Lung schwannomas, an unusual entity: A series of five cases.

Schwannomas are benign slow-growing tumours arising from the Schwann cells of the nerve sheath. They may arise anywhere in the course of the nerves in the body. The clinical presentations are non-specific, and when present in rare locations such as lungs, the diagnosis becomes difficult. The present case series describes the clinical presentation and diagnosis of five cases of lung schwannoma. The diagnosis was mainly assisted by the immuno-histochemical examination comprising markers such as S-100, Calretinin, CD34, CD56, Desmin, and EMA. A definitive diagnosis of benign nerve tumours in such rare locations may help in better pre-operative assessment and surgery for complete recovery of the patients.