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is a significant concern for physicians. Central
' h( A' g3 N$ X- C7 {: v. O% mprecocious puberty (CPP), which is mediated) s" U& e8 n! V7 z* A+ [8 f2 a
through the hypothalamic pituitary gonadal axis, has
) D, g g2 F ]! T" n' g9 d: u' Ha higher incidence of organic central nervous system
8 H L9 A! ?- j: ~' A# K% Ulesions in boys.1,2 Virilization in boys, as manifested
- c/ H6 H( H: Z2 H8 O! f. L* Z- oby enlargement of the penis, development of pubic( L; R2 n, W" k4 K2 r2 J
hair, and facial acne without enlargement of testi-+ {2 Y" a$ H, B+ Z+ s& k
cles, suggests peripheral or pseudopuberty.1-3 We
! k1 N: Y: L3 d. preport a 16-month-old boy who presented with the
6 w5 Q7 E9 e! l. G! }2 Senlargement of the phallus and pubic hair develop-$ F# m" T; W r! t% F2 Z, D& R
ment without testicular enlargement, which was due; q8 @6 {( a. x P# h/ e, N
to the unintentional exposure to androgen gel used by
5 a- `! G6 R3 q8 Hthe father. The family initially concealed this infor-
9 i3 ?4 Q* j& S% J, f7 s6 D% n, bmation, resulting in an extensive work-up for this
, @/ M) p+ ]0 i0 w* wchild. Given the widespread and easy availability of
& {# w1 K. [; Ktestosterone gel and cream, we believe this is proba-
; ]6 t6 H; @. b& H6 _bly more common than the rare case report in the% I: g( x7 _/ r, K: [
literature.4
( O; X! P+ _ ?8 x% y! TPatient Report2 [* u: d% L$ l6 c) S/ y
A 16-month-old white child was referred to the
0 K: B0 G7 ]' t# a2 n- B, e: G- G0 B3 vendocrine clinic by his pediatrician with the concern
. `, W9 e2 q% X) S/ q- x5 Vof early sexual development. His mother noticed. `! c/ l# d3 g( L9 r! F5 m }2 q3 e9 S. X
light colored pubic hair development when he was
* J3 a& y1 w+ F7 h: j; H& dFrom the 1Division of Pediatric Endocrinology, 2University of
: A% G+ m) o( l3 g% G A" |7 TSouth Alabama Medical Center, Mobile, Alabama.. n/ S4 {7 {' [) T$ [4 \
Address correspondence to: Samar K. Bhowmick, MD, FACE,% N. d7 J g. y2 X; [0 V
Professor of Pediatrics, University of South Alabama, College of5 N& Y; t; N+ D7 ~2 H
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
1 i- \% A" e- P1 Ne-mail: [email protected].
( d* o; Z4 v* o z! ~% N" L* ]' fabout 6 to 7 months old, which progressively became! f+ ~6 k' @( v* n
darker. She was also concerned about the enlarge-# |; z1 {3 N3 B; W$ A, l
ment of his penis and frequent erections. The child7 X# i8 B6 j) W3 s0 ]& Y9 @
was the product of a full-term normal delivery, with; \& @, A& r. X& f5 [
a birth weight of 7 lb 14 oz, and birth length of6 u, E6 Z- p( p+ T6 F7 l
20 inches. He was breast-fed throughout the first year
- W% d& p$ u! `of life and was still receiving breast milk along with
1 [+ w# s2 d- Y5 Q% m2 K; Wsolid food. He had no hospitalizations or surgery,# I. {/ @. B. b6 K
and his psychosocial and psychomotor development; A0 k2 i6 f! o1 u! [: y+ K7 P; V
was age appropriate.! X# a, |2 B: Y% d, }' Z2 A
The family history was remarkable for the father, T' F5 I7 B) l, }( T
who was diagnosed with hypothyroidism at age 16,/ K+ b: A( o ]
which was treated with thyroxine. The father’s
# J; W+ o) [8 S# e* mheight was 6 feet, and he went through a somewhat
3 v0 f; @" a: U; S6 l) @' g) \early puberty and had stopped growing by age 14." F8 {2 }# L( k
The father denied taking any other medication. The3 w! d* J0 X1 A' Y1 b) w# K& z
child’s mother was in good health. Her menarche$ V+ i, m5 @: N% }
was at 11 years of age, and her height was at 5 feet. t: @4 u# Z" p, {
5 inches. There was no other family history of pre-
* L0 M8 l& X$ y7 h# u0 Y1 vcocious sexual development in the first-degree rela-9 y: R) @9 u: A
tives. There were no siblings.
