R N% M1 o; L/ g3 j# d' ?decided to put the baby in a separate bed, and the
. [+ N* q/ P& D& o! |father was not hugging him with bare skin and had
( J9 [ x1 i$ R7 t" Bbeen using protective clothing. A repeat testosterone9 G1 D. V7 _- A# p
test was ordered, but the family did not go to the+ N, I7 j' ?# \! E& v
laboratory to obtain the test.9 U; ^7 V; y' e) `3 |! v3 N
Discussion
2 [6 K# c& |; ~Precocious puberty in boys is defined as secondary
$ r$ q8 h& i2 S6 ]! Osexual development before 9 years of age.1,45 A9 f1 }% F+ Q8 {7 V; P, N
Precocious puberty is termed as central (true) when1 o8 v r% a% A3 }# M/ u0 [5 T
it is caused by the premature activation of hypo- L# n4 ]2 `4 z3 F* I9 {4 Q. s# |
thalamic pituitary gonadal axis. CPP is more com-* ?: b/ V5 m0 j/ p5 k7 N
mon in girls than in boys.1,3 Most boys with CPP2 _9 Y+ B: y$ a6 H
may have a central nervous system lesion that is
0 v4 J9 |4 L4 t! j1 ^+ v2 T gresponsible for the early activation of the hypothal- U# ]7 C6 J0 w% d9 g( w9 C0 m* A) o z! [
amic pituitary gonadal axis.1-3 Thus, greater empha-
) H% S' m' Z" W: z1 j6 Bsis has been given to neuroradiologic imaging in
: f8 s! U3 e" t2 F' fboys with precocious puberty. In addition to viril-1 [; o& |- y) v- J* {
ization, the clinical hallmark of CPP is the symmet-2 b* P$ Y' J' N) ~; _
rical testicular growth secondary to stimulation by
9 ?, ?. {5 v3 ngonadotropins.1,34 N2 G5 @3 I! B5 y1 b: {( D: A. _
Gonadotropin-independent peripheral preco-& \0 E0 `0 J& @( w
cious puberty in boys also results from inappropriate% h( w2 [0 ~$ c- j3 c+ Y
androgenic stimulation from either endogenous or
6 C; N8 |4 H% `5 B3 L; Hexogenous sources, nonpituitary gonadotropin stim-
' P# x, k1 _3 _- h. ^: X5 _( [( Lulation, and rare activating mutations.3 Virilizing
8 U. U2 I$ I- ]' Ccongenital adrenal hyperplasia producing excessive
3 k x% I/ V# U1 K2 v& e, F# p9 j9 uadrenal androgens is a common cause of precocious
' W/ |3 A* @2 V7 v; _+ lpuberty in boys.3,4
% f# I" q% H3 @8 B R3 T3 m7 c1 nThe most common form of congenital adrenal
6 L. S' ~" Q) B# o7 x* Khyperplasia is the 21-hydroxylase enzyme deficiency.
* o5 n3 |# a9 @1 AThe 11-β hydroxylase deficiency may also result in
) f; R8 P1 c2 l5 ?0 oexcessive adrenal androgen production, and rarely,
j! _) S3 C F; M1 [( W6 yan adrenal tumor may also cause adrenal androgen
* k; f# i9 H' }$ C D7 Jexcess.1,35 a0 t0 I1 T! I' Z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" k/ B4 v# v8 M p9 B1 G6 Q
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
9 L+ X. i9 A# ?A unique entity of male-limited gonadotropin-
" ]$ |" q- z+ s4 Z) E ?independent precocious puberty, which is also known
) ?7 N$ R3 J! o1 e Oas testotoxicosis, may cause precocious puberty at a. P) B4 }2 E3 @9 L8 i
very young age. The physical findings in these boys
5 N% w2 d0 x0 ewith this disorder are full pubertal development,
- z& |. q& l. @! Nincluding bilateral testicular growth, similar to boys
. m Y# `' V3 M% t7 @, twith CPP. The gonadotropin levels in this disorder
V! v4 G9 z! B# J3 {6 A# s" U5 yare suppressed to prepubertal levels and do not show6 d2 a: B1 {% p) h; U- m# w/ D5 L0 Y
pubertal response of gonadotropin after gonadotropin-
- a" i- I/ g. q0 s Rreleasing hormone stimulation. This is a sex-linked }- o9 C! I& a3 l. e
autosomal dominant disorder that affects only9 Q( P6 `& {% i* U" w* |- n
males; therefore, other male members of the family
) Z o2 |: |# d, U/ Xmay have similar precocious puberty.38 r- i! v( G! _: u$ s- ~
In our patient, physical examination was incon-9 F3 y5 J0 L1 q8 M
sistent with true precocious puberty since his testi-
8 R/ ]4 s8 q/ ]- T0 V+ ^+ S ^cles were prepubertal in size. However, testotoxicosis# r; q8 z" ~; }; E; V7 O- P
