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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Case Report</span><p id="par0005" class="elsevierStylePara elsevierViewall">A 76-year-old patient complained an asymptomatic lesion for more than 6 months&#44; consisting of a normochromic plaque on the lower back&#44; somewhat papillomatous with a slightly erythematous center &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#44; with peripheral white striae and microulcerations on dermoscopy &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46; Histopathological examination showed an epithelial basaloid proliferation with a focally reticulate pattern &#40;<a class="elsevierStyleCrossRefs" href="#fig0015">Figs&#46; 3 and 4</a>&#41;&#46; The excision of the lesion was performed&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="fig0010"></elsevierMultimedia><elsevierMultimedia ident="fig0015"></elsevierMultimedia><elsevierMultimedia ident="fig0020"></elsevierMultimedia></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">What&#8217;s your diagnosis&#63;</span><p id="par0010" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">a&#41;</span><p id="par0015" class="elsevierStylePara elsevierViewall">Seborrheic keratosis</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">b&#41;</span><p id="par0020" class="elsevierStylePara elsevierViewall">Fibroepithelioma of Pinkus</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">c&#41;</span><p id="par0025" class="elsevierStylePara elsevierViewall">Superficial basal cell carcinoma</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">d&#41;</span><p id="par0030" class="elsevierStylePara elsevierViewall">Trichoblastoma</p></li></ul></p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Discussion</span><p id="par0035" class="elsevierStylePara elsevierViewall">Fibroepithelioma of Pinkus &#40;FeP&#41; is considered an uncommon type of basal cell carcinoma &#40;BCC&#41;&#44; first described by Hermann Pinkus in 1953&#44; who named it a premalignant variant of basal cell epithelioma&#44; and similar to trichoblastomas regarding their degrees of differentiation&#46;<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#44;2</span></a> Therefore&#44; some researchers have claimed that both BCC and trichoblastomas can be better classified as opposing representatives of the same spectrum of differentiation&#44; with FeP deserving an intermediate classification within this fine line&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">It is more often reported in females &#40;54&#37;&#41; and the elderly<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> and is probably underreported&#46; It presents clinically as normochromic&#47;brown single or multiple lesions&#44; such as papules or plaques&#44; dome-shaped or sessile&#44; which can mimic benign skin lesions that would not be routinely excised or biopsied&#44; such as pedunculated fibroma&#44; acrochordon&#44; seborrheic keratosis&#44; and dermal nevus&#46;<a class="elsevierStyleCrossRefs" href="#bib0020"><span class="elsevierStyleSup">4&#44;5</span></a> It affects non-photoexposed areas such as the lumbosacral and abdominal region&#44; groin&#44; and foot&#46; On dermoscopy&#44; thin branched vessels&#44; punctiform vessels&#44; white septal striae&#44; corneal pseudocysts&#44; and ulcerations are observed&#46; Some lesions show structureless gray-brown pigmentation and bluish-gray dots&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">Histopathological examination is crucial for the diagnosis as it reveals thin strands of basaloid cells surrounded by stroma&#44; which form a uniform border with the underlying dermis in a fenestrated&#44; 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with fine arboriform vessels&#44; crown vessels&#44; and pearly white background on dermoscopy&#44; with a fibrocystic stroma&#44; formation of follicular bulbs and papillae on histopathology&#46;<a class="elsevierStyleCrossRefs" href="#bib0010"><span class="elsevierStyleSup">2&#44;8</span></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Financial support</span><p id="par0060" class="elsevierStylePara elsevierViewall">None declared&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Authors&#8217; contributions</span><p id="par0070" class="elsevierStylePara elsevierViewall">Nicole Baldin&#58; Drafting and editing of the manuscript&#59; critical review of the literature&#59; approval of the final version of the manuscript&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">Gabriela Galv&#227;o Santos&#58; Drafting and editing of the manuscript&#59; 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Vol. 97. Núm. 4.
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Vol. 97. Núm. 4.
Páginas 508-510 (1 julho 2022)
What is your diagnosis?
Open Access
Case for diagnosis. Fibroepithelioma of Pinkus in a 76-year-old patient
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Nicole Baldina,
Autor para correspondência
nicolebaldin2@gmail.com

Corresponding author.
, Gabriela Galvão Santosb, Paulo Ricardo Martins Souzab, Laura Luzzattob
a Faculty of Medicine, Universidade Franciscana, Santa Maria, RS, Brazil
b Dermatology Outpatient Clinic, Hospital Santa Casa de Misericórdia em Porto Alegre, Porto Alegre, RS, Brazil
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Case Report

A 76-year-old patient complained an asymptomatic lesion for more than 6 months, consisting of a normochromic plaque on the lower back, somewhat papillomatous with a slightly erythematous center (Fig. 1), with peripheral white striae and microulcerations on dermoscopy (Fig. 2). Histopathological examination showed an epithelial basaloid proliferation with a focally reticulate pattern (Figs. 3 and 4). The excision of the lesion was performed.

Figure 1.

Normochromic papillomatous plaque with a slightly erythematous center.

(0.15MB).
Figure 2.

Dermoscopy showing the presence of white striae and microulcerations.

(0.07MB).
Figure 3.

