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is a significant concern for physicians. Central
5 Q+ k, @. L- @9 a5 M. b0 v/ Lprecocious puberty (CPP), which is mediated" D4 g7 p% @" e2 c8 U
through the hypothalamic pituitary gonadal axis, has
6 ]: u! k2 y5 X7 U$ }$ Ta higher incidence of organic central nervous system$ z5 Z5 e2 L2 f3 F$ ^4 p
lesions in boys.1,2 Virilization in boys, as manifested- T( D6 M* Q. t$ Y' t8 |5 c. d
by enlargement of the penis, development of pubic
3 m1 V4 v! A- c2 dhair, and facial acne without enlargement of testi-
( A7 @1 r3 a" a) b; ~) |" Z! ucles, suggests peripheral or pseudopuberty.1-3 We. ^$ p! C$ `" \
report a 16-month-old boy who presented with the' H* \( A" h$ F. G$ \# v) j
enlargement of the phallus and pubic hair develop-1 K2 W) R3 f, ^
ment without testicular enlargement, which was due
5 j6 o% a2 T+ z* b5 @to the unintentional exposure to androgen gel used by8 C5 |1 k; u1 F3 [# \( @% ~* d
the father. The family initially concealed this infor-% O0 |+ J2 Q6 @6 {
mation, resulting in an extensive work-up for this
, E5 ]" y' M: j- A! \; Mchild. Given the widespread and easy availability of
6 ]3 V S. c. q0 Ntestosterone gel and cream, we believe this is proba-$ O/ z2 H. e- |7 D8 k- g, K
bly more common than the rare case report in the
C6 v! c: ? h9 f2 p( kliterature.4# L; C: j* S3 v* t
Patient Report
/ i+ y% _& n9 l" O' l: vA 16-month-old white child was referred to the b b$ p) z8 C5 n D
endocrine clinic by his pediatrician with the concern
9 Q4 i/ t1 u/ U% o% ?' Lof early sexual development. His mother noticed" e6 o: p% C( E$ ^% W
light colored pubic hair development when he was5 P B0 {$ m8 _8 F" ]
From the 1Division of Pediatric Endocrinology, 2University of
d# A4 Y ~- W/ X- b! X1 hSouth Alabama Medical Center, Mobile, Alabama.
/ J) M* J# Q) J" {0 D1 J/ GAddress correspondence to: Samar K. Bhowmick, MD, FACE,6 N6 k- k" z( o& ~
Professor of Pediatrics, University of South Alabama, College of
/ X* D% r' N c BMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
( M) [2 g) n% L7 z f% ^ de-mail: [email protected].0 F. N# C! X2 }' X& `
about 6 to 7 months old, which progressively became% L2 d5 n' H$ T- n2 ?
darker. She was also concerned about the enlarge-
+ ?+ s: t M" C, C# b' }! bment of his penis and frequent erections. The child. q9 C# y2 f5 {- V- o2 o4 J- p
was the product of a full-term normal delivery, with( |1 C9 x6 r: K; |8 e. i V
a birth weight of 7 lb 14 oz, and birth length of4 X+ R$ a, B" F
20 inches. He was breast-fed throughout the first year+ W( u5 g% v- e! r' w3 o, m
of life and was still receiving breast milk along with5 Z2 C5 h) E" E
solid food. He had no hospitalizations or surgery,5 e' d) P5 G1 q
and his psychosocial and psychomotor development
8 S4 `1 k7 Q5 l+ c owas age appropriate.; G; H: e; `/ [* N% o6 f
The family history was remarkable for the father,
. h6 u; h3 A: L0 H4 uwho was diagnosed with hypothyroidism at age 16, B' j9 s% @0 u9 [6 T
which was treated with thyroxine. The father’s% }- h, s6 l% _/ u
height was 6 feet, and he went through a somewhat
5 A5 V8 b- X, {$ j* R# {: Tearly puberty and had stopped growing by age 14.. \0 @1 D; I: k3 h
The father denied taking any other medication. The6 ^' f& @1 Y7 E% V
child’s mother was in good health. Her menarche9 X0 ~% q% u0 I; f" ]# |; J% R
was at 11 years of age, and her height was at 5 feet! E/ g+ Q7 M$ k& I
5 inches. There was no other family history of pre-7 {2 f W i$ C" ~* J1 j X( ]
