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is a significant concern for physicians. Central; b9 ?0 V+ `& I
precocious puberty (CPP), which is mediated
* h. L; k6 Z+ g% h) Zthrough the hypothalamic pituitary gonadal axis, has
: e2 I( T/ ~% Ga higher incidence of organic central nervous system
: F Z0 d/ C3 O( ]lesions in boys.1,2 Virilization in boys, as manifested
9 Q3 j9 B& d' q7 c7 A0 }by enlargement of the penis, development of pubic
, s- ~1 m$ {6 ehair, and facial acne without enlargement of testi-
2 {2 i6 G2 j0 Y: r! V& ycles, suggests peripheral or pseudopuberty.1-3 We$ y' D* E' L% y7 |
report a 16-month-old boy who presented with the
& n8 B, J4 I# x2 i b3 |/ h0 Fenlargement of the phallus and pubic hair develop-* v g/ r$ H D4 }
ment without testicular enlargement, which was due E- _; l; r ^/ d
to the unintentional exposure to androgen gel used by& K2 Z- C, ^. g5 o. }% b3 t
the father. The family initially concealed this infor-
$ r# ?: O) s" ^8 R' k7 t7 C5 ]mation, resulting in an extensive work-up for this
- Z5 M) z2 z- mchild. Given the widespread and easy availability of- [' R! d3 x3 R
testosterone gel and cream, we believe this is proba-
3 r% y& H1 K% z, ~bly more common than the rare case report in the
% z% I" P0 }6 x" h7 M9 ?, @: Gliterature.48 [( q0 ` Q$ m# X! A$ f* U
Patient Report1 b# s9 `5 _! `
A 16-month-old white child was referred to the
7 i0 \9 D3 a" J8 qendocrine clinic by his pediatrician with the concern
3 X% G1 _) }! x" A1 `+ Dof early sexual development. His mother noticed9 h* E/ U$ D/ r: `$ }: B
light colored pubic hair development when he was. z* r4 V6 l8 V9 u( Q; F( Y
From the 1Division of Pediatric Endocrinology, 2University of% ^+ K# s$ I1 |* m8 k* ]* b9 T
South Alabama Medical Center, Mobile, Alabama.
8 T! H8 O$ o" ^. z. BAddress correspondence to: Samar K. Bhowmick, MD, FACE,! {7 g; F7 |; E: i1 V. m
Professor of Pediatrics, University of South Alabama, College of
, ]( H3 s+ N5 {6 X4 p# OMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
8 o1 ~4 ^4 ~' t; O! g5 \% ye-mail: [email protected].
3 k7 b; b" Z# K/ I0 f3 `about 6 to 7 months old, which progressively became
* ?/ L% \4 S1 U u4 qdarker. She was also concerned about the enlarge-4 n; j2 G# e+ }: }& m
ment of his penis and frequent erections. The child1 b0 w A0 C& d5 z
was the product of a full-term normal delivery, with: y" j# H" O# a7 H7 Z. ?2 w
a birth weight of 7 lb 14 oz, and birth length of& [2 K. Y, s: A% T) C& F
20 inches. He was breast-fed throughout the first year# y F5 O7 w) B2 c5 N' R
of life and was still receiving breast milk along with
( P; ]1 ]6 S2 e+ Isolid food. He had no hospitalizations or surgery,( d7 T- J/ z- |4 D
and his psychosocial and psychomotor development
* _5 G5 }# P3 H M i# u! _was age appropriate./ |$ y3 J+ v; O" T
The family history was remarkable for the father,5 R% ]7 g3 A' \# L9 J* O
who was diagnosed with hypothyroidism at age 16,$ O) c. y( u. j* ~
which was treated with thyroxine. The father’s
, y1 U# F) G6 q% c1 A$ K5 t$ Sheight was 6 feet, and he went through a somewhat. o( y$ L5 l+ A H
early puberty and had stopped growing by age 14.) c" }- ? F! I% u; Y2 S
The father denied taking any other medication. The: C3 U9 Y, t5 t
child’s mother was in good health. Her menarche
* R( N5 A. `9 F+ S/ Y6 N0 Nwas at 11 years of age, and her height was at 5 feet
: L. Q' ^* Q/ |& W3 J5 inches. There was no other family history of pre-
7 n* q: e" f# s; o' F) c. L, Bcocious sexual development in the first-degree rela-
/ }6 k9 b( s* b, Y* ] r: Ktives. There were no siblings.& f8 _( P$ w O
