Plantar fascia rupture in the absence of previous diagnosis of plantar fasciitis, corticosteroid injection, or injury is a rare occurrence with only 7 case reports in the literature since 1978. This is a case of spontaneous plantar fascia rupture in a 38-year-old active-duty US military member with current considerations in musculoskeletal ultrasound, other radiologic imaging, treatment, and followup of this diagnosis. ( A 38-year-old previously healthy active-duty male member of the US Armed Services presented to a family medicine clinic for evaluation of severe right heel and plantar midfoot pain of less than 24 hours' duration. The patient reported that while going up for a layup shot during a basketball game, he experienced a "pop" and immediate pain in his left foot localized at the front and middle part of his heel. He was able to finish the remaining 30 minutes of the game but continued to have pain that caused limping the remainder of the game. Afterward, he self treated with ice, elevation of his foot, and an unspecified nonsteroidal anti-inflammatory medication (NSAID). Two days later when his symptoms, foot pain and limping, persisted with minimal improvement despite these home treatments, he presented to clinic for evaluation. As a military medic himself, the patient provided a thorough medical history that included having no previous heel pain, diagnosis of plantar fasciitis, footwear or activity changes, minimalist footwear, or trauma.On further questioning, he denied ever having had corticosteroid injections or fluoroquinolone use.On inspection his examination was remarkable for an antalgic gait, without pes planus or cavus. His foot demonstrated some mild swelling, tenderness, and ecchymosis in the mid-plantar foot (Figure 1). Tenderness to palpation was noted extending from the medial calcaneal tubercle distally 3 cm. Ottowa Ankle and Foot Rules were negative including no tenderness to palpation at the posterior medial or lateral malleoli, base of the fifth metatarsal, or the navicular bone. His Achilles tendon was nontender with an intact extensor mechanism based on Thompson test, and later confirmed with ultrasound. Active range of motion was normal in all planes, and his deep tendon reflexes at the Achilles tendons were normal. His muscle strength testing, including flexor and extensor hallicus longus, flexor and extensor digitori, tibialis anterior and posterior as well as fibularis longus and brevis, gastrocnemius and soleus, were all 5/5 and symmetric with the unaffected foot. Neurovascular examination demonstrated normal sensation to light touch over the entirety of the foot and ankle, capillary refill was less than 1 second, and the dorsalis pedis and posterior tibial pulses were symmetric with the unaffected foot. Special testing including anterior drawer, talar tilt, squeeze, Thompson were negative. Plain x-rays of the ankle and foot were negative for fracture or other clinically relevant findings. The patient was diagnosed with a likely plantar fascia rupture, placed in a rigid contro...