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is a significant concern for physicians. Central9 b/ Z. J2 t) s |
precocious puberty (CPP), which is mediated2 k4 N' G+ U4 b, @ w9 r
through the hypothalamic pituitary gonadal axis, has
2 q& q2 _9 t Q- B f: ja higher incidence of organic central nervous system x8 K( @, F9 R, Q; U9 j7 ^% N
lesions in boys.1,2 Virilization in boys, as manifested
0 Y% Z1 u: G" d( |by enlargement of the penis, development of pubic0 N+ W" u' H+ t/ M- E
hair, and facial acne without enlargement of testi-
: ?) o8 k; p3 W" }( F" E$ M7 {cles, suggests peripheral or pseudopuberty.1-3 We1 q% V( a6 U. R' Q5 |
report a 16-month-old boy who presented with the
. h% b/ \; v/ c* u; R3 X- L denlargement of the phallus and pubic hair develop-
) U! a" E7 Y9 C/ Zment without testicular enlargement, which was due
3 C7 s; ]( X$ K5 s. @to the unintentional exposure to androgen gel used by2 d6 z) ~3 C( u' _1 N9 n, g
the father. The family initially concealed this infor-3 e& Q1 B a" B7 D9 c* z
mation, resulting in an extensive work-up for this
1 X5 x# ~2 X8 `" j( C! `" t% Achild. Given the widespread and easy availability of
# Y# I0 w2 B" }/ atestosterone gel and cream, we believe this is proba-0 l3 t. n$ g1 A( y" O
bly more common than the rare case report in the# R) U J! l( K2 k( O7 j$ E
literature.41 R9 K/ a0 k* B7 [9 t$ W
Patient Report
( [0 |2 t5 s! p& ~: m0 E sA 16-month-old white child was referred to the8 G+ l' d' `5 w5 W6 i
endocrine clinic by his pediatrician with the concern# v2 M! h8 p% ^/ _. ^
of early sexual development. His mother noticed7 o' M( Y5 x& q( i
light colored pubic hair development when he was3 q9 R, q9 D) t* I. B
From the 1Division of Pediatric Endocrinology, 2University of
( |/ e" M0 S3 s' H( JSouth Alabama Medical Center, Mobile, Alabama.
6 Y* o1 S1 O9 Z" f0 cAddress correspondence to: Samar K. Bhowmick, MD, FACE,
' {; W; z& {: g0 s$ c" b+ EProfessor of Pediatrics, University of South Alabama, College of
?) h$ g: ~, }5 o2 y1 i# ]7 tMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
% s' D7 ?( Z. Y8 k$ {8 Re-mail: [email protected].1 c2 T& o: ?9 U. O' `. u
about 6 to 7 months old, which progressively became6 |0 m6 d4 b v2 R
darker. She was also concerned about the enlarge-/ P3 N5 N/ i# v" }0 G% I; w" s! f
ment of his penis and frequent erections. The child; m* j0 Q! F9 p( G& [9 B
was the product of a full-term normal delivery, with
2 m8 x: V) z0 J7 E" y$ Ba birth weight of 7 lb 14 oz, and birth length of
9 B( u( h9 @+ t" U+ G& Y) r20 inches. He was breast-fed throughout the first year' ~) P1 }; n8 B: z3 `
of life and was still receiving breast milk along with! Y" i0 y; i' g( n" \1 _
solid food. He had no hospitalizations or surgery,1 x4 F+ L' T1 @
and his psychosocial and psychomotor development
3 S/ z& {- z& ^was age appropriate.1 y5 r0 [$ Z) L* v5 S5 M
The family history was remarkable for the father, C! v/ w8 z7 m% u' q
who was diagnosed with hypothyroidism at age 16,, n9 {, n H- [) g- i* D& Q( ~5 Z
which was treated with thyroxine. The father’s( S' K' Z/ Y( w0 V; r) f
height was 6 feet, and he went through a somewhat
5 x; t# N3 E* r$ ` Bearly puberty and had stopped growing by age 14.
' V' ~+ f8 ]4 L% |" N) s, a1 hThe father denied taking any other medication. The
8 f5 Y5 I2 M/ Y; F) n z( f9 ^child’s mother was in good health. Her menarche
$ V, y. \9 Y; `0 c4 E k) u# ]1 \was at 11 years of age, and her height was at 5 feet+ R- X0 L3 t, {: w, o7 \( D2 X: T
5 inches. There was no other family history of pre-
$ `* [) L$ X! ^+ X* i) m- kcocious sexual development in the first-degree rela-+ ~7 R3 u# f/ a5 \2 x) C
tives. There were no siblings.