Physical Examination
9 u! H, K) c9 T5 WThe physical examination revealed a very active,
( R. n, w. L5 a) ?playful, and healthy boy. The vital signs documented% v' A) Y3 B/ b& S
a blood pressure of 85/50 mm Hg, his length was
. f8 x8 I: X0 E$ y5 c90 cm (>97th percentile), and his weight was 14.4 kg
' e- O& i" k0 X(also >97th percentile). The observed yearly growth
6 v: J9 H8 h. v: {/ s- v/ G. hvelocity was 30 cm (12 inches). The examination of# ?# F3 p: @3 L/ K. |
the neck revealed no thyroid enlargement.4 V, C$ ?8 |3 F* B" o r
The genitourinary examination was remarkable for5 [) ]7 d3 F4 s- h# L# u9 [
enlargement of the penis, with a stretched length of* j# x6 K8 |9 }& Z _
8 cm and a width of 2 cm. The glans penis was very well
S: I- C I# j* Wdeveloped. The pubic hair was Tanner II, mostly around! H2 @1 W7 i( B: U5 [" t
540
4 O" U! F4 i |& r( J$ W, lat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" z# J* s2 o% F% o
the base of the phallus and was dark and curled. The% o- D1 h$ P- S, s8 h b. [- L
testicular volume was prepubertal at 2 mL each.
4 |- Y6 b7 `# c2 N3 }The skin was moist and smooth and somewhat& o0 m: T; ?/ z, L
oily. No axillary hair was noted. There were no
2 a3 c+ W U2 Q5 _( Oabnormal skin pigmentations or café-au-lait spots.2 }2 o7 _6 ]$ L C. `4 P
Neurologic evaluation showed deep tendon reflex 2+
9 p) O5 a" m( J& `bilateral and symmetrical. There was no suggestion8 d+ D+ G2 f( X9 D& @& l
of papilledema.
7 E, r3 O: A9 i! TLaboratory Evaluation+ r3 F+ f3 \8 \$ q: L. ^
The bone age was consistent with 28 months by
, e1 L4 o- S5 l' Q2 c% ?5 Iusing the standard of Greulich and Pyle at a chrono-
" M3 i, \: V* c% jlogic age of 16 months (advanced).5 Chromosomal% N7 G. |, b8 {$ t* G' t: O
karyotype was 46XY. The thyroid function test
1 p' E# i. V& y3 |showed a free T4 of 1.69 ng/dL, and thyroid stimu-
8 q* O, U' V+ f+ U& X8 zlating hormone level was 1.3 µIU/mL (both normal).
6 a* {8 l' T bThe concentrations of serum electrolytes, blood6 G1 E) o6 C' P5 c1 f) {" U! M0 K
urea nitrogen, creatinine, and calcium all were
) D5 A$ c% A) T9 N3 f- Zwithin normal range for his age. The concentration
: ]" J: I$ Y0 m$ Bof serum 17-hydroxyprogesterone was 16 ng/dL
+ |2 k' a( ~. g }(normal, 3 to 90 ng/dL), androstenedione was 20 w! f, k+ s0 ?3 o
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
/ _6 {. C* U1 xterone was 38 ng/dL (normal, 50 to 760 ng/dL),
# B. ?$ y- a+ q( k- R& qdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
4 x: }" |2 v& @; q& k, Z: m49ng/dL), 11-desoxycortisol (specific compound S)
, h. w( d# I& y3 C7 u% Owas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-. j5 Z! I4 I( a8 C9 @) Z
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
& N; ?, s) c# a. r+ Otestosterone was 60 ng/dL (normal <3 to 10 ng/dL),! `/ @, I6 v5 z- `& m9 r
and β-human chorionic gonadotropin was less than
& r F$ O+ @$ L0 u# t. c5 mIU/mL (normal <5 mIU/mL). Serum follicular1 R; v; A1 v/ O2 ^
stimulating hormone and leuteinizing hormone
1 E/ G; k6 @* x/ x( w2 e4 z: Dconcentrations were less than 0.05 mIU/mL
) b, q: Q- r) C. k% b(prepubertal)." a0 b- V7 l* F! _. m9 q
The parents were notified about the laboratory# v1 G0 `! v9 ? C. g) w0 H
results and were informed that all of the tests were( v* z+ x5 t1 x
normal except the testosterone level was high. The
/ X K8 \6 O, Ifollow-up visit was arranged within a few weeks to. r: V- H3 Z) B& v* e
obtain testicular and abdominal sonograms; how-- {- z- d, s/ V
ever, the family did not return for 4 months.
