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is a significant concern for physicians. Central8 J q; O; ]# V4 h9 M- N6 G
precocious puberty (CPP), which is mediated/ c/ E [9 z: L
through the hypothalamic pituitary gonadal axis, has2 R" T, }. M$ A
a higher incidence of organic central nervous system) |) q2 |* c" B3 M
lesions in boys.1,2 Virilization in boys, as manifested
7 z% _& k9 I e5 P6 @; B9 cby enlargement of the penis, development of pubic9 k- J3 W* W+ a# m, C7 v
hair, and facial acne without enlargement of testi-
' H0 O7 @) L" v9 R. {* Bcles, suggests peripheral or pseudopuberty.1-3 We( I( X' ]8 i& S# d3 U; `
report a 16-month-old boy who presented with the
) C3 H) f- j$ q+ xenlargement of the phallus and pubic hair develop-
' R$ l- Y4 H& I* A. j9 S6 J2 g: {ment without testicular enlargement, which was due
8 p% A6 ?" m+ {$ U. [0 F% Eto the unintentional exposure to androgen gel used by
9 M( w( y0 V( U' W Vthe father. The family initially concealed this infor-* g& }8 t: b, m0 V
mation, resulting in an extensive work-up for this
, q( A' w M1 ]* q" Echild. Given the widespread and easy availability of
- r* X, h0 C9 d# ytestosterone gel and cream, we believe this is proba-& @4 e4 f" g+ s( l; [3 P
bly more common than the rare case report in the
+ E5 f( d: a+ }2 D8 u. n/ n- [! d, u4 {literature.4: m- @/ C) r) C; ?) H
Patient Report' e w4 N2 y+ `: h
A 16-month-old white child was referred to the- c: e5 u7 \; a' M5 v
endocrine clinic by his pediatrician with the concern, W* b3 F2 X* U' B- Y
of early sexual development. His mother noticed& K6 E& g! Q9 |. n# T) ^% n
light colored pubic hair development when he was- ?& a* L& r; R7 {- Q- ]
From the 1Division of Pediatric Endocrinology, 2University of6 X# v# p" X. m+ V- t. h
South Alabama Medical Center, Mobile, Alabama.$ ~ D# p* _* L+ \" o7 i' B
Address correspondence to: Samar K. Bhowmick, MD, FACE,1 r% x5 g7 d p1 ?3 M
Professor of Pediatrics, University of South Alabama, College of0 M; B2 l4 s$ S1 y0 `$ \! M% z5 }
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
0 [! A' v( ]% ~, K; H, j+ u6 ?# Ke-mail: [email protected].: x& s* X# J2 D
about 6 to 7 months old, which progressively became
+ y3 T4 b, j) S+ c+ U9 zdarker. She was also concerned about the enlarge-/ l. \$ w% }. x3 f* z
ment of his penis and frequent erections. The child' d0 m1 o3 e9 ]
was the product of a full-term normal delivery, with; H! R. H1 F5 w, g' o: e3 X
a birth weight of 7 lb 14 oz, and birth length of) p/ @& E5 [. @- D
20 inches. He was breast-fed throughout the first year8 S0 G6 V! R% Q. W
of life and was still receiving breast milk along with' T! Q+ x; R; c
solid food. He had no hospitalizations or surgery,0 R" b! Y& S# F; l1 A9 D1 F
and his psychosocial and psychomotor development; ^3 l! U- X; L) {1 W' }9 o( [; }; A
was age appropriate.0 a* \" B8 L% O& P; V
The family history was remarkable for the father,# p6 C# c- {+ q
who was diagnosed with hypothyroidism at age 16,4 H, k/ {" H. o0 B2 G- A' D6 z# ^8 U
which was treated with thyroxine. The father’s, |! e7 m6 G' U1 t$ i
height was 6 feet, and he went through a somewhat
+ _# B1 ?; l8 U2 b. gearly puberty and had stopped growing by age 14.* a* V# S! I8 W) _2 M$ t
The father denied taking any other medication. The
9 r* \. `. S: o- S( [+ W: U7 r, Uchild’s mother was in good health. Her menarche d4 [ Q$ g/ h+ O
was at 11 years of age, and her height was at 5 feet
% y$ l( g w- m% Y% }. W5 inches. There was no other family history of pre-& G2 m0 \1 }: _1 E. D6 }/ I q# P
cocious sexual development in the first-degree rela-
+ d! [$ i# g4 T3 K2 {tives. There were no siblings.5 U B+ P: {# s) x8 g
Physical Examination
% ^3 }- |# V9 X) ~7 {The physical examination revealed a very active,/ b( W2 [- J, f. `/ e
playful, and healthy boy. The vital signs documented
2 ^+ v, D- y5 ?9 i( o8 sa blood pressure of 85/50 mm Hg, his length was
+ g/ Q2 C* f: x0 b9 D1 f, y1 S) J; }90 cm (>97th percentile), and his weight was 14.4 kg4 I& E X, p+ U. ]3 O9 H$ R
(also >97th percentile). The observed yearly growth
' ^1 q$ d1 X7 w4 T* T p1 ~; Q! V& lvelocity was 30 cm (12 inches). The examination of2 I: C j1 S) O( P& s% u( X
the neck revealed no thyroid enlargement.