! s8 b/ K- [0 ?& T HPhysical Examination
' p/ `. \# D8 UThe physical examination revealed a very active,9 t- `) E3 l2 B9 P
playful, and healthy boy. The vital signs documented
. t* V- b" T0 d0 b ~+ va blood pressure of 85/50 mm Hg, his length was
: s+ g/ z3 C/ t4 z3 M90 cm (>97th percentile), and his weight was 14.4 kg
1 p5 U4 |% z" Z4 o L$ f2 s) q(also >97th percentile). The observed yearly growth! M4 |+ }- s6 p9 v
velocity was 30 cm (12 inches). The examination of0 q5 x. q, f: J
the neck revealed no thyroid enlargement.8 G$ n6 \/ u' L$ D" X3 d
The genitourinary examination was remarkable for8 O! H# L/ U1 l x [0 j
enlargement of the penis, with a stretched length of. P. ?' J) h4 Q9 t
8 cm and a width of 2 cm. The glans penis was very well8 P8 D- E+ X' i" {; a5 D/ z
developed. The pubic hair was Tanner II, mostly around
0 b' ?$ z* F4 b+ {! _. ^. D, p7 _4 B540
7 X; U" g( }2 U2 ~% t" k# \8 Oat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
; y* ]+ W1 Z% Vthe base of the phallus and was dark and curled. The
+ c& {. M, ]% Z# R4 Q6 ztesticular volume was prepubertal at 2 mL each.
6 X! R5 Q5 Z6 j* X6 b* M; IThe skin was moist and smooth and somewhat+ z' O$ f- n7 N1 J
oily. No axillary hair was noted. There were no- X) A0 N# J0 D t# y& }' Y
abnormal skin pigmentations or café-au-lait spots.+ {+ X" d7 u. z) p$ u' r, l; X; L
Neurologic evaluation showed deep tendon reflex 2+
! J6 x. ]5 g! l/ k% L% Nbilateral and symmetrical. There was no suggestion
, p# f2 h/ f$ P1 Oof papilledema.6 \, G: A% S% { b
Laboratory Evaluation
3 H2 _! X) w" H6 xThe bone age was consistent with 28 months by6 m4 T* S2 {8 m" F' e
using the standard of Greulich and Pyle at a chrono-0 h5 l* K( ~ B. L- B) }
logic age of 16 months (advanced).5 Chromosomal
/ y; S/ v/ \- v" ]karyotype was 46XY. The thyroid function test
4 l( K3 N/ V% |% f) Fshowed a free T4 of 1.69 ng/dL, and thyroid stimu-7 e' o" d9 [ M
lating hormone level was 1.3 µIU/mL (both normal)., Z) m4 c9 C1 j; w+ }/ A
The concentrations of serum electrolytes, blood$ d$ d: Y5 N N. U1 L+ h
urea nitrogen, creatinine, and calcium all were- y9 W. q+ K9 Z/ w7 y, g; q! r
within normal range for his age. The concentration; g+ i5 p: E' c. x$ l9 f+ Q
of serum 17-hydroxyprogesterone was 16 ng/dL( N* H! u3 ~8 f9 `) D
(normal, 3 to 90 ng/dL), androstenedione was 20
4 s9 U" \ W- `# d# |1 c, Jng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
0 ?0 V+ L- Z$ k2 j. _1 Yterone was 38 ng/dL (normal, 50 to 760 ng/dL),. S$ D8 z5 u# u( O; W/ {* X# f M
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
/ L7 x' V6 X: m6 @49ng/dL), 11-desoxycortisol (specific compound S)5 ^2 r# t8 O! A: N E2 C* v: O- j4 Z/ s
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-+ V, n% x, Y% x# Y
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total! g4 `6 u4 a* |6 p0 X7 J$ p8 @
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),* a8 Q4 M. q' F1 P
and β-human chorionic gonadotropin was less than
. x! A/ d6 k+ A5 Y; B5 mIU/mL (normal <5 mIU/mL). Serum follicular
4 v' |3 ~, D, \, m% V5 z! Y) K3 Ustimulating hormone and leuteinizing hormone6 C9 S4 k! B, r
concentrations were less than 0.05 mIU/mL
/ Q6 F4 M; U0 f9 S0 n" ?1 N) j(prepubertal).
