section of skin with cyst, subcutaneous swelling. pilar cyst and sebaceous cyst

abscess atheroma cancer care chest cyst dermatologist dermatology dermoid disease epidermal epidermoid follicle gland hair head health histology inclusion infection inflammation isthmuscatagen keratin knot lipid lipoma medical pain pathology pilar pimple rendering renderingn ruler ruptured sebaceous sebum section shoulder size skin subcutaneous swelling trichilemmal tumor