Osteochondromas are benign (non-cancerous) tumors that develop on the surface of a bone near the growth plate during childhood or adolescence. Most often, osteochondromas affect the long bones in the pelvis, the leg, or the shoulder blade.

The tympanic cavity is a small cavity surrounding the bones of the middle ear. The mastoid is the part of the skull located behind the ear. It is filled with air cells made of bone and looks like a honeycomb. In the absence of recent injury, if the tympanic/mastoid cavity is noted to be opacified on imaging studies, it usually reflects chronic inflammation and/or infection.

Nasopharyngeal cysts are fluid collections that are usually benign (non-cancerous). Symptoms that may occur include nasal/sinus symptoms such as runny nose, headache and nasal obstruction. While asymptomatic cysts do not require treatment, marsupialization (a surgical procedure to remove the cyst) may be indicated for those that cause symptoms.

Dermoid cysts (also known as dermoid tumors or teratomas) can contain tissue, such as hair, skin or teeth, because they form from embryonic cells. They are rarely cancerous and are the most common ovarian tumor in women in their 20s and 30s. Uncomplicated ovarian dermoid cysts are usually asymptomatic. If they become large, it can cause ovarian torsion (painful twisting of the ovary) and even stop blood flow to the ovary.

An ovarian endometrioma is a non-cancerous cystic mass within the ovary. It contains thick, brown, tar-like fluid (old blood) which may be referred to as a "chocolate cyst." The exact cause of the cyst is unknown and affects approximately 5–10% of women of reproductive age in the United States. Symptoms include chronic pelvic pain, dysmenorrhea (menstrual pain), dyspareunia (pain with sexual intercourse) and/or infertility. The goals of endometrioma treatment are to relieve symptoms, prevent complications related to the ovarian mass (i.e. rupture or torsion), exclude malignancy, improve subfertility (delay in conceiving), and preserve ovarian function.

Ovarian lesions are common findings and may be incidentally detected on imaging (found in passing when looking for something else). Ovarian lesions may be benign (non-cancerous), borderline, or malignant (cancerous). Characterization of ovarian lesions is of great importance in order to plan adequate therapeutic procedures, and may influence management. Assessment of ovarian lesions or masses requires physical examination, laboratory tests and imaging techniques.

Osteochondromas are benign (non-cancerous) tumors that develop on the surface of a bone near the growth plate during childhood or adolescence. Most often, osteochondromas affect the long bones in the pelvis, the leg, or the shoulder blade. There is a small lifetime risk of malignant (cancerous) transformation to chondrosarcoma, which occurs during adulthood and most commonly in individuals with hereditary multiple osteochondromas (about 5 percent of cases). Symptoms vary depending on the anatomic site, extent, and distribution of involvement, but can include pain and numbness. Most osteochondromas are asymptomatic (do not cause symptoms) unless a fracture is present or impending.

Sometimes a testicle is not seen in adults on imaging - a condition called postpubertal cryptorchidism. This could be due to the testicle not forming prior to birth (congenital) or because the testicle never descended into the scrotum and slowly shrank in size (atrophied). Postpubertal cryptorchidism is associated with lower fertility, impaired hormone function and an increased risk of testicular cancer.

An ovarian teratoma is a benign congenital germ cell tumour. Teratomas contain elements from all three embryological layers: endoderm, mesoderm and ectoderm. They contain different tissue types, including, fat, cystic fluid, skin, soft tissues, hair and sometimes calcification including teeth.

The ovary was not seen on the MRI images which is consistent with a history of surgical removal of the ovary (oophorectomy).