Cutaneous metaplastic synovial cyst (CMSC) refers to a cyst lined by metaplastic synovial tissue including villous structures. It is thought to be a tissue reaction to local trauma, and most cases have a history of preceding surgery or trauma. Clinically, most of the lesion is a tender intradermal nodule that is associated with scar tissue. However, dermatologists have difficulty in diagnosing ...

Neck masses in children can be inflammatory, congenital or neoplastic. When a congenital cyst becomes infected repeatedly, it may mimic inflammatory disease and the diagnosis may be challenging with ultrasound. An increasing incidence of infection with non-tuberculous mycobacterial organisms has been observed in recent decades in children with cervical lymphadenopathy. An ultrasound scan perfor...

Epidermal cyst arising from breast is an uncommon benign condition. Its rarity accounts for it being erroneously misdiagnosed. The patient may not seek medical attention because of small painless swelling, unless the lump increases in size or becomes painful. Symptomatic cases should be readily excised and need histological correlation to rule out any potential complications that can arise in t...