cocious sexual development in the first-degree rela-
# {$ O' P, O! C% Ltives. There were no siblings.
; t( T$ F4 d7 P% qPhysical Examination
$ s7 s8 c( _$ u- w7 |) j1 m6 wThe physical examination revealed a very active,; j1 u" H' h, O: o! h0 `
playful, and healthy boy. The vital signs documented
3 u5 h. _1 U* `! {% [a blood pressure of 85/50 mm Hg, his length was
. P$ o; N. y; p9 t" L8 a3 e90 cm (>97th percentile), and his weight was 14.4 kg% D; u& z& }. W' v$ n- X
(also >97th percentile). The observed yearly growth
. t* S3 C6 ]* }4 _velocity was 30 cm (12 inches). The examination of q- T6 [( p: _
the neck revealed no thyroid enlargement.' l1 Z u8 U/ a6 \3 Y2 I
The genitourinary examination was remarkable for
4 e: I: t# ]5 Henlargement of the penis, with a stretched length of& o8 B+ x- t6 P7 m9 V* f" G
8 cm and a width of 2 cm. The glans penis was very well
, D& O3 \' J5 u Pdeveloped. The pubic hair was Tanner II, mostly around9 u1 b/ Y9 ^8 X' ~8 ~$ u8 K
540
' k, P$ s: c/ r: E# T- b" Bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ x. k# i( I* r' ~
the base of the phallus and was dark and curled. The, D: O( e% {4 G9 a
testicular volume was prepubertal at 2 mL each.
4 m- M( \) U) L9 d" xThe skin was moist and smooth and somewhat
* s6 y/ h& Y" r0 Qoily. No axillary hair was noted. There were no
- S/ C* r- z1 ?3 ~/ Wabnormal skin pigmentations or café-au-lait spots.) F' l3 F$ B3 k; }' Y Y
Neurologic evaluation showed deep tendon reflex 2+
; [5 O- o, k/ K% ~* }; k* S; L' Y% Kbilateral and symmetrical. There was no suggestion
1 B! ^: `3 G5 r. d$ B- Iof papilledema.
: J* m5 s) K+ b9 ^! ALaboratory Evaluation. B- G( i# K( L
The bone age was consistent with 28 months by
4 u& }+ i9 }5 f5 Susing the standard of Greulich and Pyle at a chrono-
; B/ @# Y8 W @, d3 ^6 m! Hlogic age of 16 months (advanced).5 Chromosomal
% Y6 f. x" `8 R! v. W8 n+ lkaryotype was 46XY. The thyroid function test3 G M8 W' W7 G! J* s" a" `
showed a free T4 of 1.69 ng/dL, and thyroid stimu-- o, f/ ^7 K) k! V
lating hormone level was 1.3 µIU/mL (both normal).
7 V) J1 |; L% ~; vThe concentrations of serum electrolytes, blood
0 y+ G' m8 {8 ~3 k% ?urea nitrogen, creatinine, and calcium all were% R& y$ i" @# v# F7 M8 b% R
within normal range for his age. The concentration# x$ u) Q( V$ \% B* W" ?& Z
of serum 17-hydroxyprogesterone was 16 ng/dL0 K* p" t/ W: G' A1 a$ v
(normal, 3 to 90 ng/dL), androstenedione was 20
+ O) b [- k) lng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
7 m# N' ^3 J# p& X1 Aterone was 38 ng/dL (normal, 50 to 760 ng/dL),7 b' s$ A) U2 P; J) v8 P
desoxycorticosterone was 4.3 ng/dL (normal, 7 to: {# M5 q2 g' e8 k- _& f5 k
49ng/dL), 11-desoxycortisol (specific compound S)8 I" u/ X5 o! t/ A7 ^7 A: _& P
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
M y& q/ Q5 ?tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total* H: G; \' s! u, j/ y* Z) P
testosterone was 60 ng/dL (normal <3 to 10 ng/dL), a6 O- E, c. F O. n/ S1 [
and β-human chorionic gonadotropin was less than
/ a/ x; z; z- Y1 {' I5 mIU/mL (normal <5 mIU/mL). Serum follicular* ^7 L1 j! h# |! a4 `
stimulating hormone and leuteinizing hormone" ^& N/ k/ G- x$ J: O
concentrations were less than 0.05 mIU/mL
5 N& y" [& E3 S% Z/ C. e, }+ e(prepubertal).# B, Z1 j3 b* ?9 L1 g, R
The parents were notified about the laboratory8 P$ p# z- \+ c$ F! t: m
results and were informed that all of the tests were
- l7 r; S4 x: j3 X. Q1 a0 v) V5 anormal except the testosterone level was high. The
' S1 O0 ]9 R5 [( ?9 Ifollow-up visit was arranged within a few weeks to
* i c$ ^/ Z- n9 |. sobtain testicular and abdominal sonograms; how-
8 q- {% C* f- o1 K: ~ever, the family did not return for 4 months.