' g" J9 h; R. C. r) J% oThe genitourinary examination was remarkable for4 Q# N7 j Y2 C: t/ w" c
enlargement of the penis, with a stretched length of! @ f# H: H+ M" `+ d
8 cm and a width of 2 cm. The glans penis was very well' j" u, N' G1 \6 g0 H
developed. The pubic hair was Tanner II, mostly around+ q8 J9 ], J& ?( D
5407 |( s2 H+ P3 E! \9 W
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
$ [3 l+ I9 H: e6 {% K5 }7 Y* k) Gthe base of the phallus and was dark and curled. The. w' i4 A: p+ y2 @
testicular volume was prepubertal at 2 mL each.
# R8 R5 a/ ^, N: X! \The skin was moist and smooth and somewhat! |3 a1 O o2 b4 g
oily. No axillary hair was noted. There were no, F) W( D, ]* a9 R/ o6 x; A
abnormal skin pigmentations or café-au-lait spots.& ?- `' F1 a+ h/ ~
Neurologic evaluation showed deep tendon reflex 2+
, C" e' _: c- S3 w/ y! y6 T" u* A# Vbilateral and symmetrical. There was no suggestion
/ x. Z# v; w! l" [of papilledema.
' k* a- Z% O, h f; c8 `3 XLaboratory Evaluation
& v4 g* b0 A; X' eThe bone age was consistent with 28 months by
; {! ~4 S2 e* [( M$ X7 Qusing the standard of Greulich and Pyle at a chrono-
4 f9 @0 D( @0 ?8 [$ q' k( ~logic age of 16 months (advanced).5 Chromosomal( x A* s4 M2 e$ X( G
karyotype was 46XY. The thyroid function test
( ~, q3 h+ u# E4 o, r5 pshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
& ^5 Z' M4 ]9 Nlating hormone level was 1.3 µIU/mL (both normal).) [, p* k) D$ m4 j/ z" |' ^5 F- a
The concentrations of serum electrolytes, blood8 N3 F% Z' P! P5 c' W" v
urea nitrogen, creatinine, and calcium all were% C1 x. j: z, L
within normal range for his age. The concentration
$ }0 C+ |& I4 v4 o4 c6 Gof serum 17-hydroxyprogesterone was 16 ng/dL
% q" q6 N& H& H" G8 ~# G2 t% a(normal, 3 to 90 ng/dL), androstenedione was 207 d0 G& z* A8 f. Q( A
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
8 L( W4 O; r; u3 F; z+ _# D; wterone was 38 ng/dL (normal, 50 to 760 ng/dL),
# ?4 G$ B* d, i Vdesoxycorticosterone was 4.3 ng/dL (normal, 7 to" U! X7 a) R! c( Y7 e9 f2 N9 ^
49ng/dL), 11-desoxycortisol (specific compound S)
' ]1 Y0 ^1 b2 Ewas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
; x/ X( I, G4 F' |# r0 x" Ftisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total- a7 Q4 S O& `9 a
testosterone was 60 ng/dL (normal <3 to 10 ng/dL)," M, V, G& r. y" P6 ?
