Pencil-in-cup is a radiologic sign indicating a deformity where fingers have the appearance of a pencil lying in a cup.[1][2][3] This sign is classically seen in psoriatic arthritis, but it is also reported in systemic sclerosis and rheumatoid arthritis.[4]

References

  1. ↑ Mochizuki, Takeshi; Ikari, Katsunori; Okazaki, Ken (4 November 2018). "Delayed Diagnosis of Psoriatic Arthritis Mutilans due to Arthritis Prior to Skin Lesion". Case Reports in Rheumatology. 2018: e4216938. doi:10.1155/2018/4216938. PMC 6247716. PMID 30533239.
  2. ↑ Laasonen, Leena; Lindqvist, Ulla; Iversen, Lars; Ejstrup, Leif; Jonmundsson, Thorarinn; Ståhle, Mona; Gudbjornsson, Bjorn (1 April 2020). "Radiographic scoring systems for psoriatic arthritis are insufficient for psoriatic arthritis mutilans: results from the Nordic PAM Study". Acta Radiologica Open. 9 (4): 2058460120920797. doi:10.1177/2058460120920797. ISSN 2058-4601. PMC 7218277. PMID 32426163.
  3. ↑ Laasonen, Leena; Gudbjornsson, Björn; Ejstrup, Leif; Iversen, Lars; Ternowitz, Thomas; Ståhle, Mona; Lindqvist, Ulla (6 July 2015). "Radiographic development during three decades in a patient with psoriatic arthritis mutilans". Acta Radiologica Open. 4 (7): 2058460115588098. doi:10.1177/2058460115588098. ISSN 2058-4601. PMC 4548743. PMID 26346445.
  4. ↑ Ramakrishnan, S.; Das, S. K.; Mishra, K. (May 2001). "Systemic sclerosis with pencil‐in‐cup deformity". Rheumatology. 40 (5): 594–595. doi:10.1093/rheumatology/40.5.594. PMID 11371676.
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