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is a significant concern for physicians. Central/ Y" }- T% Q$ Q5 O3 l" o' L; L& _
precocious puberty (CPP), which is mediated
( i( T+ @+ ]) Vthrough the hypothalamic pituitary gonadal axis, has
* d; y0 U [# c- T; Ga higher incidence of organic central nervous system
2 g- ~" l- q& N. ^7 zlesions in boys.1,2 Virilization in boys, as manifested
( z; T, }0 r+ D2 Hby enlargement of the penis, development of pubic
* E0 d) b& H A5 Z5 |* H3 R. ~2 hhair, and facial acne without enlargement of testi-
2 T7 |, I _" O9 R1 `cles, suggests peripheral or pseudopuberty.1-3 We
0 }3 P% w3 K* Rreport a 16-month-old boy who presented with the
* I& I- N' X: Venlargement of the phallus and pubic hair develop-
9 \1 h, u7 G+ @$ \ Q* pment without testicular enlargement, which was due
* a4 d! K+ j5 Y8 i0 kto the unintentional exposure to androgen gel used by
t! t, v8 S7 c& [1 w6 }/ }the father. The family initially concealed this infor-+ ^. ^8 ]- X& W/ X- C
mation, resulting in an extensive work-up for this
5 B# S) H* o3 `6 Kchild. Given the widespread and easy availability of0 }! W$ }% ]5 ?# s1 U3 {
testosterone gel and cream, we believe this is proba-
$ q' g. J$ F+ L/ E( @3 Vbly more common than the rare case report in the
9 d% @# j% \- N. \) n+ Bliterature.47 C- l# ]( l6 J. K7 w( C
Patient Report
) a4 u0 S2 Z+ |& FA 16-month-old white child was referred to the
. Y: V: s8 u1 W7 k( z% Nendocrine clinic by his pediatrician with the concern
. O5 c, |9 q$ Rof early sexual development. His mother noticed# @' j; X9 _9 W1 E7 K- T1 |! o/ L
light colored pubic hair development when he was* T3 l/ i2 a" z9 j; {
From the 1Division of Pediatric Endocrinology, 2University of2 F; T( d( n `. {
South Alabama Medical Center, Mobile, Alabama.
* x8 @ C/ N) R' rAddress correspondence to: Samar K. Bhowmick, MD, FACE,7 y" c' n1 x y6 Y* o: _) Y
Professor of Pediatrics, University of South Alabama, College of
) u+ k. b' g" eMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;5 n* l9 C; m2 i6 \3 i) P6 m# x
e-mail: [email protected].$ L4 a: P2 R# s8 X
about 6 to 7 months old, which progressively became
8 `0 p1 d0 z& N) h# u3 N) k8 Ddarker. She was also concerned about the enlarge-/ t6 N1 Q! W. M/ S9 I4 ?
ment of his penis and frequent erections. The child" @$ ^5 j' F& Y9 J1 I3 P
was the product of a full-term normal delivery, with' K% p m- I$ [5 g
a birth weight of 7 lb 14 oz, and birth length of
2 X3 V" h# @# Q# r. P20 inches. He was breast-fed throughout the first year/ | \: o- x8 k9 y
of life and was still receiving breast milk along with& n0 r! c# ?$ S# K
solid food. He had no hospitalizations or surgery,
0 h, \" x) u! E3 aand his psychosocial and psychomotor development
* @2 X9 G! ?9 z7 Gwas age appropriate.7 s+ w" v9 J3 t
The family history was remarkable for the father,) q1 q" c7 j/ t$ \. e
who was diagnosed with hypothyroidism at age 16,
6 H% k3 Z+ g6 S+ lwhich was treated with thyroxine. The father’s
; v. b3 _ `8 M* j. Jheight was 6 feet, and he went through a somewhat5 c" Q4 _( g. ~+ b3 }; k# g2 P5 e, O% {
early puberty and had stopped growing by age 14.
9 W+ h" q2 M& s0 I. c6 S9 h4 E4 TThe father denied taking any other medication. The
2 [" O' G1 K. h$ ^2 N/ ychild’s mother was in good health. Her menarche
- |# _# }2 e# t# T7 jwas at 11 years of age, and her height was at 5 feet
6 _ T: v$ h% U2 }# b G, `/ S5 inches. There was no other family history of pre-% ]$ y1 P+ j( u7 y$ m( e7 Q z
cocious sexual development in the first-degree rela-6 Q* `& C# l7 F4 O
tives. There were no siblings.