4 ]$ b- u' f7 U, H6 }7 M. |Physical examination at this time revealed that the) |" z/ j" }. S% N& y
child had grown 2.5 cm in 4 months and had gained1 d9 J+ G( f7 X, ~
2 kg of weight. Physical examination remained
: q( {. z- p3 Y iunchanged. Surprisingly, the pubic hair almost com-0 H3 u: S% Y' j9 R- r4 `/ f% x n% T5 C
pletely disappeared except for a few vellous hairs at
" B% ~/ b# K, s9 Hthe base of the phallus. Testicular volume was still 29 _% ?6 B2 i% y ] e6 ]( Y
mL, and the size of the penis remained unchanged.
R' Z& M" @/ n8 ^3 V" iThe mother also said that the boy was no longer hav-
; m$ q6 n) B$ }1 Cing frequent erections. s( ^& [. V. `2 E
Both parents were again questioned about use of
9 V8 X6 f; d6 x$ dany ointment/creams that they may have applied to$ b. @1 k) P/ l
the child’s skin. This time the father admitted the
u' ~& N- c* [& `9 I9 s# N* TTopical Testosterone Exposure / Bhowmick et al 541
1 W" L9 t5 p& }7 I: Y* fuse of testosterone gel twice daily that he was apply-
* l7 n% M* ^7 @/ [. Ting over his own shoulders, chest, and back area for
! b$ g1 C5 f0 ^* g. ya year. The father also revealed he was embarrassed
# V7 x1 c' O* F M2 V* H; L* e X+ xto disclose that he was using a testosterone gel pre-# S: b# t0 J% A: p
scribed by his family physician for decreased libido9 R M5 G& b O0 O9 ~. |8 n4 |
secondary to depression.
1 b7 L+ `% C# o6 bThe child slept in the same bed with parents.
& w! k8 W; W+ j) X" v6 p. ]The father would hug the baby and hold him on his
% M* N. I8 H/ L- b5 T' ^; }. k! Cchest for a considerable period of time, causing sig-, [# P3 J/ G) j" i1 K8 g* Y7 B
nificant bare skin contact between baby and father.0 r, M7 c5 ^/ x# L& r: \
The father also admitted that after the phone call,% i/ s2 j! D) b8 q
when he learned the testosterone level in the baby$ w* K% k; S; Y4 W% {/ d0 K/ Y5 O( d
was high, he then read the product information
, P9 F4 ]0 |/ I lpacket and concluded that it was most likely the rea-
) F& }6 V$ g( T! w1 }son for the child’s virilization. At that time, they
/ G [- J2 a, Y$ P9 L5 D- ?1 G0 I/ Gdecided to put the baby in a separate bed, and the
- I5 d" H4 h. p0 Cfather was not hugging him with bare skin and had
. b- N) @( \! ^. wbeen using protective clothing. A repeat testosterone
( F+ I3 Z9 i2 s- ~4 Gtest was ordered, but the family did not go to the+ }/ l/ Y: W* j/ s
laboratory to obtain the test.
