Pilar and trichodermal cyst
ICD-10 L72.1 is a used to indicate a diagnosis of pilar and trichodermal cyst.
Pilar cysts, also known as trichilemmal cysts, are benign, fluid-filled sacs that typically develop on the scalp. They originate from hair follicle cells and are characterized by a keratin-filled cavity. Clinically, these cysts present as firm, smooth, and mobile nodules, often asymptomatic unless inflamed or infected. The anatomy involved includes the epidermis and dermis, where the cyst forms from the outer root sheath of hair follicles. Disease progression is generally slow, with cysts remaining stable in size; however, they can occasionally become inflamed or rupture, leading to secondary infections. Diagnostic considerations include a thorough clinical examination and, if necessary, imaging studies to differentiate them from other skin lesions. Histological examination may be required for definitive diagnosis, particularly in atypical cases. Pilar cysts are more common in women and may have a genetic predisposition, often appearing in multiple numbers in affected individuals.
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
L72.1 specifically covers pilar cysts, which are benign cysts arising from hair follicles, primarily located on the scalp. They are distinct from other cyst types such as epidermoid cysts and sebaceous cysts.
L72.1 should be used when the diagnosis is confirmed as a pilar cyst. If the cyst is epidermoid or sebaceous, then L72.0 or L72.9 should be used respectively. Accurate diagnosis is crucial for appropriate coding.
Documentation should include a detailed clinical examination note describing the cyst's characteristics, location, and any symptoms. If excision is performed, operative notes and histopathology reports confirming the diagnosis as a pilar cyst are essential.