5 w% W" D$ U/ {Physical examination at this time revealed that the) `5 w @( G. H# t/ i
child had grown 2.5 cm in 4 months and had gained
' x2 L, v3 _; c( I2 kg of weight. Physical examination remained
- u. \! d0 D) R6 u1 S, Gunchanged. Surprisingly, the pubic hair almost com-) Q& z& K8 t+ }9 N
pletely disappeared except for a few vellous hairs at9 v- ~7 X& n7 \& _ v3 f6 G# z
the base of the phallus. Testicular volume was still 2; \5 U& t. T5 ~- y
mL, and the size of the penis remained unchanged.
4 p6 m6 n3 G0 v: p) e# E: d7 ^. ?! dThe mother also said that the boy was no longer hav-
3 {! z' v0 q8 u) _9 Wing frequent erections.
3 Y. R6 c$ @- c8 U6 _2 `5 |% eBoth parents were again questioned about use of
, Q2 j" Q! k% s& wany ointment/creams that they may have applied to
& D! _9 d% s( G! R. @% w7 b5 A! Hthe child’s skin. This time the father admitted the1 b, ]' L, _8 X$ m% ]1 a; m ?
Topical Testosterone Exposure / Bhowmick et al 541
- t; {5 G; z/ j) [' Euse of testosterone gel twice daily that he was apply-
7 l$ R0 e( i' b! I3 xing over his own shoulders, chest, and back area for
1 K. F# S+ c2 r& a# La year. The father also revealed he was embarrassed
' ], w* o4 ?4 v: O( L/ gto disclose that he was using a testosterone gel pre-7 s, q/ v4 v& O* }( v
scribed by his family physician for decreased libido
0 j. }* s) c0 c! q) R2 H" fsecondary to depression.4 N( j9 V5 J9 n. R
The child slept in the same bed with parents.
) }$ W" D+ V- _ MThe father would hug the baby and hold him on his
6 P s9 x0 t) f+ c! Rchest for a considerable period of time, causing sig-5 N, |8 |+ z# q5 }3 T- \ H
nificant bare skin contact between baby and father.
/ ?) a( {8 ^. A. ~+ q: IThe father also admitted that after the phone call,) ?& ?9 F; y+ y
when he learned the testosterone level in the baby) g& H) V: F7 U7 ^% {
was high, he then read the product information! c" _, }) { t3 `& o) x- U
packet and concluded that it was most likely the rea-
8 z8 P+ v" e/ }, oson for the child’s virilization. At that time, they- P, {6 i* ^9 V$ X S+ a* K3 J
decided to put the baby in a separate bed, and the
! ?9 t$ c! P2 i" yfather was not hugging him with bare skin and had, p& _7 K( {+ J- p# q# i' j; c
been using protective clothing. A repeat testosterone
% D1 J8 N3 s; v2 n8 ztest was ordered, but the family did not go to the
1 H1 f$ C& W0 b- }laboratory to obtain the test.. m$ y! z- w% L) W* H( J
Discussion
5 x0 J* p% ?9 A m5 r p/ XPrecocious puberty in boys is defined as secondary- T4 v/ x3 h. R( [
sexual development before 9 years of age.1,4' B* a0 V5 M3 ?" [+ \
Precocious puberty is termed as central (true) when+ J1 `$ s, g5 L1 }
it is caused by the premature activation of hypo-
5 A" g7 e% K" u$ \7 [thalamic pituitary gonadal axis. CPP is more com-
1 [' H; I% g, d8 K" N V+ [& q& zmon in girls than in boys.1,3 Most boys with CPP1 V8 G4 d' T1 c, d K
may have a central nervous system lesion that is+ f8 I Q* P, V
responsible for the early activation of the hypothal-9 P9 k% c Q% H h
amic pituitary gonadal axis.1-3 Thus, greater empha-
6 U- q) t7 L( z. {sis has been given to neuroradiologic imaging in
l5 |' b# n7 m8 o" {- e# Tboys with precocious puberty. In addition to viril-9 [1 u I# a: T) L9 v
