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is a significant concern for physicians. Central
, C( {* E* z5 [precocious puberty (CPP), which is mediated) E8 }/ n1 D1 R! P/ K$ \& B
through the hypothalamic pituitary gonadal axis, has
* ], Q& n" ^5 qa higher incidence of organic central nervous system$ Y/ A) W& [) I! m; y7 h
lesions in boys.1,2 Virilization in boys, as manifested
2 c" F5 B' X% y2 U7 yby enlargement of the penis, development of pubic) F; z# T; U# h( l8 Y/ r; E
hair, and facial acne without enlargement of testi-/ e( ~) p" V l7 E2 I: v
cles, suggests peripheral or pseudopuberty.1-3 We$ G$ d8 Q0 t4 d( N8 A/ V- J; g
report a 16-month-old boy who presented with the' C1 f3 T$ `& `! U; j( }
enlargement of the phallus and pubic hair develop-) C, x$ z2 q7 f
ment without testicular enlargement, which was due2 k( c/ Q' g" K. |5 {5 r j
to the unintentional exposure to androgen gel used by/ Z5 z6 D; w3 |) O& ]
the father. The family initially concealed this infor-0 ]9 y+ Z# U W: L" O9 j
mation, resulting in an extensive work-up for this
5 L9 m; `! F$ @$ f. E) D9 k5 H! bchild. Given the widespread and easy availability of @ |* j/ _3 ?& P8 z
testosterone gel and cream, we believe this is proba-/ P5 y) N4 a' y5 M" o
bly more common than the rare case report in the, d3 a' W9 L7 l: j$ h
literature.4
) B: _) C$ v/ p( Q/ x2 h- @: \3 [Patient Report6 W9 }( \6 L- J+ b8 w) [
A 16-month-old white child was referred to the
4 o# r! k2 u" c1 T; T/ L: Fendocrine clinic by his pediatrician with the concern$ Y7 j4 m* p( T
of early sexual development. His mother noticed$ B: U; F0 O& m2 G8 x2 Y
light colored pubic hair development when he was
- \2 W+ O# P4 i1 Q4 e" z" [From the 1Division of Pediatric Endocrinology, 2University of
) R+ X$ ?! b5 i g" tSouth Alabama Medical Center, Mobile, Alabama.
n6 n+ H. H+ u( B- b0 BAddress correspondence to: Samar K. Bhowmick, MD, FACE,
0 _" J4 U5 g4 y! S w- cProfessor of Pediatrics, University of South Alabama, College of
$ M. A$ m) G% M! r# F% g" d1 mMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;3 N: s- m( b1 O1 R6 R4 l5 W6 P" |+ `
e-mail: [email protected].
# q, J' }& @$ q6 e3 Oabout 6 to 7 months old, which progressively became
7 b* o7 [/ N# ~1 Ldarker. She was also concerned about the enlarge-
1 a3 g6 T$ q: ]4 A, V% Pment of his penis and frequent erections. The child
. E- `" G r2 q7 T" swas the product of a full-term normal delivery, with; y# H/ S* T- G; {+ [' U% Y
a birth weight of 7 lb 14 oz, and birth length of# y: l8 j! Q6 y) `# i3 v7 l
20 inches. He was breast-fed throughout the first year
; g$ V$ b* [6 a( Fof life and was still receiving breast milk along with
. T$ s& N+ t* m* x: i" I. m$ j dsolid food. He had no hospitalizations or surgery,
4 R. D+ Y$ g& Oand his psychosocial and psychomotor development- t; S4 {" p" b" `
was age appropriate.5 N6 E& @8 m1 z4 w
The family history was remarkable for the father,
) D- F- V3 C9 b! ]: |8 d& xwho was diagnosed with hypothyroidism at age 16,
4 e* D; h" L! p# R3 v+ }' \& n& b! {which was treated with thyroxine. The father’s: Z$ h. }. ]. H% e% i3 v& V
height was 6 feet, and he went through a somewhat: J' t- F( I8 r4 f6 N% V
early puberty and had stopped growing by age 14.! M; x2 c( p J8 |1 H
The father denied taking any other medication. The6 Z& i' q0 k# ]
child’s mother was in good health. Her menarche; y: }/ x Q& h/ X1 J* l
was at 11 years of age, and her height was at 5 feet