and β-human chorionic gonadotropin was less than" A& {$ a+ Z6 Y. ]" I$ b. g2 L
5 mIU/mL (normal <5 mIU/mL). Serum follicular" O) t, ]) {" J3 Q# }- K. O& Q& Y
stimulating hormone and leuteinizing hormone; Y! i3 \0 a0 B. }
concentrations were less than 0.05 mIU/mL
2 a' K7 z+ ?; u" T(prepubertal)." v% B. T* a+ Q, K+ n0 T4 |- @/ y1 t
The parents were notified about the laboratory
( ?' S1 F3 P8 P/ Q4 Aresults and were informed that all of the tests were# O) ]& d& Y& \# f
normal except the testosterone level was high. The
7 T# h1 s* V0 f. A! Y% H1 Yfollow-up visit was arranged within a few weeks to5 m0 u8 X# `: v% _) C1 c e' y
obtain testicular and abdominal sonograms; how-1 y+ y1 G7 j) }. R4 G
ever, the family did not return for 4 months.1 x# Z) n$ N* Q8 O3 g% {* s" H. U
Physical examination at this time revealed that the2 Q1 m1 ~3 }! v3 U2 S
child had grown 2.5 cm in 4 months and had gained, R9 a: @) V7 t2 d1 u/ k1 H' b
2 kg of weight. Physical examination remained* [7 A$ S) O/ u
unchanged. Surprisingly, the pubic hair almost com-
7 e v: l3 y) g Z0 w" n: g4 Bpletely disappeared except for a few vellous hairs at
8 E i" L; o3 J* P$ b5 m) M+ h; C5 Dthe base of the phallus. Testicular volume was still 2( B4 s9 Y1 g! @( A& K) J
mL, and the size of the penis remained unchanged.
7 u/ s. T+ ^+ U3 O3 D3 RThe mother also said that the boy was no longer hav-. B* u$ b3 ]9 T2 r- i* a2 k
ing frequent erections.
* r8 K, a7 F9 N3 q; i: y7 xBoth parents were again questioned about use of; h* o- t! \' c3 h. R; o2 i, K
any ointment/creams that they may have applied to. g% y- u+ t5 }
the child’s skin. This time the father admitted the
Y( |: h" X9 a f2 w+ JTopical Testosterone Exposure / Bhowmick et al 541& E, m+ {7 ~# P: J
use of testosterone gel twice daily that he was apply-& i( k7 A/ T+ e* Z x; P
ing over his own shoulders, chest, and back area for
" }8 M$ b8 L& |$ E: q. \a year. The father also revealed he was embarrassed
+ B4 X$ n5 \- i. C1 Qto disclose that he was using a testosterone gel pre-! o9 }. J( \6 w; d& p" k: |
scribed by his family physician for decreased libido C4 j6 H+ |1 O2 f
secondary to depression." p% X2 \! T* t1 [: e
The child slept in the same bed with parents.5 J- U6 W: y) Z* m' F
The father would hug the baby and hold him on his
5 m2 K$ Z* }- B5 f+ }8 z7 Mchest for a considerable period of time, causing sig-
9 I) \( {! H3 t3 W; B2 enificant bare skin contact between baby and father.
9 r& \: z! P d( G# _3 |5 cThe father also admitted that after the phone call,
7 y3 E0 @9 F" c3 dwhen he learned the testosterone level in the baby
4 d7 V1 X H- b4 w" bwas high, he then read the product information; j0 s0 |$ o/ ~" K
packet and concluded that it was most likely the rea-' X0 o- p7 V6 S0 ?/ `0 D% w
son for the child’s virilization. At that time, they/ W E4 e/ A- ]
decided to put the baby in a separate bed, and the
! n0 U6 @; q& n Tfather was not hugging him with bare skin and had4 O9 G+ u$ ^1 V4 ~4 b
been using protective clothing. A repeat testosterone
. X+ p ~* M7 R: H) Z) y* _! g- W2 Jtest was ordered, but the family did not go to the8 d3 F! [: v) X! h$ ]# F5 s
laboratory to obtain the test.
