Online Images in the Medical Sciences| Volume 364, ISSUE 4, e17-e18, October 2022

Dermoid cyst of the left upper limb: A common case in a rare site

      An 83-year-old male patient had undergone surgical removal of a mass in his left upper arm 5 years ago, but its specific diagnosis was unknown. Two years ago, the mass recurred. The mass was associated with pain, redness, swelling, and elevated skin temperature for a month. Palpation revealed a soft mass and plain magnetic resonance imaging (MRI) showed an oval-shaped mass with an abnormal signal behind the triceps at the proximal end of the left upper arm, with a size of 6.5 × 7.4 × 12.5 cm, and equal or slightly low signal on T1-weighted images and mixed high signal on T2-weighted and short tau inversion recovery images. There were multiple hairline, flocculent, low-intensity lesions on short tau inversion recovery images, with low-intensity surrounding the lesion on each sequence and adjacent muscles appearing pushed and deformed. Multiple lymph nodes in the left axilla were enlarged, and no abnormal signals were found in relation to the left humerus (Fig. 1A–D). A dermoid cyst was diagnosed based on pathological examination (Fig. 2).
      To read this article in full you will need to make a payment

      Purchase one-time access:

      Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online access
      One-time access price info
      • For academic or personal research use, select 'Academic and Personal'
      • For corporate R&D use, select 'Corporate R&D Professionals'


      Subscribe to The American Journal of the Medical Sciences
      Already a print subscriber? Claim online access
      Already an online subscriber? Sign in
      Institutional Access: Sign in to ScienceDirect


        • Dahan H
        • Arrivé L
        • Wendum D
        • et al.
        Retrorectal developmental cysts in adults: clinical and radiologic-histopathologic review, differential diagnosis, and treatment.
        Radiographics. 2001 May-Jun; 21: 575-584
        • Sloan M
        • Fantus RJ
        • Paner GP
        • et al.
        Perineal dermoid cyst in a young male.
        Urol Case Rep. 2020 Jul 22; 33101358
        • Ha DL
        • Kim TR
        • Shin K
        • et al.
        Ultrasonographic findings of pediatric dermoid cyst.
        Pediatr Int. 2020 Jul 24;