4 p8 O( y9 w, m8 XPhysical Examination0 N; k4 M! m4 C7 Y. d
The physical examination revealed a very active,7 n$ a2 ]# B2 C' B" w. j' B
playful, and healthy boy. The vital signs documented
/ u% U0 f5 H! Z/ m/ J: `a blood pressure of 85/50 mm Hg, his length was
* h/ J: V# K2 l4 v) D! n! W* S* [90 cm (>97th percentile), and his weight was 14.4 kg
, B+ R$ |* K0 D$ x2 [# C6 S+ h5 \(also >97th percentile). The observed yearly growth* D/ R2 `9 g; P4 C( y- Q! S
velocity was 30 cm (12 inches). The examination of
* v; b. A* G$ ?9 ?. Gthe neck revealed no thyroid enlargement.4 f u( h5 v1 [5 {! E
The genitourinary examination was remarkable for
* L# n( u/ F; P( l( F6 p: v9 _enlargement of the penis, with a stretched length of/ d; K- b7 }! s2 W
8 cm and a width of 2 cm. The glans penis was very well
9 [2 N; m& ~: Mdeveloped. The pubic hair was Tanner II, mostly around2 n" z8 `& k. c9 t1 D9 v1 ]
540
& Z' ^6 v ], K5 Rat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! b1 y- h9 J$ w9 \+ Wthe base of the phallus and was dark and curled. The
: s, p5 w. r) Y1 C: Q( atesticular volume was prepubertal at 2 mL each.
5 I2 `5 O# Z7 y( O# ~2 HThe skin was moist and smooth and somewhat. R6 L5 J' @8 R8 V$ f
oily. No axillary hair was noted. There were no* U- u5 q( F6 R1 I7 t- d
abnormal skin pigmentations or café-au-lait spots.7 \: s f# Y! S* p$ I4 n' ?
Neurologic evaluation showed deep tendon reflex 2+
6 V; [2 W; W: `4 f pbilateral and symmetrical. There was no suggestion
. p/ A5 ~6 ~6 J Iof papilledema.
/ [: Z w! ~0 X& q- P9 R4 jLaboratory Evaluation, f/ H+ O- _% U- U. J$ U. T
The bone age was consistent with 28 months by2 w$ h5 w% ]( I4 G% M
using the standard of Greulich and Pyle at a chrono-! y: ~, x+ h4 N+ g/ P7 t- ]
logic age of 16 months (advanced).5 Chromosomal
& H% x: I& A" m- N+ U5 Jkaryotype was 46XY. The thyroid function test
4 u8 h+ u/ ^8 K& @. w8 Gshowed a free T4 of 1.69 ng/dL, and thyroid stimu-* O0 k: n6 W3 m# i; H1 A' M
lating hormone level was 1.3 µIU/mL (both normal).
% H: @2 E, ?, J' Z6 @The concentrations of serum electrolytes, blood2 {* s& P* z% U6 g1 v5 n5 m
urea nitrogen, creatinine, and calcium all were
j& k9 @. e) @. j6 T9 kwithin normal range for his age. The concentration0 E( _' U/ l) i5 w; x/ S2 o
of serum 17-hydroxyprogesterone was 16 ng/dL+ X4 @" j: c/ _: r
(normal, 3 to 90 ng/dL), androstenedione was 20
" H+ K$ g6 w+ r, mng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
; k7 j/ `+ U+ P _4 G! @8 \terone was 38 ng/dL (normal, 50 to 760 ng/dL),
5 e' o7 X4 h- O0 V" Q$ n4 mdesoxycorticosterone was 4.3 ng/dL (normal, 7 to& \! d; R& g* w1 J8 @
49ng/dL), 11-desoxycortisol (specific compound S)6 V, Y, d% ^. _$ Y% X
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-& R6 E& n9 A$ ?! j0 N
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
+ n0 f9 @* B5 E/ i: \; \2 N( ^ ltestosterone was 60 ng/dL (normal <3 to 10 ng/dL),. p1 {% r3 G, F, M: b
and β-human chorionic gonadotropin was less than, R/ o- Y, i0 {0 ~
5 mIU/mL (normal <5 mIU/mL). Serum follicular
& B9 M9 c. A+ Bstimulating hormone and leuteinizing hormone: r, r( L. s: Z
concentrations were less than 0.05 mIU/mL/ C7 G) R3 p1 x3 W- A
(prepubertal).9 D: s5 e a) K) u! r6 a8 ?