6 ?$ `7 v+ v8 D0 W+ eThe parents were notified about the laboratory
: Q" g! [% i$ D# r6 Xresults and were informed that all of the tests were: T3 g, l' H$ `9 t- C# o5 A5 N* A
normal except the testosterone level was high. The
4 f8 j: B& _( ofollow-up visit was arranged within a few weeks to
' M8 ]1 _$ d+ a' Z( R3 O$ K& oobtain testicular and abdominal sonograms; how-
% w2 K0 e, a0 [; K! _0 D0 Hever, the family did not return for 4 months.
$ `8 J' l% l r: YPhysical examination at this time revealed that the* l) j1 A( A4 h
child had grown 2.5 cm in 4 months and had gained; a" T5 {9 Q1 G7 |
2 kg of weight. Physical examination remained; B& [$ V z: Y- D
unchanged. Surprisingly, the pubic hair almost com-
% }+ a1 H3 F; F- q9 ]% Gpletely disappeared except for a few vellous hairs at
( s0 Z7 v& Y f3 c# V. P' Dthe base of the phallus. Testicular volume was still 2' W& r6 t, f7 y0 g/ p+ y. n5 ~
mL, and the size of the penis remained unchanged.
9 N! G4 g U9 n0 u% h4 `The mother also said that the boy was no longer hav-/ k- n9 s! F) y3 D
ing frequent erections.
" a; u! Y- Z r( O5 BBoth parents were again questioned about use of& `/ D5 q. k2 `. T A) P4 P
any ointment/creams that they may have applied to
1 ?# T7 R6 P4 L& _% Fthe child’s skin. This time the father admitted the% w+ Z6 m0 F, K" [; e; s H- h
Topical Testosterone Exposure / Bhowmick et al 541
- L* B. l5 y' W& Ause of testosterone gel twice daily that he was apply-
: t3 }8 M% `. Q! k8 T9 Ging over his own shoulders, chest, and back area for5 }: n! J/ k, e
a year. The father also revealed he was embarrassed
) `% m7 L; X. k0 ~- ^" eto disclose that he was using a testosterone gel pre-4 q5 r: R c5 u7 ]3 r3 j/ V
scribed by his family physician for decreased libido: o, E n1 ^# A' B
secondary to depression.
4 ?4 k) `- H5 N4 CThe child slept in the same bed with parents.3 J( w1 Z% O/ C1 R
The father would hug the baby and hold him on his/ \6 g8 e7 A, h5 N% }* G& x- C
chest for a considerable period of time, causing sig-8 e0 J3 t8 C6 s; U& C- n
nificant bare skin contact between baby and father.. Y. Y( N9 L4 Y
The father also admitted that after the phone call,
! J& ^. F, {2 p) B- S; Gwhen he learned the testosterone level in the baby4 c* l; A e1 i! z. l
was high, he then read the product information
- j3 |4 @( w$ E, L5 ypacket and concluded that it was most likely the rea-
/ i7 k1 t+ c) w; L- m$ a4 n% @8 }son for the child’s virilization. At that time, they
" l U) M4 x: x& {% q, M0 Ndecided to put the baby in a separate bed, and the$ m# k8 }$ O9 a- i$ [0 h( {
father was not hugging him with bare skin and had w* S) J8 F3 [1 _/ f- _6 p
been using protective clothing. A repeat testosterone
* O* a* d& U% s# [' l2 f/ btest was ordered, but the family did not go to the
2 g# \2 X. Y0 k, ^3 \. X, ]laboratory to obtain the test.
