Acta Dermato-Venereologica 98-8CompleteContent | Page 33

QUIZ SECTION Coccygeal Nodule in an Infant: A Quiz Kazumasa OYA, Yosuke ISHITSUKA and Manabu FUJIMOTO Department of Dermatology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan. E-mail: yosuke. [email protected] An otherwise-healthy, 15-month-old girl was referred to our clinic with a nodule in the coccygeal region that had been noticed one month after birth and had gradually enlarged with no associated symptoms. The nodule was solitary, linear-shaped, red-coloured, with a papillomatous appearance, 15 × 4 × 5 mm in size (Fig. 1a). Detailed visual examination and dermoscopy revealed aggregated pearly- white, oval-shaped, amorphous structures occasionally surrounded by telangiectasia in an oedematous stroma (Fig. 1b). Laboratory tests revealed no signs of sexually trans- mitted diseases, including hepatitis B, syphilis or HIV. No similar lesions were found in her guardians. What is your diagnosis? See next page for answer. Fig. 1. (a) Solitary, linear-shaped, red-coloured protrusion with a papillomatous appearance 15×4×5 mm in size in the coccygeal region. (b) Dermoscopy revealed aggregation of pearly-white, oval-shaped amorphous structures occasionally surrounded by telangiectasia in an oedematous stroma. 824 doi: 10.2340/00015555-2955 Acta Derm Venereol 2018; 98: 824–825 This is an open access article under the CC BY-NC license. www.medicaljournals.se/acta Journal Compilation © 2018 Acta Dermato-Venereologica.