The parents were notified about the laboratory
. L0 T# c @7 {" k* A5 L! Y. fresults and were informed that all of the tests were3 }* y3 J7 w3 e- m
normal except the testosterone level was high. The
1 c/ |& g: w- j6 J {1 dfollow-up visit was arranged within a few weeks to
* r! X8 I. Q2 t* j, S( `( Robtain testicular and abdominal sonograms; how-
: \4 y# P1 H2 B- {5 S) a+ _ever, the family did not return for 4 months. n8 B0 {. d0 Z
Physical examination at this time revealed that the
% \$ }3 r5 n0 E0 Q, z) v; L' o6 _child had grown 2.5 cm in 4 months and had gained
) @' Z, F( k3 ~. d0 y2 kg of weight. Physical examination remained* J: Q' s; T- E5 T0 \0 H
unchanged. Surprisingly, the pubic hair almost com-' K3 I4 Y O1 J7 i' g
pletely disappeared except for a few vellous hairs at
) v8 X( v/ J/ B( Nthe base of the phallus. Testicular volume was still 2
) F" C5 ~4 p& y& [* x- |# A& O7 kmL, and the size of the penis remained unchanged.
2 u# K" S5 A2 XThe mother also said that the boy was no longer hav-9 Z- V! K& O* b1 e( L( s
ing frequent erections.
/ ?- s; o2 X$ i8 v ]) wBoth parents were again questioned about use of
6 _* N8 D) D2 K- y1 ~any ointment/creams that they may have applied to
, g: @# \! p% |7 [5 v$ M2 jthe child’s skin. This time the father admitted the
: k* c2 K+ T1 b9 z. \Topical Testosterone Exposure / Bhowmick et al 5415 x, i1 g5 k: G8 b2 h
use of testosterone gel twice daily that he was apply-' P$ ~- Y- X( v; V) Q- l
ing over his own shoulders, chest, and back area for' D2 n& q( P! b+ s2 I! A; O- k4 M
a year. The father also revealed he was embarrassed
2 {/ i2 v3 m% Q& K% nto disclose that he was using a testosterone gel pre-1 {1 O" K* _0 f0 v- T
scribed by his family physician for decreased libido9 Q) s) X' }4 |9 G4 E, d$ H, Q
secondary to depression.
, O# Z: _$ \: ?: B; N4 h) |9 IThe child slept in the same bed with parents.
& W2 s: b) F! o( z8 U, T1 VThe father would hug the baby and hold him on his; ^: q" M/ K$ e2 Z
chest for a considerable period of time, causing sig-
4 A, O/ R: t9 f0 ^nificant bare skin contact between baby and father.
+ O0 I v; X; \+ K, P6 c7 dThe father also admitted that after the phone call,
2 x- ]) ~2 q+ P {% xwhen he learned the testosterone level in the baby; m/ _4 V* E3 a+ D6 G6 Z( F" W
was high, he then read the product information3 {/ b: A2 r" k# T4 o& o3 h
packet and concluded that it was most likely the rea-
0 H7 s; i& F: C: f( g7 |5 ?son for the child’s virilization. At that time, they
. g' o8 }4 i6 S) Ydecided to put the baby in a separate bed, and the8 t M3 ?$ w6 p: K
father was not hugging him with bare skin and had
3 {6 s4 {2 c3 Zbeen using protective clothing. A repeat testosterone( I3 f9 @; }) A8 r3 n% _9 {, D
test was ordered, but the family did not go to the
% ~5 S" }, @: K! Q; p8 `% R# _laboratory to obtain the test.6 `* Y, R/ Q+ w. g9 ?) |
Discussion' B- G& w% _4 |/ R8 a
Precocious puberty in boys is defined as secondary3 W! {% b( w" F5 K' n
sexual development before 9 years of age.1,4) g/ w: b) b2 _! b& ]% o
Precocious puberty is termed as central (true) when: T7 L* j9 ~5 p+ R' w+ A+ u$ Y% L
it is caused by the premature activation of hypo-; k$ J7 X" z) C; b. c" _
thalamic pituitary gonadal axis. CPP is more com-# K! J- N, q2 B
mon in girls than in boys.1,3 Most boys with CPP M- R4 X, f4 Z; _3 J. N% l
may have a central nervous system lesion that is: n3 l @4 P. K9 W( H