8 a2 e" L( |7 x7 } J5 inches. There was no other family history of pre-, |4 l! S6 g- j9 C
cocious sexual development in the first-degree rela-
' ]7 l/ V+ }# @8 Stives. There were no siblings./ y3 D( R- K8 }4 z2 K/ D- r
Physical Examination
% r: f' N ~3 R, \" yThe physical examination revealed a very active,
. N# ?0 u, q/ S: y( _5 ]playful, and healthy boy. The vital signs documented5 y5 x2 C; c/ R
a blood pressure of 85/50 mm Hg, his length was4 Y5 x* P1 y8 ^5 e6 D/ q0 x7 z8 P
90 cm (>97th percentile), and his weight was 14.4 kg
: j1 c% z r" \3 w2 d* n+ ~(also >97th percentile). The observed yearly growth
) _ f2 x6 T- T1 avelocity was 30 cm (12 inches). The examination of) l* Q& ^# G5 ?% {3 s8 |$ X" ^
the neck revealed no thyroid enlargement.0 m3 L% f# u8 v8 E. H
The genitourinary examination was remarkable for
% O% ^3 k1 C+ F4 t! b0 Cenlargement of the penis, with a stretched length of; K; ?6 w, {7 N* e1 o" c
8 cm and a width of 2 cm. The glans penis was very well
2 t1 O9 p9 o4 t; G) J; @* Rdeveloped. The pubic hair was Tanner II, mostly around
+ |" j" w$ ^7 T4 v( Z8 E' [540
9 F# O! S" s$ v& ~6 g4 A( eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
$ ^4 y; D5 v; x+ g7 E( Hthe base of the phallus and was dark and curled. The
" j; \& O8 g3 W3 htesticular volume was prepubertal at 2 mL each.
4 N; i2 }+ m# x- _# V7 M H; ]The skin was moist and smooth and somewhat
% H$ m' n, k1 D1 Boily. No axillary hair was noted. There were no) }: U6 u1 e: W* H$ d: p
abnormal skin pigmentations or café-au-lait spots.
7 N) B9 @; r- F" }/ R% uNeurologic evaluation showed deep tendon reflex 2+: g% E+ N0 y7 L, s4 E! @; U
bilateral and symmetrical. There was no suggestion( ]7 _7 M7 Q1 }! o$ Z' n+ P
of papilledema." o2 m: q" L& c6 C3 C! a& _
Laboratory Evaluation3 S7 [ b( R/ d% a$ N+ E
The bone age was consistent with 28 months by
5 n% x9 _1 }0 d4 K5 p& [! z, jusing the standard of Greulich and Pyle at a chrono-
. n5 l0 U \3 y& h1 U) e8 h5 u0 f: alogic age of 16 months (advanced).5 Chromosomal, {! i \7 V" I/ e: M% e/ Z% T
karyotype was 46XY. The thyroid function test9 p4 C. E6 t1 g; `3 A
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
. K- N# t% W3 N) O; Flating hormone level was 1.3 µIU/mL (both normal).: i. A4 J& Z1 p2 [8 `
The concentrations of serum electrolytes, blood) x+ s' W1 m% K; N- k2 W% u
urea nitrogen, creatinine, and calcium all were2 s4 y) j! e& X# z! } B$ ]
within normal range for his age. The concentration$ [ Z7 s( o" `& c* |3 n
of serum 17-hydroxyprogesterone was 16 ng/dL# Y! k* ^( y. o3 G( d: [7 `% N
(normal, 3 to 90 ng/dL), androstenedione was 20
5 D: e- D* l! R3 S! r5 Xng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
) `8 S0 h4 t ]1 G o1 J; lterone was 38 ng/dL (normal, 50 to 760 ng/dL),
: l- b p& x! r! bdesoxycorticosterone was 4.3 ng/dL (normal, 7 to U) m* ^, I8 Y9 k
49ng/dL), 11-desoxycortisol (specific compound S)3 o& ^# q" q. u" }4 I
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-5 N8 X. L9 q" P$ b
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total/ K6 T! x3 F) V: h. N9 y7 M. o3 `
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),7 U" y; o; p5 d$ G
and β-human chorionic gonadotropin was less than" F, v$ M+ o% ^- e- s
5 mIU/mL (normal <5 mIU/mL). Serum follicular
( n6 N1 G$ O9 |5 astimulating hormone and leuteinizing hormone: R3 U3 y1 }- Z0 w# c; w
concentrations were less than 0.05 mIU/mL
& x% G& O _2 Z6 }8 d(prepubertal).