* G3 J8 ?3 c; i, _Physical Examination
6 S/ X8 j4 O* W: l3 rThe physical examination revealed a very active,0 J4 Y' P+ Q2 b( z( ], q# p+ w9 V
playful, and healthy boy. The vital signs documented
/ a: L# j, d6 P; G/ Ta blood pressure of 85/50 mm Hg, his length was* e) C4 t2 [( x7 r q! e) [! O9 ]
90 cm (>97th percentile), and his weight was 14.4 kg
' O/ \ p' Z, p* |" U% V" I& e3 C9 q(also >97th percentile). The observed yearly growth4 v7 b/ L6 R1 l* Z
velocity was 30 cm (12 inches). The examination of
+ j0 V2 ~: B2 h1 F# Rthe neck revealed no thyroid enlargement.
" U) M0 V2 G$ [- O, gThe genitourinary examination was remarkable for
8 o Z2 w: ^% wenlargement of the penis, with a stretched length of
! l' b1 C& g5 _ M8 cm and a width of 2 cm. The glans penis was very well
4 \+ H- q( O5 C6 N2 ?$ n9 E) ndeveloped. The pubic hair was Tanner II, mostly around4 {2 K( e% k! i: N7 J
540! |2 R5 @+ U, k8 f0 m
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) [& `# \" v( s# C+ e; `4 J- J
the base of the phallus and was dark and curled. The
! ~ }2 Z$ [/ b+ r0 }) F; b: Vtesticular volume was prepubertal at 2 mL each.
" c* k! H% c: k8 p) lThe skin was moist and smooth and somewhat# x% d; x" x% Z
oily. No axillary hair was noted. There were no+ t- |8 n1 Q% n+ {7 s
abnormal skin pigmentations or café-au-lait spots.
- Z# W: }7 m2 \& T5 R( V; I- ]Neurologic evaluation showed deep tendon reflex 2+: ~7 m9 s: ]2 }& |/ T: A4 ]& I# N
bilateral and symmetrical. There was no suggestion
( C/ W0 U9 e$ c/ R4 B2 O/ T8 Yof papilledema.
; [/ e5 U' ~6 K3 S' R% a0 I. t. KLaboratory Evaluation
+ [0 K6 Y- |, \3 _" iThe bone age was consistent with 28 months by
" C$ d' `- e+ I) Q- lusing the standard of Greulich and Pyle at a chrono-# O2 I8 \+ `: w2 a% ]1 n; q
logic age of 16 months (advanced).5 Chromosomal
- h& v% s* n" a: rkaryotype was 46XY. The thyroid function test
6 q4 \" f- T/ A. k0 f" Mshowed a free T4 of 1.69 ng/dL, and thyroid stimu-( O' A1 W6 H' U' U% ^9 x
lating hormone level was 1.3 µIU/mL (both normal).
* O; {6 b+ x. z4 k# s2 M# v0 ]* j" dThe concentrations of serum electrolytes, blood) J& c8 k% x* T0 A
urea nitrogen, creatinine, and calcium all were
% Y1 G0 n7 O& g6 y* W1 _* ?, R3 H( kwithin normal range for his age. The concentration, B; v* n, k( c( @9 h
of serum 17-hydroxyprogesterone was 16 ng/dL; A0 [0 j! M, ~- D( {( d$ l
(normal, 3 to 90 ng/dL), androstenedione was 20
- X" |9 x' Z/ h0 N7 b/ v8 |+ Ang/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
* J+ `! G$ U% \5 Z E, Y; u2 Bterone was 38 ng/dL (normal, 50 to 760 ng/dL),
0 g/ E: W( s g m- Z N0 T( G. ?desoxycorticosterone was 4.3 ng/dL (normal, 7 to
+ i1 K) `8 j% X49ng/dL), 11-desoxycortisol (specific compound S) v& t" l) U& M) |/ b
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
# g I) z5 J6 i0 a3 U2 stisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
' J2 P8 v+ `( E' }5 Otestosterone was 60 ng/dL (normal <3 to 10 ng/dL),; [" I8 B! S1 b
and β-human chorionic gonadotropin was less than
' ?. E5 h9 W5 y5 mIU/mL (normal <5 mIU/mL). Serum follicular3 N6 ?% p2 c* N% o( M+ U% f" t, P
stimulating hormone and leuteinizing hormone9 X& ^# Y8 [ S0 F1 [ U
concentrations were less than 0.05 mIU/mL
: X9 Z$ a3 o; ?1 @% D4 D& ](prepubertal).