was in the differential diagnosis because his father. n, U$ Z7 J+ f2 o7 P
started puberty somewhat early, and occasionally,! F! w9 i* r4 E( x. V- a
testicular enlargement is not that evident in the
! e( d+ t% ]' wbeginning of this process.1 In the absence of a neg-
" _. l3 S$ P& S4 Bative initial history of androgen exposure, our
* b E P* B$ T: Xbiggest concern was virilizing adrenal hyperplasia,
; {/ f1 ^' N7 Z" aeither 21-hydroxylase deficiency or 11-β hydroxylase/ R7 @ Y2 |$ F+ x K+ q
deficiency. Those diagnoses were excluded by find-: x5 o3 ~8 g) G7 j$ h" v/ q
ing the normal level of adrenal steroids.) G2 Y% o/ s1 i, _8 r7 }$ K7 Z, V0 }
The diagnosis of exogenous androgens was strongly
3 n, E+ s/ e6 hsuspected in a follow-up visit after 4 months because* B0 b3 v# k$ H; l7 {8 ~4 x! C
the physical examination revealed the complete disap-9 \+ B: s2 b8 { v
pearance of pubic hair, normal growth velocity, and
% j7 G8 }: ~, p* P5 s( M+ bdecreased erections. The father admitted using a testos-
G: ^* y) t! i5 m) Uterone gel, which he concealed at first visit. He was1 x3 b0 e+ k( ] r3 p2 d
using it rather frequently, twice a day. The Physicians’
8 M7 j" N" N) h: O3 r/ H, sDesk Reference, or package insert of this product, gel or
% b# `+ z4 ~9 s/ ~; y; pcream, cautions about dermal testosterone transfer to: M7 n7 A' U' x+ \* z5 c
unprotected females through direct skin exposure.3 @, M& ?. |) A; R* s& ]# v3 _
Serum testosterone level was found to be 2 times the
4 K7 m& x; e5 L: Hbaseline value in those females who were exposed to
! e" E- j9 c# S$ yeven 15 minutes of direct skin contact with their male. X- r! M$ e- c# e
partners.6 However, when a shirt covered the applica-
* X8 d+ Q* N+ V; A- o7 B' c. S% ntion site, this testosterone transfer was prevented.9 o! \* \( x( X7 m6 c
Our patient’s testosterone level was 60 ng/mL,8 y {3 Q( t1 p; [ I
which was clearly high. Some studies suggest that- C% x9 w* @9 b& z
dermal conversion of testosterone to dihydrotestos-
* _: z7 M& C! vterone, which is a more potent metabolite, is more6 Y0 R# x5 f+ j
active in young children exposed to testosterone
2 W3 Z* t# O$ Q& w' Eexogenously7; however, we did not measure a dihy-! ^# q5 Q, x& S
drotestosterone level in our patient. In addition to
4 \% _. n8 H+ I! {, i) Gvirilization, exposure to exogenous testosterone in9 y2 j7 ~7 m- X( T
children results in an increase in growth velocity and @$ V5 `; j% P, N1 v/ B" B
advanced bone age, as seen in our patient.
0 }& v, I+ X3 ]! Y% jThe long-term effect of androgen exposure during0 r/ g: T4 s! Y7 \9 B' _' l
early childhood on pubertal development and final
5 v# A1 a3 @2 B6 {& j$ |3 T+ nadult height are not fully known and always remain
# u4 v3 w2 |/ W9 U; Aa concern. Children treated with short-term testos-
2 p! _* k$ ]' ^; }/ Rterone injection or topical androgen may exhibit some
' J0 Z" f; m" Sacceleration of the skeletal maturation; however, after, r4 V; F( c& x$ C5 E8 z
cessation of treatment, the rate of bone maturation; g1 k, H5 a, ]% U) m$ f; n
decelerates and gradually returns to normal.8,9
2 C3 [/ l/ O4 H! O: A% Y- J/ N6 c, oThere are conflicting reports and controversy
' y2 H1 [% c% B( yover the effect of early androgen exposure on adult
, [. y( L( I8 q R$ cpenile length.10,11 Some reports suggest subnormal" M; S- e) \+ h% ]0 ^" W
adult penile length, apparently because of downreg-
5 N0 e, a0 R1 M4 t% w/ i( k% Z% oulation of androgen receptor number.10,12 However,( p4 p0 l. w7 ]6 U% }; z5 M0 V
Sutherland et al13 did not find a correlation between, ~" S% D% @" S9 b3 U
childhood testosterone exposure and reduced adult
U7 N S( |- x/ F3 }1 ]' mpenile length in clinical studies.. S* p3 U6 m" ^8 o3 w* T
Nonetheless, we do not believe our patient is* p% D( A, _! k; @& e/ Y9 s