1 T( n/ Y% C; s2 m- iDiscussion8 C0 e) n, `8 P$ b4 s# Z1 b
Precocious puberty in boys is defined as secondary
6 D% _6 k7 \$ n$ L! a7 j7 _sexual development before 9 years of age.1,46 r1 O6 H$ O% e$ p
Precocious puberty is termed as central (true) when2 \- d2 c+ o, Y" @
it is caused by the premature activation of hypo-
0 p$ U6 V- \- O1 h Bthalamic pituitary gonadal axis. CPP is more com-, ~8 E8 z- h1 j4 t* d
mon in girls than in boys.1,3 Most boys with CPP: T( e! o+ M( E
may have a central nervous system lesion that is
# ?9 Y5 r+ y3 G' _" c( tresponsible for the early activation of the hypothal-
3 b4 ]: o4 _$ c, b1 Eamic pituitary gonadal axis.1-3 Thus, greater empha-% t" }% Q3 }. v+ Q; P2 Q) c4 c
sis has been given to neuroradiologic imaging in
H) E& y% D5 _3 o9 gboys with precocious puberty. In addition to viril-
" _0 K5 |) L( `( U* h6 u% xization, the clinical hallmark of CPP is the symmet-
, w2 p8 Q* ~$ ^* S' T9 o8 Arical testicular growth secondary to stimulation by4 u6 |5 i8 R2 _- } B# R
gonadotropins.1,3
3 R3 j- M) E e3 Q( y. {* k1 f: }Gonadotropin-independent peripheral preco-
; M7 K! {/ u3 k1 H* i9 h' bcious puberty in boys also results from inappropriate, X8 `9 }+ s" Q8 U. R
androgenic stimulation from either endogenous or
. T/ w3 _# X$ j, \; [7 Vexogenous sources, nonpituitary gonadotropin stim-, x" u- W1 z {2 @
ulation, and rare activating mutations.3 Virilizing
9 N+ `5 t# G* @+ g4 o( @congenital adrenal hyperplasia producing excessive
2 R) e$ [) e, a6 Z+ G# nadrenal androgens is a common cause of precocious' v) e; u4 j7 U: f
puberty in boys.3,4
8 A. `" I* i7 mThe most common form of congenital adrenal
8 ~' ^2 G2 B) G0 H. \hyperplasia is the 21-hydroxylase enzyme deficiency.
" ~$ M9 b' k3 T$ F) ]The 11-β hydroxylase deficiency may also result in
! B0 K/ D0 I1 ]9 S; \/ N. Oexcessive adrenal androgen production, and rarely,
/ h [/ D* @4 t* W( \an adrenal tumor may also cause adrenal androgen+ }& [: t7 W5 b7 g& l% Y* J3 D2 g
excess.1,3
3 U/ v; o, @2 a$ Gat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* |! G8 n. B7 J/ L% s542 Clinical Pediatrics / Vol. 46, No. 6, July 20072 P9 M. S9 R9 k2 e
A unique entity of male-limited gonadotropin-% m: a; {% U2 V. h; ^
independent precocious puberty, which is also known
" s: l$ `8 n2 D- b' o% P6 z7 Ras testotoxicosis, may cause precocious puberty at a
& Q: u- ?5 Q% ?# ivery young age. The physical findings in these boys
- l: p9 t% Y3 n* fwith this disorder are full pubertal development,
6 C9 ?, L* z5 Q4 B! r7 G% mincluding bilateral testicular growth, similar to boys
. f8 v. H$ e2 [4 c) A, Nwith CPP. The gonadotropin levels in this disorder
: W, `3 L5 {; g' Q- e2 bare suppressed to prepubertal levels and do not show
# B% M* e$ l3 _pubertal response of gonadotropin after gonadotropin-+ }9 B% D6 B7 O8 n
releasing hormone stimulation. This is a sex-linked
0 V% M0 t% u% r# n- Bautosomal dominant disorder that affects only
$ U" q$ \3 x% M, b0 J6 b/ J. ?males; therefore, other male members of the family
6 i# X7 }6 L8 H6 T, a% J+ |may have similar precocious puberty.35 c p6 A4 P! k
In our patient, physical examination was incon-, p; g6 A" X9 A& ^; \
sistent with true precocious puberty since his testi-
. V- w: Q0 h, `. Pcles were prepubertal in size. However, testotoxicosis7 U8 T4 \- w) t; ^
was in the differential diagnosis because his father, X2 P# `5 B' d; v' |' k8 t
started puberty somewhat early, and occasionally,0 j. E) i4 \% g" D8 t1 k0 M
testicular enlargement is not that evident in the+ ]! g7 `. z' ?# Q+ b- @+ y! g
beginning of this process.1 In the absence of a neg-; m+ p# N+ i k* x& |
ative initial history of androgen exposure, our
' z+ E" N# \& y% B3 ]biggest concern was virilizing adrenal hyperplasia,/ |' i& w9 O9 J$ |' a
either 21-hydroxylase deficiency or 11-β hydroxylase
& p E4 a9 O3 O; p5 bdeficiency. Those diagnoses were excluded by find-5 V+ H+ ~8 b2 q+ w0 B* \
ing the normal level of adrenal steroids.