/ i! k7 X9 M% b/ [+ }& K) q) BDiscussion
8 B+ Q: n' n. U9 ]7 _Precocious puberty in boys is defined as secondary) v# }9 f/ H0 h
sexual development before 9 years of age.1,41 |4 n# T9 D2 b: A
Precocious puberty is termed as central (true) when( _4 u% o- e! b& ]
it is caused by the premature activation of hypo-4 D7 K9 G! k3 u" y* W5 F
thalamic pituitary gonadal axis. CPP is more com-% o: f- l* N) I/ s5 l
mon in girls than in boys.1,3 Most boys with CPP
. M j: s* c7 Z8 C- \# Vmay have a central nervous system lesion that is P. e: }% {$ H" v' d( }
responsible for the early activation of the hypothal-
. C1 E" B- F' G' samic pituitary gonadal axis.1-3 Thus, greater empha-
$ j5 R4 g/ ~. g2 p% Y* wsis has been given to neuroradiologic imaging in
! m% e* X$ p. o. B' I* S& [boys with precocious puberty. In addition to viril-
$ F3 o6 D; Z I, o% ?, w0 cization, the clinical hallmark of CPP is the symmet-
5 x: z; @# m# o$ h9 lrical testicular growth secondary to stimulation by
( r+ r) D* m: q1 X' Z G. Vgonadotropins.1,3
3 `( q5 T0 x2 `/ f2 x$ oGonadotropin-independent peripheral preco-
* l) m4 X/ M! @cious puberty in boys also results from inappropriate
4 Y1 g$ Y3 g! E8 }! oandrogenic stimulation from either endogenous or
- m1 c# [" O `9 q1 _+ qexogenous sources, nonpituitary gonadotropin stim-" J2 e3 A( n& a
ulation, and rare activating mutations.3 Virilizing9 a% r P( y+ S+ B/ S" F
congenital adrenal hyperplasia producing excessive
# e/ V2 W _* F; F% g, i- N5 g2 a* \adrenal androgens is a common cause of precocious
% U! V' ]1 p3 F) bpuberty in boys.3,4+ [/ m3 _' h+ K! R1 M* A
The most common form of congenital adrenal
& p$ [3 Q; D: l }! d$ K% [hyperplasia is the 21-hydroxylase enzyme deficiency.
; L x6 ~; m0 w# L5 E* C) o: pThe 11-β hydroxylase deficiency may also result in
X" [. v% z2 d+ R# | u% H" Fexcessive adrenal androgen production, and rarely,
( i/ Q, t W8 X% l/ I7 ~an adrenal tumor may also cause adrenal androgen
9 G+ S% E0 {1 y4 r. O: s5 Nexcess.1,3
8 Q" p+ x% Y' b: N$ ~at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
8 n) X, }7 f7 \5 V2 }* U4 K5 N; {542 Clinical Pediatrics / Vol. 46, No. 6, July 2007* E' W( U) N' ~9 Z3 v
A unique entity of male-limited gonadotropin-4 f9 y h3 M C; a! {$ ?
independent precocious puberty, which is also known' k; S5 z! r0 H$ z" d% ^7 E
as testotoxicosis, may cause precocious puberty at a% a! v1 @: p; @& I, F# L! t, ~
very young age. The physical findings in these boys5 T2 ], {8 j" v; B# o4 \ k
with this disorder are full pubertal development,
- e: [4 R7 e; y5 o( U/ P/ |including bilateral testicular growth, similar to boys4 D0 E ?; j# w0 ^, O
with CPP. The gonadotropin levels in this disorder7 I1 _( c' ^$ v/ y2 a6 u Q: v
are suppressed to prepubertal levels and do not show; E' l6 K# r0 S, Z6 z
pubertal response of gonadotropin after gonadotropin-
. L" D* N1 D( D' _releasing hormone stimulation. This is a sex-linked
6 _# ?0 t1 \6 X4 F" Vautosomal dominant disorder that affects only6 b1 |/ {! J \) {% M* m) K
males; therefore, other male members of the family" z: w1 V* U9 P: K( X
may have similar precocious puberty.3) k) R/ {) E+ W$ c* n2 {& m x
In our patient, physical examination was incon-* s) _2 s# J. G2 m, @8 ]) s8 c7 {
sistent with true precocious puberty since his testi-
/ g, T& |7 c3 K7 ]2 N* }cles were prepubertal in size. However, testotoxicosis
+ G3 K8 l' Y7 K6 z; {was in the differential diagnosis because his father+ t, T: P3 `. D
started puberty somewhat early, and occasionally,
7 r8 j8 ?9 N0 K9 G/ j, Wtesticular enlargement is not that evident in the0 q9 u1 A$ m8 N( ?4 c
beginning of this process.1 In the absence of a neg-9 `' X- l+ q- B" y! E+ M
ative initial history of androgen exposure, our$ o8 w1 @" t# e$ }