1 _, A ^. O; ?4 x+ f4 k% k0 X2 sThe parents were notified about the laboratory9 i! b( K |7 P" j1 i
results and were informed that all of the tests were$ B5 M }+ h' \6 L, @/ `4 c
normal except the testosterone level was high. The0 T0 ~4 D! f5 N" o( ^& b( K# |- h
follow-up visit was arranged within a few weeks to. a5 L/ Y5 m* n% o; u% z8 V
obtain testicular and abdominal sonograms; how-( _) t, ~- P, R
ever, the family did not return for 4 months.6 o$ _2 v6 |' p7 X, u+ | g) _
Physical examination at this time revealed that the
1 K/ l* J& e, G$ s) h) P& {child had grown 2.5 cm in 4 months and had gained5 V, o% W3 L+ c2 S) J1 n/ V) I+ R- P
2 kg of weight. Physical examination remained, u" ?, t' g1 h& g) w# {9 {" S- O
unchanged. Surprisingly, the pubic hair almost com-& u( G2 M& }) Y: N' \0 a+ H
pletely disappeared except for a few vellous hairs at. v. Q- R6 C" g* Y0 g s
the base of the phallus. Testicular volume was still 2" M5 B3 S* e( H% o# h8 O2 Q
mL, and the size of the penis remained unchanged.& u9 K, P7 D. y* X8 b
The mother also said that the boy was no longer hav-0 B9 f8 z& d3 ]( H8 g
ing frequent erections.
$ a Z1 \6 A: }/ h! OBoth parents were again questioned about use of# W% e, h/ R8 V3 X" G" O3 k' G) f) A
any ointment/creams that they may have applied to5 Q& _' s: g- i0 d" y
the child’s skin. This time the father admitted the3 v. N$ ^ o) P0 u! l
Topical Testosterone Exposure / Bhowmick et al 5411 Q& x6 J/ t2 s! @! E+ `
use of testosterone gel twice daily that he was apply-
/ A2 ]* y$ |9 I! J6 A& Q& ling over his own shoulders, chest, and back area for$ i" H9 k, U* C2 ~; d* i
a year. The father also revealed he was embarrassed
+ r7 ?; v( [0 F! Dto disclose that he was using a testosterone gel pre-
: V+ A, G/ A5 G1 o- J8 l Uscribed by his family physician for decreased libido/ Z' m! D3 }+ d* o4 D. r
secondary to depression." v9 a6 Z1 W( _% b
The child slept in the same bed with parents./ w8 I# ?: g$ g; j5 B0 ^
The father would hug the baby and hold him on his
6 t/ q) J& r, \2 _# Q4 e3 k) {chest for a considerable period of time, causing sig-
6 B2 r: A. n7 \/ z, a) J7 M' Enificant bare skin contact between baby and father.7 U7 } G1 i" w. B7 _
The father also admitted that after the phone call,
2 q0 v5 a6 h2 {# Mwhen he learned the testosterone level in the baby; v& g( @& S* T
was high, he then read the product information
1 s b7 w# b8 ]packet and concluded that it was most likely the rea-
) {2 L/ g1 Z' Yson for the child’s virilization. At that time, they
- n3 E- a( e, A3 P8 adecided to put the baby in a separate bed, and the
( u/ ]6 ?, P$ n0 Y" Q% a& [father was not hugging him with bare skin and had% I3 `# g+ o4 Y. N5 ]( u+ G, L. o
been using protective clothing. A repeat testosterone
2 h6 E6 _* Q6 _2 D% Utest was ordered, but the family did not go to the: d$ @/ ]. `4 i1 k
laboratory to obtain the test.