# m+ p2 w% q4 g$ j8 o- SThe diagnosis of exogenous androgens was strongly
2 e, p- U1 U% y0 U. Vsuspected in a follow-up visit after 4 months because F- l2 U9 m# e: v# e* ?6 c
the physical examination revealed the complete disap-
& u8 i" e$ R, \; t7 U2 vpearance of pubic hair, normal growth velocity, and1 d+ G# D6 U9 d
decreased erections. The father admitted using a testos-4 k7 O1 y" w* p8 z$ y
terone gel, which he concealed at first visit. He was$ Y4 w: n6 ^5 G" E- L8 [
using it rather frequently, twice a day. The Physicians’, R/ C+ t2 Q- ^6 x, G, R$ g" n
Desk Reference, or package insert of this product, gel or
! f5 R: B5 T* N+ ^, Z& N: _) ucream, cautions about dermal testosterone transfer to9 |- V1 D6 T( e1 G, d
unprotected females through direct skin exposure.3 {5 h' w* v4 K, I; k0 t
Serum testosterone level was found to be 2 times the
7 n6 _2 r0 T( W+ q0 j7 Ybaseline value in those females who were exposed to$ H9 c2 K3 E- {5 `( I4 [
even 15 minutes of direct skin contact with their male: \' [' S$ w- ?/ {, D
partners.6 However, when a shirt covered the applica-: c7 U/ _4 N9 V3 v9 D
tion site, this testosterone transfer was prevented.' Q, g* v, x0 U( E& |( ]
Our patient’s testosterone level was 60 ng/mL,
/ D& p# I: G1 s7 r( g- @9 @which was clearly high. Some studies suggest that1 ~* `6 G6 u) l
dermal conversion of testosterone to dihydrotestos-
& [8 m) v! X0 \terone, which is a more potent metabolite, is more
, y( a) p$ Y$ @. [- @5 V5 m5 Jactive in young children exposed to testosterone* f0 c7 g# O) w* V5 C0 ?3 B
exogenously7; however, we did not measure a dihy-
* {/ y8 g( A0 w4 gdrotestosterone level in our patient. In addition to( [- m; N1 @( {3 }2 l a( r I( R
virilization, exposure to exogenous testosterone in
. b# D E9 \. _& lchildren results in an increase in growth velocity and
- j( w+ }8 c5 a2 w6 \' d0 fadvanced bone age, as seen in our patient.
8 q1 b7 b: I0 |: u, k0 aThe long-term effect of androgen exposure during, G$ Q& e, x. [" Y0 L' r; W+ u
early childhood on pubertal development and final
* V- _! f+ K% {$ R6 X" Madult height are not fully known and always remain
$ x! \9 [4 w, W, O" z2 E. Fa concern. Children treated with short-term testos-, G) R) r# M- ^" y
terone injection or topical androgen may exhibit some
! ]! N+ ?- |( R7 x* O' O) iacceleration of the skeletal maturation; however, after( i* m! l2 H) p" f! G
cessation of treatment, the rate of bone maturation7 f; V4 ^! J- K# t2 q' l( y7 u
decelerates and gradually returns to normal.8,9* T; K: r2 m) o6 h/ G7 L
There are conflicting reports and controversy0 C* G2 x* Z1 O7 R- Y
over the effect of early androgen exposure on adult
9 b4 z( x( I$ W" |% V8 {' dpenile length.10,11 Some reports suggest subnormal5 d6 Z# `6 ] u- {: K
adult penile length, apparently because of downreg-
: ^1 r7 o ^; a' pulation of androgen receptor number.10,12 However,
, ]% r' `- U( ASutherland et al13 did not find a correlation between
* f8 @. ~' q8 {5 F' fchildhood testosterone exposure and reduced adult, J: b* b# z' u+ p
penile length in clinical studies.3 C9 k9 X6 `* S# G+ c
Nonetheless, we do not believe our patient is
: f* x! O, g8 C$ bgoing to experience any of the untoward effects from' O% s, C6 L3 M {8 h
testosterone exposure as mentioned earlier because
$ a( Q9 [$ V5 Q3 L3 F8 tthe exposure was not for a prolonged period of time.8 ]* e& R' U1 ~
Although the bone age was advanced at the time of
2 I+ L$ _0 T- j5 ?) ]3 W( |diagnosis, the child had a normal growth velocity at6 \3 Z$ t( |' k5 k) R
the follow-up visit. It is hoped that his final adult: P! s6 ^2 c3 h. ]3 X
height will not be affected.