responsible for the early activation of the hypothal-
- b9 H9 C& V+ Z, X$ b1 q5 m6 famic pituitary gonadal axis.1-3 Thus, greater empha-
7 d* g. W/ S- Gsis has been given to neuroradiologic imaging in
) ]; {( N( J8 C9 ?/ O+ Iboys with precocious puberty. In addition to viril-
' ?# Z l' B1 R# c1 r+ {& _0 bization, the clinical hallmark of CPP is the symmet-
9 N4 Z9 v" w) Yrical testicular growth secondary to stimulation by0 s1 b2 T5 O0 W4 o6 c
gonadotropins.1,3
, F L+ a2 A1 m! v- h% I0 w9 JGonadotropin-independent peripheral preco-
! i7 T, t* @6 s+ w% p1 f/ ]! j- D- ccious puberty in boys also results from inappropriate/ `! Q0 u9 m# {: Y5 q
androgenic stimulation from either endogenous or& R v7 e, {6 H/ T- X* G
exogenous sources, nonpituitary gonadotropin stim-7 |' P! `* }$ w+ J
ulation, and rare activating mutations.3 Virilizing
$ t: i/ F. O9 T0 dcongenital adrenal hyperplasia producing excessive
1 C) `# b: w$ }) |. x/ M" Sadrenal androgens is a common cause of precocious
8 x2 t, |2 c9 Opuberty in boys.3,4' v9 y8 k; T5 i6 G
The most common form of congenital adrenal
, M7 R9 r7 d2 L7 [: U/ L hhyperplasia is the 21-hydroxylase enzyme deficiency.
8 q9 Q) O5 ?) E4 ZThe 11-β hydroxylase deficiency may also result in
0 h7 ]/ G5 r& kexcessive adrenal androgen production, and rarely,
x% T6 c8 s' Fan adrenal tumor may also cause adrenal androgen
7 r$ [6 g7 T8 `% N# nexcess.1,39 o# J2 Q8 D6 n7 S9 Z: t' l$ @' v
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
( z6 X, i9 d' M4 M _ ], I' x542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
& n8 P" F, x, Q8 |5 W( K8 b# eA unique entity of male-limited gonadotropin-- ]8 \7 B" B; t
independent precocious puberty, which is also known( O1 C3 z" @# C: }9 u0 e3 C I
as testotoxicosis, may cause precocious puberty at a
: ^/ n0 C. D; M9 Q' A) Ivery young age. The physical findings in these boys$ j7 {/ N2 q: q/ d, n& G
with this disorder are full pubertal development,1 a+ P5 R" ^0 B+ s( y
including bilateral testicular growth, similar to boys
% s/ F' Q% G# v$ Wwith CPP. The gonadotropin levels in this disorder
" L7 l, G6 Y) ^7 _+ k$ Hare suppressed to prepubertal levels and do not show2 n3 k; ~6 C4 }6 H1 X+ | V
pubertal response of gonadotropin after gonadotropin-( M4 z6 B0 w8 A% m0 T+ ^
releasing hormone stimulation. This is a sex-linked
" K2 D9 ~6 I, Q& ]- |: i4 i5 P2 ~autosomal dominant disorder that affects only0 V& [+ C0 y% r" v: l7 z7 k
males; therefore, other male members of the family3 @, f/ v3 c: f, q0 m; H+ l
may have similar precocious puberty.3
/ N# P$ i% Y2 aIn our patient, physical examination was incon-3 U; D5 W+ D& @' B9 u
sistent with true precocious puberty since his testi-/ X3 w8 T, ]' n9 m
cles were prepubertal in size. However, testotoxicosis+ O R A S6 f" k& g' t3 I
was in the differential diagnosis because his father/ }; U2 y; k8 s& H
started puberty somewhat early, and occasionally,
* X- `3 _" F4 ^8 M; {testicular enlargement is not that evident in the6 d. V6 S& ~' B' f$ X6 ]
beginning of this process.1 In the absence of a neg-) e1 ^ o2 o+ z1 O5 M8 o
ative initial history of androgen exposure, our
; Q8 A9 ^. b7 v, v- Obiggest concern was virilizing adrenal hyperplasia,6 n/ ?* ]7 y/ m5 J- y
either 21-hydroxylase deficiency or 11-β hydroxylase( q x4 J1 n% P0 @
deficiency. Those diagnoses were excluded by find-& s; v+ _8 V7 z7 D9 B8 r% x
ing the normal level of adrenal steroids.