/ y) V! ]' |! s: _+ T$ Z. n3 M( m# TDiscussion
/ l% D& J# e# r& l( w& l/ A3 APrecocious puberty in boys is defined as secondary9 d/ ]; l0 A6 h' G
sexual development before 9 years of age.1,48 x- \" I3 x! \4 ^' W; v/ r
Precocious puberty is termed as central (true) when) K& s2 V3 f! I7 T+ h
it is caused by the premature activation of hypo-
3 e2 f0 h X) m7 z2 Bthalamic pituitary gonadal axis. CPP is more com-. J7 b' S1 Y+ W" |) f$ [9 @: x# b+ a
mon in girls than in boys.1,3 Most boys with CPP1 U3 F& W) g$ }% d- Y2 O
may have a central nervous system lesion that is
7 X) O. W; p0 u M2 L5 q6 Eresponsible for the early activation of the hypothal-
% ?; m7 F& k) N( y& [amic pituitary gonadal axis.1-3 Thus, greater empha-
v" ?7 B; [0 X4 n4 |+ y- ^sis has been given to neuroradiologic imaging in
, N& p( {; u) Z* xboys with precocious puberty. In addition to viril-
9 b" b7 {$ g4 B4 h S5 Uization, the clinical hallmark of CPP is the symmet-
2 H0 e0 D5 Y7 K8 N2 F! grical testicular growth secondary to stimulation by- r3 A8 f8 i3 P. ?- y
gonadotropins.1,3
# f2 c3 S2 E! ~4 j: \7 K9 |9 rGonadotropin-independent peripheral preco-
- g. z C* ^# G& Zcious puberty in boys also results from inappropriate
3 a6 Z5 W3 N, W2 |7 ?4 S" V6 Oandrogenic stimulation from either endogenous or9 k) T! @2 F8 ^- b5 G& f
exogenous sources, nonpituitary gonadotropin stim-
. p% j8 j. N4 S( p8 x. F: z" ^, Fulation, and rare activating mutations.3 Virilizing
3 w; r. I' i( S# }# l, Ucongenital adrenal hyperplasia producing excessive
! g. I' \7 V9 G9 b. ?8 Kadrenal androgens is a common cause of precocious( |) `* _+ {8 Q" d
puberty in boys.3,46 h+ _. G( k0 u4 X3 \3 W8 g3 }. x
The most common form of congenital adrenal0 @4 X# m4 s2 ]: q3 W; m5 @$ ^
hyperplasia is the 21-hydroxylase enzyme deficiency.
' n& f+ n- i) ^& ]% v* DThe 11-β hydroxylase deficiency may also result in
8 @" K2 n M" n" n. P" B3 Jexcessive adrenal androgen production, and rarely,
: s+ U) t# N& L3 P& y# n4 jan adrenal tumor may also cause adrenal androgen' T2 l) {/ n7 g& S
excess.1,3
6 [# L) P$ R8 j" {( ?+ ?at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 Z+ i9 E3 k+ X& M. |% ~% w
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007& K6 r$ W9 C0 d% D+ ^5 `9 _# Y
A unique entity of male-limited gonadotropin-6 V( h. {2 S+ O
independent precocious puberty, which is also known
" u3 m; a; s1 N( T$ T5 Vas testotoxicosis, may cause precocious puberty at a
" e4 Y6 x7 L& Y& P m( X6 ^very young age. The physical findings in these boys
$ G$ I. {) ?# Awith this disorder are full pubertal development,
^1 l; c1 q; L, }8 Q' k7 a) nincluding bilateral testicular growth, similar to boys
E3 w5 o9 M' ywith CPP. The gonadotropin levels in this disorder
8 f \, o0 b! J1 ^& o+ ^+ [) X% qare suppressed to prepubertal levels and do not show4 K0 a9 `3 r$ i, E5 ^
pubertal response of gonadotropin after gonadotropin-
- {6 ]% J2 z2 M8 }releasing hormone stimulation. This is a sex-linked
- d/ X, V0 W3 ?autosomal dominant disorder that affects only
" w: G6 ]% Y$ w" G( jmales; therefore, other male members of the family
/ N, ?7 Y+ ~* R5 p! umay have similar precocious puberty.3, ]# V8 L9 |, J3 u: j
In our patient, physical examination was incon-
! g/ G$ `, o4 @) q2 w/ [sistent with true precocious puberty since his testi-
3 d( P* y# o# s$ A; E8 wcles were prepubertal in size. However, testotoxicosis
# c/ \% F9 ~( @& Cwas in the differential diagnosis because his father
/ j8 t" m- p* ]7 v+ m( \2 [* B& Pstarted puberty somewhat early, and occasionally,