going to experience any of the untoward effects from
+ M2 G/ b9 j: u& ltestosterone exposure as mentioned earlier because, J/ Z9 U1 W1 a
the exposure was not for a prolonged period of time.4 V- D. T5 d0 y
Although the bone age was advanced at the time of6 w0 v$ Q2 s, P1 o( c( Q! K* }9 M
diagnosis, the child had a normal growth velocity at8 O. ^8 R5 j5 H! l
the follow-up visit. It is hoped that his final adult% A" Q) w( b& L: y
height will not be affected.) z/ ^* E# K- ^! r( B
Although rarely reported, the widespread avail-: R" Q A# p$ ]4 m: b. @
ability of androgen products in our society may: ?1 `* h2 C# ]1 m5 H
indeed cause more virilization in male or female2 e' h/ ~; ]- G1 P& z# I
children than one would realize. Exposure to andro-
# i# ^9 P& P: ?) k6 \: x7 I$ K" Ugen products must be considered and specific ques-
5 y# u1 w* q ?$ l( ?" J v" `tioning about the use of a testosterone product or. P# y7 t* B) e: v3 m: c* [
gel should be asked of the family members during8 q: ?/ P2 Q1 m+ F3 I! j/ r
the evaluation of any children who present with vir-( K" b; W2 S, I
ilization or peripheral precocious puberty. The diag-+ u8 B) G4 w/ W, }; H: C
nosis can be established by just a few tests and by8 d& X* ]) r5 p: R0 W
appropriate history. The inability to obtain such a( M- w$ Q6 C7 J) C0 K& x8 }4 Q: V
history, or failure to ask the specific questions, may% s2 k0 s& W8 J
result in extensive, unnecessary, and expensive
$ Y- {$ T z# R2 G# ^+ N: P# Dinvestigation. The primary care physician should be: p6 F. x7 O1 x1 I! \
aware of this fact, because most of these children/ _! \! b) E" X6 @5 N( q/ y
may initially present in their practice. The Physicians’: s( p' v; s& V$ {
Desk Reference and package insert should also put a+ O1 j$ R) h q, {" u# Y
warning about the virilizing effect on a male or
& ~$ ]- B* a7 y) x; vfemale child who might come in contact with some-
' f& n2 i. X! z7 p9 Aone using any of these products.
: @: Z2 C5 g' `8 e" KReferences
p Y; V) g$ C6 F7 j' F1. Styne DM. The testes: disorder of sexual differentiation2 r. V; x3 z+ j7 L
and puberty in the male. In: Sperling MA, ed. Pediatric
9 ~: X, m8 s# l( EEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
1 l% Z9 c8 Y1 A% G. m6 |7 }2002: 565-628.5 k& l5 k* u, s" o: Y; M
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
1 P0 H* T& j: h" I* i, {puberty in children with tumours of the suprasellar pineal
: l2 U! R; i2 c7 x) Uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' J+ g2 x: V; ^7 r% [
Topical Testosterone Exposure / Bhowmick et al 543
8 }; b" O, _- w- r( M6 N5 |8 Xareas: organic central precocious puberty. Acta Paediatr.9 z$ o8 s3 I3 S6 n, E
2001;90:751-756.
# ]0 y. s% ?6 c6 y, ^3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.2 c; P9 r/ J2 k+ I7 @
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
( D9 p3 ^3 E+ _Dekker Inc; 2003:211-238.
& C) w% V0 j* p* [2 z! I4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
8 i, O# I5 a4 g+ v7 d8 ~; q: `development in a two-year-old boy induced by topical
' }2 F- ]: u2 e7 U: ]5 m2 @4 {exposure to testosterone. Pediatrics. 1999;104:e23.
) R; f1 w$ F6 q J1 D7 g; p5. Greulich WW, Pyle SI, eds. Radiographic Atlas of8 |3 c# B4 w% m N9 D
Skeletal Development of the Hand and Wrist. 2nd ed.
1 d1 x2 R( p1 n8 n4 Z! RStanford, CA: Stanford University Press; 1959.
! F; A O- `* ~7 B, _1 C6. Physicians’ Desk Reference. Androgel 1% testosterone,( u. H% i$ j) i; Q; Q4 R- l
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
% H# ~: E x0 Y3 GEconomics Company, Inc; 2004:3239-3241./ F- s8 W5 L9 h' g1 W8 U l
7. Klugo RC, Cerny JC. Response of micropenis to topical" o+ Q- n0 Z( E4 A
testosterone and gonadotropin. J Urol. 1978;119:
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