biggest concern was virilizing adrenal hyperplasia,& u: F1 y, {( E7 |; u) v
either 21-hydroxylase deficiency or 11-β hydroxylase
4 r8 z3 h" m# n/ t- d% {4 h6 B. x$ Mdeficiency. Those diagnoses were excluded by find-: p, E# x. k4 M' h# U
ing the normal level of adrenal steroids.6 t$ ?4 w+ [7 P
The diagnosis of exogenous androgens was strongly1 e3 ~# [' |/ a0 W2 P
suspected in a follow-up visit after 4 months because
" h3 l- l+ R4 Q# M- Y, \9 pthe physical examination revealed the complete disap-
+ Q# c7 E- I1 C7 @. H5 hpearance of pubic hair, normal growth velocity, and. Y, q3 K$ j) b7 s
decreased erections. The father admitted using a testos-* _2 x# t, c7 f- O* Z' M4 c! ~
terone gel, which he concealed at first visit. He was
) G1 [6 S' Y5 ousing it rather frequently, twice a day. The Physicians’9 t% w4 ^8 \. j% k; `6 o
Desk Reference, or package insert of this product, gel or# G7 u, E: z0 ]; b( U1 G4 S
cream, cautions about dermal testosterone transfer to
% @. P- O" O2 ~& xunprotected females through direct skin exposure." {: E3 t" G9 N. e( g: S0 S, K5 T y+ R
Serum testosterone level was found to be 2 times the
W( {% o# o. e! w4 U; M4 vbaseline value in those females who were exposed to
# v# e1 \2 t4 g8 k3 Q0 Z4 d/ F3 j4 oeven 15 minutes of direct skin contact with their male
1 N7 A u* I! c" Dpartners.6 However, when a shirt covered the applica-$ w/ e# V% ^. I2 g9 }1 }4 @4 x
tion site, this testosterone transfer was prevented.: R$ t5 ?- V) z) Q/ D
Our patient’s testosterone level was 60 ng/mL,
c( F0 Y2 g) ^ a) ~* P% G9 ?" P- wwhich was clearly high. Some studies suggest that: b( F8 P4 D6 d- t' w- x4 Y4 }
dermal conversion of testosterone to dihydrotestos- y3 c* i2 b3 l/ a. R
terone, which is a more potent metabolite, is more
4 D" d) i" i' N) l8 wactive in young children exposed to testosterone
# W8 i( O, Y$ r, ], v2 uexogenously7; however, we did not measure a dihy-3 N a1 r; b$ g. k/ C. P/ P0 n
drotestosterone level in our patient. In addition to- n, z, o+ \3 }& C# n# u- g& u6 A
virilization, exposure to exogenous testosterone in
2 {- x% t5 ^ X: A# J' q7 ~4 n. q# _" ichildren results in an increase in growth velocity and! u& ?5 n1 z9 \" I
advanced bone age, as seen in our patient.
) U- j3 m# r; q7 O( v% ]The long-term effect of androgen exposure during
7 o% m6 s' ` t0 a* P5 ~early childhood on pubertal development and final4 s. u' N( j5 N: K+ y# N( i
adult height are not fully known and always remain$ y9 A! P7 M% j
a concern. Children treated with short-term testos-
! z0 ^2 c$ Z j( G& zterone injection or topical androgen may exhibit some' Z2 U9 e2 S$ j. ?# k$ o7 ]% s
acceleration of the skeletal maturation; however, after
; J8 k! ]/ p/ \% J x# S' rcessation of treatment, the rate of bone maturation0 }+ g, t5 X0 e0 {" _
decelerates and gradually returns to normal.8,90 O) w) D, c% ]+ T' Q$ j7 C- i# O
There are conflicting reports and controversy; q, |5 F5 }6 K5 m( t
over the effect of early androgen exposure on adult
- g9 l* z$ S7 l$ i3 Z7 Qpenile length.10,11 Some reports suggest subnormal
$ s0 E% H4 e; P3 ?0 y6 f1 xadult penile length, apparently because of downreg-
8 @. R. T6 d2 T. I/ mulation of androgen receptor number.10,12 However,
- \" s' {% l$ y4 g! Z6 bSutherland et al13 did not find a correlation between0 x0 a9 \ d; B8 Z; y
childhood testosterone exposure and reduced adult
3 ]: k7 U# o: k! c/ cpenile length in clinical studies.% E, K4 F/ K4 i1 T) f
Nonetheless, we do not believe our patient is
( W4 U0 m f# h9 S; V% l- Cgoing to experience any of the untoward effects from: p$ {7 L6 f5 |. n$ e( V
testosterone exposure as mentioned earlier because) I5 q7 O6 F, P% ~0 ]7 O6 F
the exposure was not for a prolonged period of time.