! U/ b9 i7 Z4 y# ttesticular enlargement is not that evident in the
6 `7 g1 j' r I1 v3 D- ^beginning of this process.1 In the absence of a neg-0 N) F/ R# X1 {- Y
ative initial history of androgen exposure, our
, @' z0 {1 b* |- J8 obiggest concern was virilizing adrenal hyperplasia,
( c& ?0 `4 |5 m. Q/ Q! M: Oeither 21-hydroxylase deficiency or 11-β hydroxylase
/ c: [0 J* K7 ~; d# @4 gdeficiency. Those diagnoses were excluded by find-
% O8 W# b- H# r7 R! I3 ling the normal level of adrenal steroids.& l6 i. W8 l- }
The diagnosis of exogenous androgens was strongly
1 Y) _6 ^. G+ y# x4 fsuspected in a follow-up visit after 4 months because- F' a" S" p+ e
the physical examination revealed the complete disap-
& N* n& ^2 P" h+ qpearance of pubic hair, normal growth velocity, and5 x' c6 @; K. S% J" f
decreased erections. The father admitted using a testos-
" A. }0 C4 V4 @$ i; A7 e/ Tterone gel, which he concealed at first visit. He was
" o4 j1 w8 a Z$ e1 F; R* Lusing it rather frequently, twice a day. The Physicians’2 A4 M9 w) U; W3 G6 a0 B
Desk Reference, or package insert of this product, gel or
! T6 W' s! q, l; r: ncream, cautions about dermal testosterone transfer to
, N4 I3 |/ K Y3 N( @( T0 `$ F ]unprotected females through direct skin exposure.
0 z0 T. K, h7 [2 J* o. nSerum testosterone level was found to be 2 times the1 g1 Q4 @8 G; q# [/ G2 F# \# b1 O
baseline value in those females who were exposed to5 R9 _; D+ P4 e G. r
even 15 minutes of direct skin contact with their male
) a- u* u9 i# G# G* b' fpartners.6 However, when a shirt covered the applica-! v# ` b- n# O9 ?' u# P
tion site, this testosterone transfer was prevented.
0 }6 Y* M. u! a8 t4 z; `5 h# m4 Y1 zOur patient’s testosterone level was 60 ng/mL,
; V O7 A2 y6 E( f- C( owhich was clearly high. Some studies suggest that
+ A( e/ w+ P9 ^dermal conversion of testosterone to dihydrotestos-
; V! e- {) z$ ^' \terone, which is a more potent metabolite, is more& V( ^1 Q0 W" `( G$ k
active in young children exposed to testosterone6 p X; J' j! [% r
exogenously7; however, we did not measure a dihy-
& L. V7 V+ F, ^3 Bdrotestosterone level in our patient. In addition to
: u( z0 o5 C3 E k$ Vvirilization, exposure to exogenous testosterone in
* F- S9 e1 I' _ e6 O: Hchildren results in an increase in growth velocity and
+ E3 b: G+ h# zadvanced bone age, as seen in our patient.
0 `. Z5 s9 l7 W) [The long-term effect of androgen exposure during
) z! k$ I. _) H1 qearly childhood on pubertal development and final
" a' _; V4 f7 k# Kadult height are not fully known and always remain
1 I& ?* L+ j8 c9 D$ Va concern. Children treated with short-term testos-
) q8 U9 J0 a0 f: s3 u" l) z! I* bterone injection or topical androgen may exhibit some
5 D+ Q! q/ h# d0 J1 b5 I* Wacceleration of the skeletal maturation; however, after) `* Y1 O+ w$ S# k
cessation of treatment, the rate of bone maturation
4 E# @; a8 g9 i$ p3 H3 m5 R3 J4 X; Jdecelerates and gradually returns to normal.8,9
, r5 S; s$ J- dThere are conflicting reports and controversy
. v6 O1 V! L$ A$ Dover the effect of early androgen exposure on adult$ y0 X7 [' z6 P8 x
penile length.10,11 Some reports suggest subnormal$ p$ N$ _8 s: e9 `, I' `
adult penile length, apparently because of downreg-
4 z! V5 _9 u- X Wulation of androgen receptor number.10,12 However,
5 [6 k2 q" S: \/ OSutherland et al13 did not find a correlation between2 ? V; @! ~6 R Q7 l) z$ e+ f
childhood testosterone exposure and reduced adult/ q6 q- q5 Q8 _
penile length in clinical studies.