+ T& T6 Y7 w% S- ]9 V% pThe parents were notified about the laboratory5 S2 j+ x% P7 l9 d1 U
results and were informed that all of the tests were2 B# Z' i, ^/ P" X+ X4 w
normal except the testosterone level was high. The
/ t2 |4 F- Y0 k$ Q) bfollow-up visit was arranged within a few weeks to
7 t$ N6 ~7 x1 }8 ^3 Pobtain testicular and abdominal sonograms; how-
, D7 q1 M% t R8 I# e& _ever, the family did not return for 4 months.
% e2 j3 f: g# yPhysical examination at this time revealed that the
2 C+ j. C+ x4 J5 E- l/ D1 e/ o5 ]child had grown 2.5 cm in 4 months and had gained/ `2 }8 U( u* R4 z, `
2 kg of weight. Physical examination remained
" `5 G. q9 N; T& W* u1 _unchanged. Surprisingly, the pubic hair almost com-) {# J" R- U! E& D8 Y
pletely disappeared except for a few vellous hairs at; h0 _2 Y0 G% }+ C
the base of the phallus. Testicular volume was still 2( X4 z" L+ ?; C8 N
mL, and the size of the penis remained unchanged.
0 z; G' ]. k( X# b" {/ J" AThe mother also said that the boy was no longer hav-4 X/ Q9 U2 F- f |8 N$ Z
ing frequent erections.( `) N# r* J4 v$ f) B+ p# D
Both parents were again questioned about use of
$ Z# i! [# i# ?5 s- u( g. \; fany ointment/creams that they may have applied to
8 u% @2 c2 Z; v; ^1 i4 _the child’s skin. This time the father admitted the: {8 Z6 Z4 k- |, r# R m$ A, @
Topical Testosterone Exposure / Bhowmick et al 5413 r) j& R+ D2 \9 _
use of testosterone gel twice daily that he was apply-
; M/ R, [5 R3 O" Y- x0 h% K9 O0 \& bing over his own shoulders, chest, and back area for* J! Y% t8 t$ H
a year. The father also revealed he was embarrassed, N- k$ w" u j- s
to disclose that he was using a testosterone gel pre-
9 S5 h3 h; i p2 p; j3 Z b0 {* ^scribed by his family physician for decreased libido. H2 y7 G/ p; v" W/ ^: V
secondary to depression.$ Y. Z2 T. @0 ?9 z0 e1 B4 T, |
The child slept in the same bed with parents.$ w8 X& Z! Z% [* W3 R
The father would hug the baby and hold him on his
1 @: N) v' Z R9 X9 jchest for a considerable period of time, causing sig-
3 O- {7 b! c* E2 Dnificant bare skin contact between baby and father.1 e6 |- \$ l4 c9 m1 ]# q$ h
The father also admitted that after the phone call,
2 r) x" W4 f1 q6 I9 P7 j! lwhen he learned the testosterone level in the baby
L# R: q4 W. O6 W" a2 dwas high, he then read the product information! X# {0 q9 a; ?$ q% I$ [
packet and concluded that it was most likely the rea-
' X# ?& x9 F ~( R( Sson for the child’s virilization. At that time, they2 V' \1 H1 ~0 ? c, P
decided to put the baby in a separate bed, and the) a& g" ]7 n$ V2 U+ r2 C
father was not hugging him with bare skin and had
( I# I: Q7 w: N( @' J G: }+ R9 _been using protective clothing. A repeat testosterone
9 H" a x% P5 l( t, ?! e6 [test was ordered, but the family did not go to the
/ r" s5 e0 Y% S" v& Ulaboratory to obtain the test.( v b S% X3 J: j' b' c4 k
Discussion
/ s- R) I2 g! X0 U f; g6 JPrecocious puberty in boys is defined as secondary
" J2 _4 P, }) H9 |sexual development before 9 years of age.1,4" d8 V/ a/ N, \/ x5 f) H
Precocious puberty is termed as central (true) when
# _$ [: @* p7 Q! S, Tit is caused by the premature activation of hypo-
7 Z1 Z" y; ^8 D5 b" A" Z) hthalamic pituitary gonadal axis. CPP is more com-
. @7 I5 R4 _7 _6 F4 `mon in girls than in boys.1,3 Most boys with CPP a0 f& }8 Q# L- x! G$ a
may have a central nervous system lesion that is
$ B- j* U9 |9 f! G, |) Fresponsible for the early activation of the hypothal-