ization, the clinical hallmark of CPP is the symmet-
$ y& E9 p; r6 K \$ _. V# { L! |rical testicular growth secondary to stimulation by
' v/ Y& v2 J. e# B6 [gonadotropins.1,3
1 d- o' d( M& ?, `Gonadotropin-independent peripheral preco-+ \3 [# J, M' A' e& u! l
cious puberty in boys also results from inappropriate
$ m, n2 s" f& O3 |4 Gandrogenic stimulation from either endogenous or* S6 t- Z b9 P- v& v$ t* {4 r
exogenous sources, nonpituitary gonadotropin stim-
( T. X: G% o5 J W4 l6 g$ xulation, and rare activating mutations.3 Virilizing
; f4 L$ q/ x% X3 V+ qcongenital adrenal hyperplasia producing excessive
) p' D0 F% {: `' T* U. Iadrenal androgens is a common cause of precocious
4 }( B. A4 F$ \2 }( E2 b" _puberty in boys.3,41 B# [* Q4 M/ B- e- g; w& P
The most common form of congenital adrenal2 t1 ]9 [" W; J! E$ K3 B% A
hyperplasia is the 21-hydroxylase enzyme deficiency.9 u g u- n, v* L. v7 i# ~
The 11-β hydroxylase deficiency may also result in# u/ L4 E- F0 q+ z* q" x% R ]
excessive adrenal androgen production, and rarely,
4 }9 ~- Z( N5 ]an adrenal tumor may also cause adrenal androgen
3 g \" w" Y$ P( n* Rexcess.1,3' ~5 U% M( p; e0 ~
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% f9 X h W! w1 ]
542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 v7 C6 J0 _4 u3 o& s ]- a) b
A unique entity of male-limited gonadotropin-
$ P; c# M6 W4 D: yindependent precocious puberty, which is also known+ h2 \/ `) j1 J5 W; q7 d( c
as testotoxicosis, may cause precocious puberty at a
) b9 G+ r+ w2 X6 R" p' t& s, nvery young age. The physical findings in these boys; f C: l8 \; |) D# [3 j/ C1 P
with this disorder are full pubertal development,
; {1 B3 d4 I; ^% H; u7 y* G' L0 ~including bilateral testicular growth, similar to boys
3 w4 @% J) \7 Ewith CPP. The gonadotropin levels in this disorder
& Y- G" v O% |5 kare suppressed to prepubertal levels and do not show! H' X* N( | z8 E' c
pubertal response of gonadotropin after gonadotropin-
% \8 r/ h) i5 D! H7 R& l6 freleasing hormone stimulation. This is a sex-linked6 S0 O5 [' |3 x' ^ [. k. K6 C
autosomal dominant disorder that affects only$ h# T3 Z4 ]. M2 F
males; therefore, other male members of the family
; k/ F9 ~- H8 g3 v* g' T" O: a$ }may have similar precocious puberty.3$ e) T+ B- c( d1 c2 Y7 Y
In our patient, physical examination was incon-
& M) g: r9 o. Y! D6 A! Wsistent with true precocious puberty since his testi-
2 ~2 G" V8 l: S+ lcles were prepubertal in size. However, testotoxicosis
! b1 }, |% f' W# Lwas in the differential diagnosis because his father# R0 ^1 D* b9 `7 U/ c
started puberty somewhat early, and occasionally,1 B i, h. N& e8 v* r
testicular enlargement is not that evident in the
% p* U# N+ v8 d' _! H' X0 Sbeginning of this process.1 In the absence of a neg-
/ u% P) |. u3 Iative initial history of androgen exposure, our+ ^6 H; t* E" b0 |& P1 d( c" V' A0 G
biggest concern was virilizing adrenal hyperplasia,
- B1 p [. @3 b; S k; W( Leither 21-hydroxylase deficiency or 11-β hydroxylase8 y) m3 X! G6 X
deficiency. Those diagnoses were excluded by find-
5 f- l8 d+ v5 T& `: ?3 bing the normal level of adrenal steroids.