# i; X7 C" W* A5 i/ ^- E! zNonetheless, we do not believe our patient is
. r1 Z E: {; E5 o: Hgoing to experience any of the untoward effects from
4 u- i4 L; j- Y% h8 ztestosterone exposure as mentioned earlier because
6 c" [/ D1 F) U8 d. Hthe exposure was not for a prolonged period of time." y' Q0 v0 l) G; O6 F4 `
Although the bone age was advanced at the time of! M8 ~, M2 d" q& l& w3 Q
diagnosis, the child had a normal growth velocity at
, D# }' w. I' y, c2 A4 W5 H+ Dthe follow-up visit. It is hoped that his final adult2 `# f0 i' k" k) A9 L: r
height will not be affected.& G }% I( Z0 p. |8 L1 }
Although rarely reported, the widespread avail-
0 ^9 x Y" c( U- E0 C& @+ Bability of androgen products in our society may9 e, Y9 T9 G4 I3 x: o& q
indeed cause more virilization in male or female( N) D' e2 ?7 h
children than one would realize. Exposure to andro-
, B/ M3 q8 q' t; sgen products must be considered and specific ques-" ?5 K! `/ Q9 s7 x& T
tioning about the use of a testosterone product or
& X) E/ V" I, E# D1 ?$ Z' y! sgel should be asked of the family members during
2 D. f' @3 {) U2 `$ h4 _5 ythe evaluation of any children who present with vir-
) c c- {7 S6 a# }" y) r4 H& \* {ilization or peripheral precocious puberty. The diag-$ x( y; n* W( v' z, U
nosis can be established by just a few tests and by
9 j! n% s/ X6 a5 q4 u' w2 U& Z( S# ^appropriate history. The inability to obtain such a
7 l6 b' ^1 A' R, S/ ohistory, or failure to ask the specific questions, may
3 J1 y9 y- ?( v+ yresult in extensive, unnecessary, and expensive0 O% q4 M8 x9 X4 O
investigation. The primary care physician should be% y: p' k& R* p
aware of this fact, because most of these children8 C: O1 N. d/ {
may initially present in their practice. The Physicians’2 m* O8 W% U- h; _- V: N* a/ T- J7 _
Desk Reference and package insert should also put a
" L6 z1 c7 G, b$ v" \8 m9 u2 Gwarning about the virilizing effect on a male or: S* O/ C7 u* w4 I
female child who might come in contact with some-
: c/ S/ D# |7 o: i1 s Yone using any of these products.
) n* S6 O+ k WReferences q, M- o8 C& q6 j7 j
1. Styne DM. The testes: disorder of sexual differentiation) y- i9 V; m/ T; Y2 G
and puberty in the male. In: Sperling MA, ed. Pediatric
9 K/ n8 k" M: p% MEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;' ^% v( c! B- u3 _" e$ u
2002: 565-628.: s5 @! w% Q2 c
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
, P) c2 Q, y8 {; @; I% {* `/ Rpuberty in children with tumours of the suprasellar pineal' M" c/ {1 V6 y& V% T- C
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Topical Testosterone Exposure / Bhowmick et al 543* J% V2 O* w4 q4 n# {
areas: organic central precocious puberty. Acta Paediatr.* h. c8 o5 r+ S% [* H
2001;90:751-756.# |- O. X+ @, |6 L! G
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed./ a% I- a( n0 }/ ~
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
% z' S+ Y& b( Y$ Q" ^$ vDekker Inc; 2003:211-238.3 ~( v. \$ Y& d
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
* v% d$ O2 B: }. o, ]7 [( B7 t9 F9 kdevelopment in a two-year-old boy induced by topical
% t. v3 S. a `exposure to testosterone. Pediatrics. 1999;104:e23.
! g' c( ?0 D2 g! t5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
7 Z0 Y* G- y5 f( i, s! Q& |Skeletal Development of the Hand and Wrist. 2nd ed.
4 u5 M; K* Y% y2 n7 hStanford, CA: Stanford University Press; 1959.
2 J3 z5 T. i% j/ [1 _0 m6. Physicians’ Desk Reference. Androgel 1% testosterone,
7 R9 x! @) N D1 M6 hUnimed Pharmaceutical Inc. Montvale, NJ: Medical4 R% a- b( z& f/ s# f3 N9 @5 S* j
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