Abstract
Background: Cystic lesions of the skin and soft tissue are often neglected and thought to be innocuous or harmless. These lesions need to be excised to exclude malignancy. The lesions may present in unusual sites and may also be of infective origin. Thus, there is an urgent need to determine the prevalence and identify the histopathological features of the cystic lesions as the innocuous appearing lesions may actually not be so innocuous. In addition, it is the histopathological features that determine the treatment modality.
 Aim: To determine the features and prevalence of the types of cysts in skin and soft tissue.
 Materials and Methods: A retrospective study of the cystic lesions of the skin and soft tissue was conducted. The records from the Department of Pathology, Saveetha Medical College were retrieved and reviewed for patients with cystic lesions of the skin and soft tissue over a one year period extending between January 2019 and December 2019. The records were examined for the following data : age, sex, type of lesion, clinical and histopathological diagnosis.
 Results: In all 109 cases with skin and soft tissue swellings were analyzed. Among these 53 were males and 56 were more females reported (51 %) of cystic swellings as compared to males (48%). Cystic lesions were most commonly encountered in the age group of 18 to 40 years, which suggests that there may be a role for trauma or occupation related occurrence. A variety of cysts were encountered such as epidermoid cysts (70%), Trichilemmal cyst (7%), and Ganglion (7%).Phaeohyphomycotic cyst, mucous retention cyst, hemangioma and pilomatrixoma. Epidermal cysts were more frequently encountered in males (54%) than females (46%).Most lesions occurred in the back.
 Conclusion: Epidermal cysts may frequently be associated certain syndromes, hence it is important to evaluate these cysts. In addition phaeohyphomycotic cysts may be mistaken for Ganglion, so histopathological examination is necessary to initiate appropriate therapy.
Highlights
What was analyzed?Skin and soft tissue swellings tend to be often neglected unless they cause cosmetic disfigurement
Cystic lesions were most commonly encountered in the age group of 18 to 40 years, which suggests that there may be a role for trauma or occupation related occurrence
A variety of cysts were encountered such as epidermoid cysts (70%), Trichilemmal cyst (7%), and Ganglion (7%).Phaeohyphomycotic cyst, mucous retention cyst, hemangioma and pilomatrixoma
Summary
What was analyzed?Skin and soft tissue swellings tend to be often neglected unless they cause cosmetic disfigurement. The most common skin and soft tissue swelling that is encountered in clinical practice is the epidermoid cyst [2]. These cysts may sometimes be found in unusual sites in the body such as sole of foot [3]. Cystic lesions of the skin and soft tissue are often neglected and thought to be innocuous or harmless. These lesions need to be excised to exclude malignancy. Aim: To determine the features and prevalence of the types of cysts in skin and soft tissue. The records were examined for the following data : age, sex, type of lesion, clinical and histopathological diagnosis
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