, F2 a2 ]! T5 z/ J& Famic pituitary gonadal axis.1-3 Thus, greater empha-
! d( A+ U: Z# h6 H1 h: e9 P( M* wsis has been given to neuroradiologic imaging in3 `# Q# Y0 U2 L1 r# i5 F
boys with precocious puberty. In addition to viril-" q( E7 H& t: f' D. s3 y
ization, the clinical hallmark of CPP is the symmet-
; T. c4 a X) [( {- c! X& Vrical testicular growth secondary to stimulation by+ Q# |* p/ D' I
gonadotropins.1,3# L0 x5 Q% ?1 B* q9 {: u; p
Gonadotropin-independent peripheral preco-( i- R$ j$ R. e. ]8 X5 |) ^1 U9 v
cious puberty in boys also results from inappropriate
, ]- f, P5 X2 b. R0 x8 sandrogenic stimulation from either endogenous or6 Q5 d% b, f e, K0 R
exogenous sources, nonpituitary gonadotropin stim-& \8 F. J8 u& O1 b5 D3 Z
ulation, and rare activating mutations.3 Virilizing
! d0 @9 S. V7 T, b( y( H5 F. X% }: Acongenital adrenal hyperplasia producing excessive8 W6 I- W, R4 ]* r B
adrenal androgens is a common cause of precocious' O4 o' b& c5 B5 u0 J2 w1 r
puberty in boys.3,4
7 [7 u: F4 S: E8 R% A! ^- D& xThe most common form of congenital adrenal& d9 P# s) C. n% P, `
hyperplasia is the 21-hydroxylase enzyme deficiency.* O" P+ u' v& G `1 W% Y( F3 v4 k: p
The 11-β hydroxylase deficiency may also result in
7 M3 `) d5 }) I. @excessive adrenal androgen production, and rarely,
. f: r2 A- }+ V: {! Kan adrenal tumor may also cause adrenal androgen2 w; w W% U+ n8 H) a D, z
excess.1,37 S+ K8 G0 I* }
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( O9 m5 B3 E8 ~
542 Clinical Pediatrics / Vol. 46, No. 6, July 20078 b; j' K- G4 G! V" _
A unique entity of male-limited gonadotropin-
) Q3 z+ ?, c; ]& {independent precocious puberty, which is also known5 I9 [) J4 f6 d9 s2 z( l! t
as testotoxicosis, may cause precocious puberty at a9 D$ V9 `! J' O; k( i
very young age. The physical findings in these boys0 ^- X5 m& R; P' F$ r
with this disorder are full pubertal development,* c" @% D- z5 u
including bilateral testicular growth, similar to boys
% j3 U, K2 @( `$ B7 z" vwith CPP. The gonadotropin levels in this disorder2 Z d0 e2 r1 P) E% W$ t
are suppressed to prepubertal levels and do not show( R) n/ [2 h' e: L' K, o& s, o
pubertal response of gonadotropin after gonadotropin-* B* m4 v( ]: E
releasing hormone stimulation. This is a sex-linked
4 p8 v7 g* r4 ]; u1 U6 }autosomal dominant disorder that affects only
- l, s" w8 r* v6 t$ E5 nmales; therefore, other male members of the family1 A* ]% ^2 \1 Y5 T `+ u
may have similar precocious puberty.3
9 h, i& j1 L7 m$ ^; JIn our patient, physical examination was incon-8 q/ O/ q0 [; o. y
sistent with true precocious puberty since his testi-
/ r, @+ G5 T1 I+ G Ccles were prepubertal in size. However, testotoxicosis7 {+ p4 K: ^0 d9 s$ ^
was in the differential diagnosis because his father+ w/ @$ F$ `- R2 F6 A0 T
started puberty somewhat early, and occasionally,. p+ g( t8 R7 @' R
testicular enlargement is not that evident in the* ?6 P5 ]" C" A# d1 j1 j0 s, y
beginning of this process.1 In the absence of a neg-- o: D6 L, ^2 u2 B- [. U+ Y) y7 O
ative initial history of androgen exposure, our
( g7 Q" Y/ B( l' e0 |7 z3 t' z) hbiggest concern was virilizing adrenal hyperplasia,- }3 k, T) K; ]- a/ J
either 21-hydroxylase deficiency or 11-β hydroxylase, _6 A3 K8 Q1 ^
deficiency. Those diagnoses were excluded by find-# M0 ]9 M) b2 G$ e+ u, l) {) x
ing the normal level of adrenal steroids.( p1 a+ M0 o' O: _, i
The diagnosis of exogenous androgens was strongly9 Y* d& `" ~" V, H2 b; s
suspected in a follow-up visit after 4 months because! h* Y' x, ]) D* Q0 k7 G$ X! y' b
