Retronychia—an uncommon cause of chronic proximal nail fold inflammation

Common diseases of the nail: Diagnosis and therapy

“…Typical clinical signs of retronychia include halted growth, swelling of the proximal nail groove, and lack of response to antibiotics which will usually have been prescribed as a matter of course (Figure 7a, b). Careful avulsion of the nail plate used to be the established treatment of choice, since it constitutes a definitive treatment and will alleviate the sometimes significant pain [62,63]. Meanwhile, studies with topical and intralesional steroids have shown that this treatment can help to avoid surgery if used in early stages of the condition [64][65][66].…”

Häufige Nagelerkrankungen: Diagnostik und Therapie

“…Typische klinische Zeichen der Retronychie sind Wachstumsstopp, Schwellung des proximalen Nagelfalzes und ein fehlendes Ansprechen auf die meist bereits reflexartig erfolgte Gabe von Antibiotika (Abbildung 7a, b). Als definitive und von den teils erheblichen Schmerzen befreiende Therapie hatte sich zunächst die schonende Avulsion der Nagelplatte etabliert [62,63]. Inzwischen gibt es Erfahrungen mit der topischen und intraläsionalen Behandlung mit Steroiden, die in frühen Stadien helfen können, operative Maßnahmen zu vermeiden [64][65][66].…”

S1 Guideline onychomycosis

“…The congenital onychodystrophies include: brachyonychia, twenty‐nail dystrophy (or trachyonychia; congenital in a minority and can also be acquired), nail‐patella syndrome ( LMX1B gene), and pachyonychia congenita 28,29 . Acquired nail conditions include: yellow nail syndrome, 30 , retronychia, 31 , onychodystrophy with alopecia areata, subungual tumors, and melanonychia; psoriasis of the nails was mentioned above. Finally, green nails due to Pseudomonas aeruginosa , klebsiellas, or other gram‐negative bacteria with greenish pigmentation of the nails that sometimes assumes a brownish black hue, are not always easy to distinguish from onychomycosis 32,33 .…”