Differential Diagnosis for the Given Condition
The provided information describes a relatively symmetric right paramidline uterus with a cyst-like low-density solid lesion in the left adnexa. Based on this, the differential diagnoses can be categorized as follows:
- Single Most Likely Diagnosis
- Benign Ovarian Cyst: This is the most likely diagnosis given the description of a cyst-like low-density solid lesion in the left adnexa. The fact that its appearance is unchanged compared to a prior study suggests a benign nature.
- Other Likely Diagnoses
- Functional Ovarian Cyst: These are common in women of reproductive age and can appear as low-density lesions on imaging.
- Dermoid Cyst (Mature Cystic Teratoma): Although less common, dermoid cysts can present as low-density lesions due to their fat content and are a consideration in the differential diagnosis of adnexal masses.
- Do Not Miss Diagnoses
- Ovarian Torsion: Although the lesion's unchanged appearance makes this less likely, ovarian torsion is a medical emergency that can present with a similar appearance, especially if the torsion is intermittent or partial.
- Ovarian Cancer: While less likely given the stable appearance over time, ovarian cancer must be considered, especially in older patients or those with risk factors.
- Rare Diagnoses
- Ovarian Fibroma: A rare, benign tumor of the ovary that could present as a solid lesion.
- Germ Cell Tumor: Rare tumors that can occur in the ovaries, presenting as solid or mixed solid and cystic lesions.
The ICD-10 code for a benign ovarian cyst, which is the single most likely diagnosis based on the provided information, is N83.0 (Follicular cyst of ovary). However, the final diagnosis and appropriate ICD-10 code should be determined by a healthcare professional after a thorough evaluation and consideration of the patient's complete clinical picture.