?7 N. X t( c6 bThe diagnosis of exogenous androgens was strongly
2 S7 o( V1 Q4 u. m& jsuspected in a follow-up visit after 4 months because
5 R! U8 N$ F( U' J, _; uthe physical examination revealed the complete disap-) a2 B8 |% B- R
pearance of pubic hair, normal growth velocity, and; K1 T% F/ c; o) N
decreased erections. The father admitted using a testos-
+ Y( a6 p3 P% z+ V8 u7 G# T# \6 p! tterone gel, which he concealed at first visit. He was
% \: e2 c4 U# d% ^$ N4 o, ausing it rather frequently, twice a day. The Physicians’
/ X, x+ L4 Y$ w# I+ R+ ?) gDesk Reference, or package insert of this product, gel or
) B) P- C; M2 J$ pcream, cautions about dermal testosterone transfer to1 v% J- A+ k+ T
unprotected females through direct skin exposure.: ~. }+ {0 y& V7 v, e! L
Serum testosterone level was found to be 2 times the8 e* Z% T5 v- t+ l
baseline value in those females who were exposed to
6 S0 g1 Z& Z4 P7 L, Y; \even 15 minutes of direct skin contact with their male, s9 I. F! J' S x) g
partners.6 However, when a shirt covered the applica-) D% W2 }* f. A. U) S
tion site, this testosterone transfer was prevented.* g2 h* Z* r& s; }
Our patient’s testosterone level was 60 ng/mL,( _7 a# T# ?4 v2 p# h
which was clearly high. Some studies suggest that( b) L/ w b* n! [3 @, j2 _
dermal conversion of testosterone to dihydrotestos-, z! M# z u ^+ F- N0 U
terone, which is a more potent metabolite, is more
5 ]1 P5 i9 r1 d$ Dactive in young children exposed to testosterone
1 e1 R; P5 c4 C; Aexogenously7; however, we did not measure a dihy-( k; i& ~5 y& D% N8 @8 ~
drotestosterone level in our patient. In addition to
& I T6 o s8 w$ t# evirilization, exposure to exogenous testosterone in
! t# ~) u' [* r4 z8 Q5 Qchildren results in an increase in growth velocity and6 z% x _3 [. m5 F1 g
advanced bone age, as seen in our patient.
. G1 H4 Q4 R/ Q" uThe long-term effect of androgen exposure during0 z1 Y, r5 C( w. G+ F- p w9 M/ H4 X, O9 _
early childhood on pubertal development and final
4 X: x3 H) Y' l8 radult height are not fully known and always remain
& c) }- A3 O7 pa concern. Children treated with short-term testos-
: W, w" F n* Rterone injection or topical androgen may exhibit some6 f% q. ?) Z5 D# f% Q2 T
acceleration of the skeletal maturation; however, after
0 W' X) i1 o7 m6 Tcessation of treatment, the rate of bone maturation1 M: k! _/ [ C, \/ ~3 U3 o
decelerates and gradually returns to normal.8,93 i. ]6 f: K+ W. h Z; {. S+ m
There are conflicting reports and controversy
( J* a9 s* I! L: M4 R0 R1 Mover the effect of early androgen exposure on adult6 W: [1 R0 y( R- w6 a1 x4 G
penile length.10,11 Some reports suggest subnormal) j# C+ H3 x0 s
adult penile length, apparently because of downreg-
+ r: |9 C0 o" G. g1 i L; Iulation of androgen receptor number.10,12 However,8 A$ f# s9 _5 W+ O/ E/ l) h1 m
Sutherland et al13 did not find a correlation between( ^: \7 j1 W6 g/ @7 u3 ?
childhood testosterone exposure and reduced adult
- H5 H) }% L) \3 M8 spenile length in clinical studies.1 M' ]) y. e8 V5 _; C/ E t" y
Nonetheless, we do not believe our patient is
. B" J/ t. B- jgoing to experience any of the untoward effects from
" f/ Y& \( H9 h/ u7 Ptestosterone exposure as mentioned earlier because
# ?* `; ^4 B m) u4 P, ythe exposure was not for a prolonged period of time.
# R6 G2 d: i0 ?1 {7 kAlthough the bone age was advanced at the time of8 p1 v0 B. \& F, A
diagnosis, the child had a normal growth velocity at
) T: l0 v8 Q+ B: s7 B4 L) mthe follow-up visit. It is hoped that his final adult
, B* K2 q+ }' A$ i1 zheight will not be affected.1 Z- L% l* m. Z" ^) ?