$ [$ ~4 o. a( Z) b, n( IThe diagnosis of exogenous androgens was strongly
9 j) Q: K3 g2 ~2 ]: Fsuspected in a follow-up visit after 4 months because
! U& U) ^% q9 B+ ?! ~ U( P3 M9 Hthe physical examination revealed the complete disap-
+ }; A% D4 Y7 a& B! g2 upearance of pubic hair, normal growth velocity, and' u" a) a& b5 U. @) W; E1 G& h
decreased erections. The father admitted using a testos-
/ |, m7 Z, ~5 b3 _! O2 dterone gel, which he concealed at first visit. He was
0 @8 l! _, s9 C; ^ I3 @3 Z& ousing it rather frequently, twice a day. The Physicians’' J J5 a. o5 n" [0 B
Desk Reference, or package insert of this product, gel or- M4 ^2 G9 {2 F. o: d
cream, cautions about dermal testosterone transfer to
8 y& m( Z% |: r% Y" D7 i) x& Uunprotected females through direct skin exposure.+ D6 V4 U- b( J+ G4 B
Serum testosterone level was found to be 2 times the
" I; X" M Q# @2 K9 Jbaseline value in those females who were exposed to9 R+ U9 Q9 p) [8 ~
even 15 minutes of direct skin contact with their male- f6 v* e4 e6 {
partners.6 However, when a shirt covered the applica-
& |( U0 F) O$ ction site, this testosterone transfer was prevented.2 f E+ S, Z" O0 D. V7 u+ @
Our patient’s testosterone level was 60 ng/mL,/ V! `# w. o4 i
which was clearly high. Some studies suggest that) p4 {) @$ L; b9 N/ n, H$ X$ Y
dermal conversion of testosterone to dihydrotestos-
( r) g# t2 s \! o6 d4 zterone, which is a more potent metabolite, is more
& l3 e, m2 L! i6 D6 [2 Tactive in young children exposed to testosterone2 S/ h4 f7 v" D9 S5 q7 }, i
exogenously7; however, we did not measure a dihy-
/ s* y/ J! g: q, ]drotestosterone level in our patient. In addition to
8 F& x9 q3 j% K, Z5 F; q. L4 ]virilization, exposure to exogenous testosterone in
/ m/ X* T! \8 X, ]children results in an increase in growth velocity and
# t9 w0 r1 q: t5 jadvanced bone age, as seen in our patient.
7 S0 Y/ Y, i( t7 c* d. N- TThe long-term effect of androgen exposure during9 ^+ I: ~+ N' v+ w; I8 h/ Q8 b0 f; _
early childhood on pubertal development and final: B( n$ I- ~5 x B* `
adult height are not fully known and always remain! T3 r" {% K% @' ?$ L! `3 \6 G' x% Q
a concern. Children treated with short-term testos-5 w4 G6 N1 \# q- u! Y" Y7 x
terone injection or topical androgen may exhibit some0 v2 w6 m: k; H- o& K
acceleration of the skeletal maturation; however, after, Q3 E4 I( R: E% x1 h# s7 T
cessation of treatment, the rate of bone maturation6 g' r& e6 o b0 V
decelerates and gradually returns to normal.8,9" E! g* u9 N, e/ n, ], `
There are conflicting reports and controversy
7 e" Y# l1 F' Wover the effect of early androgen exposure on adult
4 y3 C0 p s( P9 u& _penile length.10,11 Some reports suggest subnormal
- Z5 N2 S$ O2 [0 K& ~2 P3 E' Y! h/ }+ oadult penile length, apparently because of downreg-5 U8 Z9 B( a# ]
ulation of androgen receptor number.10,12 However,
l# S. q5 ?- ~; I; b( {: gSutherland et al13 did not find a correlation between% j. J \" G% L2 ^& b
childhood testosterone exposure and reduced adult
- T; W" i% b, \; u ?* D7 Wpenile length in clinical studies.5 V1 `; J$ E$ U
Nonetheless, we do not believe our patient is
$ f9 u5 M, v6 q3 ugoing to experience any of the untoward effects from' F/ }# ?9 t* M5 r4 x" A5 b) v
testosterone exposure as mentioned earlier because
) \& Q4 L) b4 M5 Y, }the exposure was not for a prolonged period of time.- s T/ j' Z4 A3 M9 }+ c
Although the bone age was advanced at the time of
2 ]# x# l( U* Tdiagnosis, the child had a normal growth velocity at
: H M/ i: W& ?+ mthe follow-up visit. It is hoped that his final adult k$ {# a! j5 ~' p: f% B) e
height will not be affected.