the physical examination revealed the complete disap-: J0 T3 G4 J# u. o* D, [* U
pearance of pubic hair, normal growth velocity, and
! f' n+ O- L/ p2 ddecreased erections. The father admitted using a testos-/ w* ^7 W9 |( \
terone gel, which he concealed at first visit. He was! q# ]( q( ?8 X. o$ H0 K
using it rather frequently, twice a day. The Physicians’
% q+ S3 `. _8 Z8 ^Desk Reference, or package insert of this product, gel or2 v+ e7 ]0 j% j- f$ H& F( n
cream, cautions about dermal testosterone transfer to
' T& x ?) V2 S) J6 Punprotected females through direct skin exposure.8 w: {& `! ?" d" p" o6 {+ P9 `& f! Q7 G
Serum testosterone level was found to be 2 times the W5 m# K0 R& A: h& E- r8 a7 k
baseline value in those females who were exposed to5 V* X$ g% Q( u% K1 g
even 15 minutes of direct skin contact with their male
4 P3 B3 i6 L$ q# Q- j% p6 kpartners.6 However, when a shirt covered the applica-
6 h. a0 b9 c- {5 Vtion site, this testosterone transfer was prevented.6 F5 [* \5 W, J) n# m9 M$ s
Our patient’s testosterone level was 60 ng/mL,2 O; f) \; V8 A S! P
which was clearly high. Some studies suggest that
( ]1 ~/ G0 R$ v1 i' \dermal conversion of testosterone to dihydrotestos-1 [6 a _: `8 X6 N) n
terone, which is a more potent metabolite, is more/ {% ], k9 O) K6 t+ A
active in young children exposed to testosterone0 I* t0 i$ r8 Z# O$ `
exogenously7; however, we did not measure a dihy-
9 Z. E3 z' k9 S; ~drotestosterone level in our patient. In addition to: h7 f: j' R W8 w' S! J# D3 r8 t
virilization, exposure to exogenous testosterone in
& p4 d9 t3 g% L1 w2 \children results in an increase in growth velocity and$ Y8 h9 d, C5 N4 D' W& \
advanced bone age, as seen in our patient.
# d" e. c' t8 M. w/ o* ^: z: pThe long-term effect of androgen exposure during
7 e* m* b; O! a% v% wearly childhood on pubertal development and final
$ \0 U' w; E* K+ V' qadult height are not fully known and always remain
5 H1 {+ ~3 [/ J+ F2 P0 Ua concern. Children treated with short-term testos-# C _9 c) a$ ?: |2 r
terone injection or topical androgen may exhibit some
$ S3 g' d9 h% a9 [4 Uacceleration of the skeletal maturation; however, after: d# s6 G( |: R+ I+ y7 S
cessation of treatment, the rate of bone maturation
" W1 \ }2 s2 v' sdecelerates and gradually returns to normal.8,9
0 w6 q, a5 |: A3 lThere are conflicting reports and controversy
" I ]* ]! c/ Cover the effect of early androgen exposure on adult9 s9 O; E1 Q7 u, g/ n8 i2 S
penile length.10,11 Some reports suggest subnormal
: u8 u; Y: {" e' g# C5 k, o4 Vadult penile length, apparently because of downreg-
! i6 r$ F I" G1 D5 A+ O$ V4 _( @ulation of androgen receptor number.10,12 However,% ?2 s, ?. K6 @# Y# _/ F# m% k6 D
Sutherland et al13 did not find a correlation between& _) ~& {( K' v
childhood testosterone exposure and reduced adult
: U/ P! n' I; E: Cpenile length in clinical studies.- [; _2 \9 P2 W0 r q6 B
Nonetheless, we do not believe our patient is1 W! J: a0 W9 I6 J8 w
going to experience any of the untoward effects from
6 U# a. h$ V T9 atestosterone exposure as mentioned earlier because
6 Z+ W O; W& x1 t% S I) sthe exposure was not for a prolonged period of time.
3 |9 P0 q7 z8 U7 ]6 i7 hAlthough the bone age was advanced at the time of" Z/ l1 @) D& V' C2 c
diagnosis, the child had a normal growth velocity at
+ T$ r- v1 E0 [! b8 |! h" f( I0 `/ j% Ythe follow-up visit. It is hoped that his final adult' u" W5 G' p0 t/ ]
height will not be affected.