Although rarely reported, the widespread avail-
/ D# W5 |- _: ?3 l$ h, ?; ]ability of androgen products in our society may/ [2 B7 N) Z1 `; K- ?$ W5 _
indeed cause more virilization in male or female
: t( m' ]8 q% d3 q3 \children than one would realize. Exposure to andro-7 q+ }1 H- j5 B$ Z" q
gen products must be considered and specific ques-
4 I w, J6 R! W% wtioning about the use of a testosterone product or5 ^) n# m% X2 C9 _0 J; W8 H% G
gel should be asked of the family members during
& b0 W o) x8 D2 Z$ d' c( U- Q/ Othe evaluation of any children who present with vir-2 S" y! Y o+ Z- F
ilization or peripheral precocious puberty. The diag-2 N7 ]" n% k6 T
nosis can be established by just a few tests and by5 Y7 ]5 m8 d( [) u# m& r9 S$ B
appropriate history. The inability to obtain such a* v' v$ a- x1 g, S
history, or failure to ask the specific questions, may# D. r5 u: ~0 R5 e, q9 b
result in extensive, unnecessary, and expensive+ v. E8 X/ s* G- M+ _
investigation. The primary care physician should be$ Q* Y, h7 a1 v" f. R$ Q3 X
aware of this fact, because most of these children* M5 [+ J- a9 L
may initially present in their practice. The Physicians’
/ I( ?+ R: K% bDesk Reference and package insert should also put a: T/ o# G. y; |( D: _
warning about the virilizing effect on a male or1 n* H" k; |/ ^$ t K
female child who might come in contact with some-$ u) t0 h. j& n# R! V& i
one using any of these products.
, O5 \6 G* m5 M( QReferences. t9 }- j/ y; p( A5 w2 w
1. Styne DM. The testes: disorder of sexual differentiation; A6 j5 t& T S' b
and puberty in the male. In: Sperling MA, ed. Pediatric
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/ I2 b, c$ ?! I7 x$ F Y2 w, S2002: 565-628.! ~. y' n+ Z' q3 o# f6 n% y8 P$ f
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
$ \6 Q0 [/ _$ A! a1 W* R; Ypuberty in children with tumours of the suprasellar pineal
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3 ]: G. ]/ d3 h0 Z8 {5 NTopical Testosterone Exposure / Bhowmick et al 543
3 o9 c4 A' B8 _5 D: p8 [( Fareas: organic central precocious puberty. Acta Paediatr. l6 E; ?5 G$ X' @: a0 K3 \
2001;90:751-756.
% l9 C, f. y7 v, e3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
+ I1 { x; a$ m+ Y0 L* N g* v( tPediatric Endocrinology. 4th ed. New York, NY: Marcel
; F0 }9 @7 u1 ^/ o+ f: J3 vDekker Inc; 2003:211-238.8 ^" p& o7 W" w: |# J' @
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development in a two-year-old boy induced by topical
; K/ |& v3 [. `7 D. F" x+ {/ r* z1 |exposure to testosterone. Pediatrics. 1999;104:e23.* O# k$ o" k5 m1 g; a
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
6 i8 h7 _1 W8 _5 \7 q' \7 sSkeletal Development of the Hand and Wrist. 2nd ed.
2 y% i) A. |! J1 IStanford, CA: Stanford University Press; 1959.- x, B. t/ T' I& R& b' L8 N
6. Physicians’ Desk Reference. Androgel 1% testosterone,
4 {- \" t: \& d6 p+ G7 PUnimed Pharmaceutical Inc. Montvale, NJ: Medical5 d1 D- N _. k* P0 `$ Q+ Z
Economics Company, Inc; 2004:3239-3241.7 [* I7 @$ y- q, R$ V
7. Klugo RC, Cerny JC. Response of micropenis to topical' p+ h8 R2 X- q4 \6 J# f
testosterone and gonadotropin. J Urol. 1978;119:$ D% |+ I' {: r7 J6 A; m1 r
667-668.
" z/ Z0 H: B8 ^0 t7 d8. Guthrie RD, Smith DW, Graham CB. Testosterone
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