title: A rare cause of recalcitrant coccydynia: benign dermoid cyst masquerading as coccygeal pain.
abstract: Coccydynia is a common entity in orthopedic practice, and various etiologies have been described for it. However, benign dermoid cyst causing coccydynia has not yet been reported.
  
  
  
  A 20-year-old male presented with typical symptoms of coccydynia recalcitrant to conservative treatment for 2 years. Since pain interfered with his daily activities, magnetic resonance imaging was performed which showed a circumscribed precoccygeal cystic lesion.
  
  
  
  The patient underwent coccygectomy along with cyst excision. Histological examination revealed features of benign dermoid cyst. After surgery, the patient had excellent relief of his symptoms.
  
  
  
  The case report identifies that the treating surgeon should be aware of benign dermoid cyst as one of the treatable but rare causes of intractable coccydynia, and MRI should be performed in patients with persistent coccygeal pain.
authors.affiliation: Orthopedics Department, Ganga Hospital, 313, Mettupalayam Road, Coimbatore, Tamil Nadu, 641043, India.
authors.forename: Chandrasekhar V
authors.initials: CV
authors.lastname: Gaike
authors.affiliation: Orthopedics Department, Ganga Hospital, 313, Mettupalayam Road, Coimbatore, Tamil Nadu, 641043, India.
authors.forename: Rishi M
authors.initials: RM
authors.lastname: Kanna
authors.affiliation: Orthopedics Department, Ganga Hospital, 313, Mettupalayam Road, Coimbatore, Tamil Nadu, 641043, India.
authors.forename: Ajoy P
authors.initials: AP
authors.lastname: Shetty
authors.affiliation: Orthopedics Department, Ganga Hospital, 313, Mettupalayam Road, Coimbatore, Tamil Nadu, 641043, India. sr@gangahospital.com.
authors.forename: S
authors.initials: S
authors.lastname: Rajasekaran
mesh_terms: D003050:Coccyx / Q000000981:diagnostic imaging* / Q000601:surgery; D003884:Dermoid Cyst / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D006801:Humans; D017116:Low Back Pain / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D011859:Radiography; D055815:Young Adult
keywords: Benign dermoid cyst; Coccydynia; Coccygectomy; Magnetic resonance imaging