Long, thin, branched and anastomosed epithelial strands of basaloid cells originating from the epidermis embedded in a fibrous stroma. (Hematoxylin & eosin, ×100).

(0.15MB).
Figure 4.

Epithelial cell clusters arranged in palisade can be seen along the epithelium, like “buds on a branch”. (Hematoxylin & eosin, ×400).

(0.13MB).
What’s your diagnosis?

  • a)

    Seborrheic keratosis

  • b)

    Fibroepithelioma of Pinkus

  • c)

    Superficial basal cell carcinoma

  • d)

    Trichoblastoma

Discussion

Fibroepithelioma of Pinkus (FeP) is considered an uncommon type of basal cell carcinoma (BCC), first described by Hermann Pinkus in 1953, who named it a premalignant variant of basal cell epithelioma, and similar to trichoblastomas regarding their degrees of differentiation.1,2 Therefore, some researchers have claimed that both BCC and trichoblastomas can be better classified as opposing representatives of the same spectrum of differentiation, with FeP deserving an intermediate classification within this fine line.1

It is more often reported in females (54%) and the elderly3 and is probably underreported. It presents clinically as normochromic/brown single or multiple lesions, such as papules or plaques, dome-shaped or sessile, which can mimic benign skin lesions that would not be routinely excised or biopsied, such as pedunculated fibroma, acrochordon, seborrheic keratosis, and dermal nevus.4,5 It affects non-photoexposed areas such as the lumbosacral and abdominal region, groin, and foot. On dermoscopy, thin branched vessels, punctiform vessels, white septal striae, corneal pseudocysts, and ulcerations are observed. Some lesions show structureless gray-brown pigmentation and bluish-gray dots.6

Histopathological examination is crucial for the diagnosis as it reveals thin strands of basaloid cells surrounded by stroma, which form a uniform border with the underlying dermis in a fenestrated, honeycomb-like pattern.7,8

Treatment consists of the surgical excision of the lesion. The prognosis is good, with low local aggressiveness and low risk for metastasis.9

Regarding the above mentioned differential diagnoses, seborrheic keratosis is a benign, rounded, or irregular lesion with a brownish or black color, affecting mainly the face and trunk.2 Superficial basal cell carcinoma more commonly affects the face and neck, presents wide branched vessels on dermoscopy, and is less differentiated on histopathology, not fenestrated.5 Trichoblastoma is a rarer tumor, with fine arboriform vessels, crown vessels, and pearly white background on dermoscopy, with a fibrocystic stroma, formation of follicular bulbs and papillae on histopathology.2,8

Financial support

None declared.

Authors’ contributions

Nicole Baldin: Drafting and editing of the manuscript; critical review of the literature; approval of the final version of the manuscript.

Gabriela Galvão Santos: Drafting and editing of the manuscript; critical review of the literature; approval of the final version of the manuscript.

Paulo Ricardo Martins Souza: Drafting and editing of the manuscript; critical review of the literature; approval of the final version of the manuscript.

Laura Luzzatto: Anatomopathological evaluation; intellectual participation in the propaedeutic conduct; approval of the final version of the manuscript.

Conflicts of interest

None declared.

References
[1]
H. Pinkus.
Premalignant fibroepithelial tumors of skin.
AMA Arch Derm Syphilol, 67 (1953), pp. 598-615
[2]
H. Pinkus.
Epithelial and fibroepithelial tumors.
[3]
E.S. Haddock, P.R. Cohen.
Fibroepithelioma of Pinkus Revisited.
Dermatol Ther (Heidelb), 6 (2016), pp. 347-362
[4]
C. Reggiani, I. Zalaudek, S. Piana, C. Longo, G. Argenziano, A. Lallas, et al.
Fibroepithelioma of Pinkus: case reports and review of the literature.
Dermatology, 226 (2013), pp. 207-211
[5]
M. Tarallo, E. Cigna, P. Fino, L.F. Torto, F. Corrias, N. Scuderi.
Fibroepithelioma of Pinkus: variant of basal cell carcinoma or trichoblastoma? Case report.
G Chir, 32 (2011), pp. 326-328
[6]
M.M. Mihai, C. Voicu, M. Lupu, N. Koleva, J.W. Patterson, T. Lotti, et al.
Fibroepithelioma of Pinkus (FeP) Located in the Left Lower Quadrant of the Abdomen-Case Report and Review of the Literature.
Open Access Maced J Med Sci, 5 (2017), pp. 439-444
[7]
B.A. Badaró, L.M. Diniz, E. Negris Neto, E.A. Lucas.
Múltiplos fibroepiteliomas de Pinkus após radioterapia.
An Bras Dermatol, 94 (2019), pp. 633-635
[8]
A.B. Ackerman, G.J. Gottlieb.
Fibroepithelial tumor of Pinkus is trichoblastic (basal-cell) carcinoma.
Am J Dermatopathol, 27 (2005), pp. 155-159
[9]
P.R. Cohen, J.A. Tschen.
Fibroepithelioma of Pinkus presenting as a sessile thigh nodule.

Study conducted at the Ambulatório de Dermatologia, Hospital Santa Casa de Misericórdia em Porto Alegre, Porto Alegre, RS, Brazil.

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