( X6 G% f6 E( @2 v* hDiscussion9 a7 C* J0 l8 k' O, {$ `9 z
Precocious puberty in boys is defined as secondary
- k' k$ \" C- S& w8 \- C" k7 Fsexual development before 9 years of age.1,4) ~+ E: {+ a1 B
Precocious puberty is termed as central (true) when$ B/ t" G$ t/ x6 J# f" i( p
it is caused by the premature activation of hypo-
1 j+ L/ w) {2 F' M4 ^thalamic pituitary gonadal axis. CPP is more com-; z8 ]2 @6 r! }/ C
mon in girls than in boys.1,3 Most boys with CPP% I) j: M$ U8 D' Y6 {, c
may have a central nervous system lesion that is* a0 U2 U4 Y: j& `* l+ I/ i8 L
responsible for the early activation of the hypothal-) Z- Z* |2 b2 [$ l0 k/ Q: V; E0 B
amic pituitary gonadal axis.1-3 Thus, greater empha-
u' s- |( _& F N5 n& Y& s+ k7 n" l2 Isis has been given to neuroradiologic imaging in M# M* M* S3 A+ l; |" {
boys with precocious puberty. In addition to viril-7 J2 V6 d9 k) _" A5 E1 S
ization, the clinical hallmark of CPP is the symmet-' t+ e9 s# T. r3 R- @
rical testicular growth secondary to stimulation by. c- \, E+ i. q
gonadotropins.1,3) f) a o8 M- `
Gonadotropin-independent peripheral preco-7 L! I4 c8 J! N' |. `3 W; ]
cious puberty in boys also results from inappropriate6 ~5 @7 j& X" ?. ~ X; ]5 e1 b
androgenic stimulation from either endogenous or, k, _" Z1 u5 H. p
exogenous sources, nonpituitary gonadotropin stim-
. h" G8 g1 d3 B$ n3 z: J& P7 @ulation, and rare activating mutations.3 Virilizing
( V- B# q( a2 j5 fcongenital adrenal hyperplasia producing excessive7 x9 D, [, y+ J! T1 N9 Z
adrenal androgens is a common cause of precocious3 Q) N8 ~; ?4 d2 x
puberty in boys.3,4
( V$ \) e% M0 _: ]& `1 F. _( uThe most common form of congenital adrenal
# A% S. d! P: X; g- \( ehyperplasia is the 21-hydroxylase enzyme deficiency.2 y) Y; K* p* k. d9 Z( M6 F
The 11-β hydroxylase deficiency may also result in
) J* f1 A9 K& p9 U5 @9 f& Dexcessive adrenal androgen production, and rarely,
7 P/ x/ ]9 m5 Tan adrenal tumor may also cause adrenal androgen
& T! B5 \: Q. I- t$ {$ f% qexcess.1,3* S2 c q5 y! b7 B% t8 ?
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
- B3 K! |% t/ ^, d) O& o( j542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 j. h% d ^' ~( \/ g: ]( Q8 N
A unique entity of male-limited gonadotropin-
" o I) q4 V9 b. |* W, Z+ d4 ?2 Xindependent precocious puberty, which is also known
+ \5 R, h0 O6 J3 M8 _+ h2 [as testotoxicosis, may cause precocious puberty at a
. A2 v' |0 w L0 e6 Overy young age. The physical findings in these boys
" Y8 ?$ w/ j# f1 N6 Kwith this disorder are full pubertal development,# N1 |# `9 h+ ]
including bilateral testicular growth, similar to boys5 X9 }! ]0 P" p8 M
with CPP. The gonadotropin levels in this disorder
" \+ m9 F2 G; W+ S6 A& G x Bare suppressed to prepubertal levels and do not show: f' |# V. |/ V2 Z I: m
pubertal response of gonadotropin after gonadotropin-: A& n( g- \2 y6 N8 }; K+ k) ]2 F
releasing hormone stimulation. This is a sex-linked, T- p7 h1 T7 M8 l% X' H
autosomal dominant disorder that affects only9 B: `6 ?/ p0 j& e0 g
males; therefore, other male members of the family# w/ k6 Q* ~' `1 W1 J$ ]$ }
may have similar precocious puberty.3
, j! ]$ R j$ _& n6 EIn our patient, physical examination was incon-
& O; X% i. N/ a4 `8 isistent with true precocious puberty since his testi-+ B3 F9 S& k+ H* c5 S P
cles were prepubertal in size. However, testotoxicosis
2 z4 N& q8 W% L0 jwas in the differential diagnosis because his father% r( y6 j$ t3 U& z2 A5 X$ O) x
started puberty somewhat early, and occasionally,
+ E ~. d. K# t3 k1 ]; wtesticular enlargement is not that evident in the9 a: Z4 H& P( P5 o
beginning of this process.1 In the absence of a neg-