( f2 X4 T2 J# X6 oAlthough rarely reported, the widespread avail-
9 N: i' J- w* j" A7 t$ a6 D# Rability of androgen products in our society may8 W$ P5 R; Q6 o6 o
indeed cause more virilization in male or female6 J& t: ] A s. p2 y
children than one would realize. Exposure to andro-
( a+ z# |3 z) kgen products must be considered and specific ques- d% X6 \5 @# r7 M/ z2 k. o8 o; X
tioning about the use of a testosterone product or# F1 J6 ]; b2 A7 w- M o
gel should be asked of the family members during; d) T" ?5 b' y' p. A6 m7 S( {
the evaluation of any children who present with vir-
+ k5 x( d1 @1 }3 H6 ailization or peripheral precocious puberty. The diag-5 F) r9 }, M$ W7 I) C1 L
nosis can be established by just a few tests and by6 ?, k8 L5 f/ h( @" z$ q
appropriate history. The inability to obtain such a- A2 T9 q9 \2 E' C# L5 d
history, or failure to ask the specific questions, may
# q; B; |0 V% P7 p! fresult in extensive, unnecessary, and expensive; _, r7 l8 U+ G! X
investigation. The primary care physician should be# t! l2 u( G! r4 o( C
aware of this fact, because most of these children
0 B$ P2 Z6 u6 t% E! o& Gmay initially present in their practice. The Physicians’
- F# m, J- M) j8 s+ u. Z9 G' H- IDesk Reference and package insert should also put a8 @+ p# `, Z. H' s# Z: T+ P
warning about the virilizing effect on a male or2 N ]! t+ X( L- v
female child who might come in contact with some-
) y1 w/ v' Z% J3 p7 none using any of these products.
9 M+ q1 b) t- L5 k- i/ A6 G5 ^8 k1 a& aReferences; X7 U6 u% ^: b
1. Styne DM. The testes: disorder of sexual differentiation
9 C l8 E, w) g' e5 Pand puberty in the male. In: Sperling MA, ed. Pediatric
! X3 S$ Z3 V- r, ?1 b7 e! jEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
% \; v$ D2 g# P; T+ F7 j g$ Z- C2002: 565-628.
. {9 ~/ F% J4 m6 m" q/ z- R2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
' I' C8 J' R4 h E _' Z mpuberty in children with tumours of the suprasellar pineal1 z$ S: } Z2 Z- z2 I* n
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from# L& L9 S5 `7 B, |6 ?3 ~; ~
Topical Testosterone Exposure / Bhowmick et al 5430 N* u) R- \; l+ i
areas: organic central precocious puberty. Acta Paediatr.) c. r" |, s* g+ P7 ~" ^; k
2001;90:751-756. s# I6 K' r4 B2 ^, _9 |+ v
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
9 {- ]! {0 C. M. R' sPediatric Endocrinology. 4th ed. New York, NY: Marcel
$ m0 V/ d" }) @+ B3 iDekker Inc; 2003:211-238.* s6 P/ h1 V* K, B# u
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
4 P M4 c5 p& vdevelopment in a two-year-old boy induced by topical) u9 K1 L( D# s( p; Q' J& R- K
exposure to testosterone. Pediatrics. 1999;104:e23.$ L( J# S* _$ `" H
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
8 P; n, b% q9 |" mSkeletal Development of the Hand and Wrist. 2nd ed.
: W" C4 d2 q1 B. D; DStanford, CA: Stanford University Press; 1959.9 N9 Y4 Y% f" ^) U4 e f4 v
6. Physicians’ Desk Reference. Androgel 1% testosterone,
6 W, y# I) ]/ D$ k8 I# j. ~& d7 gUnimed Pharmaceutical Inc. Montvale, NJ: Medical$ v+ \, ~5 P0 l8 D' L' @, g0 h0 Q
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