+ z7 l& g* t, }, G' vAlthough the bone age was advanced at the time of4 P2 B! v/ v# q5 m% J( t
diagnosis, the child had a normal growth velocity at
4 b; a, n6 a/ W' X' M! v ]. xthe follow-up visit. It is hoped that his final adult
- ?5 C& `- T, r! t. Y# ^height will not be affected.
1 j( C$ S2 `2 N. \Although rarely reported, the widespread avail-. u7 |6 L* b) s3 Z" X) C3 n9 B; A
ability of androgen products in our society may
1 B2 `9 Q+ T& W) E7 Yindeed cause more virilization in male or female
5 x- Z; E; p! I+ Ychildren than one would realize. Exposure to andro-
, X# E# Y; E& H, P! vgen products must be considered and specific ques-
' [9 L2 L2 t. P% n1 p# Ntioning about the use of a testosterone product or. {$ M8 M: J. v4 \$ C( M& Y
gel should be asked of the family members during4 I M. F, _4 k
the evaluation of any children who present with vir-
' a0 ~: c5 F1 t( @- Ailization or peripheral precocious puberty. The diag-
9 T; v. g. z9 ^) l2 f" B3 @* I' w' Y3 P+ ?nosis can be established by just a few tests and by
* C$ K. b$ I+ ?2 B( C' k( d" }appropriate history. The inability to obtain such a& b7 r- e& S9 P4 C2 ?, z
history, or failure to ask the specific questions, may
/ {9 N4 t' A- K. z9 B! w+ iresult in extensive, unnecessary, and expensive
8 t0 `' P$ h9 B' _! ^( ainvestigation. The primary care physician should be. Z% \% g) D7 |
aware of this fact, because most of these children& E3 ?7 O" k6 j# N2 u5 J7 k
may initially present in their practice. The Physicians’3 N9 c m" u9 @9 ]8 U* p3 \0 _/ m
Desk Reference and package insert should also put a0 u5 @4 \7 [% s, \. _
warning about the virilizing effect on a male or
8 G) G/ |2 }, p/ z7 p. nfemale child who might come in contact with some-8 G7 d8 {& d8 f0 n: k& o
one using any of these products.# v0 K8 X; S1 H- d5 |( `- A
References
& W3 r- i- R8 R4 D' @7 H$ I1. Styne DM. The testes: disorder of sexual differentiation! S, i* S9 }, M* N' g# K
and puberty in the male. In: Sperling MA, ed. Pediatric9 v( q, n6 M' G) y8 D: z
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;+ q6 a2 G# p% I$ I1 l9 H" \
2002: 565-628.5 M) [5 W# N" q4 d5 \
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious0 G& q' h# s% J/ ^' V
puberty in children with tumours of the suprasellar pineal& o! [. d4 L( \# x
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 t! N3 u# s3 R% S9 o' p$ V
Topical Testosterone Exposure / Bhowmick et al 543. W' l. \- q8 W* W2 z
areas: organic central precocious puberty. Acta Paediatr.
7 P& Q' [& X( ?! X8 B2001;90:751-756.
2 \9 w# D/ I* K H# ]3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
0 X% b! K- D, r" F+ N m$ yPediatric Endocrinology. 4th ed. New York, NY: Marcel* s! D8 G9 S3 h$ m
Dekker Inc; 2003:211-238., z. P! c5 r% V5 U/ b# ?
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
0 H- c' ]6 z" N" l v: V) mdevelopment in a two-year-old boy induced by topical" x8 V0 \# m \" l2 n" q
exposure to testosterone. Pediatrics. 1999;104:e23.
$ R1 E1 {6 m* M. f5. Greulich WW, Pyle SI, eds. Radiographic Atlas of0 t, Z$ L3 h* n
Skeletal Development of the Hand and Wrist. 2nd ed.
. Z. _1 A' e' iStanford, CA: Stanford University Press; 1959.3 W0 D* J4 z7 Z. Z6 d' P
6. Physicians’ Desk Reference. Androgel 1% testosterone,8 N) X+ E& V# q r% j& v3 E
Unimed Pharmaceutical Inc. Montvale, NJ: Medical& u, l0 u3 p9 i" j) i6 q- j
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