7 I; ]; J( F S% N) f3 XAlthough rarely reported, the widespread avail-
2 X" a0 o" O' u9 l: O0 Kability of androgen products in our society may$ {. F6 c; O3 V, H: ?
indeed cause more virilization in male or female
# K4 |. E! Z. e2 i' Nchildren than one would realize. Exposure to andro-/ |. {, i3 S. v; C" w: k: {8 p
gen products must be considered and specific ques- N x4 j/ U$ R! {
tioning about the use of a testosterone product or$ J% T/ Q- E9 c: H) S2 o Q) G2 X
gel should be asked of the family members during/ X6 i! [" p$ y! \
the evaluation of any children who present with vir-6 r- {$ i" w8 w$ n4 f8 y* I
ilization or peripheral precocious puberty. The diag-) i; B$ x$ \! `
nosis can be established by just a few tests and by! e6 n# ^/ C) a
appropriate history. The inability to obtain such a
# w7 O+ \5 d/ \ ~history, or failure to ask the specific questions, may
3 h: v8 x0 @" z! U2 L2 s* ?) lresult in extensive, unnecessary, and expensive C2 y: K/ W& C8 G1 W; V
investigation. The primary care physician should be; ?" D6 Y) E% B; C
aware of this fact, because most of these children8 } A# t3 o$ G5 g* x- ~" c
may initially present in their practice. The Physicians’
1 w; ^5 Q* w* L1 X4 iDesk Reference and package insert should also put a
+ T: k/ A6 v" t( @5 h5 v/ w2 iwarning about the virilizing effect on a male or
4 W+ x/ B9 \' }female child who might come in contact with some-
! n2 @: @) N6 F0 e8 P% q; uone using any of these products.
! F: w" w1 Z2 n- {/ i8 z3 u3 TReferences8 p5 |3 `! ?8 D0 p. z
1. Styne DM. The testes: disorder of sexual differentiation$ Z' G+ S- t2 N- |' ~. O |" G# B
and puberty in the male. In: Sperling MA, ed. Pediatric' i6 b8 W6 J! O$ G( m# m8 ]6 X
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;- G" q+ j# M& E( u
2002: 565-628.
$ p$ ^ ^& P2 ^2 k2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious! ?" V! u1 J6 J; m) }" X6 R
puberty in children with tumours of the suprasellar pineal
% c( g! t- q. F. `at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! J: q8 {$ L; o8 |Topical Testosterone Exposure / Bhowmick et al 543
% y+ u+ M7 N' x( N7 L6 y' Bareas: organic central precocious puberty. Acta Paediatr.$ P( s$ e8 ^5 @% {
2001;90:751-756.. {; V. x2 F5 C
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
" d8 N" g2 E; w3 l8 o N: @3 PPediatric Endocrinology. 4th ed. New York, NY: Marcel
1 ?( ~ w$ M( {% WDekker Inc; 2003:211-238.8 F2 H; T6 T& {, T" J4 [8 {
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
- X: s# [. a( S5 m) J; _* Ldevelopment in a two-year-old boy induced by topical4 t/ A, p. |: V- a" v& y
exposure to testosterone. Pediatrics. 1999;104:e23.
' T) V N2 h3 S5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
f/ t& A1 E2 W( X' u# B H3 GSkeletal Development of the Hand and Wrist. 2nd ed.& R+ b* u" K5 O `! @+ P, j
Stanford, CA: Stanford University Press; 1959., i q0 ^9 W. h7 S2 f! {9 q& T1 ^
6. Physicians’ Desk Reference. Androgel 1% testosterone,
! X1 G3 r% w) a& zUnimed Pharmaceutical Inc. Montvale, NJ: Medical5 @2 F2 x0 M) c* L1 z
Economics Company, Inc; 2004:3239-3241.
0 U+ X) L9 l9 |- S7. Klugo RC, Cerny JC. Response of micropenis to topical) T) y$ R; w- U0 S4 C
testosterone and gonadotropin. J Urol. 1978;119:
4 T7 z' l `# P, m; b* v667-668. @+ F3 h1 S+ u% B/ I0 W* n
8. Guthrie RD, Smith DW, Graham CB. Testosterone6 p. |+ `2 K1 c: Q/ F
treatment for micropenis during early childhood. J Pediatr.
) d2 m, ^+ o! e) c' w1973;83:247-252.
$ h- m0 A; y1 b" u2 A9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone' ?& x; u8 {7 O0 }
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