; U/ \7 X0 X$ u( W8 f1 A8 i$ Tative initial history of androgen exposure, our, ~; `2 \' i8 G0 L1 z0 `# o- t
biggest concern was virilizing adrenal hyperplasia,* q, L, s( h- H% ^) A3 h+ M; H
either 21-hydroxylase deficiency or 11-β hydroxylase8 a3 u" d$ |& z) b
deficiency. Those diagnoses were excluded by find-
; |* P# Y- _1 B2 b) {! jing the normal level of adrenal steroids.4 C s: M& m) g' \
The diagnosis of exogenous androgens was strongly
9 U! |2 P' x0 F3 t5 v2 Isuspected in a follow-up visit after 4 months because
% \; C4 B5 p1 B& ]. ?the physical examination revealed the complete disap-2 D& R0 Q1 B! P
pearance of pubic hair, normal growth velocity, and
: F9 m3 V& u8 }( f9 ]2 z5 |3 ]decreased erections. The father admitted using a testos-
0 x" P4 z! y- E' I9 fterone gel, which he concealed at first visit. He was
' Y* L, C3 |. a6 T0 V/ \7 {using it rather frequently, twice a day. The Physicians’& F [, w& c b4 N0 j
Desk Reference, or package insert of this product, gel or
: M- H8 O7 q8 ~( A, wcream, cautions about dermal testosterone transfer to
1 F6 x( z1 |7 N; Kunprotected females through direct skin exposure.' i% a, o, X, C7 ^5 h0 x
Serum testosterone level was found to be 2 times the7 h+ i z; R U
baseline value in those females who were exposed to
. ]$ P. C. O+ d0 Xeven 15 minutes of direct skin contact with their male
! e! j0 x9 ?, F1 y0 d) [5 Dpartners.6 However, when a shirt covered the applica-6 q0 R- d! b7 t, k% j
tion site, this testosterone transfer was prevented.
' t! t, K* X6 E1 T) x7 vOur patient’s testosterone level was 60 ng/mL,& y/ z' c5 u" T# l; N" t9 t* A2 k
which was clearly high. Some studies suggest that1 H8 p2 ` j" _. q# o$ I9 D, e/ J& V
dermal conversion of testosterone to dihydrotestos-* @6 {# T+ N' T9 O( [0 L. l9 w
terone, which is a more potent metabolite, is more6 K7 p1 _6 S) z: J9 {
active in young children exposed to testosterone% B4 _8 |$ K6 N( ?
exogenously7; however, we did not measure a dihy-
. ^' }, |% I- I* _1 Odrotestosterone level in our patient. In addition to1 b. e) |/ v& `% g( F) |
virilization, exposure to exogenous testosterone in
8 ?1 z f. Q& z& Q9 hchildren results in an increase in growth velocity and
' w; f3 X, Z/ I- |; k- O0 Padvanced bone age, as seen in our patient.! d6 F9 A; L$ Q% w j
The long-term effect of androgen exposure during x8 x* Y( w& t4 e d" J, p$ _, }
early childhood on pubertal development and final9 J" i* r' Y$ _8 o% ^
adult height are not fully known and always remain
7 r* \ K5 Y* ~) W Ga concern. Children treated with short-term testos-
3 l$ I. W, k7 a' [terone injection or topical androgen may exhibit some
) V( ]3 b! D' wacceleration of the skeletal maturation; however, after. @& O1 g% B6 A( W$ y3 q! {
cessation of treatment, the rate of bone maturation
) O2 Y s8 Q$ \- xdecelerates and gradually returns to normal.8,9" F: c. m' B% C, ?+ y6 o
There are conflicting reports and controversy+ q6 _% T2 t' {9 U
over the effect of early androgen exposure on adult
+ ^! C6 d3 M* p' ~" `penile length.10,11 Some reports suggest subnormal
r8 |2 k, m3 e" j6 Y4 x3 Padult penile length, apparently because of downreg-7 h. j+ W7 ^) K# ~6 Y+ G
ulation of androgen receptor number.10,12 However,3 Y5 P2 I1 |: ]" C
Sutherland et al13 did not find a correlation between
" E; `/ @' T2 c4 Z$ R* Dchildhood testosterone exposure and reduced adult, F; o3 A: f# ~& ?& s8 O* d
penile length in clinical studies.! m" Y$ k8 c$ X8 L$ R3 d) _2 s
Nonetheless, we do not believe our patient is; A" z8 {0 K/ Q+ n, p
going to experience any of the untoward effects from& g5 K' k1 ?1 R- D' n9 C
testosterone exposure as mentioned earlier because4 K9 ]' q k5 t0 k
the exposure was not for a prolonged period of time.