; d' t# a& p' V ~Although rarely reported, the widespread avail-
3 K- a. K$ ~) W, J- P. }$ Y- fability of androgen products in our society may# {9 [# U" [' _% K) O( q1 u
indeed cause more virilization in male or female
( q2 |1 B8 L, Z8 a+ Tchildren than one would realize. Exposure to andro-5 r: L* s1 R6 t0 N- [$ z4 ^) f
gen products must be considered and specific ques-
+ s: Y |& W0 z/ i, u8 }! X- }9 ltioning about the use of a testosterone product or
7 g2 _- D6 z$ L' Q! egel should be asked of the family members during
5 ~; z1 u! r0 _5 _: kthe evaluation of any children who present with vir-4 ~4 X; ? ^% T7 l' l4 ~
ilization or peripheral precocious puberty. The diag-
+ ]! r; c, I, `2 e: Q$ J7 x! inosis can be established by just a few tests and by; g* }$ {7 G9 Q5 A0 m% ?" [$ \
appropriate history. The inability to obtain such a. W! R9 r r ]0 ~- }7 |: N- q9 B$ T
history, or failure to ask the specific questions, may [1 N0 P9 t8 O9 O6 u& c
result in extensive, unnecessary, and expensive- {1 a1 y7 z5 H; T
investigation. The primary care physician should be: `8 ?, f; G+ c
aware of this fact, because most of these children9 I- ?4 s+ }$ p. W
may initially present in their practice. The Physicians’
0 [: C& k7 H( HDesk Reference and package insert should also put a
) v9 h/ |4 k( M% @. Nwarning about the virilizing effect on a male or
. \; H' I4 k" K: Zfemale child who might come in contact with some-# ~3 r: ?1 }- |4 g5 U, a* n
one using any of these products.
# L1 T, y- a8 s( Z) Z' J- ZReferences; K! i5 L7 v- f! W8 f' D! x0 w, ]7 J
1. Styne DM. The testes: disorder of sexual differentiation
+ b, G* x8 a- ~! E! rand puberty in the male. In: Sperling MA, ed. Pediatric8 f' y$ n5 i( X3 ]% q# L! }4 E; d
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
1 Y8 Q# i$ D% b: X" F' a2002: 565-628., Z' M, e+ I, r8 D3 L; J q
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
4 H6 G) D5 S' a3 D9 Ipuberty in children with tumours of the suprasellar pineal2 D U! R! P/ n, N. N9 d+ {
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from/ i& l6 D; I4 K
Topical Testosterone Exposure / Bhowmick et al 543
3 S" q1 Y2 _* B9 ^areas: organic central precocious puberty. Acta Paediatr." a: Q6 F( C4 i8 Z$ n
2001;90:751-756.. P! B8 E$ K- I( L3 m# y
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.# \4 r8 _/ X# ]
Pediatric Endocrinology. 4th ed. New York, NY: Marcel' a; I, X# [/ d _6 h0 d4 s" k8 [
Dekker Inc; 2003:211-238.3 ]9 _# s3 p! g* K& y& F$ a/ o$ [
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
& j* v) l) E0 `, o9 ydevelopment in a two-year-old boy induced by topical
3 H" { Q& @4 t0 lexposure to testosterone. Pediatrics. 1999;104:e23. Y" P& S% S4 K6 \2 }5 `0 S
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
8 W# X9 {; N; U( Z3 j- w0 [Skeletal Development of the Hand and Wrist. 2nd ed.
3 U( \( F. m y, F4 \Stanford, CA: Stanford University Press; 1959.
9 H, W' E& J. A: c6. Physicians’ Desk Reference. Androgel 1% testosterone,
$ z- v0 e5 S/ F+ h- G' v; [Unimed Pharmaceutical Inc. Montvale, NJ: Medical9 I5 s8 a$ E& G# S: O6 `
Economics Company, Inc; 2004:3239-3241.
9 `1 N8 }' ?; m7. Klugo RC, Cerny JC. Response of micropenis to topical
, }: B) ^& `( @: |& @/ `testosterone and gonadotropin. J Urol. 1978;119:
: n( `+ s9 f0 z- A( @+ p3 E667-668.: G5 \; w# L& U. ]
8. Guthrie RD, Smith DW, Graham CB. Testosterone* D/ E( r7 w- G s9 x! ^ ?
treatment for micropenis during early childhood. J Pediatr.
+ V2 I1 F* f/ D8 d1973;83:247-252.) ^5 d! D, a8 C9 h# z5 F6 T
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone9 i' h* l0 f( n" H. R
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