; Y8 j2 M. n- q# y8 l a# WAlthough the bone age was advanced at the time of2 j! s' s& A* z. v, A
diagnosis, the child had a normal growth velocity at
0 A, \* e3 M. {: b; ^/ {the follow-up visit. It is hoped that his final adult
( v* o6 _! r9 G: N* `/ @height will not be affected.+ t F9 s# _9 L3 Y+ H- s6 E l
Although rarely reported, the widespread avail-* J- P- m. K8 A, _7 j
ability of androgen products in our society may5 X: t2 w/ N+ A ?& w
indeed cause more virilization in male or female
9 A0 ^5 }) M$ ?: Y% B. v! I0 p8 Cchildren than one would realize. Exposure to andro-
7 `3 E, T4 p6 z2 M- i2 |gen products must be considered and specific ques-) i+ m6 x/ Z- L1 \- \3 T& @
tioning about the use of a testosterone product or- y5 s, `8 U o3 C1 |& K
gel should be asked of the family members during$ A; i% J* y# n* ]1 L% `) F1 y" Z1 G
the evaluation of any children who present with vir-
- Z$ ~ R( S' g7 Gilization or peripheral precocious puberty. The diag-: B9 P: {# H8 \+ g
nosis can be established by just a few tests and by
7 l, I& K, ?4 b4 Y% T$ Uappropriate history. The inability to obtain such a
8 q% z1 a5 ^2 d) J( z; Whistory, or failure to ask the specific questions, may3 ^% S: d" _/ D! Q# l) r
result in extensive, unnecessary, and expensive3 b# [- C, u; v; x4 @" y; h' p
investigation. The primary care physician should be- n7 K& M' F) T3 W6 }% }
aware of this fact, because most of these children, N5 t4 a& W4 I1 w4 p$ w6 f7 W- i
may initially present in their practice. The Physicians’
$ X7 l6 U3 S4 s0 x, h$ tDesk Reference and package insert should also put a
* g8 I9 ^' T) Uwarning about the virilizing effect on a male or3 v1 \6 u( i- D# Q7 A8 r
female child who might come in contact with some-/ ^* @: c4 p/ ?( _' j |
one using any of these products.4 f+ R1 {8 N' r3 ^
References
! [ o, k- I) @2 J' Y1. Styne DM. The testes: disorder of sexual differentiation
+ g) K, H D8 e9 dand puberty in the male. In: Sperling MA, ed. Pediatric" i4 O: w* J; o; ]9 e
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;. h, x& J5 ?$ ^7 k8 P) G
2002: 565-628.. A" c1 d! G* X7 R9 _" E" v, m
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
0 M+ e, ^+ K/ K' J$ m" Qpuberty in children with tumours of the suprasellar pineal( k( | U0 x6 F+ N7 ?! d. ?
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Topical Testosterone Exposure / Bhowmick et al 543( C5 i* F0 H! q
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2001;90:751-756./ w$ H& g% [2 \ p% A5 F+ M% S
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
6 f" I' V [/ o, C! r4 lPediatric Endocrinology. 4th ed. New York, NY: Marcel
7 Z; E9 p" K1 I( v5 ]9 ~Dekker Inc; 2003:211-238., V' i, }9 {' O2 @
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual6 i1 e$ l% `' o5 N- i
development in a two-year-old boy induced by topical; v" Z" C7 A# A4 M( [
exposure to testosterone. Pediatrics. 1999;104:e23.
2 E7 c" Q* l( J1 _- F5. Greulich WW, Pyle SI, eds. Radiographic Atlas of- l! h0 C+ c6 Q6 w" ^* J# y
Skeletal Development of the Hand and Wrist. 2nd ed.
, m7 N1 A* r& _9 M5 Y& B! f O% l! HStanford, CA: Stanford University Press; 1959.. [ X2 Y8 G2 l1 ^3 S5 k
6. Physicians’ Desk Reference. Androgel 1% testosterone,) d5 ]% ?/ N6 x2 g' r8 d
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
! t) {: X; q$ f- MEconomics Company, Inc; 2004:3239-3241.. [9 x8 E1 {6 R! H6 T3 P9 ^
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